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Brian Vohnsen

Associate Professor

School of Physics
Room: 113
School of Physics
University College Dublin (UCD)
Dublin 4
Ireland

Tel: +353-(1)-716-2217 or +353-(1)-716-2089
Email: brian.vohnsen@ucd.ie

Biography

Education:
MSc in Optical Engineering and laser Technology, Aalborg University, Denmark 1994.
PhD in Optical Physics, Aalborg University, Denmark 1998.

Course degree on University Pedagogics, Aalborg University, Denmark 1998 - 2000.
Habilitation Lecturer, Universidad de Cantabria, Spain 2006.
ANECA evaluated Profesor Contratado Doctor, Spain 2006.
Awarded tenure UCD, Ireland 2009.
NovaUCD Campus Company Development Programme, Ireland 2009.

Employment history:
Assistant Lecturer, Aalborg University, Denmark, 1998 - 2001.
Temporary Lecturer, Aalborg University, Denmark, 2001.
Marie Curie Post Doc, Universidad de Murcia, Spain, 2001 - 2003.
Ramón y Cajal researcher, Universidad de Murcia, Spain, 2003 - 2008.
Lecturer and Stokes awardee, University College Dublin, Ireland, 2008 - 2013.
Associate Professor (senior lecturer), University College Dublin, Ireland, 2014 - .

Extended research stays:
Post Grad. researcher, IBM Rüschlikon Research laboratory, Switerland, 1996 - 1997 (6 mths)
Sokrates Guest Lecturer, University of Athens, Greece, 2001 (2 wks)

The research of Dr. Brian Vohnsen addresses Optics and Advanced Optical Imaging applied to topics at the Nano-Bio interface in particular. Some of this research straddles the interface with LifeSciences including ocular optics of the human eye and the probing of tissues with non-toxic light. Limiting factors such as resolution, subdiffraction techniques, contrast and information contents are all being addressed.

Professional

Honours and Awards

Year: 2017.
Title: College of Science Teaching Excellence Award
Year: 2011.
Title: Senior Status of the Optical Society of America
Year: 2008.
Title: Stokes Award
Year: 2003.
Title: Ramon y Cajal Award

Associations

Association: SPIE, Function/Role: Member
Association: Optical Society of America (OSA), Function/Role: Lifetime Senior member
Association: Institute of Physics (IOP) Ireland, Function/Role: Member
Association: The Association for Research in Vision and Ophthalmology (ARVO), Function/Role: Member
Association: Danish Optical Society (DOPS) below the European Optical Society (EOS), Function/Role: Member

Patents

Patent US 20130016319 A1 : Retinal imaging systems with improved resolution

Disclosures

Retinal photoreceptor mosaic simulator. Inventor(s):B. Vohnsen and D. Valente, Submitted: 07-JUN-16
Retinal imaging systems with improved resolution. Inventor(s):B. Vohnsen, D. Rativa, Submitted: 23-DEC-09
 

Conference Contributions

B. Vohnsen (2017) Understanding photoreceptor directionality and its role in vision. [Invited Oral Presentation], Retina, Dublin, Ireland , 12-OCT-17 - 14-OCT-17.
N. Sharmin, S. Qaysi, A. Carmichael, and B. Vohnsen (2017) Analysis of the relationship between defocus and accommodation and its relationship to emmetropization and myopic progression of the human eye. [Poster Presentation], International Myopia Conference, Birmingham, UK , 14-SEP-17 - 17-SEP-17.
A. Carmichael, N. Sharmin, and B. Vohnsen (2017) Mimicking the impact of myopia on the Stiles-Crawford effect of the first kind. [Poster Presentation], International Myopia Conference, Birmingham, UK , 14-SEP-17 - 17-SEP-17.
B. Vohnsen (2017) Physical optics approach to myopia. [Other], International Myopia Conference, Birmingham, UK , 14-SEP-17 - 17-SEP-17.
S. Qaysi, D. Valente, and B. Vohnsen (2017) Differential detection of photoreceptor tilts using a quadrant pupil. [Poster Presentation], Photonics Ireland 2017, Galway, Ireland , 13-SEP-17 - 15-SEP-17.
B. Vohnsen (2017) Surface-plasmon-based wavefront sensing. [Plenary Lecture], Ultrafast optics / optics, photonics and upcoming methods and applications (UFO/OPUMA) 2017, Mexico City , 31-JUL-17 - 04-AUG-17.
B. Vohnsen (2017) La óptica del ojo humano y la retina. [Invited Lecture], Ultrafast optics / optics, photonics and upcoming methods and applications (UFO/OPUMA) 2017, Mexico City , 31-JUL-17 - 04-AUG-17.
B. Vohnsen (2017) [Conference Organising Committee Member], Fall Vision Meeting, Washington DC, USA , 13-OCT-17 - 15-OCT-17.
B. Vohnsen (2017) [Conference Organising Committee Member], Photonics Ireland 2017, Galway, Ireland , 13-SEP-17 - 15-SEP-17.
Salihah Qaysi, Denise Valente, and Brian Vohnsen (2017) Relative Determination of Cone Pointing Using a Sectored Pupil and Adaptive Optics Fundus Photography. [Poster Presentation], ARVO Imaging, Baltimore USA , 06-MAY-17 - 06-MAY-17.
Rebecca M. McQuaid, Michael Mrochen, Ruslan Dmitriev, Dmitri Papkovski, and Brian Vohnsen (2017) In-Vitro Estimation of O2 Concentrations during Corneal Cross-Linking (CXL) for Porcine Corneas and Collagen Type-I Gels. [Poster Presentation], ARVO, Baltimore, USA , 07-MAY-17 - 11-MAY-17.
Denise Valente and Brian Vohnsen (2017) Retinal Simulator for Refractive Eye Models and Retinal Implants. [Poster Presentation], ARVO, Baltimore, USA , 07-MAY-17 - 11-MAY-17.
Brian Vohnsen, Alessandra Carmichael, Najnin Sharmin, Salihah Qaysi, and Denise Valente (2017) Direct Integration of the Stiles-Crawford Effect of the First Kind using Pupil Flicker Methodology. [Poster Presentation], ARVO, Baltimore, USA , 07-MAY-17 - 11-MAY-17.
B. Vohnsen (2017) The optics of the human eye and retina. [Invited Oral Presentation], Maxwell Society Photon Stories, Cumberland Lodge, Windsor, UK , 24-FEB-17 - 26-FEB-17.
P. S. Thomas, D. Rativa, D. Keegan and B. Vohnsen (2016) The impact of cone photoreceptor directionality on retinal imaging. [Poster Presentation], Retina 2016 (Fighting Blindness), Dublin , 10-NOV-16 - 11-NOV-16.
S. Qaysi and B. Vohnsen (2016) Analysis of photoreceptor pointing using quadrant pupil detection. [Poster Presentation], Retina 2016 (Fighting Blindness), Dublin , 11-NOV-16 - 12-NOV-16.
B. Vohnsen (2016) Vision & Color FiO-7 committee member and Technical Group Chair Appl. of Visual Science for the Fall Vision Meeting. [Conference Organising Committee Member], Frontiers in Optics and Fall Vision Meeting 2016, Rochester, NY, USA , 16-OCT-16 - 23-OCT-16.
B. Vohnsen, D. Valente, R. Deshpande, A. Pors and S. Bozhevolnyi (2016) Towards Wavefront Sensing with Metamaterials. [Oral Presentation], Frontiers in Optics 2016, Rochester, NY, USA , 16-OCT-16 - 21-OCT-16.
D. Valente and B. Vohnsen (2016) Retina-simulating phantom produced by chemically amplified photolithography. [Oral Presentation], Frontiers in Optics 2016, Rochester, NY, USA , 16-OCT-16 - 21-OCT-16.
S. Qaysi, D. Valente, and B. Vohnsen (2016) Analysis of photoreceptor pointing using quadrant pupil detection. [Oral Presentation], OSA Fall Vision Meeting, Rochester, NY, USA , 21-OCT-16 - 23-OCT-16.
V. Vohnsen (2016) Session presider: Novel Design Concepts for Eye Correction and Vision Simulators I. [Chaired Session], Frontiers in Optics 2016, Rochester, NY, USA , 16-OCT-16 - 21-OCT-16.
Salihah Qaysi and Brian Vohnsen (2016) Analysis of photoreceptor pointing using quadrant pupil detection. [Poster Presentation], Biophotonics and Imaging Graduate Summer School, Ballyvaughan, Ireland , 05-SEP-16 - 09-SEP-16.
B. Vohnsen (2016) Sensing Wavefront Slopes Using Intensity Gradients. [Invited Oral Presentation], Adaptive Optics: Analysis, Methods & Systems (OSA), Heidelberg, Germany , 25-JUL-16 - 28-JUL-16.
Rebecca M. McQuaid, Michael C. Mrochen, Ruslan Dmitriev, Dmitri Papkovski, and Brian Vohnsen (2016) Monitoring of O2 concentrations during Corneal Cross-Linking (CXL) by Phosphorescence Lifetime Imaging Microscopy (PLIM). ARVO, Seattle, USA , 01-MAY-16 - 05-MAY-16.
Hugh J. Morris, Brian Vohnsen, Stacey S. Choi , and Nathan Doble (2016) Factors Affecting the Magnitude of Cone Directionality in the Stiles-Crawford Effect of the First Kind. [Poster Presentation], ARVO, Seattle , 01-MAY-16 - 05-MAY-16.
Brian Vohnsen, Denise Valente, Salihah Qaysi, and Rebecca M. McQuaid (2016) How Long Must a Photoreceptor Be to Become Waveguiding?. [Poster Presentation], ARVO, Seattle , 01-MAY-16 - 05-MAY-16.
R. McQuaid, M. Mrochen, R. I. Dmitriev, D. B. Papkovsky, and B. Vohnsen (2015) Monitoring of O2 concentrations during CXL by Phosphorescence Lifetime Imaging Microscopy (PLIM). [Oral Presentation], 11th International Congress of Corneal Cross-Linking, Boston, USA , 04-DEC-15 - 05-DEC-15.
B. Vohnsen (2015) Subcommittee chair: Vision and Color FiO-OSA. [Conference Technical Committee Chairperson], Frontiers in Optics 2015, San Jose, CA, USA , 18-OCT-15 - 22-OCT-15.
B. Vohnsen (2015) Session presider: Advances in Ocular Biometry and Studies of the Anterior Eye. [Chaired Session], Frontiers in Optics 2015, San Jose, CA, USA , 18-OCT-15 - 22-OCT-15.
Brian Vohnsen, Stacey S. Choi, Nathan Doble, Elaine Wells-Gray, Heping Xu, and Alan Stitt (2015) Modeling High-Resolution SLO and OCT Retinal Imaging using Backscattering of Light from Elementary Sources. [Oral Presentation], Frontiers in Optics 2015, San Jose, CA, USA , 18-OCT-15 - 22-OCT-15.
D. Valente, D. Rativa and B. Vohnsen (2015) New Arrangements for Waveguide-Based Wavefront Sensors. [Oral Presentation], Frontiers in Optics 2015, San Jose, CA, USA , 18-OCT-15 - 22-OCT-15.
B. Vohnsen and D. Valente (2015) Wavefront Sensing via Attenuated Reflection using Near-Resonant Surface-Plasmon Polariton Excitation. [Oral Presentation], Frontiers in Optics 2015, San Jose, CA, USA , 18-OCT-15 - 22-OCT-15.
B. Vohnsen (2015) Biophotonics of the eye and photoreceptors. [Invited Oral Presentation], The International Year of Light Minisymposium Nanostructured Optical Fields, Odense, Denmark , 19-JUN-15 - 19-JUN-15.
D. Valente, D. Rativa, and B. Vohnsen (2015) Wavefront sensing using a bundle of waveguides. [Poster Presentation], Photonics Ireland 2015, Cork, Ireland , 02-SEP-15 - 04-SEP-15.
B. Vohnsen and D. Valente (2015) Sensing wavefront derivatives using attenuated reflection in the Kretschmann configuration. [Poster Presentation], Photonics Ireland 2015, Cork, Ireland , 02-SEP-15 - 04-SEP-15.
S. Qaysi, D. Valente, and B. Vohnsen (2015) Analyzing photoreceptor directionality using quadrant pupil detection. [Poster Presentation], Photonics Ireland 2015, Cork, Ireland , 02-SEP-15 - 04-SEP-15.
B. Vohnsen (2015) Session I: Imaging. [Chaired Session], Photonics Ireland 2015, Cork, Ireland , 02-SEP-15 - 04-SEP-15.
R. McQuaid, M. Mrochen, and B. Vohnsen (2015) Rate of riboflavin diffusion for corneal cross-linking. [Oral Presentation], Photonics Ireland 2015, Cork, Ireland , 02-SEP-15 - 04-SEP-15.
DJR Millán, D Valente, LAG Malagón, B Vohnsen (2015) Solar Tracker Sensor Based on a Quadrant Optical Fiber Array (withdrawn). [Oral Presentation], Frontiers in Optics 2015, San Jose, CA, USA , 18-OCT-15 - 22-OCT-15.
J. J. Li, N. Jan, M. Jewel, D. Valente, J.L. Grimm, B. Vohnsen and I. A. Sigal (2015) Comparison of collagen fibrillar architecture of the lamina cribrosa using polarization-tunable second-harmonic optical microscopy and polarimetric optical microscopy. [Poster Presentation (Refereed)], ARVO, Denver, CO, USA , 03-MAY-15 - 08-MAY-15.
B. Vohnsen, S. Qaysi, P. Anjos, and D. Valente (2015) Exploring photoreceptor directionality using quadrant pupil detection. [Poster Presentation (Refereed)], ARVO, Denver, CO, USA , 03-MAY-15 - 07-MAY-15.
R. McQuaid, V. Akondi, M. Mrochen, and B. Vohnsen (2015) Refractive change in porcine eyes following corneal cross-linking. [Poster Presentation (Refereed)], ARVO ISIE, Denver, CO, USA , 02-MAY-15 - 02-MAY-15.
D. Valente, D. Rativa and B. Vohnsen (2015) Liquid-filled photonic crystal fibre as a retinal simulator and wavefront sensor (best poster award). [Poster Presentation], 1st Brazil Ireland Science Week, Dublin, Ireland , 23-FEB-15 - 26-FEB-15.
Rebecca McQuaid, Michael Mrochen, and Brian Vohnsen (2014) Rate of riboflavin diffusion prior to corneal cross-linking (CXL) under the influence of corneal channels. [Poster Presentation], 10th International Congress of Corneal Cross-Linking, Zurich, Switzerland , 05-DEC-14 - 06-DEC-14.
Brian Vohnsen (2014) [Conference Organising Committee Chairperson], Frontiers in Optics 2014, Tucson, Arizona, USA , 19-OCT-14 - 23-OCT-14.
B. Vohnsen (2014) Modeling Photoreceptor Mosaic Imaging as Backscattering of Light from Multilayered Discs. [Oral Presentation], Frontiers in Optics 2014, Tucson, Arizona, USA , 18-OCT-14 - 23-OCT-14.
Md Atikur Rahman Jewel, Vyas Akondi and Brian Vohnsen (2014) 3-D Analysis of Pinhole Size Optimization for a Confocal Signal-based Wavefront Sensor. [Poster Presentation], Frontiers in Optics 2014, Tucson, Arizona, USA , 19-OCT-14 - 23-OCT-14.
B. Vohnsen (2014) Eye diagnostics (Session VII). [Chaired Session], Visual and Physiological Optics VPO 2014, Wroclaw, Poland , 25-AUG-14 - 27-AUG-14.
B. Vohnsen (2014) Visual Optics (Session I). [Chaired Session], Visual and Physiological Optics VPO 2014, Wrocklaw, Poland , 25-AUG-14 - 27-AUG-14.
B. Vohnsen (2014) Session moderator. [Chaired Session], ARVO annual meeting 2014, Orlando, Florida, USA , 04-MAY-14 - 08-MAY-14.
Rebecca M. McQuaid, JiaJun Li, Michael Mrochen, and Brian Vohnsen (2014) Lateral Diffusion Coefficient in CXL with Corneal Channels. [Poster Presentation (Refereed)], ARVO 2014, Orlando, FL, USA , 04-MAY-14 - 08-MAY-14.
B. Lochocki and B. Vohnsen (2014) Single Beam Frequency Flickering Analysis of the Stiles-Crawford Effect of the First Kind. [Poster Presentation (Refereed)], ARVO 2014, Orlando, FL, USA , 04-MAY-14 - 08-MAY-14.
JiaJun Li, Denise Valente, Sara Castillo and Brian Vohnsen (2014) Polarization Controlled Second-Harmonic Microscopy For Cornea Collagen-I Fibril Imaging. [Poster Presentation (Refereed)], ARVO 2014, Orlando, FL, USA , 04-MAY-14 - 08-MAY-14.
B. Vohnsen (2014) Modeling Photoreceptor Imaging as Light Scattering by Arrayed Dipolar Antennas. [Poster Presentation (Refereed)], ARVO 2014, Orlando, FL, USA , 04-MAY-14 - 08-MAY-14.
S. Neumayer, I. Bdikin, A. Kholkin, J. J. Li, B. Vohnsen, and B. J. Rodriguez (2014) DNA Nucleobase Crystals as Functional Biomaterials: Investigation of Unexpected Electromechanical Behavior of Thymine Microcrystals Grown by Slow Evaporation. [Poster Presentation], MRS Spring Meeting, San Francisco, USA , 21-APR-14 - 25-APR-14.
J. P. Ryle, B. Vohnsen and J. T. Sheridan (2014) Far-field ocular microtremor measurement system. [Poster Presentation], SPIE Photonics Europe, Brussels , 14-APR-14 - 17-APR-14.
B. Vohnsen (2014) Photoreceptor directionality and the Stiles-Crawford effects. [Invited Oral Presentation], Developments in Optics and Communications 2014, Riga, Latvia , 09-APR-14 - 12-APR-14.
B. Vohnsen (2014) Antenna eyes and photoreceptor directionality. [Invited Lecture], NUIG OSA Student chapter workshop - 04/04/14, NUI Galway, Ireland , 04-APR-14 - 04-APR-14.
B. Vohnsen and Eberhard Spoerl (2013) [Chaired Session], 9th International Congress of Corneal Cross-Linking, Dublin, Ireland , 06-DEC-13 - 07-DEC-13.
B. Vohnsen (2013) Emerging technologies: Brillouin scattering and 2 Photon. [Plenary Lecture], 9th International Congress of Corneal Cross-Linking, Dublin, Ireland , 06-DEC-13 - 07-DEC-13.
Michael Mrochen, Farhad Hafezi, Brian Vohnsen, Bradley Randleman, and Theo Seiler (2013) [Conference Organising Committee Member], 9th International Congress of Corneal Cross-Linking, Dublin Ireland , 06-DEC-13 - 07-DEC-13.
JiaJun Li, Rebecca McQuaid, Michael Mrochen, Arthur Cummings, and Brian Vohnsen (2013) Cornea crosslinking second-harmonic imaging and estimation of Young¿s modulus. [Poster Presentation], 9th International Congress of Corneal Cross-Linking, Dublin, Ireland , 06-DEC-13 - 07-DEC-13.
Rebecca McQuaid, JiaJun Li, Michael Mrochen, Arthur Cummings, and Brian Vohnsen (2013) [Poster Presentation], 9th International Congress of Corneal Cross-Linking, Dublin, Ireland , 06-DEC-13 - 07-DEC-13.
B. Vohnsen (2013) Are photoreceptors waveguides?. [Oral Presentation], Arbeitskreises Ophthalmische Optik, Darmstadt, Germany , 16-NOV-13 - 17-NOV-13.
B. Lochocki and B. Vohnsen (2013) Spectral characterization of the Stiles-Crawford effect of the first kind. [Oral Presentation], Arbeitskreises Ophthalmische Optik, Darmstadt, Germany , 16-NOV-13 - 17-NOV-13.
B. Vohnsen (2013) Second-harmonic imaging of collagen fibrils, intraocular pressure and corneal cross linking. [Invited Oral Presentation], Frontiers in Optics 2013, Orlando, FL, USA , 06-OCT-13 - 10-OCT-13.
B. Vohnsen, B. Lochocki, and C. Vela (2013) The integrated Stiles-Crawford effect for coherent and incoherent extended sources. [Poster Presentation], OSA Fall Vision Meeting, Houston, TX, USA , 04-OCT-13 - 06-OCT-13.
B. Lochocki and B. Vohnsen (2013) Single-beam flickering for characterization of the Stiles-Crawford effect across the visible spectrum. [Poster Presentation], OSA Fall Vision Meeting, Houston , 04-OCT-13 - 06-OCT-13.
S. Castillo, V. Akondi and B. Vohnsen (2013) Digital Multi-faceted Pyramid Wavefront Sensor. [Oral Presentation], Photonics Ireland 2013, Belfast, Northern Ireland , 04-SEP-13 - 06-SEP-13.
Brian Vohnsen, Diego Rativa Millan, Carmen Vela, Benjamin Lochocki, and Philip B. Kruger (2013) The role of defocus on photoreceptor light coupling analyzed with a waveguide-based retinal simulator. [Poster Presentation (Refereed)], ARVO annual meeting 2013, Seattle, USA , 05-MAY-13 - 09-MAY-13.
JiaJun Li and Brian Vohnsen (2013) Second-Harmonic Microscopy for Imaging Collagen Fibril Organization in the Cornea. [Oral Presentation], Electromechanics in Biosystems Workshop, Conway, UCD, Dublin, Ireland , 26-MAR-13 - 28-MAR-13.
R. McQuaid, J.J. Li, A. Cummings, M. Mrochen, and B. Vohnsen (2012) Effect of Higher Intensity Corneal Cross-Linking (CXL) In-Vitro using Second Harmonic (SH) Optical Microscopy. [Oral Presentation], 8th International Congress of Corneal Cross-Linking, Geneva, Switzerland , 07-DEC-12 - 08-DEC-12.
JiaJun Li and Brian Vohnsen (2012) Exploring Directionality in Second-Harmonic Cornea Microscopy. [Poster Presentation], 1st Workshop on Opto-Imaging Ireland, NUI Galway, Ireland , 07-DEC-12 - 07-DEC-12.
Sara Castillo and Brian Vohnsen (2012) Influence of wavefront slope on effective retinal images using a spatial light modulator. [Poster Presentation], 1st Workshop on Opto-Imaging Ireland, NUI Galway, Ireland , 07-DEC-12 - 07-DEC-12.
Benjamin Lochocki, Krishnakumar Venkateswaran and Brian Vohnsen (2012) Impact of Cone Disarray on the Stiles-Crawford Effect of the First Kind. [Poster Presentation], 1st Workshop on Opto-Imaging Ireland, NUI Galway, Ireland , 07-DEC-12 - 07-DEC-12.
Carmen Vela, Benjamin Lochocki and Brian Vohnsen (2012) Transposing the Stiles-Crawford effect from pupil to retina in eye modelling. [Poster Presentation], 1st Workshop on Opto-Imaging Ireland, NUI Galway, Ireland , 07-DEC-12 - 07-DEC-12.
Vyas Akondi, Atikur Jewel, and Brian Vohnsen (2012) Selection of pinhole size in wavefront sensor-less adaptive optics. [Oral Presentation], 1st Workshop on Opto-Imaging Ireland, NUI Galway, Ireland , 07-DEC-12 - 07-DEC-12.
Brian Vohnsen (2012) Wavefront sensing and retinal modelling with a photonic crystal fibre. [Oral Presentation], 1st Workshop on Opto-Imaging Ireland, NUI Galway, Ireland , 07-DEC-12 - 07-DEC-12.
Brian Vohnsen (2012) Optical Imaging and Analysis of the Human Eye and Vision (invited plenary talk). [Invited Oral Presentation], CBEB: XXIII congresso brasileiro de engenharia biomedica, Porto de Galinhas BRAZIL , 01-OCT-12 - 05-OCT-12.
C. Vela, B. Lochocki, and B. Vohnsen (2012) Transposing the Stiles-Crawford effect from pupil to retina in eye modelling. [Poster Presentation], 6th EOS Topical Meeting on Visual and Physiological Optics, UCD, Dublin, Ireland , 20-AUG-12 - 22-AUG-12.
B. Vohnsen, B. Lochocki, D. Rativa, and C. Vela (2012) Pupil apodization in scanning retinal imaging. [Oral Presentation], 6th EOS Topical Meeting on Visual and Physiological Optics, UCD Dublin, Ireland , 20-AUG-12 - 22-AUG-12.
S. Castillo and B. Vohnsen (2012) Analysis of the Stiles-Crawford effect of the first kind with tuneable interference gratings. [Oral Presentation], 6th EOS Topical Meeting on Visual and Physiological Optics, UCD, Dublin, Ireland , 20-AUG-12 - 22-AUG-12.
B. Lochocki and B. Vohnsen (2012) Defocus-corrected determination of the Stiles-Crawford effect of the first kind. [Poster Presentation], 6th EOS Topical Meeting on Visual and Physiological Optics, UCD, Dublin, Ireland , 20-AUG-12 - 22-AUG-12.
J. Li and B. Vohnsen (2012) Second-harmonic cornea microscopy enhancement with annular aperture filters. [Poster Presentation], 6th EOS Topical Meeting on Visual and Physiological Optics, UCD, Dublin, Ireland , 20-AUG-12 - 22-AUG-12.
R. McQuaid, J. Li, A. Cummings, M. Mrochen, and B. Vohnsen (2012) Comparison of accelerated corneal cross-linking to standard cross-linking using second-harmonic optical microscopy. [Poster Presentation], 6th EOS Topical Meeting on Visual and Physiological Optics, UCD, Dublin, Ireland , 20-AUG-12 - 22-AUG-12.
B. Vohnsen; (2012) EMVPO-6 (www.myeos.org/events/emvpo2012). [Conference Organising Committee Chairperson], 6th EOS Topical Meeting on Visual and Physiological Optics, University College Dublin, Ireland , 20-AUG-12 - 22-AUG-12.
Brian Vohnsen, Sara Castillo, Diego Rativa, Benjamin Lochocki, and JiaJun Li (2012) A review of annular apertures in analysis of the Stiles-Crawford effect and optical imaging of the eye. [Oral Presentation], OptoInformatics 2012, NUI Maynooth, Ireland , 14-JUN-12 - 16-JUN-12.
Benjamin Lochocki and Brian Vohnsen (2012) Stiles-Crawford effect of the first kind: Analysis of fitting functions. [Poster Presentation], OptoInformatics 2012, NUI Maynooth, Ireland , 14-JUN-12 - 16-JUN-12.
Carmen Vela Garcia, Benjamin Lochocki, and Brian Vohnsen (2012) Transposing the Stiles-Crawford effect from pupil to retina in eye modelling. [Poster Presentation], OptoInformatics 2012, NUI Maynooth, Ireland , 14-JUN-12 - 16-JUN-12.
Md Atikur Rahman Jewel and Brian Vohnsen (2012) Wavefront Correction by a Confocal Signal-based Wavefront Sensor. [Poster Presentation], OptoInformatics 2012, NUI Maynooth, Ireland , 14-JUN-12 - 16-JUN-12.
Rebecca McQuaid, JiaJun Li, Arthur Cummings, Michael Mrochen, and Brian Vohnsen (2012) Comparison of Accelerated Corneal Cross-Linking to Standard Cross-Linking using Second-Harmonic Optical Microscopy. [Poster Presentation], OptoInformatics 2012, NUI Maynooth, Ireland , 14-JUN-12 - 16-JUN-12.
Sara Castillo and Brian Vohnsen (2012) Impact of aberrations in high numerical-aperture vectorial diffraction microscopy. [Poster Presentation], OptoInformatics 2012, NUI Maynooth, Ireland , 14-JUN-12 - 16-JUN-12.
Vyas Akondi and Brian Vohnsen (2012) Demonstration of a dithering Hartmann-Shack wavefront sensor using a spatial light modulator. [Oral Presentation], OptoInformatics 2012, NUI Maynooth, Ireland , 14-JUN-12 - 16-JUN-12.
Brian Vohnsen (2012) OptoInformatics 2012 Chair. [Conference Organising Committee Chairperson], OptoInformatics 2012, NUI Maynooth, Ireland , 14-JUN-12 - 16-JUN-12.
R.M. McQuaid, J. Li, B. Cummings, M. Mrochen, B. Vohnsen (2012) Comparison Of Corneal Cross-Linking To Standard Cross-Linking And Effect Of IntraOcular Pressure Using Second-Harmonic Optical Imaging. [Poster Presentation], ARVO ISIE, Ft Lauderdale, USA , 05-MAY-12 - 05-MAY-12.
Brian Vohnsen, Benjamin Lochocki, Carmen Vela-Garcia, and Diego Rativa (2012) Confocal Retinal Imaging using Scanning Laser Opthalmoscopy with Annular Beams. [Poster Presentation], BioMed (OSA), Miami, Florida USA , 28-APR-12 - 02-MAY-12.
S. Castillo and B. Vohnsen (2012) Influence of Wavefront Slope on Effective Retinal Images Using a Spatial Light Modulator. [Poster Presentation], BioMed (OSA), Miami, Florida USA , 29-APR-12 - 02-MAY-12.
R. McQuaid, J.J. Li, A. Cummings, M. Mrochen, and B. Vohnsen (2012) Corneal cross-linking (CXL) with second harmonic (SH) optical microscopy imaging and accelerated corneal cross-linking preliminary clinical results. [Poster Presentation], EEOO 2012 (European Academy of Optometry and Optics), Dublin, Ireland , 20-APR-12 - 22-APR-12.
Rebecca McQuaid, JiaJun Li, Arthur Cummings, Michael Mrochen, and Brian Vohnsen; (2011) Comparison of Accelerated Corneal Cross-Linking (AXL) to Standard Cross-Linking (CXL) using Second Harmonic (SH) Optical Microscopy Imaging. [Oral Presentation], 7th International Congress of Corneal Cross-Linking, Zurich, Switzerland , 09-DEC-11 - 10-DEC-11.
B. Vohnsen, J. Li, A. Jewel; (2011) Second-Harmonic Microscopy for Cornea Collagen Fibril Imaging: Theoretical and Experimental Optimization. [Oral Presentation], Frontiers in Optics, OSA 2011, San Jose CA , 16-OCT-11 - 20-OCT-11.
B. Lochocki, D. Rativa, and B. Vohnsen; (2011) Foveal and parafoveal cone-photoreceptor characterization of the 1st Stiles-Crawford effect. [Poster Presentation], Photonics Ireland 2011, Malahide, Ireland , 07-SEP-11 - 09-SEP-11.
J. Li, B. Vohnsen; (2011) Second-harmonic microscopy optimization of cornea collagen-i fibril imaging. [Poster Presentation], Photonics Ireland 2011, Malahide, Ireland , 07-SEP-11 - 09-SEP-11.
S. Castillo, B. Vohnsen; (2011) Visual impact of interference gratings created with a liquid-crystal spatial light modulator (poster award). [Poster Presentation], Photonics Ireland 2011, Malahide , 07-SEP-11 - 09-SEP-11.
B. Vohnsen, D. Rativa; (2011) Directionality and imaging of cone photoreceptors in the living human eye. [Oral Presentation], Photonics Ireland 2011, Malahide, Ireland , 07-SEP-11 - 09-SEP-11.
Brian Vohnsen; (2011) What's new with the Stiles-Crawford effect?. [Invited Lecture], Engineering the Eye III, Benasque, Spain , 09-JUN-11 - 12-JUN-11.
Diego Rativa and Brian Vohnsen; (2011) Wavefront sensing using a liquid-filled photonic crystal fiber. [Oral Presentation], 8th International Workshop on Adaptive Optics for Industry and Medicine, Murcia, Spain , 05-JUN-11 - 09-JUN-11.
Brian Vohnsen and Diego Rativa; (2011) Promises and limitations of wavefront corrections with annular apertures using Scanning Laser Ophthalmoscopy. [Oral Presentation], 8th International Workshop on Adaptive Optics for Industry and Medicine, Murcia, Spain , 05-JUN-11 - 09-JUN-11.
Sara Castillo and Brian Vohnsen; (2011) Visual impact of interference gratings created with a liquid-crystal spatial light modulator. [Poster Presentation (Refereed)], 8th International Workshop on Adaptive Optics for Industry and Medicine, Murcia, Spain , 05-JUN-11 - 09-JUN-11.
JiaJun Li and Brian Vohnsen; (2011) Second-Harmonic Microscopy Optimization of Cornea Collagen-I Fibril Imaging. [Poster Presentation], IOP Ireland spring weekend, Carlingford, Ireland , 15-APR-11 - 17-APR-11.
Sara Castillo, Diego Rativa, and Brian Vohnsen; (2011) Wavefront sensing with an axicon. [Poster Presentation (Refereed)], IONS-9 Salamanca, Salamanca, Spain , 07-APR-11 - 09-APR-11.
B. Vohnsen; (2011) Visual Optics. [Chaired Session], BODA (BIO-OPTICS: DESIGN AND APPLICATION) OSA, Monterey CA, USA , 04-APR-11 - 06-APR-11.
B. Vohnsen; (2011) Bio-Inspired Optics. [Chaired Session], BODA (BIO-OPTICS: DESIGN AND APPLICATION) OSA, Monterey CA, USA , 04-APR-11 - 06-APR-11.
B. Vohnsen; (2011) Revisiting the Stiles-Crawford effect in retinal imaging. [Invited Oral Presentation], BODA (BIO-OPTICS: DESIGN AND APPLICATION) Optical Society of America, Monterey, CA, USA , 04-APR-11 - 06-APR-11.
B. Vohnsen; (2010) Lasers and the Science of the Eye . [Invited Oral Presentation], The Laser at 50, Queen's University Belfast , 13-SEP-10 - 13-SEP-10.
B. Vohnsen, B. Lochocki, and D. Rativa; (2010) Spectral Characterization of the First and Second Stiles-Crawford Effects using Tuneable Liquid-Crystal Filters. [Oral Presentation], EOS Topical Meeting: 5th European Meeting on Visual and Physiological Optics (EMVPO), Stockholm , 22-AUG-10 - 24-AUG-10.
D. Rativa and B. Vohnsen; (2010) Single and Multi Mode Characteristics of the Foveal Cones. [Oral Presentation], EOS Topical Meeting: 5th European Meeting on Visual and Physiological Optics (EMVPO), Stockholm , 22-AUG-10 - 24-AUG-10.
B. Vohnsen; (2010) Novel Instrumentation and Methodologies. [Chaired Session], EOS Topical Meeting: 5th European Meeting on Visual and Physiological Optics (EMVPO), Stockholm , 22-AUG-10 - 24-AUG-10.
D. Rativa, R. E. de Araujo, A. S.L. Gomes and B. Vohnsen; (2010) Hartmann-Shack wavefront sensing for nonlinear materials characterization. [Poster Presentation], OptoInformatics2010 Summerschool, Maynooth , 22-JUN-10 - 24-JUN-10.
Sara Castillo, Diego Rativa, and Brian Vohnsen; (2010) Wavefront Sensing with an Axicon. [Poster Presentation], OptoInformatics2010 Summerschool, Maynooth , 22-JUN-10 - 24-JUN-10.
B.Lochocki, D.Rativa, B.Vohnsen; (2010) Spectral characterization of the first and second Stiles-Crawford effects (SCE) effects using tunable liquid crystal filters. [Poster Presentation], OptoInformatics2010 Summerschool, Maynooth , 22-JUN-10 - 24-JUN-10.
JiaJun Li and Brian Vohnsen; (2010) Second-Harmonic Microscopy of Collagen-I Rich Tissues. [Poster Presentation], OptoInformatics2010 Summerschool, Maynooth , 22-JUN-10 - 24-JUN-10.
B. Vohnsen; (2010) The Stiles-Crawford Effects (oral presentation). [Conference Organising Committee Member], OptoInformatics2010 Summerschool, Maynooth , 22-JUN-10 - 24-JUN-10.
Paulina Segovia, Sara Castillo, JiaJun Li, and Brian Vohnsen; (2010) Towards Adaptive Optics Multiphoton Microscopy. [Poster Presentation], OptoInformatics2010 Summerschool, Maynooth , 22-JUN-10 - 24-JUN-10.
D. Rativa, R. de Araujo, and B. Vohnsen; (2009) Hartmann-Shack wavefront sensing of Zernike polynomials for nonlinear materials characterization. [Poster Presentation (Refereed)], Frontiers in Optics OSA, San Jose, California, USA , 11-OCT-09 - 15-OCT-09.
B. Vohnsen and D. Rativa; (2009) Spectral and spatial characteristics of the first Stiles-Crawford effect: experiment and theory. [Poster Presentation (Refereed)], Frontiers in Optics OSA, San Jose, California, USA , 11-OCT-09 - 15-OCT-09.
A. Bratu, J. Rice, and B. Vohnsen; (2009) Two-dimensional focusing of light --- towards sub-diffraction-limited imaging ---. [Poster Presentation (Refereed)], Photonics Ireland 2009, Kinsale, Ireland , 14-SEP-09 - 16-SEP-09.
Brian Vohnsen and Diego Rativa; (2009) Is the Stiles-Crawford effect of visual optics more than a curiosity?. [Poster Presentation (Refereed)], Photonics Ireland 2009, Kinsale, Ireland , 14-SEP-09 - 16-SEP-09.
D. Rativa, R. E. de Araujo, and B. Vohnsen; (2009) Hartmann-Shack wavefront sensing for nonlinear materials characterization. [Poster Presentation (Refereed)], Photonics Ireland 2009, Kinsale, Dublin , 14-SEP-09 - 16-SEP-09.
Brian Vohnsen; (2009) Optical imaging beyond the diffraction limit. [Invited Oral Presentation], UCD one-day optics meeting (OSA and SPIE Student chapters), Engineering, UCD, Dublin, Ireland , 02-JUL-09 - 02-JUL-09.
Brian Vohnsen; (2009) Ultrahigh resolution optical imaging for biomedical and ophthalmic applications. [Invited Oral Presentation], Imaging Technology Core (ITC) Summer Workshop, RCSI, Dublin, Ireland , 23-JUN-09 - 24-JUN-09.
B. Vohnsen and D. Rativa; (2009) Light Control for Ultra-High Resolution Biomedical Imaging - Ophthalmic Applications -. [Poster Presentation], EMPS Innovation Day, University College Dublin , 04-JUN-09 - 04-JUN-09.
C.A. Andrei, B. Vohnsen, and N.V. Buchete; (2009) Multiscale molecular modeling of collagen fibrils. [Poster Presentation (Refereed)], Nanotech2009, Houston , 03-MAY-09 - 07-MAY-09.
B. Vohnsen; (2009) Photoreceptor Waveguiding and the Hue Shift of the Second Stiles Crawford Effect. [Poster Presentation (Refereed)], ARVO 2009 meeting, Fort Lauderdale, Florida , 03-MAY-09 - 07-MAY-09.
D. Zerulla, B. Ashall, and B. Vohnsen; (2009) Poisson's Spot and Focussing of Surface Plasmon Polaritons. [Oral Presentation], 73rd DPG Spring meeting, Dresden, Germany (March '09) , 22-MAR-09 - 27-MAR-09.
B. Vohnsen; (2008) Waveguide models and the Stiles-Crawford effects. [Invited Oral Presentation], FiO, OSA, Rochester, NY, USA , 19-OCT-08 - 25-OCT-08.
C.Molero, B. Vohnsen, J.M. Marin, and P. Artal; (2008) Multiphoton imaging of ex-vivo corneas. [Poster Presentation], ESCRS European Society of Cataract & Refractive Surgeons, Berlin, Germany , 13-SEP-08 - 17-SEP-08.
B. Vohnsen, D. Zerulla; (2008) Poisson's Spot and Focusing of Surface Plasmon Polaritons. [Poster Presentation], NFO 10, Buenos Aires, Argentina , 01-SEP-08 - 05-SEP-08.
B. Jaeken, B. Vohnsen, E.J. Fernández, and P. Artal; (2008) Cone density analysis in myopic eyes by using ocular speckle interferometry. [Oral Presentation], 4th European Meeting in Visual & Physiological Optics, Heraklion, Crete, Greece , 31-AUG-08 - 02-SEP-08.

Committees

Committee : Seed funding award scheme (Career Development)
Committee : Teaching and Learning UCD School of Physics
Committee : Co-Curricular Skills Working Group
Committee : Optical Society of America Vision and Color Section
Committee : Vision and Color committee of the Frontiers in Optics, Optical Society of America
Committee : Human Research Ethics Committee - Sciences (HREC)
Committee : NanoBio Science MSc programme
Committee : Graduate Teaching Programme Board (GTPB)
Committee : Science Promotion Committee (SPC)
 

Education

Year 1998 Institution: Aalborg University, Denmark
Qualification: PhD Subject:
Year 1994 Institution: Aalborg University, Denmark
Qualification: MSc Subject:

Languages

Danish:
English:
Spanish:
German:

Consultancy

Client: Reflective Measurement Systems

Outreach Activities

December 4th 2017 Transition year presentation "Physics of the human eye" and experiment on refractive measurements.
November 24th 2017 Physics Open Evening participation
On NEWSTALK FutureProof Sept. 30th 2017, interview by Jonathan McCrea
http://www.newstalk.com/listen_back/20/39367/30th_September_2017_-_Futureproof_Part_1/ 
UCD Connections Alumni Magazine, Sept. 2017/18 p. 33, professor profile: http://alumni.ucd.ie/magazine
Transition year talk "Physics of the eye" Dec. 5th 2016
Maxwell Society, Kings College London, Feb. 24 - 26th 2017.  Cumberland Lodge, Windsor, UK.
Invited talk "Optics of the human eye and retina"  
"Recent developments in Nanotechnology and Physics" UCD Postgraduate Open Evening (March 2nd 2015)
UCD Science Postgraduate Open Night Info Stand and Talk "Nanotechnology and NanoBio Science " (November 23rd 2015)
Transition Year talk "Physics of the Eye" Nov. 30th 2015
Light & Shadow, International Year of Light (May 23rd, 2015) Talk "Light for Eye Diagnostics" and hands-on display "From Rays to Waves in Light & Colour" (with D. Valente and A. Amaral).
Organizer of "A Year in Visual Optics: Understanding the Anterior Human Eye", Optical Society of America Webinar (January 15th 2015)
Organizer of "A Year in Visual Optics: Understanding the Human Eye & Visual Systems", Optical Society of America Webinar (December 10th 2013)
UCD Open days Nov. 8th 2014
24 November Postgraduate Open Evening
18th November 2014 Physics Open Evening
  • The Irish Times: "When the experimenters become the experiment" January 2nd 2014
  • The Irish Times: "Why are the pupils in your eyes so dark?" April 24th 2012
  • Samvirke (in Danish): "Ser man slankere ud i sort?" April 24th 2012
3/12/2013 UCD Physics Open Evening
2/12/2013 Transition year talk: "The optics of the eye and vision"
27/11/2013 UCD Science Graduate Open Evening presentation of MSc physics programmes
20/11/2013 UCD Physics Society talk: "The photonics of the human-eye retina explored with optics and psychophysics"
Nov. 9th 2013 UCD open day
22.08.2013 Opening comments for film showing of "Copenhagen" about the 1941 meeting between Niels Bohr and Werner Heisenberg
UCD annual physics society poster evaluation panel. April 25th 2013
IOP Ireland UCD stand "Young Scientist" RDS January 10th 2013
Graduate Expo on November 16th 2012
Transition year talk "An eye for physics" UCD 3rd December 2012
"Why did I choose a career in Physics?" Presentation for 1st-year UCD students Sept. 6th 2012
Invitation and introduction of Prof. Sir John Pendry for the UCD - RDS distinguished speaker series 2012 February 14th 2012 who gave a presentation on "Metamaterials and the science of invisibility"
UCD Open Days 12/11/2011
New ERA presentation "AN EYE FOR PHYSICS - and the Biophysics of Vision -" at HEAR and DARE Orientation at UCD 30/08/2011
"Where do I come from and why did I choose a career in (Optical) Physics?" Presentation for 1st year students at UCD 09/09/2011
Transition year talk "An eye for physics" March 10th 2011
08.02.2011 Invited talk "An eye for physics - an inside view on the physics of the human eye" at National University of Ireland Maynooth ASTRO2 physics society.
30.11.2010 School of Physics Open Evening
UCD open days December 10th and 11th 2010
Science Open Evening Nov. 9th 2010
Higher Options in the RDS, Dublin 17.09.2010

New ERA Orientation at UCD, Invited talk B. Vohnsen: "50 years of LASERS (2010)"  August 31st 2010

UCD SummerSchool June 8th and 9th 2010, practicals and nanobio lab tour with young scientist winners 
UCD Physics Open Evening Jan 26th 2010 TALK: What have lasers ever done for us?
BT Young Scientist RDS, IOP -Ireland, Jan. 14th & 15th 2010
UCD Open Days, Dec. 4th and 5th 2009
Transition year "An Eye for Physics - Biophysics and Vision" Talk given Dec 3rd 2009.

UCD Physics Open Evening Nov 24th 2009

Science Career and Information Evening, Sept. 29th (2009) and Nov. 10th (2009)
New ERA Orientation at UCD, Invited talk B. Vohnsen: "The History of Optics" August 25th 2009
Contribution to UCD Science Summer School June 8th and 9th 2009. Laboratory work.
BT Young Scientist (IOP and UCD) Jan 8th - 10th 2009
UCD Open Days Dec 5th and 6th 2008
Transition year "An Eye for Physics - Biophysics and Vision" Talk given Dec 3rd 2008
Science Festival UCD (Nov 10th, 11th 2008)
Contribution to UCD Science Summer School June 9th and 10th 2008. Talks and laboratory work.

Journals Edited

Optics Letters: Editor.
Ophthalmic & Physiological Optics : The Journal Of The British College Of Ophthalmic Opticians (Optometrists): Editor.
Journal Of Ophthalmology: Co-Editor.

Other Activities

Editor for Encyclopedia of Modern Optics II (Elsevier) 2016 responsible for Biomedical Imaging Applications
Lead Guest Editor for Ophthalmic & Physiological Optics, Wiley (submission deadline Nov. 1st 2012). Special issue on Visual and Physiological Optics in relation to the recent organized and chaired 6th European Optical Society Topical Meeting on Visual and Physiological Optics (2012) at University College Dublin, Ireland
Guest editor Journal of Ophthalmology, manuscript due date: 03/02/2012

http://www.hindawi.com/journals/jop/si/cauv/
SPIE Optics Educational Degree Programme representative for UCD - Physics

Publications

Books

B. Vohnsen; (1997) Phase Conjugation of Optical Near Fields (PhD Thesis Report). Aalborg University, Denmark: Aalborg University, Denmark. [Details]

Book Chapters

R. McQuaid, M. Mrochen, B. Vohnsen, E. Spoerl, S. Kling, and C. J. Roberts (2017) 'Fundamentals of Corneal Cross Linking (Chapter 3)' In: M. M. Sinjab and A. B. Cummings (eds). Corneal Collagen Cross Linking. Switzerland: Springer. , pp.63-86 [DOI] [Details]
B. Vohnsen (2017) 'The retina and the Stiles-Crawford effects (Chapter 18)' In: P. Artal (eds). Handbook of Visual Optics, Vol. I. Boca Raton, USA: CRC Press. [DOI] [Details]
 

Peer Reviewed Journals

D. Valente and B. Vohnsen (2017) 'Retina-simulating phantom produced by photolithography'. Optics Letters, 42 (22):4623-4626. [DOI] [Details]
B. Vohnsen, A. Carmichael , N. Sharmin , S. Qaysi , and D. Valente (2017) 'Volumetric integration model of the Stiles-Crawford effect of the first kind and its experimental verification'. Journal of Vision, 17 (12):18:1-18:11. [DOI] [Details]
B. Lochocki and B. Vohnsen (2017) 'Uniaxial flicker analysis of the psychophysical Stiles-Crawford effects'. Journal of Modern Optics, 64 :347-356. [DOI] [Details]
V. Akondi, B. Vohnsen, and S. Marcos (2016) 'Virtual pyramid wavefront sensor for phase unwrapping'. Journal of Applied Optics, 55 (29):8138-8394. Available Online [DOI] [Details]
R. McQuaid, M. Mrochen, and B. Vohnsen (2016) 'Rate of riboflavin diffusion from intrastromal channels before corneal crosslinking'. Journal of Cataract and Refractive Surgery, 42 (3):462-468. [DOI] [Details]
Brian Vohnsen and Denise Valente (2015) 'Surface-plasmon-based wavefront sensing'. Optica, 2 (12):1024-1027. [DOI] [Details]
V. Akondi, C. Falldorf, S. Marcos, and B. Vohnsen (2015) 'Phase unwrapping with a virtual Hartmann-Shack wavefront sensor'. Optics Express, 23 (20):25425-25439. [DOI] [Details]
D. Valente, D. Rativa, and B. Vohnsen (2015) 'Wavefront sensing using a liquid-filled photonic crystal fiber'. Optics Express, 23 (10):13005-13014. [DOI] [Details]
Md. Atikur Rahman Jewel, Vyas Akondi, and Brian Vohnsen (2015) 'Optimization of sensing parameters for a confocal signal-based wavefront corrector in microscopy'. Journal of Modern Optics, 62 (10):786-792. [DOI] [Details]
James Ryle, Brian Vohnsen, and John T. Sheridan (2015) 'Simultaneous drift, microsaccades, and ocular microtremor measurement from a single noncontact far-field optical sensor'. Journal of Biomedical Optics, 20 (2):027004. [DOI] [Details]
V. Akondi, Md. A. R. Jewel and B. Vohnsen (2014) 'Closed-loop adaptive optics using a spatial light modulator for sensing and compensating of optical aberrations in ophthalmic applications'. Journal of Biomedical Optics, 19 (9):096014. [DOI] [Details]
B. Vohnsen (2014) 'Directional sensitivity of the retina: A layered scattering model of outer-segment photoreceptor pigments'. Biomedical Optics Express, 5 (5):1569-1587. [DOI] [Details]
V. Akondi, S. Castillo, and B. Vohnsen (2014) 'Multi-faceted digital pyramid wavefront sensor'. OPTICS COMMUNICATIONS, 323 :77-86. [DOI] [Details]
V. Akondi, A. R. Jewel, and B. Vohnsen (2014) 'Digital phase-shifting point diffraction interferometer'. Optics Letters, 39 (6):1641-1644. Available Online [DOI] [Details]
Rebecca McQuaid, JiaJun Li, Arthur Cummings, Michael Mrochen, and Brian Vohnsen (2014) 'Second-harmonic reflection imaging of normal and accelerated corneal cross-linking using porcine corneas and the role of intraocular pressure'. Cornea, 33 :125-130. [DOI] [Details]
A. R. Jewel, V. Akondi, and B. Vohnsen (2013) 'A direct comparison between a MEMS deformable mirror and a liquid crystal spatial light modulator in signal-based wavefront sensing'. Journal of the European Optical Society, 8 :13073:1-13073:10. Available Online [DOI] [Details]
B. Lochocki and B. Vohnsen (2013) 'Defocus-corrected analysis of the foveal Stiles-Crawford effect of the first kind across the visible spectrum'. Journal Of Optics, 15 :125301. Available Online [DOI] [Details]
Vyas Akondi, Sara Castillo, and Brian Vohnsen (2013) 'Digital pyramid wavefront sensor with tunable modulation'. Optics Express, 21 :18261-18272. [DOI] [Details]
V. Akondi and B. Vohnsen (2013) 'Myopic aberrations: impact of centroiding noise in Hartmann Shack wavefront sensing'. Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians (Optometrists), 33 :434-443. [DOI] [Details]
S. Castillo and B. Vohnsen (2013) 'Exploring the Stiles-Crawford Effect of the First Kind with Coherent Light and Dual Maxwellian Sources'. Applied Optics, 52 (1):A1-A8. Available Online [DOI] [Details]
B. Vohnsen and D. Rativa; (2011) 'Ultrasmall Spot Size Scanning Laser Ophthalmoscopy'. biomedical optics express, 2 (6):1597-1609. Available Online [DOI] [Details]
D. Rativa and B. Vohnsen; (2011) 'Analysis of Individual Cone-Photoreceptor Directionality using Scanning Laser Ophthalmoscopy'. Biomedical Optics Express, 2 (6):1423-1431. Available Online [DOI] [Details]
B. Lochocki, D. Rativa and B. Vohnsen; (2011) 'Spatial and Spectral Characterisation of the First and Second Stiles-Crawford Effects using Tuneable Liquid-Crystal Filters'. Journal of Modern Optics, 58 :1817-1825. Available Online [DOI] [Details]
D. Rativa and B. Vohnsen; (2011) 'Single- and Multimode Characteristics of the Foveal Cones: The Super-Gaussian Function'. Journal of Modern Optics, 58 :1809-1816. Available Online [DOI] [Details]
B. Vohnsen, S. Castillo, and D. Rativa; (2011) 'Wavefront Sensing with an Axicon'. Optics Letters, 36 (6):846-848. Available Online [DOI] [Details]
D. Rativa and B. Vohnsen; (2011) 'Simulating Human Photoreceptor Optics using a Liquid-Filled Photonic Crystal Fiber'. biomedical optics express, 2 (3):543-551. Available Online [DOI] [Details]
B. Vohnsen and D. Rativa; (2011) 'Absence of an Integrated Stiles-Crawford Function for Coherent Light'. Journal of Vision, 11 ((1):19):1-10. Available Online [DOI] [Details]
B. Ashall, B. Vohnsen, M. Berndt, and D. Zerulla; (2009) 'Controlling Polarization Twisting of Light Resulting from Surface Plasmon Interactions with Threefold Symmetric Nanostructures'. Physical Review B, 80 (24):245413-1-245413-5. Available Online [DOI] [Details]
D. Rativa, R. E. de Araujo, A. S. Gomes, and B. Vohnsen ; (2009) 'Hartmann-Shack Wavefront Sensing for Nonlinear Materials Characterization'. Optics Express, 17 (24):22047-22053. Available Online [DOI] [Details]
B. Vohnsen; (2009) 'On the Spectral Relation between the First and Second Stiles-Crawford Effect'. Journal of Modern Optics, 56 (20):2261-2271. Available Online [Details]
J. M. Bueno, B. Vohnsen, L. Roso, and P. Artal; (2009) 'Temporal Wavefront Stability of an Ultrafast High-Power Laser Beam'. Applied Optics, 48 (4):770-777. Available Online [DOI] [Details]
V. Nourrit, J. Bueno, B. Vohnsen, and P. Artal; (2008) 'Nonlinear Registration for Scanned Retinal Images: Application to Ocular Polarimetry'. Applied Optics, 47 (29):5341-5347. Available Online [Details]
B. Vohnsen and P. Artal; (2008) 'Second-Harmonic Microscopy of Ex-Vivo Porcine Corneas'. Journal of Microscopy-Oxford, 232 (1):158-163. Available Online [DOI] [Details]
I. Iglesias and B. Vohnsen; (2007) 'Polarization Structuring for Focal Volume Shaping in High-Resolution Microscopy'. Optics Communications, 271 :40-47. Available Online [Details]
B. Vohnsen; (2007) 'Photoreceptor Waveguides and Effective Retinal Image Quality'. Journal of the Optical Society of America A-Optics Image Science and Vision, 24 :597-607. Available Online [Details]
V. Nourrit, B. Vohnsen, and P. Artal; (2005) 'Blind Deconvolution for High-Resolution Confocal Scanning Laser Ophthalmoscopy'. Journal of Optics A: Pure and Applied Optics, 7 :585-592. Available Online [Details]
B. Vohnsen, I. Iglesias , and P. Artal; (2005) 'Guided Light and Diffraction Model of Human-Eye Photoreceptors'. Journal of the Optical Society of America A-Optics Image Science and Vision, 22 :2318-2328. Available Online [DOI] [Details]
B. Vohnsen, I. Iglesias , and P. Artal; (2005) 'Directional Light Scanning Laser Ophthalmoscope'. Journal of the Optical Society of America A-Optics Image Science and Vision, 22 :2606-2612. Available Online [DOI] [Details]
J. M. Bueno and B. Vohnsen; (2005) 'Polarimetric High-Resolution Confocal Scanning Laser Ophthalmoscope'. Vision Research, 45 :3526-3534. Available Online [Details]
B. Vohnsen, I. Iglesias, and P. Artal (2004) 'Directional Imaging of the Retinal Cone Mosaic'. Optics Letters, 29 :968-970. Available Online [DOI] [Details]
D. A. Papathanassoglou and B. Vohnsen; (2003) 'Direct Visualization of Evanescent Optical Waves'. American Journal of Physics, 71 :670-677. Available Online [Details]
V. A. Sterligov, P. Cheyssac, R. Kofman, S. I. Lysenko, P. M. Lytvyn, B. Vohnsen, S. I. Bozhevolnyi, and A. A. Maradudin; (2002) 'Near/Far-Field Investigations of the Interaction Between Surface Waves and Nanoparticles'. Physica Status Solidi B-Basic Research, 229 :1283-1294. Available Online [Details]
S. I. Bozhevolnyi and B. Vohnsen; (2002) 'Near-Field Imaging of Optical Phase and its Singularities'. Optics Communications, 212 :217-223. Available Online [Details]
B. Vohnsen, S. I. Bozhevolnyi, K. Pedersen, J. Erland, J. R. Jensen, and J. M. Hvam; (2001) 'Second-Harmonic Scanning-Optical Microscopy of Semiconductor Quantum Dots'. Optics Communications, 189 :305-311. Available Online [Details]
B. Vohnsen and S. I. Bozhevolnyi; (2001) 'Near- and Far-Field Second-Harmonic Imaging of Quasi-Phase-Matching Crystals'. Journal of Microscopy-Oxford, 202 :244-249. Available Online [Details]
B. Vohnsen and S. I. Bozhevolnyi; (2001) 'Coupling of Surface-Plasmon Polaritons to Directional Far-Field Radiation by an Individual Surface Protrusion'. Applied Optics, 40 :6081-6085. Available Online [Details]
S. I. Bozhevolnyi, A. Maidykovski, B. Vohnsen, and V. Zwiller; (2001) 'Reflection Second-Harmonic Microscopy of Individual Semiconductor Microstructures'. Journal of Applied Physics, 90 :6357-6362. Available Online [Details]
B. Vohnsen and S. I. Bozhevolnyi; (2001) 'Comment on “Local Observations of Phase Singularities in Optical Fields in Waveguide Structures”'. Physical Review Letters, 87 :259401. Available Online [Details]
B. Vohnsen and S. I. Bozhevolnyi; (1999) 'Characterization of Near-Field Optical Probes'. Applied Optics, 38 :1792-1797. Available Online [Details]
B. Vohnsen and S. I. Bozhevolnyi; (1999) 'Optical Characterization of Probes for Photon Scanning Tunnelling Microscopy'. Journal of Microscopy-Oxford, 194 :311-316. Available Online [Details]
S. I. Bozhevolnyi, B. Vohnsen, and E. A. Bozhevolnaya; (1999) 'Transfer Functions in Collection Scanning Near-Field Optical Microscopy'. Optics Communications, 172 :171-179. Available Online [Details]
B. Vohnsen and S. I. Bozhevolnyi; (1998) 'Near-Field Optical Microscopy with a Phase-Conjugating Mirror'. Optics Communications, 148 :331-337. Available Online [Details]
S. I. Bozhevolnyi, B. Vohnsen, and K. Pedersen; (1998) 'Near-Field Optical Microscopy of Nonlinear Susceptibilities'. Optics Communications, 150 :49-55. Available Online [Details]
S. I. Bozhevolnyi and B. Vohnsen; (1997) 'Phase Conjugation of Optical Near Fields by a Surface Hologram'. Optics Communications, 135 :19-23. Available Online [Details]
B. Vohnsen and S. I. Bozhevolnyi; (1997) 'Holographic Approach to Phase Conjugation of Optical Near Fields'. Journal of the Optical Society of America A-Optics Image Science and Vision, 14 :1491-1499. Available Online [Details]
S. I. Bozhevolnyi and B. Vohnsen; (1997) 'Near-Field Optics with Uncoated Fiber Tips: Light Confinement and Spatial Resolution'. Journal of the Optical Society of America B-Optical Physics, 14 :1656-1663. Available Online [Details]
S. I. Bozhevolnyi, B. Vohnsen, A. V. Zayats, and I. I. Smolyaninov; (1996) 'Fractal Surface Characterisation: Implications for Plasmon Polariton Scattering'. Surface Science, 356 :268-274. Available Online [Details]
S. I. Bozhevolnyi, B. Vohnsen, E. A. Bozhevolnaya and S. Berntsen; (1996) 'Self-Consistent Model for Photon Scanning Tunneling Microscopy: Implications for Image Formation and Light Scattering near a Phase- Conjugating Mirror'. Journal of the Optical Society of America A-Optics Image Science and Vision, 13 :2381-2392. Available Online [Details]
S. I. Bozhevolnyi and B. Vohnsen; (1996) 'Near-Field Optical Holography'. Physical Review Letters, 77 :3351-3354. Available Online [Details]
B. Vohnsen, S. Bozhevolnyi, and R. Olesen; (1995) 'Study of Shear Force Technique for Near-Field Microscopy with an Uncoated Fiber Tip'. Ultramicroscopy, 61 :207-213. Available Online [Details]
S. I. Bozhevolnyi, B. Vohnsen, I. I. Smolyaninov, and A. V. Zayats; (1995) 'Direct Observation of Surface Polariton Localization Caused by Surface Roughness'. Optics Communications, 117 :417-423. Available Online [Details]

Other Journals

S. S. Choi, A. E. Elsner, R. J. Zawadzki, and B. Vohnsen (2013) 'Clinical applications of high resolution in-vivo retinal imaging (editorial)' Journal of Ophthalmology 2013 :312974. [DOI] [Details]
Encarna Alcón, Diego Ayala, Antonio Benito, Esther Berrio, Luis Blanco, Juan Bueno, Carmen Cánovas, Astrid Duque, Enrique Fernández, Emilio Gualda, Bart Jaeken, Ignacio Iglesias, Silvestre Manzanera, Alejandro Mira, Pedro Prieto, Guillermo Pérez, Christina Schwarz, Eloy Villegas, Eva Acosta, Linda Lundstrom, Juan Tabernero, Brian Vohnsen y Pablo Artal,; (2009) 'Líneas de Investigación del Laboratorio de Óptica de la Universidad de Murcia (LO·UM)' Óptica Pura y Aplicada . [Details]
B. Vohnsen, I. Iglesias, J. M. Bueno, V. Nourrit, and P. Artal; (2006) 'Desarrollo de Técnicas que Mejoran la Calidad de Imagen en Oftalmoscopia de Barrido Láser' Ver y Oir 23 :317-320. [Details]
Pablo Artal, Juan Bueno, Ignacio Iglesias, Pedro Prieto, Esther Berrio, Eloy Villegas, Antonio; (2006) 'Investigación en el Laboratorio de Optica de la Universidad de Murcia' Óptica pura y aplicada 39 :287-292. [Details]
B. Vohnsen, I. Iglesias, and P. Artal; (2004) 'High-Resolution Imaging of the In-Vivo Human Eye Retina' DOPS-nyt: Journal of the Danish Optical Society 2 :16-19. [Details]
Vohnsen, B. ; Bozhevolnyi, S. I. ; Pedersen, K. ; Østergaard, John Erland ; Jensen, Jacob Riis ; Leosson, Kristjan ; Hvam, Jørn Märcher; (2001) 'Scanning second-harmonic optical microscopy of self-assembled InAlGaAs quantum dots' Technical Digest. Quantum Electronics and Laser Science Conference :135. [Details]

Conference Publications

D. Valente and B. Vohnsen (2016) Retinal simulator produced by chemically amplified photolithography (best student presentation award) . In: Jos Rozema eds. Visual and Physiological Optics (VPO2016) ISBN: 978-90-5728-521-9 Antwerp, Belgium, , 22-AUG-16 - 24-AUG-16 , pp.112-114 [Details]
B. Vohnsen and D. Valente (2016) Ultradense sampling of ocular aberrations using resonant intensity derivatives . In: Jos Rozema eds. Visual and Physiological Optics (VPO2016) ISBN: 978-90-5728-521-9 Antwerp, , 22-AUG-16 - 24-AUG-16 , pp.211-213 [Details]
S. Qaysi, D. Valente, and B. Vohnsen (2016) Analysis of photoreceptor pointing using quadrant pupil detection . In: Jos Rozema eds. Visual and Physiological Optics (VPO2016) ISBN: 978-90-5728-521-9 Antwerp, Belgium, , 22-AUG-16 - 24-AUG-16 , pp.109-111 [Details]
Vyas Akondi, Claas Falldorf, Susana Marcos, and Brian Vohnsen (2015) Fourier phase unwrapping in a digital phase shifting point diffraction interferometer . In: S. Bonora eds. 10th International Workshop on Adaptive Optics for Industry and Medicine Padova, Italy, , 15-JUN-15 - 19-JUN-15 [Details]
D. Valente, D. Rativa, and B. Vohnsen (2015) Liquid-filled photonic crystal fiber as wavefront sensor . In: S. Bonora eds. 10th International Workshop on Adaptive Optics for Industry and Medicine Padova, Italy, , 15-JUN-15 - 19-JUN-15 [Details]
B. Vohnsen and D. Valente (2015) Intensity-based Wavefront Sensing employing Surface Plasmon Polaritons . In: S. Bonara eds. 10th International Workshop on Adaptive Optics for Industry and Medicine Padova, Italy, , 15-JUN-15 - 19-JUN-15 [Details]
V. Akondi, S. Marcos, and B. Vohnsen (2015) Phase estimation in digital phase-shifting point diffraction interferometry using a virtual Hartmann-Shack wavefront sensor Adaptive Optics: Methods, Analysis and Applications Arlington, Virginia, USA, , 07-JUN-15 - 11-JUN-15 [Details]
B. Vohnsen, B. Lochocki, and C. Vela (2014) Integrated Stiles-Crawford effect in normal vision Visual and Physiological Optics (ISBN: 978-83-7493-847-1) Wroclaw, Poland, , 25-AUG-14 - 27-AUG-14 , pp.368-371 [Details]
F. R. dos Santos, R. E. Araujo, and B. Vohnsen (2014) Parafovea cone-photoreceptor directionality analysis in scanning superluminescent diode ophthalmoscopy Visual and Physiological Optics (ISBN: 978-83-7493-847-1) Wroclaw, Poland, , 25-AUG-14 - 27-AUG-14 , pp.300-303 [Details]
D. Valente, D. Rativa and B. Vohnsen (best OSA student poster presentation) (2014) The role of defocus analysed with a waveguide-based retinal simulator Visual and Physiological Optics (ISBN: 978-83-7493-847-1) Wroclaw, Poland, , 25-AUG-14 - 27-AUG-14 , pp.357-360 [Details]
B. Lochocki and B. Vohnsen (winner OSA best student oral presentation) (2014) The 1st Stiles-Crawford effect: a single beam flickering system Visual and Physiological Optics (ISBN: 978-83-7493-847-1) Wroclaw, Poland, , 25-AUG-14 - 27-AUG-14 , pp.183-185 [Details]
V. Akondi, A. R. Jewel, and B. Vohnsen (2014) Closed-loop adaptive optics using a single spatial light modulator for ophthalmic applications Visual and Physiological Optics (ISBN 978-83-7493-847-1) Wroclaw, Poland, , 25-AUG-14 - 27-AUG-14 , pp.1-4 [Details]
B. Vohnsen (2014) Multi-aperture model of photoreceptor outer segments Visual and Physiological Optics (ISBN: 978-83-7493-847-1) Wroclaw, Poland, , 25-AUG-14 - 27-AUG-14 , pp.372-375 [Details]
B. Lochocki and B. Vohnsen (2013) Non-Maxwellian characterization of the Stiles-Crawford effect by wavefront-projected tilt Frontiers in Optics 2013 Orlando, FL, USA, , 06-OCT-13 - 10-OCT-13 [Details]
B. Lochocki and B. Vohnsen (2013) Single-beam flickering for characterization of the Stiles-Crawford effect across the visible spectrum OSA Fall Vision Meeting 2013 Houston, TX, USA, , 04-OCT-13 - 06-OCT-13 [Details]
B. Vohnsen (2013) Coherent Dipole Scattering from Visual Pigments and a Possible Connection to Photoreceptor Waveguiding Frontiers in Optics 2013 Orlando, FL, USA, , 06-OCT-13 - 10-OCT-13 [Details]
B. Vohnsen, B. Lochocki, and C. Vela (2013) The integrated Stiles-Crawford effect for coherent and incoherent extended sources OSA Fall Vision Meeting 2013 , 04-OCT-13 - 06-OCT-13 [Details]
V. Akondi, S. Castillo, Md. A. R. Jewel,,and B. Vohnsen (2013) Digital pyramid wavefront sensor Adaptive Optics: Methods, Analysis and Applications Arlington (VA) USA, , 23-JUN-13 - 27-JUN-13 [Details]
Md. A. R. Jewel, V. Akondi, and B. Vohnsen (2013) On pinhole size optimization in wavefront sensorless adaptive optics Adaptive Optics: Methods, Analysis and Applications Virginia (VA) USA, , 23-JUN-13 - 27-JUN-13 [Details]
Benjamin Lochocki, Krishnakumar Venkateswaran, and Brian Vohnsen (2012) Impact of Cone Disarray on the Stiles-Crawford Effect of the First Kind Frontiers in Optics 2012 Rochester, NY, USA, , 14-OCT-12 - 18-OCT-12 [Details]
Md. Atikur R. Jewel and Brian Vohnsen (2012) Confocal Signal-based Wavefront Sensing Frontiers in Optics 2012 Rochester, NY, USA, , 14-OCT-12 - 18-OCT-12 [Details]
Carmen Vela Garcia, Benjamin Lochocki, and Brian Vohnsen (2012) Modeling the Impact of the Stiles-Crawford Effect on Accommodation Directly at the Retina Frontiers in Optics 2012 Rochester, NY, USA, , 14-OCT-12 - 18-OCT-12 [Details]
B. Vohnsen and J. Li (2012) Second-Harmonic Microscopy with Annular Beams: Enhancement of Cornea Collagen Fibrils Frontiers in Optics 2012 Rochester, NY, USA, , 14-OCT-12 - 18-OCT-12 [Details]
D. Rativa and B. Vohnsen (2012) Wavefront sensing with an oil-filled photonic crystal fiber Frontiers in Optics 2012 Rochester, NY, USA, , 14-OCT-12 - 18-OCT-12 [Details]
Brian Vohnsen, Diego Rativa Millan, Benjamin Lochocki, and Carmen Vela-Garcia (2012) Photoreceptor Analysis using Entrance-Pupil Structuring and Motorized Confocal Scanning ARVO annual meeting 2012 Ft Lauderdale, USA, , 06-MAY-12 - 10-MAY-12 Available Online [Details]
Benjamin Lochocki, Carmen Vela-Garcia, and Brian Vohnsen (2012) Frequency Analysis of the Transient Stiles-Crawford Effect ARVO annual meeting 2012 Ft Lauderdale, USA, , 06-MAY-12 - 10-MAY-12 Available Online [Details]
JiaJun Li and Brian Vohnsen (2012) Exploring Directionality In Second-harmonic Cornea Microscopy ARVO annual meeting 2012 Ft Lauderdale, USA, , 06-MAY-12 - 10-MAY-12 Available Online [Details]
Diego Rativa and Brian Vohnsen (2012) Measuring Individual Cone Directionalities Using Scanning Laser Ophthalmoscopy ARVO annual meeting 2012 Available Online [Details]
B. Vohnsen, J. Li, and A. Jewel; (2011) Second-Harmonic Microscopy for Cornea Collagen Fibril Imaging: Theoretical and Experimental Optimization Frontiers in Optics, OSA annual meeting 2011 San Jose, CA, USA, , 16-OCT-11 - 20-OCT-11 [Details]
B. Vohnsen and D. Rativa; (2011) Confocal Scanning Laser Ophthalmoscopy with Ultrasmall Spot Size ARVO annual meeting 2011 Fort Lauderdale, Florida, USA, , 01-MAY-11 - 05-MAY-11 Available Online [Details]
D. Rativa, R. Blendowske, and B. Vohnsen; (2011) Effects Of Waveguide Properties Of Human Photoreceptor Cones, Simulating Its Optical Properties With A Photonic Crystal Fiber ARVO annual meeting 2011 Fort Lauderdale, Florida, USA, , 01-MAY-11 - 05-MAY-11 Available Online [Details]
JiaJun Li and Brian Vohnsen; (2011) Second-Harmonic Microscopy Optimization of Cornea Collagen-I Fibril Imaging ARVO annual meeting 2011 Fort Lauderdale, Florida, USA, , 01-MAY-11 - 05-MAY-11 Available Online [Details]
B. Vohnsen and D. Rativa; (2010) Absence of an Integrated Stiles-Crawford Function for Coherent Light ARVO annual meeting 2010 Fort Lauderdale, Florida, US, Available Online [Details]
D. Rativa and B. Vohnsen; (2010) Guided Light Spectral Properties of Foveal and Parafoveal Cones ARVO annual meeting 2010 Fort Lauderdale, Florida, US, Available Online [Details]
Diego Rativa, Brian Vohnsen, Anderson S. L. Gomes, Renato E. de Araujo; (2010) Novel high sensitivity Z-scan technique base on a Hartmann-Shack wavefront sensor . In: Peter E. Powers eds. Photonics West (SPIE) 2010, Proc SPIE Vol. 7582 San Francisco, US, , pp.758218-1-758218-8 Available Online [Details]
Diego Rativa, Renato de Araujo, and Brian Vohnsen; (2009) Hartmann-Shack Wavefront Sensing of Zernike Polynomials for Nonlinear Materials Characterization Frontiers in Optics, OSA annual meeting 2009 San Jose, California, USA, , pp.JWC43 Available Online [Details]
Brian Vohnsen and Diego Rativa; (2009) Spectral and Spatial Characteristics of the First Stiles-Crawford Effect: Experiment and Theory Frontiers in Optics, OSA annual meeting 2009 San Jose, California, USA, , pp.JWC77 Available Online [Details]
B. Vohnsen; (2009) Photoreceptor Waveguiding and the Hue Shift of the Second Stiles Crawford Effect ARVO Annual meeting 2009 Fort Lauderdale, Florida, USA, , 03-MAY-09 - 07-MAY-09 , pp.E-2742 Available Online [Details]
J.M. Bueno, B. Vohnsen, L. Roso, and P. Artal; (2008) Wavefront Sensing for Measuring the Stability of High-Power Laser Beams Frontiers in Optics (FiO) OSA Available Online [Details]
B. Vohnsen; (2008) Waveguide Models and the Stiles-Crawford Effects Frontiers in Optics (FiO) OSA Rochester NY, Available Online [Details]
J. M. Bueno, B. Vohnsen, P.M. Prieto, L. Roso, and P. Artal; (2008) Real time wavefront sensing for ultrafast high-power laser beams . In: C. Dainty eds. 6th Adaptive Optics for Industry and Medicine Galway, Ireland, , pp.175-181 [Details]
B. Vohnsen, I. Iglesias, and P. Artal; (2008) Coherent fibre-bundle wavefront sensor . In: C. Dainty eds. 6th Adaptive Optics for Industry and Medicine Galway, Ireland, , pp.163-168 [Details]
B. Vohnsen and P. Artal; (2007) Multiphoton Imaging of Cornea and Retinal Tissues ARVO annual meeting 2007 Fort Lauderdale, Florida, USA, , pp.E-4257 Available Online [Details]
V. P. Nourrit, B. Vohnsen, and P. Artal; (2007) Non-Linear Correction of Eye Movements for Scanning Laser Ophthalmoscope Imagery ARVO annual meeting 2007 Fort Lauderdale, Florida, USA, , pp.E-2765 Available Online [Details]
B. Vohnsen; (2006) Visual Implications of Retinal Photoreceptor Waveguiding ICO Topical Meeting on Optoinformatics/Information Photonics St Petersburg, Russia, , pp.248-250 [Details]
B. Vohnsen; (2006) From Image to Object in Near-Field Optical Microscopy ICO Topical Meeting on Optoinformatics/Information Photonics St Petersburg, Russia, , pp.360-362 [Details]
B. Vohnsen and P. Artal; (2005) On the Relation Between the Stiles¿Crawford Effect and Its Optical Equivalent ARVO annual meeting 2005 , pp.E-4332 Available Online [Details]
I. Iglesias, B. Vohnsen, and P. Artal; (2005) Confocal Scanning Retinal Imaging with Adaptive Optics . In: U. Wittrock eds. 4th Int. Workshop on Adaptive Optics for Industry and Medicine: Vol. 102 , pp.325-332 [Details]
B. Vohnsen; (2004) A Short History of Optics Summer School: DFT Beyond the Ground State Available Online [Details]
B. Vohnsen, I. Iglesias, and P. Artal; (2003) Confocal Scanning Laser Ophthalmoscope with Adaptive Optical Wavefront Correction . In: Jose-Angel Conchello, Carol J. Cogswell, and Tony Wilson eds. Photonics West (SPIE) Vol. 4964 San Jose, California, , pp.24-32 Available Online [Details]
B. Vohnsen and S. I. Bozhevolnyi; (1996) Light Scattering Near a Phase-Conjugating Mirror . In: O. Keller eds. Notions and Perspectives of Nonlinear Optics: Vol. 3 , pp.574-579 [Details]
S. I. Bozhevolnyi, A. V. Zayats, and B. Vohnsen; (1996) Weak Localization of Surface Plasmon Polaritons: Direct Observation with Photon Scanning Tunneling Microscope . In: M. Nieto-Vesperinas and N. García eds. Optics at the Nanometer Scale , pp.163-173 [Details]
B. Vohnsen and S. I. Bozhevolnyi; (1995) Optimization of the Shear Force Technique for Near-Field Microscopy . In: K. Hasche, W. Mirandé, and G. Wilkening eds. International Seminar on Quantitative Microscopy: Vol. F-21 PTB, Braunschweig, Germany, , pp.17-21 [Details]

Published Reports

M. Charnock and B. Vohnsen; (1994) Holographic Beamshaping. Aalborg University, Denmark, aub.auc.dk. [Details]
     

Editorial

Choi, SS,Elsner, AE,Zawadzki, RJ,Vohnsen, B (2013) Clinical Applications of High Resolution In-Vivo Retinal Imaging. Editorial [DOI] [Details]
B. Vohnsen, L. N. Thibos, and H. Ginis (2013) Visual and physiological optics. Editorial [DOI] [Details]
                                                                                                                             

Research

Research Interests

The research of Dr. Vohnsen is focussed on optics, imaging, nanooptics and biophotonics. He obtained his PhD degree from Aalborg University, Denmark in 1998 in work related to optical phase conjugation of optical near fields but has since expanded his interests further into advanced optical techniques. In this period he was also visiting researcher during 6 months at the IBM Rüschlikon research laboratory in Switzerland where he worked on novel near-field optical probe design. In 2001 he joined the Optics Laboratory LOUM in Murcia, Spain, first as a Marie Curie Post Doc and later as a Ramón y Cajal Research Fellow. In 2008 he became Lecturer and Stokes awardee in the School of Physics, Univ. College Dublin, Ireland. His current interests include, but are not limited to, optical imaging at and beyond the classical diffraction limit, the optics of the human eye and the retina, multiphoton microscopy, and adaptive optics. He forms part of the NanoBio stronghold at UCD and leads a research group on Advanced Optical Imaging.

Research Projects

Sponsor : University College Dublin (UCD)
Title : Estimation of O2 concentrations in-vitro using collagen type I compared to porcine corneas during Corneal Cross-Linking (CXL)
Start Date / End Date : 01-APR-17 / 30-SEP-18
Sponsor : University College Dublin (UCD)
Title : Retinal Simulator for Refractive Eye Models and Retinal Implants, by Denise Valente dos Santos
Start Date / End Date : 01-APR-17 / 30-SEP-18
Sponsor : University College Dublin (UCD)
Title : OBRSS Research Support Scheme
Start Date / End Date : 01-NOV-16 / 31-OCT-19
Sponsor : University College Dublin (UCD)
Title : Monitoring of O2 concentrations during CXL by Phosphorescence Lifetime Imaging Microscopy (PLIM)
Start Date / End Date : 01-APR-16 / 30-SEP-17
Sponsor : University College Dublin (UCD)
Title : Ultradense sensing of ocular aberrations
Start Date / End Date : 01-APR-16 / 30-SEP-17
Sponsor : HORIZON 2020
Title : Myopia: Fundamental understanding needed (MyFUN)
Start Date / End Date : 01-JAN-16 / 31-DEC-19
Sponsor : Enterprise Ireland (EI)
Title : Travel to London to meet partners for PHC proposal
Start Date / End Date : 03-SEP-14 / 02-MAR-15
Sponsor : Irish Research Council (IRC)
Title : Retinal directional reflectivity of light from single photoreceptor cones (RETINALLIGHT)
Start Date / End Date : 01-MAR-15 / 30-NOV-15
Sponsor : Irish Research Council (IRC)
Title : International year of light at the frontiers in optics (FRONTIERS)
Start Date / End Date : 01-MAR-15 / 30-NOV-15
Sponsor : University College Dublin (UCD)
Title : International year of light at the frontiers in optics
Start Date / End Date : 01-APR-15 / 30-SEP-16
Sponsor : Royal Embassy of Saudi Arabia
Title : Enhanced Retinal Imaging using Structured Illumination and Pupil Analysis
Start Date / End Date : 01-JAN-15 / 31-DEC-17
Sponsor : University College Dublin (UCD)
Title : Refractive procedures using Cross-Linking
Start Date / End Date : 01-APR-14 / 30-SEP-15
Sponsor : Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES)
Title : Ultrafast wavefront sensing and advanced microscopy
Start Date / End Date : 01-SEP-16 / 31-AUG-17
Sponsor : Irish Research Council (IRC)
Title : Refractive procedures using Cross-Linking
Start Date / End Date : 01-OCT-13 / 30-SEP-16
Sponsor : University College Dublin (UCD)
Title : Visual optics industry networking and retinal analysis
Start Date / End Date : 01-MAY-13 / 31-OCT-14
Sponsor : Science Foundation Ireland (SFI)
Title : Adaptive photonics for NanoScale BioImaging
Start Date / End Date : 01-FEB-08 / 31-JAN-13
Sponsor : University College Dublin (UCD)
Title : Adaptive Photonics for NanoScale Biolmaging
Start Date / End Date : 01-OCT-08 / 31-DEC-09
Sponsor : Enterprise Ireland (EI)
Title : Novel Optical Probe for Imaging and Diagnostic of the Human Eye (NOPIDE)
Start Date / End Date : 01-DEC-08 / 31-DEC-09
Sponsor : Science Foundation Ireland (SFI)
Title : Adaptive Photonics for Nanoscale Bioimaging
Start Date / End Date : 01-SEP-09 / 31-DEC-14
Sponsor : Irish Research Council for Science Engineering and Technology (IRCSET)
Title : Development of a full pupilar Stiles-Crawford function for improved visual testing and refractive optics design
Start Date / End Date : 01-FEB-11 / 31-JAN-14
Sponsor : Alcon Research Ltd.
Title : Visual impact and analysis of the Stiles-Crawford effects
Start Date / End Date : 01-FEB-11 / 31-JAN-14
Sponsor : University College Dublin (UCD)
Title : Ultrahigh-resolution diagnostics for the human retina
Start Date / End Date : 01-MAY-12 / 31-OCT-13
Sponsor : Science Foundation Ireland (SFI)
Title : Optoinformatics 2012
Start Date / End Date : 01-MAR-12 / 28-FEB-13
Sponsor : Science Foundation Ireland (SFI)
Title : 6th EOS Topical meeting on Visual and Physiological Optics
Start Date / End Date : 01-JUN-12 / 28-FEB-13

Recent Postgraduates

Denise Valente, PhD in wavefront sensing and retinal simulators UCD 2017

Doaa Alzanbgi, MSc in NanoBio Science UCD (2016/17)

Simon Munro, MSc in NanoBio Science UCD (2016/17)

Mona Ahmad Shuaib, MSc in NanoBio Science UCD (2016/17)

Munira Aldawsari, MSc in NanoBio Science UCD (2016/17)

Rebecca McQuaid, PhD in corneal cross linking UCD 2017

Ana Lizbeth Villarreal Rios, visiting PhD student (October 2016 - March 2017)

Prince Sunil Thomas, visiting researcher (September - December 2016)

Prince Sunil Thomas, MSc in NanoBio Science UCD (2015/16)

Shanmuga Sibi Mathialagani, MSc in NanoBio Science UCD (2015/16)

Maryam Alamer, MSc in NanoBio Science UCD (2015/16)

Reem Al Shammari, MSc in NanoBio Science UCD (2015/16)

Md. Atikur Rahman Jewel, PhD in Signal-Based Adaptive Optics UCD 2015

Alweyah Alali, MSc in NanoBio Science UCD (2014/15)

Salihah Qaysi, MSc in NanoBio Science UCD (2013/14)
 
Norah Alwabari, MSc in NanoBio Science UCD (2013/14)

JiaJun Li, PhD in Multiphoton Microscopy UCD 2014 
 
Benjamin Lochocki, PhD in Visual Optics UCD 2014

Sara Castillo, PhD in Optics Physics UCD 2014
 
Carmen Vela, on leave from PhD research 2014  

Arwa Bazaid (co-supervised by Dr Rodriguez), MSc in NanoBio Science UCD (2012/13)

Kholoud Alnahdi (co-supervised by Dr Rodriguez), MSc in NanoBio Science UCD (2012/13)

Amirah Alahmari, MSc in NanoBio Science UCD (2012/13)

Abeer Alshehri , MSc in NanoBio Science UCD (2012/13)

Shadia Alharbi, MSc in NanoBio Science UCD (2012/13)

Maha Alruwaili, MSc in NanoBio Science UCD (2012/13)

Amnah Alrajeh, MSc in NanoBio Science UCD (2012/13)

Ahlam Aldosari, MSc in NanoBio Science UCD (2012/13)

Wei Qin, MSc in NanoBio Science UCD (2012/13)

Afaf Al Shammari, MSc in NanoBio Science UCD (2012/13)

Petteri Teikari, visiting Researcher, INSERM, France (2012)

Rebecca McQuaid, MSc by Research (2010/12)

Elham Alshanqaiti, MSc in NanoBio Science UCD (2011/12) 

John Nash, MSc in NanoBio Science UCD (2011/12)

Nicolas Genin (co-supervised by Dr Buchete), MSc in NanoBio Science UCD (2011/12)

Paulina Segovia, visiting PhD student, Cicese Monterrey, Mexico (2010)

Ben Lochocki, Diploma student, Darmstadt Univ. of Applied Sciences, Germany (2010)

Carmen Vela-Garcia, MSc in NanoBio Science UCD (2009/10)

Alexandru Bratu, MSc in NanoBio Science UCD (2008/09)

Current Postgraduate Students

Salihah Qaysi, Doctor of Philosophy (PhD)   -   Thesis Supervisor
Najnin Sharmin, Doctor of Philosophy (PhD)   -   Thesis Supervisor
Alessandra Carmichael Martins, Doctor of Philosophy (PhD)   -   Thesis Supervisor

Teaching

         

Innovation & Leadership

I was coordinator and admissions tutor for an MSc in NanoBio Science 2008-2015 (FT, PT, and Grad Cert). I am current Head of Teaching and Learning in the UCD School of Physics. I contribute to the related pre-MSc and negotiated learning MSc. I have developed project-based learning for first-year students in physics and for international students on the pre-MSc. With the graduate school and international office I am actively involved with the promotion of UCD graduate programmes.

Collaborators

Internal Collaborators

Collaborators within UCD include:

Dr Dominic Zerulla and his research group on surface-plasmon optics

Dr James Rice on non-diffraction-limited imaging

External Collaborators

Dr. Stacey Choi, Ohio State University, USA

Dr. Nathan Doble, Ohio State University, USA 

Prof. Heping Xu, QUB Belfast, UK

Dr Michael Mrochen, IROC Switzerland, on corneal ophthalmics

Prof Colm O'Brien, Mater Misericordiae Hospital, Dublin, Ireland on Ocular Optics

Dr Arthur Cummings, Beacon Hospital, Dublin, Ireland on Ocular Optics

Prof Pablo Artal in LOUM, Murcia University, Spain, on Ocular Optics

Dr Vincent Nourrit, University of Manchester, UK, on Ocular Optics

Prof Sergey Bozhevolnyi, SDU, Odense University, Denmark, on NanoOptics

Dr Victor Coello, Cicese, Mexico, on Plasmonic and NanoOptics