Scanning laser ophthalmoscope

Details Scanning laser ophthalmoscope Scanning laser ophthalmoscope

1994-03-10

1995-07-04

Sikes, William L.

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

351206, A61B 310

Patent

active

054305098

ABSTRACT:
A laser beam emitted by a laser light source is scanned in a series of small, high-speed oscillations in a first scanning direction by an acousto-optical deflector, and scanned at a lower frequency in a second direction perpendicular to the first scanning direction by a vibration mirror galvanometer, and scanned at yet a lower frequency in a third direction, parallel to the first direction, by a mirror galvanometer in order to enable high-precision scanning, and is projected onto a prescribed region of an eye. Light reflected by the eye passes, via the mirror galvanometers and, through a confocal optical aperture and is converted to an electrical signal by a photosensor. The signal is then converted by a signal processor to a standard television line format.

REFERENCES:
patent: 4781453 (1988-11-01), Kobayashi

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