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Space optical camera spectral radiation response function measuring device and method

A technology of space optics and spectral radiation, applied in the field of optical remote sensing, can solve the problems of small dynamic range and low measurement accuracy, achieve the effect of improving measurement accuracy, increasing adjustment range, and realizing high-precision measurement

Inactive Publication Date: 2017-08-29
THE 41ST INST OF CHINA ELECTRONICS TECH GRP
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  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention proposes a device and method for measuring the spectral radiation response function of a space optical camera, which solves the problems of small dynamic range and low measurement accuracy when measuring the spectral radiation response function of a space camera; adopts integrating sphere cascading technology and precision aperture transformation technology, Established a high-repeatability, large dynamic range brightness-adjustable integrating sphere light source, and realized a simple and convenient measurement method for the spectral radiation response function of space cameras

Method used

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  • Space optical camera spectral radiation response function measuring device and method
  • Space optical camera spectral radiation response function measuring device and method
  • Space optical camera spectral radiation response function measuring device and method

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specific Embodiment approach 1

[0048] like figure 1 , 2 As shown, the space optical camera spectral radiation response function measurement device of this embodiment includes a large dynamic range radiance adjustable integrating sphere light source 1, a standard filter radiance meter 2, an electronically controlled three-dimensional translation platform 3 and a processing computer 4;

[0049] The large dynamic range radiance-adjustable integrating sphere light source 1 generates uniform diffuse light beams under different radiance conditions required for the test, and is placed at a certain distance along the direction of the output beam of the large dynamic range radiance-adjustable integrating sphere light source 1 The standard filter radiance meter 2, the electronically controlled three-dimensional displacement stage 3 are used to ensure that the standard filter radiance meter 2 and the measured space optical camera 5 are in the same position during measurement, and the standard filter radiance The sign...

specific Embodiment approach 2

[0050] like image 3 As shown, the large dynamic range radiance adjustable integrating sphere light source 1 in this embodiment includes a main integrating sphere 11, a satellite sphere 12, a tungsten halogen light source 13, a precision adjustable diaphragm 14, a high-stable programmable power supply and a control system 15 The tungsten-halogen light source 13, the satellite ball 12 and the precision adjustable diaphragm 14 include multiple groups, and the light beam output by the tungsten-halogen light source 13 of each group is uniformly lighted by the satellite ball 12 and passes through the satellite ball 12 and the The precision adjustable aperture 14 between the main integrating spheres 11 is incident to the main integrating sphere 11.

[0051] Among them, the diameter of the main integrating sphere 11 is 500mm, the shell material is aluminum alloy design, has 3 light inlets, one light outlet is 50mm in diameter, the spectral range is 380nm-1000nm, there are three satel...

specific Embodiment approach 3

[0052] like Figure 4 As shown, the diameters of the apertures 16 at different positions on the precision adjustable diaphragm 14 in this embodiment are designed to be fixed in size, and there are 6 apertures with different aperture sizes on each turntable, and the apertures on the three turntables are The size is not repeated, and the adjustment of the radiance of 1-216 levels can be realized. Other components and steps are the same as those in Embodiment 1.

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Abstract

The present invention relates to the technical field of optical remote sensing, and more particularly to a sapce optical camera spectral radiation response function measuring device and method. The measuring device comprises a large dynamic range radiance adjustable integrating sphere light source, a standard filter radiance meter, an electronically controlled three-dimensional displacement table and a processing computer. By changing the diaphragm apertureof the satellite sphere to achieve the precise control of the luminous flux input to the integrating sphere, and using the multiple satellites and the main integrated sphere cascade technology, the adjustment range of the brightness can be greatly increased. With the use of traceability of the standard filtering radiance meter of the low temperature radiometer, the large dynamic range radiance adjustable integrating sphere light source radiance accurate calibration can be achieved. With the use of the alignment method, the high precision measurement of space camera spectral response function is achieved.

Description

technical field [0001] The invention relates to the technical field of optical remote sensing, in particular to a device and method for measuring a spectral radiation response function of a space optical camera. Background technique [0002] The space optical camera is one of the important optoelectronic loads in the field of space optical remote sensing technology. It can be carried on various aircraft, and it is not restricted by the territory from the visible light to the short-wave infrared. From the air to military facilities, the development of strategic weapons, conflicts and crisis areas Take photos and monitor changes in the military situation. Space optical cameras can also be widely used in civil fields such as precise mapping, urban planning, land use, resource management, environmental monitoring, and geographic information services to promote the development of the national economy. [0003] The spectral radiation response function of a space optics camera ref...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M11/02
CPCG01M11/0292
Inventor 孙权社赵发财王少水王国权郑祥亮韩忠
Owner THE 41ST INST OF CHINA ELECTRONICS TECH GRP
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