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This graph shows the measured total transmission of an uncoated 10 mm thick UV fused silica mirror blank at normal incidence.
Thorlabs' mirror blanks are designed to be used as front-surface mirrors when coated. Fabricated from substrate-grade fused silica, which exhibits high transmission in the 185 nm to 2.1 μm range (refer to the transmission graph to the right), these mirror blanks offer a high degree of purity and exceptional environmental durability.
Our Ø19 mm mirror blank is specifically designed to fit our Polaris Fixed Optic Mounts for laser system design and other OEM applications. This diameter provides a larger clear aperture than Ø1/2" optics while allowing the mounts to maintain a Ø1" footprint.