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A small infrared real-time radiation calibration device

A radiometric calibration and infrared technology, applied in the field of radiometric calibration, can solve the problems of being unable to be embedded inside the imager, large in size, etc., and achieve the effects of compact structure, good radiometric calibration accuracy, and reduced volume and weight.

Active Publication Date: 2019-02-01
TIANJIN JINHANG INST OF TECH PHYSICS
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

As described in patent CN104133201A, the on-board calibration device based on variable temperature black body can perform two-point calibration, but for the airborne infrared imager with small volume space, the calibration device is too large to be embedded in imaging internal

Method used

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  • A small infrared real-time radiation calibration device
  • A small infrared real-time radiation calibration device
  • A small infrared real-time radiation calibration device

Examples

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Embodiment 1

[0035] In this embodiment, a temperature-variable on-board radiation calibration device, such as Figure 1-Figure 5 As shown, it includes blackbody components, switching mechanism, and calibration control circuit. The blackbody assembly is mounted on the switching mechanism. When the infrared imager images the target, the switching mechanism places the blackbody switch outside the imaging light path. When performing on-board radiation calibration, the calibration control circuit first controls the temperature of the blackbody at a low temperature. When the temperature is stable, the motor drives the switching mechanism to place the blackbody in the optical path, and removes it from the optical path after image acquisition is completed. Then control the black body at a high temperature. When the temperature is stable, the motor drives the switching mechanism to place the black body in the optical path, and remove it from the optical path after the picture is taken. After coll...

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Abstract

The invention belongs to the technical field of radiation calibration, and in particular relates to a small-sized infrared real-time radiation calibration device, which is used for on-board real-time radiation calibration of an airborne infrared imager. Compared with the prior art, the technical solution of the present invention makes the thermoelectric cooler, black body, radiator, etc. into a black body assembly, which has a compact structure and layout. At the same time, an in-line switching mechanism is designed, which can significantly reduce the volume and size of the calibration device on the machine. The weight meets the miniaturization and light weight requirements of the airborne infrared imager. Moreover, the thermoelectric cooler can realize cooling or heating, so that the temperature of the calibration blackbody can be adjusted, and can well realize two-point radiation calibration, thereby providing better radiation calibration accuracy for the airborne infrared imager.

Description

technical field [0001] The invention belongs to the technical field of radiation calibration, and in particular relates to a small-sized infrared real-time radiation calibration device, which is used for on-board real-time radiation calibration of an airborne infrared imager. Background technique [0002] As the infrared detector changes with the use environment and the working time increases, the responsivity of different detection units will drift to different degrees. If the real-time calibration on the machine is not performed, the non-uniformity of the image will become worse and worse. Perform on-board real-time radiometric calibration. [0003] Commonly used real-time radiometric calibration methods include single-point calibration and two-point calibration. The uncooled infrared cameras of FLIR in the United States all use room-temperature blackbody baffles for single-point radiation correction. Although they are small in size, the single-point correction effect is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01J5/00
CPCG01J5/00G01J5/80
Inventor 殷国平王丰年
Owner TIANJIN JINHANG INST OF TECH PHYSICS
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