Physics – Optics
Scientific paper
Oct 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989spie.1113..265s&link_type=abstract
IN: Reflective optics II; Proceedings of the Meeting, Orlando, FL, Mar. 27-29, 1989 (A90-39027 17-74). Bellingham, WA, Society o
Physics
Optics
Apertures, Collimators, Electro-Optics, Infrared Instruments, Mirrors, Cassegrain Optics, Design Analysis, Diamonds, Fabrication
Scientific paper
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 noncoherent bands and the coherent 1.06-micron 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, postpolished, 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.
Casstevens John
Lyle Samuel R. Jr.
Schaffer James R. Jr.
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