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Medium short wave wide band passive athermalization optical system

An optical system and wide-band technology, applied in the field of optics, can solve problems such as athermalization, and achieve the effect of improving image quality, excellent image quality, and simple installation and adjustment

Active Publication Date: 2017-05-31
LUOYANG INST OF ELECTRO OPTICAL EQUIP OF AVIC
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to avoid the deficiencies of the prior art, the present invention proposes a passive athermalized optical system with medium and short wavelengths and wide bands, which overcomes the limitations of single-band infrared systems for obtaining information, and at the same time solves the problem of no heating problem

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  • Medium short wave wide band passive athermalization optical system
  • Medium short wave wide band passive athermalization optical system
  • Medium short wave wide band passive athermalization optical system

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Embodiment Construction

[0022] Now in conjunction with embodiment, accompanying drawing, the present invention will be further described:

[0023] Such as figure 1 Shown is the optical path diagram of the seven-chip medium-short-wave wide-band passive athermal infrared optical system designed by the present invention, which is arranged in sequence along the optical axis from the object side to the image side as the first lens 1, and the negative focal power lens adopts Zinc sulfide material; the second lens 2 is a positive power lens made of barium fluoride material; the third lens 3 is a positive power lens made of silicon material; the fourth lens 4 is a negative power lens made of fluorine Calcium material; the fifth lens 5, a positive power lens, made of zinc sulfide material; the sixth lens 6, a negative power lens, made of silicon material; the seventh lens 7, a positive power lens, made of zinc selenide Material;

[0024] A detector is arranged at the rear end of the seventh lens 7, and the ...

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Abstract

The invention relates to a medium short wave wide band passive athermalization optical system. A straight cylinder type one-time imaging system configuration is employed, and the optical system is formed by seven lenses. An appropriate optical material is selected, and appropriate radius of curvature and lens interval are selected to correct the cold reflection of the optical system. An aspheric special surface shape type is used, an optimization program is set to correct the primary aberration and advanced aberration of the optical system, and a purpose of image quality optimization is achieved. Appropriate optical material and structural material are selected, and through the mutual offset of optical material refraction index temperature change and an optical material thermal expansion change and the structural material thermal expansion change, the passive athermal design of a wide temperature range is realized.

Description

technical field [0001] The invention belongs to the field of optical technology, and relates to a passive adiabatic optical system with medium and short wavelengths and wide bands. Background technique [0002] Due to the absorption of infrared radiation by the atmosphere, there are three important atmospheric windows, which are distributed in the three bands of near-infrared of 0.75-2.5 μm, mid-wave infrared of 3-5 μm and long-wave infrared of 8-14 μm. Traditional infrared imaging systems generally work in a narrow band and obtain limited information. Therefore, combined with the imaging characteristics of each band, the infrared optical system working in a wide band can obtain sufficient and useful information, and can effectively distinguish objects from a large number of It can be identified in the image of the target and play a pivotal role in target recognition and detection. However, the existing optical system does not consider the problem of athermalization in the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/14G02B13/18
CPCG02B13/14G02B13/18
Inventor 王彦张良赵珩赵延
Owner LUOYANG INST OF ELECTRO OPTICAL EQUIP OF AVIC
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