Infrared Optical Properties of Materials

Certain commercial entities, equipment, or materials may be identified in this document in order to describe an experimental procedure or concept adequately. Such identification is not intended to imply recommendation or endorsement by the National Institute of Standards and Technology, nor is it intended to imply that the entities, materials, or equipment are necessarily the best available for the purpose. Abstract This document describes the Fourier Transform Infrared Spectrophotometry (FTIS) Facility (NIST), which provides the infrared optical properties of materials (IROPM) calibration service, 38075 S, over the infrared spectral range of 1 µm to 25 µm. It is organized as follows. Section 1 introduces the FTIS facility for measuring the infrared reflectance, transmittance, absorptance and emittance of materials and the services available. Section 2 describes the physics basis for the measurements. Section 3 describes the setups and measurements. Section 4 describes the measurement assurance process with various publications as appendices on the FTIS measurement uncertainties and intercomparisons. A template for the calibration service report for customers is provided in Sec. 5 and references are added in Sec. 6.