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首页> 外文会议>17th International Conference on Photoelectronics and Night Vision Devices May 27-31, 2002 Moscow, Russia >Calculation of utmost parameters of active vision system based on nonscanning thermal imager
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Calculation of utmost parameters of active vision system based on nonscanning thermal imager

机译：基于非扫描热像仪的主动视觉系统最大参数计算

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摘要

An active vision system (AVS) based on a non scanning thermal imager (TI) and CO_2 - quantum amplifier of the image is offered. AVS mathematical model within which investigation of utmost signal / noise values and other system parameters depending on the distances to the scene -the area of observation (AO), an illumination impulse energy (W), an amplification factor (K) of a quantum amplifier, objective lens characteristics, spectral band width of a cooled filter of the thermal imager as well as object and scene characteristics is developed. Calculations were carried out for the following possible operating modes of a discussed vision system: - an active mode of a thermal imager with a cooled wideband filter; an active mode of a thermal imager with a cooled narrowband filter; - passive mode (W = 0, K = 1) of a thermal imager with a cooled wideband filter. As a result of carried out researches the opportunity and expediency of designing AVS, having a nonscanning thermal imager, impulse CO_2 - quantum image amplifier and impulse CO_2- illumination laser are shown. It is shown that AVS have advantages over thermal imaging at observation of objects, temperature and reflection factors of which differ slightly from similar parameters of the scene. AVS depending on the W K product can detect at a distance of up to 3000..5000m practically any local changes (you are interested in ) of a reflection factor. AVS not replacing the thermal imaging allow to receive additional information about observation objects. The images obtained with the help of AVS are more natural and more easy identified than thermal images received at the expense of the object own radiation. For quantitative determination of utmost values of AVS sensitivity it is offered to introduce a new parameter - NERD - "radiation nose equivalent reflection factors difference". IR active vision systems of vision, as well as a human vision and vision systems in the near IR - range on the basis image intensifies provide obtaining the scene image having been irradiated with a source of illumination only at the expense of local differences in reflective properties. Such images are more natural and more easy identified than thermal images obtained at the expense of the scene own radiation.
机译：提供了基于非扫描热像仪（TI）和图像的CO_2-量子放大器的主动视觉系统（AVS）。 AVS数学模型，在该模型中，根据与场景的距离-观察区域（AO），照明脉冲能量（W），量子放大器的放大因子（K）来研究最大的信号/噪声值和其他系统参数，物镜特性，热成像仪冷却滤光片的光谱带宽以及物镜和场景特性。针对所讨论的视觉系统的以下可能操作模式进行了计算：-具有冷却宽带滤波器的热像仪的活动模式；具有冷却的窄带滤波器的热像仪的活动模式； -具有冷却宽带滤波器的热像仪的被动模式（W = 0，K = 1）。作为研究的结果，显示了设计具有无扫描热像仪，脉冲CO_2-量子图像放大器和脉冲CO_2-照明激光器的AVS的机会和便利性。结果表明，AVS在观察物体时具有优于热成像的优势，物体的温度和反射系数与场景的相似参数略有不同。取决于W K产品的AVS可以在最远3000..5000m的距离处检测到反射系数的任何局部变化（您感兴趣）。不替换热成像的AVS允许接收有关观察对象的其他信息。与以物体自身的辐射为代价接收的热图像相比，借助AVS获得的图像更自然，更容易识别。为了定量确定AVS灵敏度的最大值，建议引入一个新参数-NERD-“辐射鼻当量反射系数之差”。红外主动视觉系统以及基于近红外的人类视觉系统和视觉系统在图像增强的基础上，仅以牺牲反射特性的局部差异为代价，即可获得已被照明光源照射的场景图像。与以场景自身辐射为代价获得的热图像相比，此类图像更自然，更容易识别。

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