05378892 is referenced by 5 patents and cites 21 patents.

An angle filter for restricting the range of light received by a detector functions as a "cold shield" in an infrared optical system. The angle filter either utilizes fiber optics or a thin film technology and reduces the size of an optical system operating in the infrared region while maintaining high system performance. The cold shield/exit pupil configuration of a traditional optical system is replaced by the angle filter.

Title
Angle filter for use in an infrared optical system
Application Number
7/589791
Publication Number
5378892
Application Date
September 28, 1990
Publication Date
January 3, 1995
Inventor
Allan J Lyon
Apopka
FL, US
Alvin J Levy
Orlando
FL, US
Agent
Burns Doane Swecker & Mathis
Assignee
Martin Marietta Corporation
MD, US
IPC
G01J 1/00
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