Abstract
The performance of high power carbon dioxide and free electron lasers depends upon the quality of mirrors used in them. A precise characterization of mirrors is required, and this is achieved by employing reference standards. Standards for the calibration of reflectance scale for the infrared region are not available. The present work describes the development of a specular reflectance standard at glancing angles of incidence from 10° to 70° for the 2,5 μm to 25 μm infrared region. Whereas aluminium and gold mirrors have been used as high reflectance value standards, single and double surface polished silicon and germanium have been employed as standards at low reflectance values.
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