Scanning and detecting optical device

Details Scanning and detecting optical device Scanning and detecting optical device

1989-12-21

1992-04-21

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

358481, H01J 314

Patent

active

051071061

ABSTRACT:
A scanning optical device having a light source for illuminating an examination object such as eyground of a humaneye, a scanning illumination system for scanning and illuminating the examination object with the light, and a light receiving system for guiding the light reflected from the examination object to a light-receiving section. The scanning optical device also has a synchronous signal generating optical system capable of directly guiding the light from the scanning illumination system to the light-receiving section without the intermediary of the examination object, and a synchronizing signal extraction device for separating a synchronizing signal exactly synchronous with the image signal from the signal derived from the light-receiving section.

REFERENCES:
patent: 4190867 (1980-02-01), Ohnishi
patent: 4243294 (1981-01-01), Noguchi
patent: 4447723 (1984-05-01), Neumann
patent: 4616132 (1986-10-01), Kessler
patent: 4719515 (1988-01-01), Miyagawa et al.

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