Infrared radiometer and measurement method applied in vacuum and low temperature environment

Abstract

The invention discloses an infrared radiometer applied in a vacuum and low temperature environment, comprising an external calibration source, an optical system, an internal calibration source, a modulation fan, an infrared detector assembly, a pre-broadband amplifier, a lock-in amplifier, data acquisition processing and control device. The internal calibration source and the external calibration source are used for calibration of the infrared radiometer; the optical system is used to collect target light; the modulation fan is placed between the optical system and the infrared detector assembly, and the measured light radiation Modulate as the synchronous input of the lock-in amplifier; the preamplifier amplifies the output signal of the infrared detector component and outputs it to the lock-in amplifier, and after the lock-in amplifier processes it, it forms a The signal is collected by AD and processed by computer and software to form the measurement result. The invention can realize on-orbit multi-point, high-precision, wide temperature range, rapid value traceability or radiation value measurement of the calibration source used for on-orbit calibration.

Description

technical field [0001] The invention belongs to the technical field of infrared radiation measurement, calibration and calibration, and relates to an infrared radiometer applied in a vacuum and low temperature environment. Background technique [0002] At present, with the development of technology, the application of infrared imagers has been extended to near space and outer space. These systems include space infrared observation system, near space detection system, and spaceborne infrared remote sensing system. With the technical and tactical performance of these infrared load With the gradual increase in requirements, high-precision quantitative detection has become an inevitable trend for the further development of infrared loads. [0003] Radiation parameter calibration is the basis and prerequisite for quantitative detection of infrared loads. Through radiation parameter calibration, the radiation value of the target can be quantitatively detected, so that the infrared...

AI Technical Summary

Problems solved by technology

[0008] Traditional on-orbit radiation parameter calibration has few calibration points, generally one or two-point calibration, and the calibration temperature range is narrow, which cannot meet the current infrared load calibration and calibration requirements of on-orbit radiation parameters, and requires a new high-performance calibration source. , if the calibration source is not traceable and transferred, its value cannot be guaranteed to be accurate, and high-precision on-orbit calibration cannot be achieved. Therefore, in order to ensure the accurate traceability of the calibration source, high-precision traceability and Calibration, which requires the use of an infrared radiometer in a vacuum and low temperature environment, as a value transfer and infrared radiation value measurement device, to ensure the traceability of the value and the accuracy of the value measurement

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