Method and apparatus for optical coherence tomographic fundus im

Details Method and apparatus for optical coherence tomographic fundus im Method and apparatus for optical coherence tomographic fundus im

1993-12-17

1996-07-16

Sikes, William L.

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

351211, 351221, A61B 314

Patent

active

055371620

ABSTRACT:
Apparatus for illuminating the fundus of an eye with a scanned sample beam of radiation, the scanned sample beam emerging from a beam scanner which is exposed to a sample beam, which apparatus is for use in optical coherence tomography. An embodiment of the apparatus includes: (a) scanner lens and a beamsplitter for transferring radiation from the scanned sample beam, including chief rays of the sample beam which emerge from a point of final deflection of the beam scanner, and (b) a lens for focusing the transferred radiation so that the scanned sample beam is focused onto the fundus by the eye. In accordance with the invention the scanner lens is fixed with respect to the beam scanner so that the point of final deflection is located substantially in the back focal plane of the scanner lens and the scanner lens is movable.

REFERENCES:
patent: 4406542 (1983-09-01), Boggy et al.
patent: 4900144 (1990-02-01), Kobayashi
"Feurtosecond Optical Ranging in Biological Systems" by J. G. Fujimoto et al. Optics Letters, vol. 10, No. 3, Mar. 1986, pp. 150-152.
"New Measurement System for Fault Location in Optical Waveguide Devices Based on Interferometric Technique" by K. Takada et al. Applied Optics, vol. 26, No. 9, May 1, 1987, pp. 1603-1606.
Section 7.5.8 of "Principles of Optics" 6th Edition, M. Born and E. Wolf, Pergamon Press, New York (1986) (No Month).
"Optical Coherence Tomography" by Huang et al., Science, 254, Nov., 22, 1991, pp. 1178-1181.
Ph.D. thesis "Optical Coherence Tomography" David Huang, Massachusetts Institute of Technology, May, 1993.

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