Fabrication of a 20.5-inch-diameter segmented silicon annular optic prototype for the ROMA program

Frank R. Hassell; Frank M. Groark

doi:10.1117/12.225281

23 October 1995 Fabrication of a 20.5-inch-diameter segmented silicon annular optic prototype for the ROMA program

Frank R. Hassell, Frank M. Groark

Proceedings Volume 2543, Silicon Carbide Materials for Optics and Precision Structures; (1995) https://doi.org/10.1117/12.225281
Event: SPIE's 1995 International Symposium on Optical Science, Engineering, and Instrumentation, 1995, San Diego, CA, United States

Abstract

Recent advancements in single crystal silicon material science and fabrication capabilities and very low absorption (VLA) multi-layer dielectric coating technology have led to the development of uncooled, large aperture, high power mirrors for high energy laser (HEL) systems. Based on this success, a segmented single-crystal silicon substrate concept has been selected as the baseline fabrication approach for uncooled 1.2 meter diameter resonator annular optics for the Alpha space based high energy laser. The objective of this Resonator Optics Materials Assessment (ROMA) task was to demonstrate all of the key fabrication processes required to fabricate the full sized annular optics for the Alpha space based high energy laser. This paper documents the fabrication of a half-scale annular optic prototype (AOP) of the Alpha laser rear cone.

Citation Download Citation

Frank R. Hassell and Frank M. Groark "Fabrication of a 20.5-inch-diameter segmented silicon annular optic prototype for the ROMA program", Proc. SPIE 2543, Silicon Carbide Materials for Optics and Precision Structures, (23 October 1995); https://doi.org/10.1117/12.225281

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