Visible light/long-wave infrared broad band spectrum joint focusing optical imaging system

An optical imaging system, long-wave infrared technology, applied in optics, optical components, installation and other directions, can solve the problems of low detection accuracy of single-band, large aberration of dual-band imaging, thermal difference of infrared system, etc., and achieves light weight and small size. F-number imaging, the effect of reducing the use of lenses

Inactive Publication Date: 2012-06-13
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

[0004] In view of this, the present invention provides a visible/long-wave infrared (VIS/LWIR) wide-band confocal optical imaging system, which solves the problem of low detection accuracy of the existing singl

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  • Visible light/long-wave infrared broad band spectrum joint focusing optical imaging system
  • Visible light/long-wave infrared broad band spectrum joint focusing optical imaging system
  • Visible light/long-wave infrared broad band spectrum joint focusing optical imaging system

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Embodiment Construction

[0037] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0038] Such as figure 1As shown, the VIS / LWIR wide-band confocal optical imaging system includes a wide-spectrum focusing window 1, a color separation film 2, a long-wave infrared mirror group L1 and a visible light mirror group L2. Among them, the wide-spectrum focusing window 1 is placed perpendicular to the horizontal optical axis, the dichroic filter 2 is 45° to the horizontal optical axis, the visible light mirror group L2 is placed horizontally, and the incident light direction of the long-wave infrared mirror group is perpendicular to the horizontal optical axis. The above devices form two optical subsystems: infrared subsystem G1 and visible light subsystem G2. Infrared subsystem G1 is composed of wide-spectrum focusing window 1, color separation film 2, and long-wave infrared mirror group L1. Visible light subsystem G2 is co...

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Abstract

The invention discloses a visible light/long-wave infrared broad band spectrum joint focusing optical imaging system comprises a broad spectrum focusing window, a color separation film, a long wave infrared lens group and a visible light lens group. The color separation film and a horizontal optical axis form an angle of 45 degrees, and light incoming from the broad spectrum focusing window passes through the color separation film and the visible light lens group to image on a visible light sensor. The long wave infrared lens group is composed of a first lens, a second lens, a reflector and athird lens from an object space to an image space in sequence, the reflector is parallel to the color separation film, and infrared light in broad spectrum light passes through the color separation film and the long wave infrared lens group to image on a non-refrigeration detector. A first face of the second lens is a binary surface, a second face of the third lens is an aspheric surface, and systematic heat difference and optical aberration are removed through the design of the binary surface and the aspheric surface. The visible light/long-wave infrared broad band spectrum joint focusing optical imaging system can solve the problem that a single wave band is not high in detection accuracy, two wavebands and two lenses have optical parallax on imaging, two wavebands are big in imaging aberration, an infrared system has heat difference, and two wavebands need focusing mutually.

Description

technical field [0001] The invention belongs to a dual-band fusion thermal imaging system, and specifically relates to a wide-band confocal optical imaging system capable of dual-band imaging at 0.6 μm to 0.8 μm and 8 μm to 12 μm at the same time, which is mainly used in hand-held target detection and recognition systems . Background technique [0002] In recent years, with the rapid development of photoelectric imaging equipment, the camouflage technology of military targets has also continued to improve, resulting in the weakening of the information that can be detected by traditional single-band equipment, and the decline in target recognition rate, which can no longer meet the needs of military target detection. The optoelectronic imaging system based on dual-band has become a research hotspot at home and abroad. [0003] Due to the different imaging mechanisms of visible light and infrared detectors, the target characteristic information reflected by the two is also di...

Claims

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Application Information

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IPC IPC(8): G02B27/10G02B13/18G02B13/14G02B3/02G02B1/11G02B7/02G02B7/00
Inventor 金伟其林青王霞郭宏张莹昭
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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