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Optical glasses are divided into glass groups, which include glasses with a similar chemical composition and thus also have a similar optical characteristic. SCHOTT Optical Glass Map Forms of Supply Fine annealed optical glass with up to five non-machined, as-cast surfaces. Cut blanks: with standard or with increased optical and internal properties and dimensional tolerance requirements. Pressings Specifications Optical properties: Refractive index with tolerances Abbe value with tolerances Refractive index homogeneity Internal transmission and color code Internal properties: Striae Bubbles and inclusions Stress birefringence Usually it is sufficient to specify only the optical and internal properties. However, for some applications the chemical, mechanical or thermal properties might also be required. A detailed description of the properties of each available glass is available to download. Quality Assurance Optical glass is subjected to stringent quality inspection before delivery. All stages of the optical glass production are continuously monitored. Additionally, an elaborate final inspection is performed. A test certificate in accordance with DIN EN 10204 documents the standard supply quality. Delivery lots are tested for refractive index scattering, stress birefringence, striae and bubbles according to DIN ISO 10110. On request we can also supply test certificates with increased accuracy. For high homogeneous cut blanks we confirm homogeneity by interferometry. For more information please contact the technical team at Skan
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