Medium-wave infrared cooling continuous zoom lens and optical system with large target area and small f number

Abstract

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. The purpose of the present invention is to solve the technical problem of the lack of 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 in the prior art, and provide a large target surface with a small F number The mid-wave infrared cooling continuous zoom lens and optical system. The secondary imaging continuous zoom system is used to reduce the diameter of the front fixed group. On the premise of satisfying the imaging quality, the system adopts 7 lenses as a whole, which meets the 4 times zoom ratio. It is small in size, light in weight and simple in structure. The improvement of transmittance and detection sensitivity is 100% matched with the cold aperture, which reduces the loss of beam energy and improves the system sensitivity. The direction of the optical axis of the system is changed by turning back two mirrors, effectively reducing the length and volume of the system, and the direction of the optical path is changed by the micro-scanning mirror while improving the spatial resolution of the system.

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...

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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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