Radiant energy – Ionic separation or analysis – Static field-type ion path-bending selecting means
Patent
1991-05-28
1994-10-25
Perkey, W. B.
Radiant energy
Ionic separation or analysis
Static field-type ion path-bending selecting means
2502012, G03B 1336
Patent
active
053593839
ABSTRACT:
A phase difference detection unit for an automatic focusing system of a camera or the like. The phase difference detecting unit includes a pair of linear image pickup devices which receive a pair of optical images of an object formed by the lens in the automatic focusing system of a camera or the like. The detecting unit also has a correlation operating circuit which determines whether or not the lens of the focusing system is in a proper focus condition. The proper focus condition is determined by a minimum correlation value output by the correlation operating circuit, the value being indicative of the correlation between a pair of phase shifted analog electrical signals representative of the optical images received by the pickup devices. The correlation operating circuit is capable of operation at high speed with improved accuracy by maintaining the capacitive loads of the input terminals of the correlation operating circuit.
REFERENCES:
patent: 4926205 (1990-05-01), Miida et al.
patent: 4945377 (1990-07-01), Miida et al.
patent: 5068738 (1991-11-01), Miida
Iwabuchi Hiroshi
Kudoh Yoshimitsu
Miida Takashi
Mutoh Hideki
Fuji Photo Film Co. , Ltd.
Perkey W. B.
LandOfFree
Automatic focusing system with phase difference detecting unit e 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 system with phase difference detecting unit e, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Automatic focusing system with phase difference detecting unit e will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-138793