Miniaturized medium-wave infrared refrigeration continuous zoom lens and optical system

Abstract

The invention relates to a miniaturized medium-wave infrared refrigeration continuous zoom lens and an optical system. The invention provides a miniaturized medium-wave infrared refrigeration continuous zoom lens and an optical system, aiming at solving the technical problems of low zoom ratio, low overall transmittance of the system, heavy weight, complex structure and higher control precision requirement of the existing infrared continuous zoom system and providing the miniaturized medium-wave infrared refrigeration continuous zoom lens and the optical system. The lens comprises a lens unit, a detector protection window G and an optical filter H which are sequentially arranged along an optical path from an object side to an image side, the lens unit comprises four groups of lenses which are sequentially arranged along an optical path, and the four groups of lenses are respectively a front fixed group with positive focal power, a zoom group with negative focal power, a compensation group with positive focal power and a relay group with positive focal power. The optical system adopts the lens. The lens is a miniaturized infrared continuous zoom lens with the advantages of total length, few lenses, simple structure, convenient assembly and high zoom ratio, and the contradiction between the structural assembly difficulty and miniaturization in the existing infrared continuous zoom lens is solved.

Description

technical field [0001] The invention relates to an optical lens, in particular to a miniaturized mid-wave infrared cooling continuous zoom lens and an optical system. Background technique [0002] Infrared detection system has developed rapidly in recent years and has a wide range of applications. The continuous zoom lens can realize large field of view search and small field of view tracking, and the size of the scene on the image plane can be continuously changed to achieve the needs and effects that fixed-focus lenses cannot meet. For infrared continuous zoom systems, there are two common types: long-wave uncooled and medium-wave cooled. Due to the advantages of medium-wave bands and cooled detectors, the imaging quality of medium-wave cooled is much better than that of long-wave uncooled continuous zoom systems, and it is more widely used. . [0003] At present, the research on medium-wave continuous zoom lens is also extensive. The Chinese patent with the publication...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the technical problems of the existing infrared continuous zoom system, such as low zoom ratio, low system overall tran...

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