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A switchable zoom athermal difference long-wave infrared zoom lens

A long-wave infrared, zoom lens technology, applied in the field of infrared thermal imaging, can solve the problems of large field of view, difficult passive heat dissipation design, etc., to achieve the effect of good image quality, simplified use complexity, and strong energy collection capability

Active Publication Date: 2022-05-20
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the field of view angle of the existing athermal design system is generally large, and the system designed with a small field of view is difficult to realize the passive athermal difference design of the system, and to provide a switchable zoom athermal difference type LWIR Zoom Lens

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  • A switchable zoom athermal difference long-wave infrared zoom lens
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  • A switchable zoom athermal difference long-wave infrared zoom lens

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Embodiment Construction

[0034] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present invention, and are not intended to limit the protection scope of the present invention.

[0035] The invention provides a switchable zoom athermal difference long-wave infrared zoom lens, the imaging lens is suitable for the long-wave infrared band of 7.7 μm to 9.5 μm, and the small / large field of view switching of the lens is realized by means of cut-in / cut-out , has the characteristics of a small field of view and a passive adiabatic design. Specifically, the system achieves small-field imaging of the lens by cutting in the zoom lens group, and realizes imaging of a large field of view by cutting out the zoom lens group. This zooming method can realize rapid switching of the field of view and reduce the risk of ta...

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Abstract

The invention provides a switchable zoom athermal difference long-wave infrared zoom lens, which solves the problem that the field of view of the existing athermal design system is generally large, and the system with a small field of view design is difficult to realize the passive athermal difference design of the system question. The adiabatic long-wave infrared zoom lens includes a lens barrel, a front fixed mirror group, a first reflector, a rear fixed mirror group, a second reflector, a zoom mirror group, a secondary imaging mirror group and a long-wave infrared detector assembly; The fixed mirror group, the first reflector, the rear fixed mirror group, the second reflector, the secondary imaging mirror group and the long-wave infrared detector assembly are arranged in sequence along the optical path, and the zoom lens group is arranged on the second reflector and the secondary imaging mirror The optical path between the groups, and can cut in and out of the optical path; the zoom lens is a long-wave infrared lens with a small field of view, compact structure, simple zoom structure, and can realize switchable zoom, and the lens realizes passive heat dissipation Designed to enhance adaptability to ambient temperature changes.

Description

technical field [0001] The invention belongs to the field of infrared thermal imaging, in particular to a switchable zoom adiabatic long-wave infrared zoom lens. Background technique [0002] The long-wave infrared imaging system mainly uses the thermal energy radiated by the object itself for imaging, so as to realize the long-distance detection of the object. It is mainly used in fire early warning detection, emergency rescue, high-end imaging monitoring and other fields. The long-wave infrared dual-field of view system has two imaging fields of view of different sizes, which can realize wide-range perception and long-distance detailed inspection of the target area. Compared with fixed-focus systems, it has greater advantages in practical applications and has become the current Research hotspots. [0003] Chinese patent CN 102269871 A discloses a two-color dual-field infrared imaging optical system, which realizes a dual-field system design of 9°×6.75° / 3°×2.25°; Chinese p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B15/10G02B13/18G02B1/00G02B7/02
CPCG02B15/10G02B13/18G02B1/00G02B7/021G02B7/028
Inventor 马迎军彭建伟梅超曲锐闫阿奇陈卫宁
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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