Lens installing and positioning device in cold optical technology

Abstract

The invention relates to a lens installing and positioning device in a cold optical technology, and relates to the field of low-temperature infrared. The lens installing and positioning device comprises a main lens cone, two lenses, a tetrafluoroethylene cushion, fine-thread adjusting screws, a mirror spacer ring, a lens pressing ring, pressure springs, pressing screws and a pressing cover. The first lens is positioned through cooperation of an oblique face at the front end of the main lens cone and an oblique face of the first lens, optical spacing between the first lens and the second lens is guaranteed through the mirror spacer ring, the mirror spacer ring is in oblique face fit with the two lenses, the second lens is pressed through the lens pressing ring, pressing force between the second lens and the lens pressing ring is realized through the pressure springs, connection between the pressing screws and the main lens cone is used for adjusting the pressing force, and the pressing cover plays a protective role. The lens installing and positioning device solves the problem of lens installing and fixing within a large temperature change range, can adapt to thermal deformation of the lenses and a supporting structure thereof within a large temperature change range, and guarantees that the lenses are not damaged irrecoverably while surface shape precision of lens surfaces is guaranteed.

Description

technical field [0001] The invention relates to the field of low-temperature infrared technology, in particular to a lens installation and positioning device in cold optical technology. Background technique [0002] With the continuous development of infrared technology, the application of infrared imaging terminals and other equipment on ground-based and space large-aperture telescopes is becoming more and more extensive. At the same time, people have higher and higher requirements for the performance of infrared detection instruments. When the target signal is very weak, the signal distance is relatively long, and the temperature is low, the thermal radiation and stray light of the optical system and its related supporting components in the infrared detection instrument will affect the detection performance. In order to reduce the impact of these aspects, refrigeration technology is generally used to reduce the temperature of the optical system and related supporting compo...

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