Image pickup apparatus with zooming function

Details Image pickup apparatus with zooming function Image pickup apparatus with zooming function

1993-08-16

1995-05-16

Razavi, Michael T.

Television

Camera, system and detail

Optics

348347, H04N 5232

Patent

active

054165199

ABSTRACT:
There is provided an image pickup apparatus with zooming function, which is equipped with a photoelectric converter for converting an image of an object to be taken by an optical system into an electric signal. The optical system and photoelectric converter are provided as separately slidable on an optical axis. A high frequency component of the electric signal is extracted to determine if the image is in focus by means of level of the high frequency component. Responding to the result of the judgement, the optical system and photoelectric converter are respectively slid to click stop points on the optical axis where the image is in focus.

REFERENCES:
patent: 4748509 (1988-05-01), Otake et al.
patent: 4924317 (1990-05-01), Hirao et al.
patent: 4950054 (1990-08-01), Wada et al.
patent: 5005956 (1991-04-01), Kaneda et al.
patent: 5055932 (1991-10-01), Hijikata

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