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Proceedings Paper

Doppler Laser Interferometry And Low Expansion Materials - A Merging Of Technologies
Author(s): Robert F. Karlak; Dave F Hotz; Alan K Haas
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Paper Abstract

An extremely sensitive, accurate, and versatile extensometer has been demonstrated for measuring minute thermally induced dimensional changes in large structures fabricated from materials with a near-zero, but difficult to predict, coefficient of thermal expansion (CTE) -such as laminated graphite-epoxy composites. The method employs a commercially available Doppler laser interferometer designed for extremely accurate translation measurements in large machine tools. Operation of the laser device is described together with the special precautions required, and results of thermally cycling a near-zero CTE graphite-epoxy I-beam.

Paper Details

Date Published: 11 July 1989
PDF: 6 pages
Proc. SPIE 1044, Optomechanical Design of Laser Transmitters and Receivers, (11 July 1989); doi: 10.1117/12.951296
Show Author Affiliations
Robert F. Karlak, Lockheed Missiles and Space Company (United States)
Dave F Hotz, Lockheed Missiles and Space Company (United States)
Alan K Haas, Lockheed Missiles and Space Company (United States)


Published in SPIE Proceedings Vol. 1044:
Optomechanical Design of Laser Transmitters and Receivers
Bernard D. Seery, Editor(s)

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