Lens drive controller and apparatus provided with drive controll

Details Lens drive controller and apparatus provided with drive controll Lens drive controller and apparatus provided with drive controll

1998-06-08

1999-10-26

Ben, Loha

Optical: systems and elements

Lens

With variable magnification

359695, 359813, 359824, 396 52, 396 72, G02B 1514

Patent

active

059738561

ABSTRACT:
A controller determines the presence/absence of change in focal length caused by a zooming operation, and determines the necessity of correcting image plane shift caused by said change in focal length. Blur correction is prohibited when executing correction of image plane shift, and image plane shift is corrected by calculating the amount of movement of the focusing lens based on set focal length information, current position information of the focusing lens, and correction information stored in memory. When correction is unnecessary, the controller determines blur correction is permitted when the drive of the focusing lens ends, and executes the correction. The blur correction and the image plane shift correction are not executed simultaneously.

REFERENCES:
patent: 5448413 (1995-09-01), Kobayashi et al.
patent: 5684640 (1997-11-01), Tanaka et al.
patent: 5742435 (1998-04-01), Nagashima et al.

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