Advanced Lightweight Beryllium Mirrors

Roger A. Paquin; Harold Levenstein; Lynn Altadonna; Gerald Gould

doi:10.1117/12.935017

3 October 1983 Advanced Lightweight Beryllium Mirrors

Roger A. Paquin, Harold Levenstein, Lynn Altadonna, Gerald Gould

Proceedings Volume 0389, Optical Systems Engineering III; (1983) https://doi.org/10.1117/12.935017
Event: 1983 Los Angeles Technical Symposium, 1983, Los Angeles, United States

Abstract

Perkin-Elmer fabricated two 9.5-inch diameter beryllium mirror blanks using an advanced powder metallurgy process to produce a monolithic, lightweight structure with honeycomb interior weighing 2.16 pounds. The new beryllium material exhibits improved isotropy as measured by x-ray diffraction techniques. The mechanical properties meet or exceed the published values for commercially available vacuum hot pressed beryllium block. In addition, the material is readily polished to good figure and surface quality and has demonstrated potential for lower scatter than standard material. The monolithic sandwich construction demonstrated in the program is exceptionally stiff, permitting large lightweight mirrors to be constructed. A scaled-up 36-inch diameter mirror would weigh only 31 pounds using the technology demonstrated in the project. It is estimated that with minor modification in the process this weight could be halved.

Citation Download Citation

Roger A. Paquin, Harold Levenstein, Lynn Altadonna, and Gerald Gould "Advanced Lightweight Beryllium Mirrors", Proc. SPIE 0389, Optical Systems Engineering III, (3 October 1983); https://doi.org/10.1117/12.935017

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