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Grating Links Catalogue Definitions Specifications Equations OEM Links OEM Products Gratings Spectrographs Monochromators Detectors Assemblies Design General Specifications Blanks The blank is the thick substrate material upon the surface of which the diffraction grating resides. The standard blank material is annealed Pyrex (T.M. Corning, Inc.) glass. Other materials are available upon request; for example, fused silica, Zerodur alloy, CVD silicon carbide, stainless steel, aluminum, Kanigen copper, and others. Tolerances on length and width: + or - 0.1 mm; thickness: + or - 0.2 mm; concave radius: + or - 0.2%. Ruled Area The ruled area is generally the same as the blank size (called Size in the tables), less a 2 mm border. Quality Certificate Each grating is delivered with a certificate containing the serial number and a statement certifying that the grating has passed all specifications tests, together with test results for efficiency, wavefront and stray light.

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