Request InfoIridian Spectral TechnologiesIridian Spectral Technologies Ltd. has unveiled a line of ultrasteep short-pass edge filters for Raman spectroscopy applications. Available at 514.5, 532, 633 and 785 nm, they deliver tight edge steepness of <80 cm–1, passband ripple of ±<2%, a 20-mm clear aperture and laser line blocking of >6 optical density. The RoHS-compliant filters meet MIL specifications for environmental testing and mechanical durability. All use hard dielectric coatings and none requires cover glass. Transmittance is >90%, scratch-dig surface quality is 60/40, and temperature dependence is 5 pm/°C.See full productRelated content from Photonics MediaPRODUCTSPhotonics Showcase January 2023 IssueIR and Patterned FiltersDSI designs and manufactures bandpasses, beamsplitters, ARs, and absorption coatings for use in the MWIR through LWIR wavelength regions, customized to specific applications. 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