Request InfoGigahertz-Optik Inc.The Op.Di.Ma. optically diffuse reflecting material from Gigahertz-Optik Inc. is a white optical-grade plastic used in a variety of lighting design, laser and reflection/transmission applications. It exhibits a diffuse reflectance of >98% from 400 to 1600 nm and >95% from 250 to 2000 nm, uniformly over a large area. The material, available as sheets, blocks and square or round plates, offers long-term UV stability, high-temperature operation up to 200 °C (300 °C for short exposures) and high maximum permissible radiation flux densities. 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