Infrared radiometer calibration method on basis of standard plane source black body

Abstract

The invention discloses an infrared radiometer proportional constant calibration method on the basis of a standard plane source black body and belongs to the field of infrared optimal radiation. The calibration method aims at the characteristics that a chopper of a current infrared radiometer is sprayed with high-emissivity black paint and the current infrared radiometer is provided with four temperature probes; when the temperature of the chopper is equal to that of a built-in temperature control reference black body, a signal is acquired, so that additional radiation of the chopper is avoided entering a detector; and moreover, in the signal acquiring process, the environment temperature, the temperature in a shell and the temperature of the chopper are requested to be equal to enable radiation among the environment, the shell and the chopper is dynamically balanced, and thus, influence of additional radiation of the chopper, the inside of the shell, the environment and the like can be eliminated. In addition, in the calibration method, calibration of a plurality of temperature points is also carried out in a common environment temperature range, so that the defect of replacing a plane with points in a conventional method, i.e. one temperature point replaces a plurality of temperature points to carry out calibration, is overcome. Compared with the prior art, the infrared radiometer proportional constant calibration method has higher accuracy.

Description

technical field [0001] The invention belongs to the field of infrared radiation, and mainly relates to a method for calibrating an infrared radiometer, in particular to a method for calibrating an infrared radiometer with a standard surface source black body. Background technique [0002] A general infrared radiometer includes: two optical axes parallel to each other and the field of view is equal to the telescopic infrared optical components and visible light CCD aiming components, chopper, built-in temperature control reference blackbody, detector, signal processing and built-in temperature control reference blackbody temperature Control circuit, three-dimensional adjustment mechanism, and precision thermometer. The three-dimensional adjustment mechanism can drive the infrared radiometer to move in azimuth, pitch and height. The precision thermometer has a temperature probe for measuring the temperature of the built-in temperature control reference black body. When the i...

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Problems solved by technology

However, the calibration method of the traditional infrared radiometer is not suitable for the calibration of this improved infrared radiometer

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