Request InfoOptical Surfaces Ltd.Optical 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.See full productRelated content from Photonics MediaPRODUCTSPhotonics Spectra October 2022 IssueCompact Beam ExpandersThe A1 series of compact beam expanders from Optical Surfaces Ltd. delivers ×30 magnification from 2-mm aperture high-power laser beam lines. 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