Protected silver coating for astronomical mirrors

Norman L. Thomas; Jesse D. Wolfe; Joseph C. Farmer

doi:10.1117/12.319243

25 August 1998 Protected silver coating for astronomical mirrors

Norman L. Thomas, Jesse D. Wolfe, Joseph C. Farmer

Proceedings Volume 3352, Advanced Technology Optical/IR Telescopes VI; (1998) https://doi.org/10.1117/12.319243
Event: Astronomical Telescopes and Instrumentation, 1998, Kona, HI, United States

Abstract

A durable protected silver coating was designed and fabricated for use on flashlamp reflectors in the National Ignition Facility to avoid tarnishing under corrosive conditions and intense visible light. This coating provides a valuable alternative for telescope mirror coatings where high reflectance and durability are important requirements. This paper describes a protected silver coating having high reflectance from 400 mm to 10,000 nm. An alternate coating design extends the high reflectance down to 300 nm while maintaining high reflectance out to 10,000 nm. The specular reflectance is between 95% and 97% in the visible region and 98% or better in the infrared region.

Citation Download Citation

Norman L. Thomas, Jesse D. Wolfe, and Joseph C. Farmer "Protected silver coating for astronomical mirrors", Proc. SPIE 3352, Advanced Technology Optical/IR Telescopes VI, (25 August 1998); https://doi.org/10.1117/12.319243

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