This paper proposes an analytical calculational technique for a uniform iris with an aperture of elliptical shape. The purpose of the device is to regulate the depth of sharply imaged space. Anamorphic objectives are not suitable for this, because the depth of field is different in the vertical and horizontal directions. The technique is based on an original theory of envelopes, which in this case considers the working face of the leaf of the iris that coincides with a curve that envelops a family of ellipses that open out to a certain angle relative to the fixed pin of the iris leaf.

PDF Article

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
Login to access OSA Member Subscription