Television – Camera – system and detail – Optics
Patent
1994-08-02
1995-08-29
Adams, Russell E.
Television
Camera, system and detail
Optics
348354, 354400, 354402, G03B 1336, H04N 5232
Patent
active
054464943
ABSTRACT:
A focus detecting system for effecting automatic focusing by detecting the in-focus position of a focusing lens and driving the focusing lens to this position. This system has a signal processing means supplied with a video signal from image pick-up means to output a signal related to the in-focus state, a detection means for detecting the position of a focusing lens for forming an image in the image pick-up means, when the signal output from the signal processing means is processed, and a calculating means for calculating the presupposed in-focus position of the focusing lens from at least two groups of items of data on the signal outputted from the signal processing means and on the position of the focusing lens supplied from the detection means. Each time the deviation of the present position of the focusing lens from the presupposed in-focus position is calculated, the focusing lens is driven to move to an extent smaller than the deviation, thus being focused.
REFERENCES:
patent: 3896304 (1975-07-01), Aoki et al.
patent: 4392726 (1983-07-01), Kimura
patent: 4445761 (1984-05-01), Ishikawa et al.
patent: 4473287 (1984-09-01), Fukuhara et al.
patent: 4477167 (1984-10-01), Ishikawa et al.
patent: 4500925 (1985-02-01), Hanma et al.
patent: 4717959 (1988-01-01), Isago
patent: 4748509 (1988-05-01), Otake et al.
patent: 4762986 (1988-08-01), Suda et al.
patent: 5204749 (1993-04-01), Toyama et al.
Iwasaki Youichi
Kaneda Naoya
Suda Hirofumi
Toyama Masamichi
Ueda Kouichi
Adams Russell E.
Canon Kabushiki Kaisha
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