Radiant energy – Photocells; circuits and apparatus – Photocell controls its own optical systems
Patent
1997-03-17
1998-12-01
Le, Que
Radiant energy
Photocells; circuits and apparatus
Photocell controls its own optical systems
2502017, G01J 120
Patent
active
058442316
ABSTRACT:
An automatic focusing apparatus includes a telephotographic system and a focus detecting device which detects a focus state of a plurality of variable sized, symmetrically shaped focus detecting portions by designating a center of a visual field of the telephotographic system as a center of the focus detecting device. A judging device judges a narrowest focus detecting portion as being effective among the focus detecting portions and which obtains a reliability of at least a predetermined value.
REFERENCES:
patent: 4394569 (1983-07-01), Nakamura
patent: 4485303 (1984-11-01), Suzuki
patent: 4491402 (1985-01-01), Suzuki
patent: 5483318 (1996-01-01), Hamada et al.
patent: 5530514 (1996-06-01), Lisson et al.
patent: 5664236 (1997-09-01), Utagawa
Nakata Masahiro
Suzuki Shin'ichi
Asahi Kogaku Kogyo Kabushiki Kaisha
Le Que
LandOfFree
Automatic focusing apparatus with plural light receiving devices does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Automatic focusing apparatus with plural light receiving devices, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Automatic focusing apparatus with plural light receiving devices will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2397412