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Conic cavity water bath black body source originated from absolute low temperature radiometer and its calibration method

A tapered cavity and radiometer technology, applied in the field of optical radiation measurement, can solve the problem of insufficient standard uncertainty of temperature control accuracy, effective emissivity and brightness measurement, temperature control accuracy of heating elements and effective temperature field uniformity of the cavity Issues such as emissivity limitations

Inactive Publication Date: 2009-06-03
ANHUI INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the normal temperature black body has formed a stereotyped product and has been promoted and used abroad. There are also a few scientific research institutes in China. There are certain limitations in the application of chemical infrared remote sensing
[0005] For the increasingly high quantitative requirements of modern infrared remote sensing applications, some existing infrared blackbodies based on temperature measurement standards are relatively insufficient in terms of temperature control accuracy, effective emissivity, and standard uncertainty of brightness measurement.

Method used

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  • Conic cavity water bath black body source originated from absolute low temperature radiometer and its calibration method
  • Conic cavity water bath black body source originated from absolute low temperature radiometer and its calibration method
  • Conic cavity water bath black body source originated from absolute low temperature radiometer and its calibration method

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Embodiment Construction

[0023] The blackbody source in the conical cavity water bath traced back to the absolute low temperature radiometer includes a conical cavity 1 and a constant temperature water bath 3, which is characterized in that the front end of the conical cavity 1 is connected with a cylindrical cavity 2, and the cone angle of the conical cavity 1 is 36 degrees, the inner walls of the conical cavity 1 and the cylindrical cavity 2 are black, coated with black glaze paint or black matting paint. The cylindrical cavity 2 and the water bath 3 are sealed and connected by a polytetrafluoroethylene sealing gasket, and the conical cavity 1 and the cylindrical cavity 2 are connected by threads and sealed with waterproof glue.

[0024] image 3 It is an example of using the present invention to realize high-precision calibration of a space-borne infrared sensor. After passing through a series of optical systems, the radiation of a water-bath blackbody source converges on the photosensitive surface...

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Abstract

The present invention discloses one kind of conic cavity water bath black body source originated from absolute low temperature radiometer and its calibration method. The black body source includes a conic cavity of 36 deg cone angle, a constant temperature water bath, and a cylindrical cavity connected to the front end of the conic cavity, and both the conic cavity and the cylindrical cavity have black inner wall. The calibration method includes the first infrared light power standard transmission based on absolute low temperature radiometer to make the power standard originated from absolute low temperature radiometer; and the subsequent setting one new optical path with increased precise diaphragm and light filter before the infrared power standard transmission detector, so as to make the infrared standard radiation brightness meter originated from absolute low temperature radiometer.

Description

technical field [0001] The invention belongs to an optical radiation measurement method and equipment, in particular to a high-precision tapered cavity water-bath blackbody source traceable from an absolute low temperature radiometer and a method for calibrating its radiance by using the absolute low temperature radiometer. Background technique [0002] The application of remote sensing satellites is getting deeper and deeper into all aspects of social life. At present, many remote sensing satellites that have been launched or will be launched in my country are equipped with imaging or non-imaging infrared optical sensors for infrared remote sensing to obtain infrared images or infrared spectral information of sky, ground and ocean targets. Infrared radiation is the basic carrier of infrared remote sensing information, and the geometric and spectral resolution capabilities of infrared optical sensors on various platforms are directly related to their accurate measurement cap...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01J3/00G01J5/00G01J5/28G21G4/00G01S7/497
Inventor 张磊郑小兵张黎明沈政国王乐意乔延利吴浩宇
Owner ANHUI INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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