Radiant energy – Ionic separation or analysis – Static field-type ion path-bending selecting means
Patent
1992-06-05
1993-12-14
Perkey, W. B.
Radiant energy
Ionic separation or analysis
Static field-type ion path-bending selecting means
2502012, G03B 1336
Patent
active
052707636
ABSTRACT:
An auto-focusing device for stably drive a photographing lens to track a moving object comprises charge accumulation type photo-electric conversion means for accumulating charges at a predetermined time interval to produce a focus detection signal, defocus amount calculation means for calculating a defocus amount of the photographing lens based on the focus detection signal, drive distance calculation means for calculating a direction and a distance of the lens drive for driving the photographing lens to track the moving object based on at least the defocus amount, drive means for driving the photographing lens in accordance with the calculated direction and distance of the lens drive, and control means for supplying the direction and distance of the lens drive calculated by the drive distance calculation means to the drive means after the end of the next charge accumulation by the photo-electric conversion means to drive the photographing lens so that the photographing lens tracks the moving object.
REFERENCES:
patent: 4783677 (1988-11-01), Hamada et al.
patent: 4969003 (1990-11-01), Ohnuki et al.
Patent Abstracts of Japan, vol. 9, No. 129 (P-361) Jun. 5, 1985.
Patent Abstracts of Japan, vol. 14, No. 389 (P-1095), Aug. 22, 1990.
Nikon Corporation
Perkey W. B.
LandOfFree
Auto-focusing device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Auto-focusing device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Auto-focusing device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1709601