Request InfoFiltech Photonics Co. Ltd.Filtech Photonics Co. Ltd. has developed filter sets for applications in fluorescence microscopy. They exhibit high transmission (>90 percent) in the passbands, blocking of optical density >6 and sharp transition from transmission to blocking. Manufactured with ion beam sputtering technology, the hard-coated dielectric devices are robust and environmentally stable. Their surface quality permits a scratch width of 0.06 mm and a dig diameter of 0.40 mm or better. 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