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Wedge Prism Pairs

Photonics Spectra
Jan 2012
Research Electro-Optics Inc. (REO)Request Info
 
REO is offering a family of matched Risley (wedge) prism pairs to enable high-accuracy laser beam steering in military, industrial and instrumentation applications. Beam steering accuracy with the coated optics is dependent upon close matching of the prisms in a pair. The company matches prism pair wedge angles to <0.5 arcsec and bulk material indices of refraction, and controls internal coating layer stresses to guarantee that the deposition process does not degrade the transmitted wavefront performance, which is specified at <λ/10 at 632.8 nm. The Risley prism pairs also feature low scatter, low-loss surfaces with 10-5 scratch-dig surface quality to maximize throughput and laser damage threshold.


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GLOSSARY
coated optics
Optical elements that have been coated with one or more layers of dielectric, or metallic material. These coatings serve to reduce or increase reflection from the surface, and to protect the surfaces from fumes or abrasion. Magnesium fluoride, silicon dioxide, and zinc sulphide are a few of the most commonly used coating materials.
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