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Theoretical and experimental comparison of flash and accumulation mode in range-gated active imaging

机译：距离选通主动成像中闪光和累积模式的理论和实验比较

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摘要

Range-gated active imaging has significantly been improved in the recent past. Due to constraints imposed by the different types of sensors, systems using laser diodes as illumination sources are working in "accumulation" mode and systems using solid-state lasers are working in "flash" mode. Consequently, the type of source (diode or solid-state laser) gives basic differences in the behavior of the two types of systems. We systematically investigated the theoretical and practical differences between the two modes to point out their advantages and weaknesses. Parameters such as image quality, sensitivity to day light or stray light, fog penetration capacity, sensitivity to turbulence, and laser safety are examined. For comparative experimental purposes, we have built a range-gated active imaging system that allows the investigation of both illumination methods on the same sensor. We have carried out precise comparative studies between the two acquisition methods. Some differences are pointed out that have to be taken into account when designing a range-gated active imaging system in function of the desired performances. In particular, this work will help to design a new range-gated underwater active imaging System.
机译：最近，范围门控主动成像技术得到了显着改善。由于不同类型的传感器施加的限制，使用激光二极管作为照明源的系统正在“累积”模式下工作，而使用固态激光器的系统正在“闪光灯”模式下工作。因此，光源的类型（二极管或固态激光器）在两种系统的行为上给出了基本的区别。我们系统地研究了两种模式之间的理论和实践差异，以指出它们的优缺点。检查了诸如图像质量，对日光或杂光的灵敏度，雾穿透能力，对湍流的灵敏度以及激光安全性等参数。为了进行比较实验，我们建立了一个距离选通的主动成像系统，可以研究同一传感器上的两种照明方法。我们对两种采集方法进行了精确的比较研究。指出了一些根据期望性能设计距离选通的有源成像系统时必须考虑的差异。特别是，这项工作将有助于设计一个新的距离选通的水下主动成像系统。

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  • 来源
    《Optical engineering》 |2014年第4期|043106.1-043106.7|共7页
  • 作者

    Frank Christnacher; Martin Laurenzis; Stephane Schertzer;

  • 作者单位

    ISL-French-German Research Institute of Saint-Louis, Advanced Visionics and Processing, 5 rue du General Cassagnou, Saint-Louis 68301, France;

    ISL-French-German Research Institute of Saint-Louis, Advanced Visionics and Processing, 5 rue du General Cassagnou, Saint-Louis 68301, France;

    ISL-French-German Research Institute of Saint-Louis, Advanced Visionics and Processing, 5 rue du General Cassagnou, Saint-Louis 68301, France;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    active imaging; range-gating; accumulation imaging; flash imaging;

    机译：主动成像范围门控累积成像闪光成像;

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