Efficient framework for the simulation of translational and rotational laser speckle displacement in optical sensor assemblies

Csencsics Ernst; Wolf Tobias; Schitter Georg

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Efficient framework for the simulation of translational and rotational laser speckle displacement in optical sensor assemblies

机译：Efficient framework for the simulation of translational and rotational laser speckle displacement in optical sensor assemblies

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摘要

The optimization and uncertainty analysis of laser-based optical sensors in the design phase is a challenging task due to the presence of stochastic laser speckle effects. We present an accurate, efficient, and versatile simulation framework for the design of optical sensor assemblies, capable of handling objective as well as subjective speckle effects. The framework integrates the stochastic nature of laser speckle with the deterministic properties of ray-tracing simulations, enabling the simulation of sensitivities to translational as well as rotational target motion and reliable performance estimation, even for more complex optical assemblies. To validate the simulation results for translation and rotation, they are compared against the experimental data of four speckle-based optical sensor assemblies as well as against analytical relations for speckle pattern motion. The accuracy of the developed framework is demonstrated by simulation errors for correlation peak shift of the speckle pattern of less than 2 mu m rms and 2.4 mu m rms for translation and rotation, respectively. For the center of gravity shift as additional simulation output for an integrated laser sensor for sensing translations in all three degrees of freedom, a simulation error of 2.6 mu m rms was obtained, which also lies well below the resolution of the designed optical sensor assemblies. (C) 2022 Society of Photo-Optical Instrumentation Engineers (SPIE)

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来源
《Optical Engineering》 |2022年第6期|061410-1-061410-14|共14页
作者
Csencsics Ernst; Wolf Tobias; Schitter Georg;
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作者单位

Tech Univ Wien;

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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
正文语种英语
中图分类光学仪器;
关键词
laser speckle; speckle simulation; triangulation sensor; displacement measurement; surface tracking; in-process measurement; design tool; DECORRELATION; PLATFORM; TRACKING; TOOL;

Efficient framework for the simulation of translational and rotational laser speckle displacement in optical sensor assemblies

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