Design And Fabrication Of Aluminum Mirrors For A Large Aperture Precision Collimator Operating At Cryogenic Temperatures

Joseph B.C. Fuller Jr.; Paul Forney; Carl M. Klug

doi:10.1117/12.932029

30 December 1981 Design And Fabrication Of Aluminum Mirrors For A Large Aperture Precision Collimator Operating At Cryogenic Temperatures

Joseph B.C. Fuller Jr., Paul Forney, Carl M. Klug

Author Affiliations +

Proceedings Volume 0288, Los Alamos Conf on Optics '81; (1981) https://doi.org/10.1117/12.932029
Event: Los Alamos Conference on Optics, 1981, Los Alamos, United States

Abstract

Contemporary long wavelength infrared (LWIR) sensors, designed for space application, require testing and calibration at cryogenic temperatures for minimization of background noise. Advances in focal plane technology have pushed LWIR sensor optical performance requirements to near diffraction limit thus increasing demands for better test facilities to adequately test and characterize these sensors. It recently became necessary for Lockheed Missiles & Space Company, Inc. (LMSC) to develop a new LWIR sensor test facility. The requirements for this facility were a large unobscured aperture collimator operating with near diffraction limited performance, a mul-tiple source assembly, and two orthogonal scan mirrors (in the collimated beam) all operat-ing at 200 Kelvin in a vacuum tank. A systems engineering approach was used to ensure that the required optical performance would be obtainable at the specified operating temperature. This paper covers the development of the optical system mechanical requirements; the choice of the mirror substrate material; the detail mechanical design and tolerancing of these substrates; their fabrication and testing; and the mounting, alignment, and proposed testing of all the optical elements of the collimator.

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Joseph B.C. Fuller Jr., Paul Forney, and Carl M. Klug "Design And Fabrication Of Aluminum Mirrors For A Large Aperture Precision Collimator Operating At Cryogenic Temperatures", Proc. SPIE 0288, Los Alamos Conf on Optics '81, (30 December 1981); https://doi.org/10.1117/12.932029

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