Short-wave large-view-field lens for space

Abstract

The invention discloses a short-wave large-field-of-view lens for space. The lens comprises a reverse telephoto lens group and a rear lens group which are sequentially and coaxially arranged along a light incident direction. The reverse telephoto lens group comprises a first negative lens and a second negative lens which are arranged in sequence; the rear lens group comprises a third positive lens, a fourth positive lens, a fifth positive lens, a sixth negative lens, a seventh positive lens and an eighth negative lens which are sequentially arranged. According to the invention, the reverse telephoto lens group and the rear lens group are arranged, and the reverse telephoto lens group can enable the main plane parameters of the lens to move backwards, thereby facilitating the incidence of light into the rear lens group. And meanwhile, the focal power and the material thermal expansion coefficient of each lens in the two lens groups are reasonably set, so that the lens can realize a large field angle; image plane stabilization under vacuum can be realized under normal-pressure and high-and-low temperature conditions, the requirements of aerospace miniaturization, large field and long-period monitoring are met, and the lens can also be used for various imaging requirements on the ground.

Description

technical field [0001] The invention relates to the technical field of optical design, in particular to a short-wave and large-field-of-view lens for space. Background technique [0002] SWIR imaging systems are widely used in industrial security, especially in electrical and high temperature detection. However, it is rarely used in the space environment because of its high cost. However, with the development of technology, short-wave infrared imaging systems are getting cheaper and cheaper. Therefore, for space stations and satellite platforms, short-wave infrared imaging systems have gradually been used for power system monitoring. [0003] However, due to application limitations and cost issues, current short-wave imaging cameras rarely have large-field-of-view low-distortion lenses, and the distortion of lenses with a field of view above 60° is greater than 5%. At the same time, in the space station, due to its unique radiation, temperature difference, and air pressure ...

AI Technical Summary

Problems solved by technology

[0004] In view of this, the embodiment of the present invention provides a short-wave large field of view lens for space to solve the technical problems of the existing short-wave infrared imaging system with a small field of view and unstable imaging in space

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