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Proceedings Paper

Effective surface PSD for bare hot-isostatic-pressed beryllium mirrors
Author(s): Cynthia L. Vernold; James E. Harvey
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Paper Abstract

Our understanding of the relationship between optical surlace topography and scattering behavior has improved in recent years to the point where the scattering characteristics of optical systems are routinely controlled by placing specifications upon the root-mean--square (rms) surface roughness. Bare polished hot isostatic pressed (HIP) beryllium (Be) has consistently failed to obey the established topographic surface scatter models. Surface scatter in the form of the Bidirectional Reflectance Distribution Function (BRDF) from bare beryllium mirrors using several test wavelengths will be presented in this paper. This experimental data indicates that non-topographic scattering effects are significant for bare beryllium mirrors. An empirical "effective" surface power spectral density (PSD) function will be developed that can be used to predict the scattering behavior of bare polished HIP Be from topographic rms surface roughness data.

Paper Details

Date Published: 1 December 1991
PDF: 6 pages
Proc. SPIE 1530, Optical Scatter: Applications, Measurement, and Theory, (1 December 1991); doi: 10.1117/12.50504
Show Author Affiliations
Cynthia L. Vernold, Hughes Danbury Optical Systems, Inc. (United States)
James E. Harvey, CREOL/Univ. of Central Florida (United States)

Published in SPIE Proceedings Vol. 1530:
Optical Scatter: Applications, Measurement, and Theory
John C. Stover, Editor(s)

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