Aperture stop control device for a zoom lens system

Details Aperture stop control device for a zoom lens system Aperture stop control device for a zoom lens system

1978-01-24

1979-07-03

Sacher, Paul A.

350205, 354196, 354271, G02B 1514

Patent

active

041598644

ABSTRACT:
An aperture stop control device for a zoom lens system includes a variable aperture stop, a first sensor for determining the diameter of the aperture stop and providing a first electrical signal representative of the diameter of the aperture stop means and a second sensor for generating a second electrical signal indicative of a designated F number. A signal generator provides a third electrical signal indicative of the focal length of the zoom lens system. A computing circuit computes an output electrical signal as a function of the second and third electrical signals to control the diameter of the aperture stop for automatically maintaining a designated F number during a zooming operation.

REFERENCES:
patent: 3889282 (1975-06-01), Hashimoto
patent: 4043642 (1977-08-01), Hirose et al.

Affiliated with

Also associated with

Rating

Aperture stop control device for a zoom lens system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Aperture stop control device for a zoom lens system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Aperture stop control device for a zoom lens system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2273685