Movable optical member control device in optical apparatus havin

Details Movable optical member control device in optical apparatus havin Movable optical member control device in optical apparatus havin

1997-03-17

1998-11-03

Lee, Eddie C.

Photography

Having variable focal length of camera objective

Power zoom

396 87, 396131, 396135, 348345, G03B 1334

Patent

active

058323180

ABSTRACT:
A driving device includes a movable object, a driving part for moving the object, a manual operation member, a pulse generator for generating a plurality of pulses successively according to an operation of the operation member with pulse intervals varying depending on its operation speed, a data forming part for forming a plurality of data on the basis of the plurality of pulses successively according to the pulse intervals, a storage part for storing successively the plurality of data and a reading part for reading out the stored plurality of data successively and determining a drive parameter for each of the read out data corresponding to the speed for moving the object by the driving part by using the data value. The timing for reading out subsequent data is set after completion of the movement of the object on the basis of a prior data value.

REFERENCES:
patent: 4972215 (1990-11-01), Kitamura et al.
patent: 5422694 (1995-06-01), Yoshida et al.
patent: 5450161 (1995-09-01), Ichinose

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