Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – Objective type
Patent
1996-04-09
1998-07-21
Mai, Huy
Optics: eye examining, vision testing and correcting
Eye examining or testing instrument
Objective type
351206, 351215, A61B 310, A61B 314
Patent
active
057841489
ABSTRACT:
A scanning laser ophthalmoscope with a wide field of view provides a color image of an interior portion of a patient's eye at varying depths while the patient is simultaneously presented with a fixation target designed to probe his visual function. The scanning laser ophthalmoscope includes an illumination system, a capturing and detection system and a target image generating system wherein the optical paths of each of these systems is separated by one or more beam splitters to prevent a chief ray from the patient's eye from being blocked so as to eliminate shading off effects in the captured image. A simplified scanning system is employed that includes only one scanner with a moveable reflective surface. A passive, stationary optical element is employed to generate a line of light from a point of light that impinges on the optical element, the line of light being scanned in a direction perpendicular to the line by the single scanner.
REFERENCES:
patent: 4579430 (1986-04-01), Bille
patent: 4781453 (1988-11-01), Kobayashi
patent: 5090798 (1992-02-01), Kohayakawa
patent: 5537162 (1996-07-01), Hellmuth et al.
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