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Silver Coatings

Photonics.com
Jul 2007
Princeton InstrumentsRequest Info
 
prot_silver.jpgPrinceton Instruments has introduced protected and enhanced silver coatings for diamond-turned optics and glass. This addition to its Acton Optics product line offers durability and reflectance for applications including military optics, telescopes, spaceflight hardware, analytic instruments and ultrafast Ti:sapphire lasers.

These robust coatings exceed the requirements of MIL-M-13508, pass the saltwater immersion test of Mil-F-48616 and perform to specifications after rigorous testing under conditions including humidity, temperature, adhesion, abrasion and solubility.

Mark Dykstra, business manager at Acton Optics, said, “These dependable coatings can be manufactured to provide greater than 98-percent average reflectance over very broad bandwidths and on a variety of substrates. This newly developed coating protects diamond turned optics from scratches and corrosion, overcoming a historic weakness with these delicate metallic surfaces.”

These proprietary coatings offer high performance in visible and infrared wavelengths simultaneously and are suitable for reflectivity from 500 nm to 2 μm. The performance can easily be extended to 20 μm and beyond.

The longevity of the silver mirror is maximized by the precise deposition of proprietary binder layers and dielectric overcoat layers, carefully selected based on substrate choice and application. This process provides the mirrors with longevity and allows them to be cleaned at the point of use, even in the harshest environments.


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GLOSSARY
glass
A noncrystalline, inorganic mixture of various metallic oxides fused by heating with glassifiers such as silica, or boric or phosphoric oxides. Common window or bottle glass is a mixture of soda, lime and sand, melted and cast, rolled or blown to shape. Most glasses are transparent in the visible spectrum and up to about 2.5 µm in the infrared, but some are opaque such as natural obsidian; these are, nevertheless, useful as mirror blanks. Traces of some elements such as cobalt, copper and...
photonics
The technology of generating and harnessing light and other forms of radiant energy whose quantum unit is the photon. The science includes light emission, transmission, deflection, amplification and detection by optical components and instruments, lasers and other light sources, fiber optics, electro-optical instrumentation, related hardware and electronics, and sophisticated systems. The range of applications of photonics extends from energy generation to detection to communications and...
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