Material characterization of beryllium mirrors exhibiting anomalous scatter

Charles M. Egert

doi:10.1117/12.50506

1 December 1991 Material characterization of beryllium mirrors exhibiting anomalous scatter

Charles M. Egert

Proceedings Volume 1530, Optical Scatter: Applications, Measurement, and Theory; (1991) https://doi.org/10.1117/12.50506
Event: San Diego, '91, 1991, San Diego, CA, United States

Abstract

To understand the origin of anomalous scatter it is necessary to consider materials-related features which might be responsible for this anomalous behavior. In this study, a variety of material characteristics of a subset of the beryllium mirrors used in an investigation of anomalous scatter by Stover et. al. (1989) is presented, including the near-surface chemical composition, grain size, surface particulate density, and ultraviolet-visible reflectance values. These material characteristics are compared with the anomalous scatter level reported by Stover for the same mirrors. One mirror (B-85), which exhibits a high level of anomalous scatter, was found to have larger grain size (about 28 microns) and a high density of localized surface porosity, compared to other mirror samples with lower levels of anomalous scatter.

Citation Download Citation

Charles M. Egert "Material characterization of beryllium mirrors exhibiting anomalous scatter", Proc. SPIE 1530, Optical Scatter: Applications, Measurement, and Theory, (1 December 1991); https://doi.org/10.1117/12.50506

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