Radiant energy – Photocells; circuits and apparatus – Photocell controls its own optical systems
Patent
1989-01-23
1991-04-02
Miller, Stanley D.
Radiant energy
Photocells; circuits and apparatus
Photocell controls its own optical systems
250216, 350331R, 350347V, 354406, 354407, 354408, G01J 120, H01J 314, G02F 113, G03B 300
Patent
active
050049020
ABSTRACT:
The focussed point detecting optical system comprises an objective lens, a pair of reimaging lenses arranged on the side opposite to the objective lens at a location apart from the imaging plane of the objective lens, and a variable refractive index optical element arranged in the vicinity of said imaging plane so as to have, as a plane of symmetry, the plane including the optical axis of the objective lens and perpendicular to the straight line passing through the centers of said pair of reimaging lenses. This focussed point detecting optical system permits changing base length and is capable of favorably detecting focussed points of lenses having various F number. The variable refractive index optical element is a liquid crystal prism so composed as to permit varying voltage to be applied.
REFERENCES:
patent: 4029393 (1977-06-01), Dungan et al.
patent: 4190343 (1980-02-01), Wagensonner
patent: 4641922 (1987-02-01), Jacob
patent: 4721975 (1988-01-01), Hamada
patent: 4728785 (1988-03-01), Ohnuki et al.
patent: 4729641 (1988-03-01), Matsuoka et al.
patent: 4743932 (1988-05-01), Matsui
patent: 4794416 (1988-12-01), Mukai et al.
patent: 4849782 (1989-07-01), Koyama et al.
patent: 4855777 (1989-08-01), Suda et al.
Matsui Hiroshi
Toda Akitoshi
Gross Anita Pellman
Miller Stanley D.
Olympus Optical Co,. Ltd.
LandOfFree
Focused point detecting optical system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Focused point detecting optical system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Focused point detecting optical system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-328101