首页> 外文期刊>Applied optics >Simulation and control of narcissus phenomenon using nonsequential ray tracing. II. Line-scan camera in 7-11 (mu)m waveband
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Simulation and control of narcissus phenomenon using nonsequential ray tracing. II. Line-scan camera in 7-11 (mu)m waveband

机译:使用非连续光线跟踪模拟和控制水仙现象。二。 7-11μm波段的线扫描相机

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摘要

A nonsequential ray tracing technique is used to calculate the narcissus signature in infrared (IR) imaging cameras having cooled detectors operating in the 7-11 (mu)m waveband. Imaging cameras based on a one-dimensional linear detector array with a scan mirror are simulated. Circularly symmetric diffractive phase surfaces commonly used in modern IR cameras are modeled including multiple diffraction orders in the narcissus retroreflection path to correctly estimate the stray light return signal. An optical design example based on a step-zoom dual field of view optical system is discussed along with the performance curves to elaborate the modeling technique. Optical methods to minimize the narcissus return signal are explained, and modeling results presented. The nonsequential ray tracing technique is found to be an effective method to accurately calculate the narcissus return signal in complex IR cameras having diffractive surfaces.
机译:非连续射线追踪技术用于在红外(IR)成像相机中计算水仙特征,该红外(IR)成像相机具有在7-11μm波段工作的冷却探测器。模拟了基于带有扫描镜的一维线性检测器阵列的成像相机。对现代红外摄像机中常用的圆对称衍射相表面进行建模,使其在水仙回射路径中包含多个衍射级,以正确估计杂散光返回信号。讨论了基于步进变焦双视场光学系统的光学设计实例以及性能曲线,以详细阐述建模技术。解释了使水仙返回信号最小化的光学方法,并给出了建模结果。发现非连续光线追踪技术是在具有衍射表面的复杂IR摄像机中准确计算水仙返回信号的有效方法。

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  • 来源
    《Applied optics》 |2010年第8期|共11页
  • 作者

    M. Nadeem Akram;

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  • 正文语种 eng
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