The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 28, 1993
Filed:
Jul. 30, 1992
William Zmek, Naugatuck, CT (US);
Gon-Yen Shen, Brookfield, CT (US);
Hughes Aircraft Company, Los Angeles, CA (US);
Abstract
A procedure for supplying a mirror (22), such as the mirror of an astronomical telescope (60), with holographic optical elements (38), suitable for use with an active mirror alignment system such as a Hartman optical mirror alignment system, is accomplished by constructing each holographic optical element as a separate unitary structure of a transparent substrate (56) with zone plate features. The zone plate features include the channels (64) and ridges (66) of a fragmentary portion of a zone plate etched into a face (58) of the substrate. The substrate is mounted to the mirror by placing the etched face of the holographic optical element in contact with the reflecting surface (68) of the mirror. An adhesive (70) may be applied around the perimeter of the substrate to secure the substrate in its position upon the mirror. This arrangement of mounting the substrate to the mirror protects the etched face of the holographic optical element from environmental damage, and from the stripping and reapplying of a coating during a refurbishing of the mirror.