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Proceedings Paper

Large Aperture Two Mirror Collimator Diamond Machined For Electro-Optical Test
Author(s): James R. Schaffer Jr.; John Casstevens; Samuel R. Lyle Jr.
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Paper Abstract

A two-mirror, off axis Cassegrain telescope was fabricated and assembled for use in making Forward Looking Infrared Receiver (FLIR) to laser boresight measurements. The collimator was designed to operate over two non-coherent bands (0.30<λ<1.10 μm and 8<λ<12 μm) and the coherent 1.06 μm line. The compact multispectral collimator applications include both static and simulated dynamic operating conditions. This paper describes the results of the element, collimator and integration tests associated with the development of this steep diamond machined system. The mirrors were diamond machined out of aluminum that was nickel plated, post polished and hard gold coated. The unobscured aperture is greater than ten inches with an effective focal length of approximately ninety four inches. The large, fast primary mirror, which is an off axis portion of an f/0.37 paraboloid, drove novel fabrication and test methods for the collimator.

Paper Details

Date Published: 11 October 1989
PDF: 12 pages
Proc. SPIE 1113, Reflective Optics II, (11 October 1989);
Show Author Affiliations
James R. Schaffer Jr., Boeing Military Airplanes (United States)
John Casstevens, Optic Electronics Corporation (United States)
Samuel R. Lyle Jr., Optic Electronics Corporation (United States)

Published in SPIE Proceedings Vol. 1113:
Reflective Optics II
Dietrich G. Korsch, Editor(s)

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