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Proceedings Paper

Computational model to configure the AEDC 7V chamber optical system and to simulate the measured optical performance
Author(s): James D. Selman Jr.
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Paper Abstract

Refurbishment of the Arnold Engineering Development Center (AEDC) 7V high-vacuum cryogenic chamber has recently been completed. This chamber now provides a high-fidelity ground calibration and test facility for infrared surveillance sensors and infrared seekers. Although the chamber optical system was originally designed for diffraction-limited performance in the MWIR to LWIR wavebands, its actual performance allows near diffraction-limited testing into the SWIR over a 20-mrad-square field of view. With a test pupil diameter of 50 cm, 20 K temperature capability, multiple blackbody targets, excellent vibration isolation, exceptional optical performance, and supporting analysis capability, the AEDC 7V is a premier space environmental chamber capable of meeting sensor/seeker ground test requirements well into the next century. Optical collimation of the blackbody sources is provided by a long focal length, unobscured cassegrain. Installation, alignment, and performance testing of the all-metal cassegrain in the chamber were achieved early in 1994. This paper reviews the computational procedures required: (1) to define the final ground test configuration and system alignment after installation of the cassegrain; and (2) to create a computational model that reproduces the interferometrically measured wavefront performance of the installed collimator.

Paper Details

Date Published: 22 May 1995
PDF: 10 pages
Proc. SPIE 2470, Infrared Imaging Systems: Design, Analysis, Modeling, and Testing VI, (22 May 1995); doi: 10.1117/12.210061
Show Author Affiliations
James D. Selman Jr., Micro Craft Technology, Inc. (United States)

Published in SPIE Proceedings Vol. 2470:
Infrared Imaging Systems: Design, Analysis, Modeling, and Testing VI
Gerald C. Holst, Editor(s)

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