Request InfoBristol Instruments Inc.The 621 laser wavelength meter introduced by Bristol Instruments Inc. uses optical interferometry to measure wavelength with high accuracy, reliability, versatility and convenience. Model 621A measures absolute wavelength with ±0.2-ppm accuracy, and the 621B delivers an accuracy of ±1.0 ppm. The built-in wavelength standard performs continuous calibration. Various versions operate from 350 nm to 4.0 µm. 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For the...PHOTONICS BUYERS' GUIDE CATEGORIESPhotonics Components TestingBeam Measurement EquipmentLaser Diode Test EquipmentUltraviolet Inspection TestingCOMPANIESPhotonics Buyers' GuideOptikos CorporationThe Optical Engineering Experts® Optikos designs and manufactures metrology products for measuring and assuring optical image quality; and provides optical engineering design, development,...Photonics Buyers' GuideFOCtek Photonics Inc.FOCtek provides customers with all types of custom manufactured lenses, Precision Optical Components, Polarizing Optics, Prisms, Filters, Coatings, Optical Systems, Crystals, Nonlinear Crystals,...Photonics Buyers' GuideOZ Optics LimitedEstablished in 1985, OZ Optics is a leading worldwide supplier of fiber optic components, test equipment and sensors. 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