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Two-color two-field infrared imaging optical system

An infrared imaging and optical system technology, applied in the field of optical systems, can solve the problems of large volume, large diameter of optical system, difficult installation, etc., and achieve the effect of compact optical structure, small system volume, and small number of lenses

Active Publication Date: 2011-12-07
KUNMING INST OF PHYSICS
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Problems solved by technology

However, the two existing dual-band thermal imaging systems have the following disadvantages: the former has a complex structure, bulky size, difficult installation, and serious energy attenuation; The common defect is that they are all single-field lenses, which cannot meet the requirements of search and aiming tasks in complex situations

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  • Two-color two-field infrared imaging optical system
  • Two-color two-field infrared imaging optical system
  • Two-color two-field infrared imaging optical system

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Embodiment Construction

[0013] The present invention will be described in detail below through embodiments in conjunction with the accompanying drawings.

[0014] as attached image 3 As shown, the two-color two-field-of-view infrared imaging optical system of the present invention is composed of a total of five lenses, the front fixed group 9, the zoom group 10 and the rear fixed group 11, which are determined as the first to the fifth from left to right. Lens, the variable power group 10 moves forward along the axial direction to the front of the primary image plane, forms an objective lens with the front fixed group 9, and realizes a narrow field of view; the variable power group 10 moves backward along the axial direction to the back of the primary image plane, and is fixed Group 11 constitutes a relay group to realize a wide field of view; thereby realizing switching between narrow and wide field of view. The zoom mode of the optical system adopts the zoom group 10 to perform axial translation ...

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Abstract

The invention discloses a bicolor dual-view field infrared imaging optical system. The bicolor dual-view field infrared imaging optical system is characterized by consisting of five lenses including a front fixing lens set (9), a multifocal lens set (10) and a rear fixing lens set (11), wherein the front fixing lens set consists of two lenses, the multifocal lens set consists of one lens, and therear fixing lens set consists of two lenses. The multifocal lens set can axially move in front of or behind a primary image surface to realize switching between a wide view field and a narrow view field; in the five lenses, lenses with a binary diffraction surface is used as a second surface of a second lens and a second surface of a fourth lens. The bicolor dual-view field infrared imaging optical system has the advantages of simple and compact structure, small system size and less lenses, can simultaneously performing imaging at a medium wave infrared wave band with wavelength of 4-5 microns and a long wave infrared wave band with wavelength of 8-9 microns while implementing functions of searching (a wide view field of 9 degrees* 6.75 degrees) and aiming (a narrow view field of 3 degrees*2.25 degrees). The system design takes account of miniaturization and lightweight requirement of the infrared system and meets the use technology requirement of the infrared system.

Description

technical field [0001] The invention relates to an optical system, in particular to an infrared dual-color detector dual-view imaging system. Background technique [0002] The infrared optical system is an indispensable part of the infrared thermal imaging system, and its main function is to collect the energy of the target radiation and control the imaging quality. Existing infrared optical systems basically work in a single band, and there are certain limitations in practical applications. The presence of a target is detected or the accuracy of detection decreases. The dual-band infrared optical system can detect targets in the presence of cluttered echoes, distinguish targets from decoys, and disable infrared countermeasures such as smoke, camouflage, and flares. In addition, in order to meet the requirements of aiming and searching within a specific field of view at the same time, a dual-field infrared optical system must be used. Therefore, the research on the two-co...

Claims

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Application Information

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IPC IPC(8): G02B27/00G01J5/08G01J5/54
Inventor 陈吕吉李萍朱继航徐曼陈津津于振龙杨开宇曹凌
Owner KUNMING INST OF PHYSICS
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