For over two decades Denton's FSS99 has been the benchmark for protected silver coatings used in telescopes, space-flight systems and military optics. In recent years we have added several enhancements and options to provide a wide choice of coatings for different applications. The top layers are tailored for spectral performance, as indicated by the numerical designation. For example, FSS99-500 has peak reflectance at 500nm in the visible, FSS99-106 is optimized for 1.06um. Adhesion layers under the silver are customized to match the substrate. Good adhesion and durability are realized on materials such as glass, nickel, diamond turned aluminum, or polished beryllium. All FSS99 coatings pass the adhesion, abrasion, temperature and humidity requirements of MIL-M-13508.
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