Lens control device for perfoming focusing during lens initializ

Details Lens control device for perfoming focusing during lens initializ Lens control device for perfoming focusing during lens initializ

1993-07-07

1995-06-13

Razavi, Michael T.

Television

Camera, system and detail

Optics

348347, 354402, H04N 5232

Patent

active

054247764

ABSTRACT:
A lens control device for performing focusing during lens initialization includes an axially movable focusing lens, a lens position detector for detecting the position of the lens and a detector for detecting a focus state of the lens on an image pickup plane. The lens control device further includes an initializing circuit which effects an initialization of the lens position detector, a memory circuit which stores the position of the lens at the detection of a focused state on the image pickup plane by the detector during the functioning of the initializing circuit and a control circuit which moves the lens to the position stored in the memory circuit at the completion of the initialization.

REFERENCES:
patent: 5036348 (1991-07-01), Kusaka
patent: 5144491 (1992-09-01), Ushiro et al.

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