Searching and tracking integrated infrared zoom lens and imaging method

Abstract

The invention relates to a searching and tracking integrated infrared zoom lens and an imaging method, and aims to solve the problems that the existing searching and tracking integrated infrared zoom lens adopts a diffractive optical element to correct chromatic aberration, so that the system structure is relatively complicated, a diffraction ring is generated on an image surface, and the signal-to-noise ratio and the imaging contrast ratio are reduced. The lens comprises a front-end telescope group, a sweep reflector and a rear-end imaging lens group which are sequentially arranged along a light path, wherein the sweep reflector is used for compensating image motion and expanding a field angle. The front-end telescope group comprises a first lens, a second lens, a third lens and a fourth lens which are sequentially arranged along a light path, the first lens is a silicon positive lens, the second lens is a germanium negative lens, the third lens is a silicon positive lens, and the fourth lens is a germanium negative lens; and the rear-end imaging lens group comprises a fifth lens, a sixth lens, a seventh lens and an eighth lens which are sequentially arranged along the light path, the fifth lens is a sulfur positive lens, the sixth lens is a silicon positive lens, the seventh lens is a germanium negative lens, and the eighth lens is a silicon positive lens.

Description

technical field [0001] The invention relates to the field of infrared optical systems, in particular to an infrared zoom lens integrated with search and tracking and an imaging method. Background technique [0002] At present, in the process of searching and tracking a moving target with an integrated infrared zoom lens, in order to compensate for moving image motion, a parallel optical path is usually formed in the telephoto part of the front end of the system, and a one-dimensional or two-dimensional swing mirror is added to the rear end of the parallel optical path. , the oscillating mirror performs oscillating scanning to compensate motion image motion and achieve the purpose of clear imaging. There are mainly two types of optical paths that make up the telephoto part of the front end, one is the Keplerian type with an intermediate image plane, and the other is the Galilean type without an intermediate image plane. In the design process, in order to correct the system ch...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the existing search-and-track integrated infrared zoom lens uses diffractive optical elements to correct chromatic aberration, which makes the system structure more complex, and will generate a diffraction ring on the image plane, reducing the signal-to-noise ratio and imaging contrast, and provides a Search and tracking integrated infrared zoom lens and imaging method

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