Facsimile and static presentation processing – Facsimile – Recording apparatus
Patent
1989-05-17
1990-11-27
Brinich, Stephen
Facsimile and static presentation processing
Facsimile
Recording apparatus
H04N 5232
Patent
active
049740920
ABSTRACT:
An automatic focusing device for a camera includes a camera section in which an optical lens system having a variable focusing position and a driver for varying the focus of the lens system are built-in. A desired scene is picked up through the lens systems and converted into a video signal by raster scanning. A signal extracting section defines a plurality of sampling points which are arranged in a direction which intersects the scanning lines of the video signal. The signal extracting section receives the video signal and, when the raster scanning reaches any one of the sampling points, extracts and holds the video signal. A computing section is responsive to the held signal for determining a direction in which the focus of the lens system is to be varied. A control section controls the driver on the basis of the determined direction to vary the focus of the lens system in that direction.
REFERENCES:
patent: 4481540 (1984-11-01), Bergen
patent: 4599653 (1986-07-01), Kimura et al.
patent: 4614975 (1986-09-01), Kaite
patent: 4701782 (1987-10-01), Duvent
patent: 4794459 (1988-12-01), Moberg et al.
Kawamura Hisanobu
Nakayama Yoshiaki
Brinich Stephen
Fuji Photo Film Co. , Ltd.
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