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Proceedings Paper

Durable coating for suppressing stray infrared radiation inside optical instruments
Author(s): John N. Pike; Yogesh Mehrotra
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Paper Abstract

Rugged coatings, originally developed for thermographic purposes in the 8-14 (mu) IR band, have been found to be useful as stray-light suppressants in optical instrumentation. Data on the hemispherical diffuse and goniophotometric reflectances of one formulation of this coating are presented. Diffuse reflectance in the 8-14(mu) wavelength region is below 5 percent, and even lower at 3 (mu) . Normal incidence specular reflectance is below 1 percent in the IR, and increases with angle in accordance with theory for physically rough surfaces. The coatings are moderately electrically conducting. They adhere readily to aluminum, silicon, glass, and other substrates; can be handled routinely with no loss of optical properties; have survived 500 degrees F temperatures at Mach 14; and may be modified to give high absorptivity also in the visible region.

Paper Details

Date Published: 28 September 1999
PDF: 6 pages
Proc. SPIE 3786, Optomechanical Engineering and Vibration Control, (28 September 1999); doi: 10.1117/12.363803
Show Author Affiliations
John N. Pike, J.J. Pike & Co., Inc. (United States)
Yogesh Mehrotra, Materials Technologies Corp. (United States)


Published in SPIE Proceedings Vol. 3786:
Optomechanical Engineering and Vibration Control
Eddy A. Derby; Eddy A. Derby; Colin G. Gordon; Colin G. Gordon; Daniel Vukobratovich; Carl H. Zweben; Daniel Vukobratovich; Paul R. Yoder; Carl H. Zweben, Editor(s)

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