Photographic diaphragm with two independent sets of leaves

Details Photographic diaphragm with two independent sets of leaves Photographic diaphragm with two independent sets of leaves

1978-06-12

1980-04-22

Hix, L. T.

354272, G03B 906

Patent

active

041992474

ABSTRACT:
A photographic diaphragm of the iris type, having two sets or series of diaphragm leaves instead of the usual single set. Each leaf is relatively narrow in a direction radially with respect to the optical axis, thereby reducing the radial dimensions of the annual space necessary to receive the leaves when the diaphragm is fully open. During a closing down movement to a smaller aperture, both sets or series of diaphragm leaves swing inwardly simultaneously during the first part of a closing movement; then one set of leaves remains stationary while the other set continues to swing inwardly to close the aperture down to as small a size as desired. The two series of leaves are in separate planes slightly spaced from each other in the direction of the optical axis. The diaphragm is preferably of the spring back type, which will spring back automatically to a predetermined aperture after it has been opened wide for focusing purposes.

REFERENCES:
patent: 2944477 (1960-07-01), Tesch
patent: 2949076 (1960-08-01), Finkl

Affiliated with

Also associated with

Rating

Photographic diaphragm with two independent sets of leaves does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Photographic diaphragm with two independent sets of leaves, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Photographic diaphragm with two independent sets of leaves will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1472997