Diffraction Mathematical Model of a Laser Speckle Interferometer of Transverse Displacements of a Scattering Object

IF 1.1 4区 物理与天体物理 Q4 PHYSICS, APPLIED
L. A. Maksimova, N. Yu. Mysina, B. A. Patrushev, V. P. Ryabukho
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Abstract

On the basis of diffraction transformations of wave fields, a mathematical model of a speckle interferometer of transverse displacements of a scattering object has been developed and numerical modeling of speckle-modulated interference patterns and signals at the output of the interferometer has been performed. Numerical calculations of the spatial distribution of complex amplitudes of wave fields in an interferometer were used for modeling when the displaced scattering surface was illuminated by two obliquely incident laser Gaussian beams. A statistical numerical experiment was performed to determine the measurement error of the scattering surface displacement caused by the change of realizations of interfering speckle fields. The simulation results are in good agreement with the results of experimental studies of transverse displacements in the range up to 600 micrometers.

Abstract Image

散射物体横向位移激光斑点干涉仪的衍射数学模型
在波场衍射变换的基础上,建立了散射物体横向位移斑点干涉仪的数学模型,并对干涉仪输出端的斑点调制干涉图案和信号进行了数值建模。当两个斜向入射的激光高斯光束照射位移散射表面时,对干涉仪中波场复振幅的空间分布进行了数值计算。进行了统计数值实验,以确定干涉斑点场的实现变化引起的散射表面位移测量误差。模拟结果与 600 微米范围内横向位移的实验研究结果十分吻合。
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来源期刊
Technical Physics
Technical Physics 物理-物理:应用
CiteScore
1.30
自引率
14.30%
发文量
139
审稿时长
3-6 weeks
期刊介绍: Technical Physics is a journal that contains practical information on all aspects of applied physics, especially instrumentation and measurement techniques. Particular emphasis is put on plasma physics and related fields such as studies of charged particles in electromagnetic fields, synchrotron radiation, electron and ion beams, gas lasers and discharges. Other journal topics are the properties of condensed matter, including semiconductors, superconductors, gases, liquids, and different materials.
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