Introduction: | To meet a variety of different market demands, SCHOTT offers its well-known B 270™ crown glass in sheet glass form. B 270™, manufactured by the up-draw method, offers high stability with respect to solarization in combination with high transmission in the visible wavelength range. It has a fire-polished surface and high chemical stability. For optical substrate application (e.g. mirror coating, filter coating and AR coating), we make the fine polish on double surface to achieve 40-20 S/D and certain surface flatness and parallelism.
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