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High resolution visible light/near infrared common optical path optical system

An optical system, high-resolution technology, used in optics, optical components, instruments, etc., can solve the problems of complex optical system structure, and achieve the effect of small size, simplified structure, and small number of sheets

Active Publication Date: 2016-02-03
LUOYANG INST OF ELECTRO OPTICAL EQUIP OF AVIC
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  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a high-resolution visible light / near-infrared common optical system to solve the problem that the structure of the traditional dual-band optical system is relatively complicated

Method used

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  • High resolution visible light/near infrared common optical path optical system
  • High resolution visible light/near infrared common optical path optical system
  • High resolution visible light/near infrared common optical path optical system

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Embodiment Construction

[0017] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0018] like figure 1 As shown, the high-resolution visible light / near-infrared common optical system includes an aperture stop 1, a first lens 2, a second lens 3, a third lens 4, and a fourth lens 5 arranged coaxially from the object space to the image space in sequence. , the fifth lens 6 and the detector focal plane 7 . Wherein, the surface of the second lens 3 close to the object side is a harmonic diffraction surface.

[0019] The design indicators of the optical system are: the working band is 0.4~1.2μm, the F / # is 3.0, the field of view is 16°×12°, the resolution is 1280×1024, the focal length is 45.5mm, and the optical transmission MTF is 50 line pairs (lp / mm) both bands are greater than 0.7.

[0020] Based on the above basic design index parameters, this embodiment provides a specific structure of an optical system.

[0021] The surface of the sec...

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Abstract

The invention relates to a high resolution visible light / near infrared common optical path optical system. The high resolution visible light / near infrared common optical path optical system comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a detector focal plane which are arranged co-axially from the object side to the image side successively, wherein the surface, being close to the object side, of the second lens is a harmonic diffraction surface. The optical system can realize double wave band: a 0.4 to 0.7Mum visible light working wave band and a 0.7-1.2Mum short wave infrared working wave band, and does not set independent sub systems for the visible light and the infrared light. The high resolution visible light / near infrared common optical path optical system only needs one system and only needs one optical path to realize observation of the visible light and the infrared light, so that the identification efficiency of the target is improved and the false alarm rate is reduced. The high resolution visible light / near infrared common optical path optical system is high in resolution, wherein the highest resolution can be 1280*1024. The high resolution visible light / near infrared common optical path optical system skillfully introduces a harmonic diffraction lens into the design of the optical system, and can satisfy the imaging requirement and the aberrations correcting requirement for the system in two wave bands, and is high in aberrations elimination performance.

Description

technical field [0001] The invention relates to a high-resolution visible light / near-infrared common light path optical system. Background technique [0002] At present, the existing widely used optical systems can be divided into two parts according to different observation objects: visible light optical system and infrared optical system. Infrared optical systems have their own advantages and disadvantages. Visible light optical systems have high imaging resolution and low cost, but the detection distance is limited in severe weather such as snow and fog; short-wave infrared optical systems have good fog penetration capabilities, but the cost is high. Resolution is limited. In order to enable the optical system to perform both visible light observation and infrared observation, the current optical system is divided into three parts: visible light subsystem, infrared subsystem and public subsystem, for example: Chinese patent application with application number 20131024883...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/00G02B13/14G02B1/00
CPCG02B1/00G02B13/00G02B13/14
Inventor 刘环宇崔岩赵凯生赵延
Owner LUOYANG INST OF ELECTRO OPTICAL EQUIP OF AVIC
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