A test integrated device and test method for cryogenic radiometer
A low-temperature radiation and testing method technology, applied in the field of low-temperature radiometers, can solve the problems of low testing accuracy and complex structure, and achieve the effects of eliminating poor testing accuracy, high testing accuracy and improving detection accuracy.
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Embodiment 1
[0044] combine figure 1 and figure 2 , a test integrated device for low temperature radiometer, 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 four-quadrant detector is installed with a vacuum flange 4 , and an off-axis parabolic mirror 5 is arranged inside the main cylinder.
[0045] The front end of the main cylinder body 1 is connected with a front end vacuum flange 6 , and the rear end of the main cylinder body 1 is connected with a rear end vacuum flange 7 .
[0046] Brewster window transmittance test window 2, stray light test window 3 and four-quadrant detector mounting vacuum flange 4 are all communicated with the main cylinder.
[0047] The side of the four-quadrant detector mounting vacuum flange 4 is provided with an aviation plug interface 8, the bottom of the four-quadrant detector moun...
Embodiment 2
[0054] A method for aligning and debugging an incident beam of a cryogenic radiometer, using the test integrated device for a cryogenic radiometer described in Embodiment 1.
[0055] The method includes the following steps:
[0056] Step 1: Complete the spatial filtering and stable power control of the incident light, open the cold shields of the cryogenic radiometer at all levels, remove the black body cavity of the cryogenic radiometer, and adjust the direction of the incident light to allow the incident light to pass through the center of the black body cavity mount.
[0057] Step 2: Reassemble the black body cavity and the cold shields of the cryogenic radiometer at all levels, and install the rear vacuum flange 7 with the light-through holes of the outer shielding cover of the cryogenic radiometer through the vacuum baffle valve.
[0058] Step 3: Observe whether the incident light passes through the center of the central through hole of the off-axis parabolic mirror 5, if...
Embodiment 3
[0062] After completing the alignment of Example 2, a Brewster window transmittance test was performed.
[0063] 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: A two-dimensional electric translation stage is installed on one side of the test integrated device, a photodetector 15 is arranged on the two-dimensional electric translation stage, and the photodetector can move on the two-dimensional electric translation stage.
[0066] Step 3: The photodetector extends into the transmittance test window of the Brewster window, and the inclination angle of the Brewster window and the polarization state of the incident light are adjusted 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 of the Brewster window 1 , af...
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