Slit lamp and accessory device thereof

Details Slit lamp and accessory device thereof Slit lamp and accessory device thereof

1985-01-29

1987-12-08

Corbin, John K.

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

351206, A61B 314, A61B 310

Patent

active

047115416

ABSTRACT:
A slit lamp comprising a slit light projection optical system having a slit aperture for projecting a slit pattern light along a slit plane to a crystalline lens of a patient's eye and a microscope for observing a section of the crystalline lens which is illuminated by the slit pattern light. The microscope comprises an crystalline lens section recording optical system including a recording device having an image plane for recording the section of the crystalline lens of the patient's eye illuminated by the slit pattern light, and a retroillumination image recording optical system for guiding a retroillumination image of the crystalline lens to the recording device of the crystalline lens section recording optical system for recording the section of the crystalline lens. The crystalline lens section recording optical system including an imaging optical system having a principal plane which intersects an extension of the image plane of the recording device in an extension plan including the slit aperture and the projection optical axis of the slit light projection optical.

REFERENCES:
patent: 4331392 (1982-05-01), Sato
patent: 4468104 (1984-08-01), Nunokawa
Rinsho Ganka, "Retro-Illumination Photography of Cataractous Lens", vol. 32, No. 6 (Jun. 1978), pp. 973-976.
Nippon Ganka Gakkai Zasshi (Japan Opthalologic Institute Journal), vol. 62, No. 4, 4/10/58, pp. 22-(380)-26(384).

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