Ununiformity emendation real-time calibration apparatus for staring type thermal imaging system

A technology of non-uniformity correction and calibration device, applied in the direction of electric radiation detector, etc., can solve the problem of poor correction effect and so on

Inactive Publication Date: 2009-07-01
NANJING UNIV OF SCI & TECH
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  • Abstract
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  • Application Information

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Problems solved by technology

This method can be calibrated on site, and the time domain drift compensation effect is better, but the correction effect is relatively poor

Method used

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  • Ununiformity emendation real-time calibration apparatus for staring type thermal imaging system
  • Ununiformity emendation real-time calibration apparatus for staring type thermal imaging system
  • Ununiformity emendation real-time calibration apparatus for staring type thermal imaging system

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Embodiment Construction

[0047] The present invention will be further described below in conjunction with the accompanying drawings.

[0048] combine figure 1 , the non-uniformity correction real-time calibration device of the staring thermal imager of the present invention comprises an infrared lens 1, an equivalent high and low temperature reference black body block 2, an infrared detector 3, a stepping motor 4 and a signal processing control circuit 5, located in the infrared The equivalent high and low temperature reference black body block 2 between the lens 1 and the infrared detector 3 is connected to the rotor of the stepping motor 4, and the power supply and control port of the stepping motor 4 are connected to the signal processing control circuit 5; the infrared lens 1 is used to target The infrared radiation is focused on the focal plane of the detector; the equivalent high and low temperature reference blackbody barrier 2 is used for real-time high and low temperature calibration of non-u...

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Abstract

The invention discloses a non-uniformity collection real-time calibration device for staring type thermal imagers, comprising an infrared lens, an infrared detector and a signal processing control circuit, wherein the signal processing control circuit is connected with the infrared detector, an equivalent high and low temperature reference blackbody retaining strip between the infrared lens and the infrared detector is connected with the rotor of a step motor, the power supply and control port of the step motor are connected with the signal processing control circuit, the equivalent high and low temperature reference blackbody retaining strip is provided with an equivalent high temperature reference blackbody region and an equivalent low temperature reference blackbody region. The non-uniformity collection real-time calibration device can make thermal imagers follow working conditions in actual application to adopt two-point non-uniformity correction algorithm based on temporal recursive to process on-site real-time calibration, thereby obtaining good non-uniformity correction effect and temporal shift compensation effect, thereby improving the imaging quality and stability of staring type thermal imagers, to expand the application range of staring type thermal imagers.

Description

A technical field [0001] The invention belongs to the non-uniformity correction technology of an infrared thermal imaging system, in particular to a real-time calibration device for non-uniformity correction of a staring thermal imager. Two background technology [0002] Staring thermal imagers have response non-uniformity due to the manufacturing process of their detectors, and this non-uniformity is manifested as fixed pattern noise on the output image of the detector. The non-uniformity of different types of infrared detectors is different, the non-uniformity of PtSi type detectors can be less than 1%, the non-uniformity of HgCdTe and InSb type infrared detectors is about 10%, and the microbolometric The non-uniformity of gauge detector can reach 20%. The non-uniformity of the infrared detector seriously affects the imaging quality of the thermal imager, making the image unclear, and even causing the target to be unrecognizable. If the non-uniformity correction processin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J5/10
Inventor 张俊举常本康孙恋君钱芸生邱亚峰富荣国
Owner NANJING UNIV OF SCI & TECH
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