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Etalon Plates

Photonics.com
Oct 2016
Optical Surfaces Ltd.Request Info
 
KENLEY, England, Oct. 14, 2016 — Etalon PlatesOptical Surfaces Ltd. has announced precision etalon plates for use in Fabry-Perot interferometers.

Etalons are available in air-spaced or solid forms. Designed for use at customer-defined wavelengths within the range of 190 nm to about 2 μm, the etalons are supplied with wedge angles of 5 minutes of arc for smaller diameters, rising in steps to a wedge angle of 40 minutes of arc for diameters greater than 70 mm.

The plates are available as standard with UV-grade silica and germanium.


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GLOSSARY
Fabry-Perot interferometer
A multiple-beam interferometer, usually consisting of two flat plates, with high reflective ability. The plates are set parallel to one another by spacers so that lightwaves may bounce back and forth between them several times. The requirements for constructive interference of reflected lightwaves of a given wavelength can be fulfilled only at particular angles, relative to the normal to the plates. Therefore, Fabry-Perot interferometers can be used as spectrometers with high resolution. Used...
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