Diaphragm device

Details Diaphragm device Diaphragm device

1986-06-26

1989-01-10

Mathews, A. A.

354270, 354274, G03B 902

Patent

active

047977000

ABSTRACT:
A diaphragm device including a pair of diaphragm blades movable in opposite directions relatively to each other along a moving line passing through an optical axis of an optical system characterized in that each of the diaphragm blades is provided with an opening of a shape consisting of combination of an arc having a center of curvature located on said moving line and at least one arc having a radius smaller than the above-mentioned arc and having a center of curvature located on said moving line or on a line at right angle to said moving line.

REFERENCES:
patent: 3928859 (1975-12-01), Peterson
patent: 4096495 (1978-06-01), Nesson et al.
patent: 4104653 (1978-08-01), Johnson et al.
patent: 4527876 (1985-07-01), Tanaka et al.

Affiliated with

Also associated with

Rating

Diaphragm device 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, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Diaphragm device will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2110433