Integrated test device and test method for low-temperature radiometer

A low-temperature radiation and integrated device technology, which is applied in the field of low-temperature radiometer test integrated devices, can solve problems such as low test accuracy and complex structure, and achieve the effects of eliminating response differences, improving detection accuracy, and eliminating poor test accuracy of stray light

Active Publication Date: 2019-11-12
THE 41ST INST OF CHINA ELECTRONICS TECH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problems that the Brewster window transmittance testing device, the beam alignment device and the stray light testing device are separated from each other in the current cryogenic radiometer testing system, the structure is complex and the testing accuracy is low, the first purpose of the present invention is to provide a A test integrated device for low temperature radiometer

Method used

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  • Integrated test device and test method for low-temperature radiometer
  • Integrated test device and test method for low-temperature radiometer
  • Integrated test device and test method for low-temperature radiometer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] to combine figure 1 with figure 2 , a test integrated device for cryogenic radiometers, comprising a main cylinder 1, the upper part of the main cylinder 1 is provided with a Brewster window transmittance test window 2 and a stray light test window 3, and the lower part of the main cylinder 1 is provided with A vacuum flange 4 is installed on a four-quadrant detector, and an off-axis parabolic reflector 5 is arranged inside the main cylinder.

[0045] The front end of the main cylinder 1 is connected with a front vacuum flange 6 , and the rear end of the main cylinder 1 is connected with a rear vacuum flange 7 .

[0046] Brewster window transmittance test window 2, stray light test window 3 and four-quadrant detector installation vacuum flange 4 are all communicated with the main cylinder.

[0047] The side of the four-quadrant detector installation vacuum flange 4 is provided with an aviation plug interface 8, the bottom of the four-quadrant detector installation va...

Embodiment 2

[0054] A method for aligning and debugging an incident beam of a low temperature radiometer, using the integrated test device for a low temperature radiometer described in Embodiment 1.

[0055] The method includes the following steps:

[0056] Step 1: Complete the spatial filtering of the incident light and stabilize the power control, open the cold shields at all levels of the low temperature radiometer, remove the black body cavity of the low temperature radiometer, and adjust the direction of the incident light so that the incident light passes through the center of the black body cavity mounting seat.

[0057] Step 2: Reassemble the black body cavity and cold shields of all levels of the cryoradiometer. The rear vacuum flange 7 is installed together with the light hole of the outer shield of the cryoradiometer through the vacuum baffle valve.

[0058] Step 3: Observe whether the incident light passes through the center of the through hole of the off-axis parabolic reflect...

Embodiment 3

[0062] After completing the alignment in Example 2, a Brewster window transmittance test was performed.

[0063] to combine image 3 , a low temperature radiometer Brewster window transmittance test method, comprising the following steps:

[0064] Step 1: Install Brewster window 14 on front vacuum flange.

[0065] Step 2: Install a two-dimensional electric translation platform on one side of the test integration device. A photodetector 15 is arranged on the two-dimensional electric translation platform, and the photodetector can move on the two-dimensional electric translation platform.

[0066] Step 3: The photodetector extends from the Brewster window transmittance test window, and adjusts the inclination angle of the Brewster window and the polarization state of the incident light until the optimum transmittance value of the Brewster window is obtained.

[0067] Step 4: The photodetector first tests the optical power value P at the front end of the Brewster window 1 , af...

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Abstract

The invention discloses an integrated test device and test method for a low-temperature radiometer. The device is a compact integrated device integrating the installation, debugging and stray light test functions of a Brewster window transmittance and light beam alignment device; the device is simple in structure and high in test accuracy. Compared with the existing device for testing the transmittance of a Brewster window by using two detectors, the design scheme of the integrated test device tests the transmittance of the Brewster window by using an electronic control translation platform and the same detector, so that response difference between the different detectors can be conveniently eliminated, and detection accuracy can be improved. According to the test device and test method, amethod for detecting the transmittance of an off-axis parabolic mirror is provided for indirectly detecting the luminous power of the stray light, the stray light in the periphery of the four-quadrant detector can be eliminated, and the problem that the stray light test accuracy is poor due to the fact that the detector has poor test accuracy on very weak luminous power can be solved.

Description

technical field [0001] The invention relates to the field of low-temperature radiometers, in particular to a test integration device and a test method for low-temperature radiometers. Background technique [0002] The low-temperature radiometer uses the measurement principle of the electrical calibration method in a low-temperature superconducting environment, and is currently the international benchmark for optical radiation power measurement. In order to reduce the inequalities of photoelectric heating, the optical radiation absorption cavity of the cryoradiometer is placed in a vacuum radiation shielding layer whose temperature is close to the temperature of liquid helium, and a Brewster window is set on the shielding layer to allow incident light to enter the absorption cavity . Using the relationship between the reflection characteristics of the Brewster window and the polarization characteristics of the laser beam, the linearly polarized incident light perpendicular t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J1/02
CPCG01J1/0295
Inventor 庄新港史学舜刘红博张鹏举刘长明王恒飞
Owner THE 41ST INST OF CHINA ELECTRONICS TECH GRP
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