Calibration device of infrared radiometer and calibration method of infrared radiometer
A technology of infrared radiation and calibration devices, which is applied in the direction of electric radiation detectors, etc., can solve the problems of affecting accurate calibration, affecting calibration accuracy, making it difficult to clearly image blackbody radiation sources, etc., and achieve the effect of improving calibration accuracy and overcoming broadening problems
Inactive Publication Date: 2011-08-17
CHINA NORTH IND NO 205 RES INST
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Problems solved by technology
The disadvantages of this device and the corresponding calibration method are: the aberrations caused by the collimation system will cause the broadening of the infrared radiation source, which will affect the accurate calibration; it is difficult to calibrate the infrared radiometer with a large field of view
[0004] There is no special measurement institution in China to perform the above-mentioned measurement on the infrared radiometer, but in the actual use process, the general user uses the blackbody radiation source to directly align the infrared radiation meter for calibration. In this way, it is difficult to realize the effective measurement of the blackbody radiation source The aperture is sharply imaged in the field of view of the infrared radiometer, thereby affecting the accuracy of the calibration
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[0019] In order to further reveal the present invention, the present invention will be further described below in conjunction with the accompanying drawings and preferred embodiments.
[0020] Such as figure 1 As shown, the preferred embodiment of the infrared radiometer calibration device of the present invention includes an infrared standard radiation source, an infrared optical collimation system and a signal receiving system. The infrared standard radiation source includes a standard black body radiation source 6, a modulator 3 and a precision aperture 4, and the three are assembled according to a general light source assembly method and placed on a precision turntable 5. The temperature of the standard blackbody radiation source 6 is continuously adjustable from room temperature to 1000°C. The precision diaphragm 4 is a series of discrete diaphragm plates installed on the diaphragm disc. The modulator 3 is equipped with a chopper such as figure 2 As shown, its duty rati...
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The invention discloses a calibration device of an infrared radiometer and a calibration method of the infrared radiometer, belonging to the field of infrared measurement. The device comprises a standard infrared radiation source, an infrared optical collimation system and a plurality of standard detectors and computers; the infrared optical collimation system is formed by a plane mirror and an off-axis parabolic mirror. The infrared radiation emitted by the standard infrared radiation source is received by a calibrated infrared radiometer or a standard detector directly or after being collimated by the infrared optical collimation system, and the measuring voltage of the collimated infrared radiometer or the standard detector is obtained correspondingly; the standard infrared radiation source is shielded, so that the collimated infrared radiometer or the standard detector receives the background radiation directly or via the infrared optical collimation system and correspondingly obtains the background voltage of the collimated infrared radiometer or the standard detector, thereby calculating the radiance responsiveness curve of the infrared radiometer. The device and the method disclosed by the invention solve the responsiveness calibration problem of large view infrared radiometer, and the calibration precision is high.
Description
technical field [0001] The invention belongs to the field of infrared optical measurement, and relates to a device for calibrating the irradiance responsivity of an infrared radiometer and a calibrating method thereof. Background technique [0002] The calibration of the infrared radiometer is mainly for the calibration of the irradiance responsivity of the infrared radiometer. The infrared standard radiation source with known radiation value is used to calibrate the infrared radiometer, and the output value (such as voltage value) of the infrared radiometer and the output value of the infrared radiometer are obtained. The relationship between the input radiation, the process is the calibration of the infrared radiometer. When other technical conditions are equal, the more accurate the known radiation value received by the infrared radiometer, the more accurate the resulting calibration result will be. [0003] Foreign countries generally use the device described below to c...
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IPC IPC(8): G01J5/10
Inventor 岳文龙闫晓宇王学新谢毅李旭东李燕付建明
Owner CHINA NORTH IND NO 205 RES INST
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