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. 17, 1991
Filed:
May. 03, 1989
Graham W Flint, Albuquerque, NM (US);
Martin Marietta Corporation, Bethesda, MD (US);
Abstract
An optical element having a thin, transparent plate containing a plurality of shallow cooling channels, and a transparent substrate immediately behind the plate with a plurality of inlet and exhaust ducts underlying and in fluid communication with coolant being circulated through the cooling channels of the plate. In use, the optical element may be configured as a beam splitter, mirror, or aperture sharing device by applying a coating that is at least partially reflective to the face plate of the element. Alternatively, if used as a window or refractive element, the above cooling structure can be applied to both faces of the element. Optical distortion can be further reduced by using a coolant having a refractive index matching that of the substrate.