Los Alamos Calibration Laboratory for multi-spectral and thermal imaging radiometer systems

摘要

Los Alamos National Laboratory is currently constructing a calibration laboratory to support the radiometric calibration of remote earth sensing instrumentation. This laboratory will consist of a calibration station contained within a vacuum chamber whose output interface plane will provide a radiometrically characterized collimated optical beam of 16in. diameter. This output beam is fed to a thermal vacuum chamber where sensors under test are to be housed. The station will contain reference sources suitable for calibration of detectors from the visible and near infrared (VIS/NIR) to the thermal infrared. Design goals for these sources include absolute radiometric accuracies of better than 1% (3(sigma)) for the thermal infrared up to 14 (mu)m and VIS/NIR wavelengths up to 0.9 (mu)m. For wavelengths between 0.9 (mu)m and 2.5 (mu)m, absolute accuracies of better than 3% are anticipated. Significant additional features of the calibration station design include: NIST support in the design and calibration of the radiometric sources, spectral characterization of the blackbody references, implementation of a vacuum compatible whitebody (integrating sphere) source, infrared resolution targets of variable contrast, and use of a scan mirror to duplicate target velocity vectors. This paper will provide an overview, description of the intended calibration station capability with further details provided in a companion paper also contained in these proceedings. (ERA citation 19:022371)