A test method for the noise equivalent temperature difference device of a super large field of view infrared thermal imager
A noise equivalent temperature difference, infrared thermal imaging camera technology, applied in the field of infrared imaging, can solve the problem of not considering the impact, etc., to achieve the effect of improving accuracy
Active Publication Date: 2021-11-02
LUOYANG INST OF ELECTRO OPTICAL EQUIP OF AVIC
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[0011] 3) The signal transfer function of the infrared system is the ratio of the signal value corresponding to the temperature difference between the target and the background and the temperature difference between the target and the background. Due to the test environment and test equipment, the signal transfer function has a certain deviation
Traditional test equipment only uses temporal high-frequency noise to characterize the noise information of the infrared imaging system, without considering the influence of other components on the infrared imaging system
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[0037] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0038] A noise-equivalent temperature difference device for a super-large field of view infrared thermal imager, including a blackbody controller, a blackbody radiation source, a collimator light pipe, an infrared imaging system and a low-voltage differential signal acquisition industrial computer, the blackbody controller is connected to the blackbody radiation source, and the blackbody radiation The source provides radiant energy, and through the collimated light tube, the incident light source of the black body is converted into a parallel light source and enters the infrared imaging system. The infrared imaging system collects grayscale data, and controls the temperature of the blackbody radiation source through the blackbody controller.
[0039] The test method of the noise equivalent temperature difference device of the super large field of view i...
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The invention provides a noise-equivalent temperature difference device and a test method for an infrared thermal imager with a super large field of view. The light source enters the infrared imaging system, and the infrared imaging system is aimed at the center of the field of view of the measuring collimator, and transmits the test data to the industrial computer. temperature control. The invention solves the problem that the equivalent temperature difference of infrared noise in a super-large field of view cannot be tested, and obtains test results that meet the accuracy requirements; introduces a three-dimensional noise model, subdivides it into seven components according to time noise and space noise, and can comprehensively evaluate infrared imaging Noise of the system; the invention samples the original grayscale data without being affected by the image processing algorithm, and can effectively improve the accuracy of the test.
Description
technical field [0001] The invention relates to the field of infrared imaging, in particular to a noise equivalent temperature difference device and a testing method for an infrared imaging system. Background technique [0002] The infrared imaging system obtains the heat map distribution of the target and the background by detecting the infrared radiation characteristics. The noise equivalent temperature difference is one of the main performance parameters of the infrared imaging system, which can characterize the temperature sensitivity of the system to the target. Through the laboratory data test of the noise equivalent temperature difference, the working distance of the infrared imaging system can be evaluated. [0003] Traditional noise equivalent temperature difference test equipment includes black body radiation source, target target plate, collimated light pipe, analog video acquisition equipment, calculation software and monitor. The schematic diagram of the test ...
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IPC IPC(8): G01J5/00G01J5/52
CPCG01J5/00G01J2005/0077G01J5/53
Inventor梁锡宁余晨菲郭晨龙杜保林郑国锋
OwnerLUOYANG INST OF ELECTRO OPTICAL EQUIP OF AVIC