School of Physical Sciences

En-face OCT

Researchers in the Applied Optics Group were the first to demonstrate en-face images from the retina, now known as C-scans. 
To mark the event, a special brick has been engraved in the Footstep project (part of the new Crab & Winkle Path alongside the Templeman Library in the campus).

pathway

 

brick

 

en-face image



The image was made possible by realising that scattering in combination with a fixed coherence gating, can generate a C-scan. There is no need for an external phase modulator if the object to be imaged is scattering and the image size is sufficiently large. The modulation is, interestingly, created by scanning the beam over the target.

First, we showed that a Newton ring pattern is sampled from the target: A. Gh.Podoleanu, G. M. Dobre, D. J. Webb, D. A. Jackson, Imaging by Use of a Newton Rings Sampling Function" Coherence, Republished in "Selected Papers on Optical Low-Coherence Reflectometry & Tomography, B. R. Masters and B. J. Thompson eds., SPIE Milestone Series, vol. MS165, SPIE Optical Engineering Press, Washington, 2000, USA, pp. 200-202. Opt. Lett., Vol. 21, pp. 1789-1791, (1996).

Then we moved the centre of the Newton rings out from the image centre and sampled the target with a grid of lines:
A. Gh.Podoleanu, G. M. Dobre, D. A. Jackson, En-face Coherence Imaging Using Galvanometer Scanner Modulation, Opt. Letters, (1998), vol. 23, pp. 147-149.

 

J67

A.Gh.Podoleanu
J. A. Rogers
D. A. Jackson

OCT En-face Images from the Retina with Adjustable Depth Resolution in Real Time

IEEE Journal of Selected Topics in Quantum Electron., 1999, Vol.5, No.4, 1176-1184.
http://ieeexplore.ieee.org/search/wrapper.jsp?arnumber=796344
or
http://ieeexplore.ieee.org/iel5/2944/17287/00796344.pdf?tp=&arnumber=796344&isnumber=17287
Impact factor: 3.064

J65

A. Gh.Podoleanu
G. M. Dobre
M. Seeger,
D. J. Webb
D. A. Jackson,
F.W. Fitzke,
A.S. Halfyard

Low Coherence Interferometry for En-face Imaging of the Retina

Lasers and light in ophthalmology, Vol. 8, No. 3, (1998),
pp. 188-192.

J62

A. Gh.Podoleanu
G. M. Dobre
D. A. Jackson

En-face Coherence Imaging Using Galvanometer Scanner Modulation

Opt. Letters, (1998), vol. 23, pp. 147-149.
http://www.opticsinfobase.org/abstract.cfm?id=36537
Imoact factor: 3.2

J61

A. Gh.Podoleanu
M. Seeger,
G. M. Dobre
D. J. Webb
D. A. Jackson,
F. Fitzke

Transversal and Longitudinal Images from the Retina of the Living Eye Using Low Coherence Reflectometry,
Republished in “Selected Papers on Optical Low-Coherence Reflectometry & Tomography”, B. R. Masters and B. J. Thompson eds., SPIE Milestone Series, vol. MS165, SPIE Optical Engineering Press, Washington, 2000, USA, pp. 461-469.

Journal of Biomedical Optics, 3, (1), (1998),
pp. 12-20.
http://www.spie.org/web/journals/jbo/jbo_jan98.html
Impact factor: 3.1

J61 demonstrates for the first time, B-scan OCT images from the retina constructed from T-scans (en-face 1D OCT scans).

School of Physical Sciences, Ingram Building, University of Kent, Canterbury, Kent, CT2 7NH

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Last Updated: 24/08/2015