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A short-wave infrared two-speed variable magnification optical lens

A short-wave infrared, optical lens technology, applied in optics, optical components, instruments, etc., can solve the complex structure of continuous zoom system, can not meet the needs of short focal length large field of view search and long focal length high-resolution imaging and high-precision measurement at the same time, Visible light and mid- and long-wave infrared imaging systems have low resolution and other problems, to achieve the effect of reducing secondary spectrum, improving imaging performance, and excellent distortion performance

Active Publication Date: 2021-07-27
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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Problems solved by technology

[0005] In order to solve the technical problems of the low resolution of the existing visible light and medium and long-wave infrared imaging systems, the complex structure of the continuous zoom system, and the inability to simultaneously meet the needs of short focal length large field of view search and long focal length high-resolution imaging and high-precision measurement, the present invention provides A Shortwave Infrared Two-speed Zoom Optical Lens

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  • A short-wave infrared two-speed variable magnification optical lens
  • A short-wave infrared two-speed variable magnification optical lens
  • A short-wave infrared two-speed variable magnification optical lens

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[0039] The content of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0040] Such as figure 1 and figure 2 As shown, a short-wave infrared two-speed zoom optical lens is based on a mechanical compensation system and adopts a negative group zoom method, which can realize the needs of short focal length and large field of view search and long focal length high-resolution imaging and high-precision measurement. . The lens includes a front fixed mirror 1 , a focusing mirror 2 , a variable power mirror group 01 , a rear fixed mirror group 02 , a first folding mirror 8 and a second folding mirror 9 arranged sequentially from the object side to the image side 10 .

[0041] The front fixed mirror 1 is a biconvex positive lens, and the front fixed mirror 1 adopts a low-dispersion crystal material CaF2, which can reduce the contribution of chromatic aberration.

[0042] The focusing lens 2 is a...

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Abstract

The present invention provides a short-wave infrared two-speed variable magnification optical lens, which solves the problem of the low resolution of the existing visible light and medium-long wave infrared imaging systems, the complex structure of the continuous zoom system, and the inability to simultaneously satisfy short focal length large field of view search and long focal length high-resolution imaging. Problems with high precision measurement needs. The lens includes a front fixed mirror, a focusing mirror, a zoom lens group, a rear fixed mirror group, a first folding mirror and a second folding mirror; the front fixed mirror is a biconvex lens with positive power; the focusing mirror is a negative Power biconcave lens; zoom lens group includes a negative power biconcave lens and a positive power meniscus positive lens curved toward the image side; rear fixed lens group includes two positive power biconvex lenses and a negative power The meniscus lens is bent toward the object side, the normal line of the first folding mirror and the second folding mirror have an included angle of 45° with the optical axis; The mirror is used to achieve temperature and distance focusing, and the zoom group moves along the optical axis to realize the zoom function.

Description

technical field [0001] The invention relates to a short-wave infrared optical lens, in particular to a short-wave infrared two-speed variable magnification optical lens suitable for large field of view capture and long focal length measurement. Background technique [0002] With the continuous development of infrared technology, the measurement of targets is developing in the direction of larger field of view and higher resolution. In the atmospheric environment, the infrared radiation transmission window mainly has three bands: 0.9-1.7 μm, 3-5 μm and 8-12 μm. There are two main sources of energy for the short-wave infrared system: one is the energy of reflected sunlight. Strong penetrating ability, therefore, clear imaging can be performed in bad weather; on the other hand, the short-wave infrared system has the imaging characteristics of the medium-wave infrared and long-wave infrared systems, and can obtain the radiation energy of the target itself. According to the Wien...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B15/14
CPCG02B15/1441
Inventor 刘凯段晶周亮单秋莎闫佩佩姜凯
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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