Thermal Stability Of Beryllium Mirrors

Iwao P. Adachi; Don Williams

doi:10.1117/12.967450

1 January 1987 Thermal Stability Of Beryllium Mirrors

Iwao P. Adachi, Don Williams

Proceedings Volume 0818, Current Developments in Optical Engineering II; (1987) https://doi.org/10.1117/12.967450
Event: 31st Annual Technical Symposium on Optical and Optoelectronic Applied Sciences and Engineering, 1987, San Diego, CA, United States

Abstract

Beryllium mirrors have shown excellent stability over a wide range of thermal conditions. Experiments were conducted using flat mirrors which remained flat from room temperature down to 89 degrees K. LUPI interferometer measurements confirmed calculated data. The surface was monitored during the thermal cycle from room temperature to 89°K. The results have good agreement with calculation. For a spherical mirror, the radius of curvature changes as predicted. For an elliptical mirror, the radius of curvature at the vertex changed but eccentricity remained the same.

Citation Download Citation

Iwao P. Adachi and Don Williams "Thermal Stability Of Beryllium Mirrors", Proc. SPIE 0818, Current Developments in Optical Engineering II, (1 January 1987); https://doi.org/10.1117/12.967450

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