Optical multiplex short coherence interferometry on the eye

Details Optical multiplex short coherence interferometry on the eye Optical multiplex short coherence interferometry on the eye

2005-07-26

2005-07-26

Lee, Andrew H. (Department: 2877)

Optics: measuring and testing

By light interference

For dimensional measurement

Reexamination Certificate

active

06922250

ABSTRACT:
The invention is directed to the detection and imaging of the internal geometry of the eye, particularly of the important components for imaging in the eye such as the cornea, lens, vitreous body and retinal surface, by multichannel short coherence interferometry. A method and arrangement for obtaining topograms and tomograms of the eye structure by many simultaneously recorded interferometric depth scans through transversely adjacent points in the pupil using spatially coherent or spatially partially coherent light sources. The depth scan is carried out by changing the optical length of the interferometer measurement arm by means of a retroreflector. By continuously displacing the retroreflector, the z-position of the light-reemitting point in the eye can be determined by means of the occurring interference. It is possible to record depth scans simultaneously through the use of spatially coherent or spatially partially coherent light beams comprising a plurality of partial beams.

REFERENCES:
patent: 6480285 (2002-11-01), Hill
E. Moreno-Barriuso, R. Navarro,J. Opt. Soc. Am. A, vol. 17 (2000): 974-985.
A. F. Fercher and C. K. Hitzenberger,Springer Series in Optical Sciences(ed. T. Asakura), vol. 4, Springer Verlag, Berlin 1999.

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