Device for alignment of infrared lens set under low temperature

The present invention discloses a device for alignment of an infrared lens set under low temperature. The device comprises a housing pedestal, a cold transferring copper cavity, a stock solution inner container, a strain adjusting rack, an installation cap, millesimal nuts, magnets, a lens set tube socket, a transition installation block, an air exhaust interface, a lead interface and a light transmission window. A cavity formed by the housing pedestal, the cold transferring copper cavity, the stock solution inner container and the installation cap is configured to provide low-temperature vacuum environment for an adjusted lens set. The magnets are arranged on the strain adjusting rack and the external portion of the housing to adjust the millesimal nuts arranged at the external portion of the device, and the repulsive force generated by changing the distance of the magnets is employed to drive the alignment fine tuning of the lens. A laser welder is employed to perform spot welding fixing of the fixed edges