Diaphragm device having full-open aperture diameter electrically

Details Diaphragm device having full-open aperture diameter electrically Diaphragm device having full-open aperture diameter electrically

1994-04-28

2000-11-28

Gray, David M.

Photography

Exposure control system responsive to focal length

Control of full open aperture value

348363, G03B 700

Patent

active

061546135

ABSTRACT:
An optical apparatus having a diaphragm device required to have the full-open aperture thereof varied according to zooming includes a zoom detection part for detecting the state of zooming, the diaphragm device including a motor serving as a drive source to drive a diaphragm member for varying the aperture diameter thereof, and a control circuit arranged to vary the full-open aperture diameter by driving the motor of the diaphragm device on the basis of detection information provided by the zoom detection part.

REFERENCES:
patent: 4159864 (1979-07-01), Yasukuni et al.
patent: 4636041 (1987-01-01), Kotaka et al.
patent: 4841327 (1989-06-01), Yamamoto et al.
patent: 4896177 (1990-01-01), Kazami et al.
patent: 5073790 (1991-12-01), Ogawa
patent: 5122822 (1992-06-01), Morisawa et al.
patent: 5146259 (1992-09-01), Kobayashi et al.
patent: 5278605 (1994-01-01), Satoh

Affiliated with

Also associated with

Rating

Diaphragm device having full-open aperture diameter electrically does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Diaphragm device having full-open aperture diameter electrically, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Diaphragm device having full-open aperture diameter electrically will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1734150