Sol-gel coating of composite mirrors to provide a surface for optical figuring

Patrick M. Woida; William F. Hoffmann

doi:10.1117/12.324452

28 August 1998 Sol-gel coating of composite mirrors to provide a surface for optical figuring

Patrick M. Woida, William F. Hoffmann

Proceedings Volume 3356, Space Telescopes and Instruments V; (1998) https://doi.org/10.1117/12.324452
Event: Astronomical Telescopes and Instrumentation, 1998, Kona, HI, United States

Abstract

We have achieved reliable, repeatable coatings of solgel- deposited glass on Carbon Fiber Reinforced Plastic sandwich panel mirrors of sizes 10 to 90 cm. Very lightweight CFRP panels up to 2 meter size have been produced with high thermal and temporal stability, but replicated surface accuracy limited to millimeter applications. The solgel coatings of 20 to 200 micrometers thickness provide a surface which can be optically ground, polished, and figured to provide IR and optical quality mirrors. We have demonstrate this with both flat and concave spherical mirrors.

Citation Download Citation

Patrick M. Woida and William F. Hoffmann "Sol-gel coating of composite mirrors to provide a surface for optical figuring", Proc. SPIE 3356, Space Telescopes and Instruments V, (28 August 1998); https://doi.org/10.1117/12.324452

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