Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – Objective type
Patent
1991-04-08
1992-02-18
Bovernick, Rodney B.
Optics: eye examining, vision testing and correcting
Eye examining or testing instrument
Objective type
351205, A61B 310
Patent
active
050888110
ABSTRACT:
A laser beam scanning type eye fundus observing device has a scanning optical system for scanning and illuminating an eye fundus with a laser beam spot and an observation image of the eye fundus is built up in accordance with a reflecting light of the scanning laser beam from various portions of the eye fundus. The laser beam scanning type eye fundus observing device further has an output level regulator for automatically regulating an output level of an image signal in accordance with a light quantity information of the various portions of the eye fundus.
REFERENCES:
patent: 4213678 (1980-07-01), Pomerantzeff
patent: 4877321 (1989-10-01), Ichihashi et al.
Hideshima Masayuki
Sekine Akihiko
Wada Shinji
Bovernick Rodney B.
Kabushiki Kaisha Topcon
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