Request Info4D Technology CorporationThe Surface Solution Isolation Source from 4D Technology Corp. is designed for the AccuFiz Fizeau laser interferometers. The fiber coupled source excludes all but the surface of interest, making it simple to measure flat, transparent optics with physical thickness as thin as 200 μm. In a single setup, both the front and back surfaces of an optic can be measured without repositioning. Transmitted wavefront error, homogeneity and optical thickness can then be obtained from a combination of measurements. 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With over 50 years experience, our...PHOTONICS BUYERS' GUIDE CATEGORIESLaser GratingsStar Fiber Optic CouplersInformation Display SystemsElectro-Optic CrystalsCOMPANIESPhotonics Buyers' Guide4D Technology Corporation4D Technology designs and manufactures laser interferometers, surface roughness profilers, snapshot micropolarizer cameras, and handheld surface gauges, for accurate measurement of optics, optical...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' GuideOhara CorporationOHARA manufactures more than 130 environmentally safe optical glass types, free of both lead and arsenic. 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