Ophthalmoscopic camera illumination apparatus

Details Ophthalmoscopic camera illumination apparatus Ophthalmoscopic camera illumination apparatus

1997-07-18

1998-12-29

Dang, Hung X.

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

351221, A61B 314

Patent

active

058546685

ABSTRACT:
A compact ophthalmoscopic camera illumination apparatus with which a bright eyeground image can be obtained even for high magnification photography. The camera includes an annular flux forming means that has an entering end (22A) positioned in a vicinity of a light source image, an annular emitting end (22D), a cone-shaped outer reflective surface (22B), and a cone-shaped inner reflective surface (22C); wherein illumination light entering the entering end is reflected on the outer reflective surface and the inner reflective surface, guided to the emitting end, and exits as annular flux from the emitting end. The annular flux passes through the objective lens (1) to form an annular illumination area in the vicinity of the pupil (20) of the patient's eye.

REFERENCES:
patent: 4502766 (1985-03-01), Ito

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