Measurement Of Angular Response Of Space Telescopes

R. E. Zirkle; R. P. Heinisch

doi:10.1117/12.964607

26 September 1977 Measurement Of Angular Response Of Space Telescopes

R. E. Zirkle, R. P. Heinisch

Proceedings Volume 0107, Stray Light Problems in Optical Systems; (1977) https://doi.org/10.1117/12.964607
Event: 1977 SPIE/SPSE Technical Symposium East, 1977, Reston, United States

Abstract

The angular response of LWIR telescopes is measured to verify predicted off-axis rejection (OAR) performance. The data are also useful to guide any necessary modifications for performance improvement. The off-axis response must be 9 to 12 bels (orders of magnitude) below the on-axis maximum response to reject the influence of strong off-axis sources. Collimated lasers serve as the strong, highly directional test sources required in the characterization measurements. Carefully used optical attenuators permit the application of detectors which can normally cover only 4 or 5 bels. This paper describes the apparatus and methods employed in measuring the OAR of specific telescopes at wavelengths of 1. 06 and 10. 6 4m. Illustrative data are given for telescopes built by Honeywell under the sponsorship of Air Force Geophysical Laboratories.

Citation Download Citation

R. E. Zirkle and R. P. Heinisch "Measurement Of Angular Response Of Space Telescopes", Proc. SPIE 0107, Stray Light Problems in Optical Systems, (26 September 1977); https://doi.org/10.1117/12.964607

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