Medium-wave infrared refrigeration continuous zoom lens with large target surface and small F number and optical system

Abstract

The invention relates to an optical lens, in particular to a medium-wave infrared refrigeration continuous zoom lens with a large target surface and a small F number and an optical system. The invention aims to solve the technical problem that in the prior art, a continuous zooming micro-scanning lens which can simultaneously meet the requirements of a large target surface and a small enough F number and adopts a medium-wave refrigeration type detector does not exist, and provides a medium-wave infrared refrigeration continuous zooming lens with a large target surface and a small F number and an optical system. A secondary imaging continuous zooming system is adopted, the diameter of a front fixed group is reduced, seven lenses are adopted by the whole system on the premise of meeting imaging quality, the four-time zoom ratio is met, the size is small, the weight is light, the structure is simple, improvement of system transmittance and detection sensitivity and 100% matching of a cold diaphragm are achieved, light beam energy loss is reduced, and the system sensitivity is improved. The optical axis direction of the system is changed by turning back the two reflectors, the length and size of the system are effectively reduced, and the spatial resolution of the system is improved while the optical path direction is changed by the micro scanning mirror.

Description

technical field [0001] The invention relates to an optical lens, in particular to a mid-wave infrared cooling continuous zoom lens with a large target surface and a small F number and an optical system. Background technique [0002] In recent years, infrared thermal imaging systems have been widely used in many fields because they can work around the clock and are less affected by the environment. At the same time, related technologies have developed rapidly. The continuous zoom lens can realize large field of view search and small field of view tracking. The imaging effect is good during the continuous zooming process, and the target will not be lost during the zooming process. [0003] When using an infrared thermal imager on a turntable, it is generally required to have a longer detection distance and a higher detection sensitivity. In the application, a higher resolution and a longer working distance are usually required, and the imaging resolution of the system is put f...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the technical problem in the prior art of lacking a continuous zoom micro-scanning lens that can simultaneously satisfy a large target surface and a sufficiently small F number, and adopt a medium-wave cooling type detector, and provide a large target surface with a small F number Mid-wave infrared cooling continuous zoom lens and optical system

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