Physics – Optics
Scientific paper
Oct 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990spie.1303..458r&link_type=abstract
IN: Advances in optical structure systems; Proceedings of the Meeting, Orlando, FL, Apr. 16-19, 1990 (A91-36651 15-74). Bellingh
Physics
Optics
Electro-Optics, Graphite-Epoxy Composites, Optical Measuring Instruments, Test Equipment, Thermal Expansion, Honeycomb Structures, Materials Tests, Temperature Dependence
Scientific paper
The paper deals with the feasibility study and use of advanced composite materials in the Low Altitude Navigation and Targeting Infrared for Night (LANTIRN) program's field-test equipment. Emphasis is placed on thermal expansion in the optical test-equipment structure under elevated-temperature conditions. A design approach using a low-CTE graphite/epoxy composite for the optical bed is considered, and based on several constraints, four basic design approaches are evaluated: honeycomb, separated plate, machine solid, and thin solid. A prototype system is covered, and the test results of coupon samples of the composite baseplate material indicate that CTE is less than 1 ppm/deg C over a wide temperature range.
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