This paper presents the results of experimental studies of the characteristics of an on-board calibrator with an extended radiating surface for energy calibration of IR optoelectronic devices. Test-stand measurement equipment and methods of checking the characteristics of the calibrator are described. The main technical characteristics of the calibrator are a working spectral range of 2.0-12.5 μm, an area of the radiating surface of 320 mm × 460 mm, and a temperature range from +7 to +55°C.
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