Lens position control apparatus

Details Lens position control apparatus Lens position control apparatus

1998-03-20

1999-07-27

Ben, Loha

Optical: systems and elements

Lens

With variable magnification

359697, 396 85, 396104, 396119, 396123, G02B 1514

Patent

active

059300540

ABSTRACT:
A lens position control apparatus includes an absolute position detecting part for detecting the absolute position of a lens, a relative position detecting part for detecting the relative position of the lens, a driving part for driving the lens, and a control part for controlling the driving part to drive the lens to a predetermined position within a driving range of the lens on the basis of an output of the absolute position detecting part and, after that, drive the lens to an end position of the driving range on the basis of an output of the relative position detecting part, so that the lens position control can be promptly initialized.

REFERENCES:
patent: 4861146 (1989-08-01), Hatase et al.
patent: 4881799 (1989-11-01), Ohno et al.
patent: 5130735 (1992-07-01), Husaka et al.
patent: 5134525 (1992-07-01), Kaneda

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