A New Three Dimension PLMR Imaging System

机译：新型三维PLMR成像系统

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We are developing a new active three Dimension (3D) laser range imaging system based on a pulse light-source and a modulated receiver (PLMR). A double-frequency YAG laser emits light pulses, which are expanded to light cones, with a frequency of 60Hz. A light pulse can illumine a full scene and a modulated image intensifier micro-channel plate (MCP) selects the reflected light with proper optical imaging devices. A Charge Coupled Device (CCD) receives the MCP output signal and generates an intensity image, and two modulated avalanche photo diodes (APD) collects the light splitting from the light pulse as correct intensified values for the intensity image. The system generates a 3D image, which needs a minimum of two different intensity images. These intensity images are obtained with or without illumination of light pulse and with different modulation applied to the MCP. The above imaging times are equal and relate to detection range. We present the best combination of the modulations and illumination conditions, in the meaning of minimum variance, and the relative theoretical analyses. Detection range, measurement resolution and scan frame rate of the system are given considering the influence of background light and circuit noise. Comparing to other 3D imaging systems, our system has the advantage of achieving both long measurement range and high spatial resolution. Potential applications to industry and military of the 3D laser imaging system are also presented.

机译：我们正在开发一种基于脉冲光源和调制接收器（PLMR）的新型有源3D（3D）激光测距成像系统。 YAG双频激光发射的光脉冲扩展为光锥，频率为60Hz。光脉冲可以照亮整个场景，并且调制图像增强器微通道板（MCP）通过适当的光学成像设备选择反射光。电荷耦合器件（CCD）接收MCP输出信号并生成强度图像，并且两个调制雪崩光电二极管（APD）收集从光脉冲中分离出来的光，作为强度图像的正确增强值。系统生成3D图像，至少需要两个不同强度的图像。这些强度图像是在有或没有光脉冲照射的情况下获得的，并且将不同的调制应用于MCP。上述成像时间相等并且与检测范围有关。在最小方差的意义上，我们提出了调制和照明条件的最佳组合，并进行了相关的理论分析。考虑到背景光和电路噪声的影响，给出了系统的检测范围，测量分辨率和扫描帧率。与其他3D成像系统相比，我们的系统具有实现长测量范围和高空间分辨率的优势。还介绍了3D激光成像系统在工业和军事上的潜在应用。

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来源
《ICO20: Optical Devices and Instruments》|2005年|P.60241A.1-60241A.7|共7页
会议地点 Changchun(CN)
作者
Xiuda Zhang; Huimin Yan; Minmin Zheng;
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作者单位

National EngineeringTechnology Research Center for Optical Instrument, National Key Laboratory of Modern Optical Instrumentation, Department of Optical Engineering, Zhejiang University, Hangzhou Zhejiang 310027, China;

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会议组织
原文格式 PDF
正文语种 eng
中图分类光学仪器;
关键词
PLMR; 3D laser range imaging system; pulse; modulation; MCP;

机译：PLMR; 3D激光测距成像系统;脉冲;调制; MCP;

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A New Three Dimension PLMR Imaging System

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