Lens control system

Details Lens control system Lens control system

1993-11-22

1996-12-24

Epps, Georgia Y.

Optical: systems and elements

Lens

With variable magnification

359697, 396 79, 396133, 396147, G02B 1514

Patent

active

055878423

ABSTRACT:
A lens control system is disclosed, which comprises a focusing lens drive for driving a focusing lens for focus control, a zooming lens drive for driving a zooming lens for zooming, a focusing lens position detector for detecting the Position of the focusing lens, a zooming lens position detector for detecting the position of the zooming lens, and a control circuit for controlling, when the zooming lens position detector detects that the zooming lens is in a macro region, the focusing lens drive to stop the focusing lens at a predetermined position.

REFERENCES:
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patent: 4899190 (1990-02-01), Hata
patent: 4975724 (1990-12-01), Hirasawa et al.
patent: 4976523 (1990-12-01), Ishikawa
patent: 4991944 (1991-02-01), Hirao et al.
patent: 5027147 (1991-06-01), Kaneda
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patent: 5060001 (1991-10-01), Kaneda
patent: 5144492 (1992-09-01), Iijima et al.
patent: 5305044 (1994-04-01), Suzuki et al.
T. Maruyama et al., "A Zoom Lens System with New Infrared Auto Focus Mechanism," 8IEEE Transactions on Consumer Electronics, CE-32 (1986) Aug., No. 3, pp. 320-327.

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