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Compact medium wave infrared continuous zooming system

A zoom system and compact technology, applied in the field of zoom systems, can solve the problems of long structural size and difficulty in meeting lightweight requirements, and achieve the effect of short zoom stroke, light weight and small size

Pending Publication Date: 2019-01-22
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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Problems solved by technology

[0004] The purpose of the present invention is to overcome the shortcomings of the existing refrigeration type mid-wave infrared continuous zoom system, which has a long structure and difficult to meet the requirements of light weight, and provide a compact mid-wave infrared continuous zoom system

Method used

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  • Compact medium wave infrared continuous zooming system

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Embodiment Construction

[0028] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0029] Such as figure 1 , 2 , 3 and Table 1, the 25mm-300mm / F4 cooling type mid-wave infrared continuous zoom optical system provided in this embodiment adopts 6 groups of 8-element structure, the focal length range is 25mm-300mm, and the F-number is 4, which is suitable for With a resolution of 640×512 and a pixel size of 15μm, the thermal imaging camera has a cold screen efficiency of 100%, and the total system length is 170mm.

[0030]A compact medium-wave infrared continuous zoom system, including a front fixed group, a zoom group, a compensation group, a middle fixed group, a focusing group and a rear fixed group, which are coaxially arranged from left to right along the optical axis. The left side is the object plane, and the right side of the rear fixed group is the image plane; the front fixed group is composed of the first lens 1, a...

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Abstract

The invention relates to a zooming system and provides a compact medium wave infrared continuous zooming system, aiming to overcome defects that existing refrigerating medium wave infrared continuouszooming system is long and is heavy. The zooming system comprises a front fixed group, a zoom group, a compensation group, a middle fixed group, a focusing group and a rear fixed group that are arranged coaxially in sequence along an optical axis direction from left to right, wherein the left side of the front fixed group is an object side, the right side of the rear fixed group is an image side,the front fixed group consists of a first lens, the zoom group consists of a second lens, the compensation group consists of two lenses, that is, a third lens and a fourth lens from left to right in sequence, the middle fixed group consists of a fifth lens, the focusing group consists of a sixth lens, the rear fixed group consists of two lenses, that is, a seventh lens and an eighth lens from leftto right in sequence, the zoom group and the compensation group can move toward each other or in an opposite direction along the optical axis, the zoom group is used for changing the focal length continuously, and the compensation group is used for compensating image side movement caused by change of focal length.

Description

technical field [0001] The invention relates to a zoom system, in particular to a compact mid-wave infrared continuous zoom system. Background technique [0002] Infrared zoom optics are a distinct class of passive detection optics that detect, locate and continuously track objects and targets that emit infrared light against infrared background radiation and other disturbances. Therefore, it has broad application prospects in target search, early warning detection, forest fire prevention and other fields. [0003] At present, most of the cooled mid-wave infrared continuous zoom systems have long structural dimensions and high weight, which cannot be well applied to systems with lightweight requirements such as airborne pods and portable vehicles. In addition, due to the long motion stroke of this continuous zoom system, the required cam structure size is relatively large, which requires precise machining of the cam structure, which is not only expensive; but also the actua...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B15/15
CPCG02B15/15
Inventor 姜凯黄伟闫佩佩单秋莎刘凯
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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