Automatic focusing apparatus using scanning line weighting of a

Details Automatic focusing apparatus using scanning line weighting of a Automatic focusing apparatus using scanning line weighting of a

1996-08-23

1999-07-27

Ho, Tuan V.

Television

Camera, system and detail

Optics

348349, G03B 1300

Patent

active

059299070

ABSTRACT:
An automatic focusing apparatus to be used for an optical system comprises an image pickup device for picking up an image of the subject supported on a support by way of the optical system and transmitting video signals for the subject, an extracting device for extracting only the video signals corresponding to the pitch of movement of focus adjustment from the signals transmitted from the image pickup device and an in-focus state detecting device for determining the in-focus position of the subject with the area for in-focus detection determined by the pitch setting device and a drive for moving either the support or the optical system for focus adjustment depending on the result of detection of the in-focus state detecting device.

REFERENCES:
patent: 3816651 (1974-06-01), Gardner
patent: 4829374 (1989-05-01), Miyamoto et al.

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