CALIBRATION OF A PYROELECTRIC DETECTOR AT 10.6 MU-M WITH THE NATIONAL-INSTITUTE-OF-STANDARDS-AND-TECHNOLOGY HIGH-ACCURACY CRYOGENIC RADIOMETER

The National Institute of Standards and Technology (NIST) is establish ing an infrared detector calibration facility to improve radiometric s tandards at infrared wavelengths. The absolute response of the cryogen ic bolometer that serves as the transfer standard for this facility is being linked to the NIST high-accuracy cryogenic radiometer (HACR) at a few laser wavelengths. At the 10.6-mu m CO2 laser line, this Link i s being established through a pyroelectric detector that has been cali brated against the HACR. We describe the apparatus, methods, and uncer tainties for the calibration of this pyroelectric detector.