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19 August 1996 Infrared standards for system calibration
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Abstract
Space and military applications of optical systems require proof of performance of components at acceptance of contract and an active QA system in use throughout manufacture. To support these and other requirements the National Physical Laboratory provides a range of IR spectrophotometric reference standards that are individually calibrated to a known uncertainty of absolute measurement under conditions that match the customer's needs. These standards of transmittance, of regular reflectance, of hemispherical reflectance and of wavenumber are necessary because of the significant errors that may occur in IR spectrophotometers. The nature and causes of the errors are discussed, and why they are worse in IR instruments than in UV/visible ones. The NPL techniques, equipment and special modifications are described. Stable samples submitted by customers are also calibrated, and in some cases these have the advantage of giving an advantageous like-with-like measuring situation for the customer.
© (1996) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Frank J.J. Clarke "Infrared standards for system calibration", Proc. SPIE 2775, Specification, Production, and Testing of Optical Components and Systems, (19 August 1996); https://doi.org/10.1117/12.246735
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