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Refrigeration infrared detector

A technology of infrared detectors and refrigerators, which is applied in the field of infrared detection, can solve the problems that the cold storage time cannot be improved, and the temperature fluctuation of the detector can achieve the effect of enhancing the stability of temperature control and prolonging the cold storage time

Active Publication Date: 2017-05-24
11TH RES INST OF CHINA ELECTRONICS TECH GROUP CORP
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  • Description
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AI Technical Summary

Problems solved by technology

[0005] The J-T refrigeration type infrared detector with the existing structure is affected by the air consumption of the refrigerator that needs to be strictly limited, and the cold storage time cannot be increased; at the same time, the temperature of the detector will fluctuate greatly with the change of the instantaneous flow rate of the refrigerator

Method used

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Embodiment approach

[0039] ●Use tweezers to place the solder sheet on the back of the cold head, then place the cold storage wire mesh on the solder, and then place the brazing tooling in the stem.

[0040] Put the parts to be welded into the constant temperature zone of the furnace, and ensure that there are no foreign objects on the furnace table and furnace door, close the furnace door, start the mechanical pump, open the side pumping valve to vacuum the furnace chamber, and wait until the vacuum gauge shows that the vacuum degree is lower than After 10Pa, close the side pumping valve, open the front stage valve and main pumping valve of the molecular pump, start the molecular pump, and when the vacuum degree is better than 1x10E-3Pa, start the heating program, heat to 810°C-835°C, keep warm at 0- 1min, with the furnace cooling down to below 100°C, turn off the valve and the pump unit in turn, and when the temperature shows below 40°C, open the gas filling valve, pour nitrogen into the furnace ...

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Abstract

The invention discloses a refrigeration infrared detector. The refrigeration infrared detector comprises a dewar, a dewar cold finger, a refrigerator and a detector chip, wherein the refrigerator is positioned in the dewar cold finger; the detector chip is arranged in the dewar and is positioned on a cold head of the dewar cold finger; a cold storage device is arranged at the side, opposite to the cold head, of the bottom of the dewar cold finger. After the technical scheme is adopted, not only is cold storage time of the infrared detector prolonged while the gas consumption of the refrigerator is not increased, but the temperature control stability of the infrared detector is also improved to a certain extent.

Description

technical field [0001] The invention relates to the field of infrared detection, in particular to a cooling infrared detector. Background technique [0002] J-T refrigerated infrared detectors are widely used in various airborne, ship-borne and land-based missiles. They are the core components of missile tracking targets, which are equivalent to the "eyes" of missiles. In the preparation stage of the missile, the high-pressure gas cylinder supplies gas to the detector, so that the infrared detector quickly reaches its working temperature and can work normally. After the missile is launched, the infrared detector needs to continue to maintain a normal working state for a period of cold storage time to meet the requirements of tactical indicators when there is no or very little air source. The length of the cold storage time largely determines the ability of the missile to continuously track the target. Prolonging the cold storage time of the infrared detector is of great hel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J5/02
CPCG01J5/02
Inventor 韩蓬磊刘森董硕
Owner 11TH RES INST OF CHINA ELECTRONICS TECH GROUP CORP
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