Approach to estimate infrared point-target detection range against sky background based on contrast

WANG Gang; YU Bing-xi

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Approach to estimate infrared point-target detection range against sky background based on contrast

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- Approach to estimate infrared point-target detection range against sky background based on contrast
- Optics and Precision Engineering Vol. 10, Issue 3, Pages: 276-280(2002)
- 作者机构：
  
  中国科学院长春光学精密机械与物理研究所,吉林长春,中国,130033
- 作者简介：
- 基金信息：
- DOI：
  CLC： TP732+.2
- Received：12 January 2002，
  
  Revised：19 April 2002，
  
  Published Online：15 June 2002，
  
  Published：15 June 2002
- 稿件说明：
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王刚, 禹秉熙. 基于对比度的空中红外点目标探测距离估计方法[J]. 光学精密工程, 2002,(3): 276-280

WANG Gang, YU Bing-xi. Approach to estimate infrared point-target detection range against sky background based on contrast[J]. Editorial Office of Optics and Precision Engineering, 2002,(3): 276-280
王刚, 禹秉熙. 基于对比度的空中红外点目标探测距离估计方法[J]. 光学精密工程, 2002,(3): 276-280 DOI：

WANG Gang, YU Bing-xi. Approach to estimate infrared point-target detection range against sky background based on contrast[J]. Editorial Office of Optics and Precision Engineering, 2002,(3): 276-280 DOI：

摘要

基于最小分辨对比度准则

研究了天空背景下红外点目标的最大探测距离估计方法.首先

分析了红外波段大气辐射传输与衰减、对比度限制光电成像系统功率响应特性

建立了目标表观对比度模型

并推导出了由气溶胶消光系数和距离参量确定的探测距离方程.然后

对目标天空背景温差、发射率

气溶胶衰减系数

瞬时视场、对比度探测阈值以及辐射波长等参数作了详细讨论.最后

利用LOWTRAN7程序的典型大气模式数据

对红外点目标探测距离进行了数值模拟.

Abstract

This paper investigates the approach to estimate the maximum detection range of an infrared point-target against sky background based on the minimum resolved contrast(MRC)criteria. Firstly

the characteristics of radiation propagation and attenuation in the atmosphere

and the power response of a contrast-limited optoelectic system are analyzed

the apparent contrast model of a target is developed

and the detection range equation dependent on the aerosol extinction coefficient and range parameter are derived. Secondly

other parameters such as temperature difference and emissivity of target and sky

molecular absorptive transmittance

instantaneous field of view (IFOV)

contrast threshold and radiant wavelength are discussed in detail. Finally

the numerical simulations related to infrared point-target detection range are executed using typical atmospheric data output form LOWTRAN7 code.

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Keywords

references

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