Control method of a zoom lens camera

Details Control method of a zoom lens camera Control method of a zoom lens camera

1997-01-09

1998-05-05

Adams, Russell E.

Photography

Having variable focal length of camera objective

Power zoom

396 72, 396 79, 396 85, 359696, G03B 1700

Patent

active

057489971

ABSTRACT:
A control method of a zoom lens camera comprising a lens system having a movable front lens group and a movable rear lens group, a first motor for moving the front lens group, a second motor for moving the rear lens group, a first pulse encoder which is adapted to control the angular position of the first motor and a second pulse encoder which is adapted to control the angular position of the second motor. In such a zoom lens camera. the difference in the image plane position between the wide-angle position and the telephoto position is measured to obtain the necessary number of drive pulses for the motors, so that the zoom adjustment and the fB adjustment can be carried out without need of a mechanical zoom adjustment or a mechanical fB adjustment.

REFERENCES:
patent: 4936664 (1990-06-01), Haraguchi et al.
patent: 5173807 (1992-12-01), Kaneda et al.
patent: 5189559 (1993-02-01), Kaneko
patent: 5276318 (1994-01-01), Hirasawa
patent: 5392159 (1995-02-01), Sasaki et al.
United Kingdom Serach Report.

Affiliated with

Also associated with

Rating

Control method of a zoom lens camera does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Control method of a zoom lens camera, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Control method of a zoom lens camera will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-71007