Light small-size medium-wave infrared continuous zooming imaging lens

Abstract

A light small-size medium-wave infrared continuous zooming imaging lens comprises a first lens set (110), a second lens set (120), a third lens set (130), a fourth lens set (140), a first reflector (170), a second reflector (180), a fifth lens set (150) and a detector (160) from an object space to an imaging space in sequence, wherein the first lens set (110) has positive focal power and is used as a front fixing set, the second lens set (120) has negative focal power and is used as a zooming set, the third lens set (130) has negative focal power and is used as a compensation set, the fourth lens set (140) has positive focal power and is used as a rear fixing set, the first reflector (170) and the second reflector (180) are used for bending a light path, and the fifth lens set (150) has positive focal power. Spherical mirrors are adopted in all the lens, and the light small-size medium-wave infrared continuous zooming imaging lens is simple in structure, small in size, light in weight, and especially suitable for being used in small-size pod equipment.

Description

technical field [0001] The invention belongs to the field of optical technology and relates to an optical imaging lens. Background technique [0002] With the continuous development of precision-guided weapon technology, airborne optoelectronic pods have become an important part of precision strike and tracking systems. The continuous zooming mid-wave infrared system uses photoelectric sensors to realize the continuous zooming process without moving the image plane by moving the lens group, and completes the large field of view search for the target, the fine detailed inspection of the small field of view and the accurate positioning of the target, as well as the target tracking during the zooming process . [0003] The existing mid-wave infrared continuous zoom lens is mainly suitable for relatively large and heavy pods. For example, Yang Weijin and Sun Qiang from the Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences reported an 18-fol...

AI Technical Summary

Problems solved by technology

The mid-wave infrared zoom lenses reported above are all designed for large-volume pods, but they cannot meet the requirements of the system with a total length of less than 280mm and a mass of less than 110g. The device is used in a small pod of Φ230mm

In addition, the zoom lenses reported above all use multiple aspherical or diffractive surfaces, which greatly increases the actual processing difficulty and processing accuracy, and the actual processed products cannot achieve the expected analog imaging effect, which undoubtedly greatly reduces the lens image quality

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