NIST has developed portable radiometers to transfer primary detector-based scales for optical power, radiance, and irradiance in the infrared spectral region to user sites. These radiometers help provide end-to-end calibration of optical systems and complement blackbody broadband calibrations performed at NIST.
Several transfer radiometers have been developed to meet diverse user requirements:
– Missile defense transfer radiometer (MDXR) with integrated cryogenic Fourier transform spectrometer for full spectral capability
– BDMO transfer radiometer (BXR) with multi-year legacy of stable calibrations
– Thermal infrared transfer radiometer (TXR) for calibration of near-room-temperature extended-area blackbodies
NIST is also developing two new reference detectors:
– BIB-trap detector for high quantum efficiency and flat spectral response between 4 µm and 28 µm
– Pico-Watt ACR for primary standard in low power calibrations, enabling 1 pW calibration with less than 1% uncertainty
Source: https://www.nist.gov/programs-projects/transfer-radiometers-and-reference-detectors
Keywords: detector, calibrations, radiometers, standards, quantum efficiency
