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首页> 外文会议>International Conference on Correlation Optics; 20030916-20030919; Chernivtsi; UA >Compact optical system for measuring linear and angular displacement of solid structures
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Compact optical system for measuring linear and angular displacement of solid structures

机译：紧凑型光学系统，用于测量实体结构的线性和角位移

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摘要

We present a compact, low-cost optical method for detection of in-plane speckle translation, which e.g. could be a measure of in-plane translation or rotation of a solid structure. The speckles are produced by illuminating a non-specular target surface with coherent light. The scattered light propagates through free-space to the sensor inlet. The sensor is based on a lenticular array, which implements a narrow spatial band-pass filter, acting on the translating speckle patterns. The sensor detects speckle translation, which for the given configuration can be caused to detect both translation and rotation of the target. The presented free space propagation design can provide a sensor with no direct sensitivity on the working distance. The electrical signals from the sensor are processed with a digital algorithm, based on zero-crossings detection to provide real-time displacement measurements. The spatial filter of the sensor is characterised here, and the precision of the sensor, integrated with a processor, which applies zero-crossing detection to the signal, is considered.
机译：我们提出了一种用于检测平面内斑点平移的紧凑，低成本的光学方法，例如可以衡量实体结构在平面内的平移或旋转。通过用相干光照射非镜面目标表面来产生斑点。散射的光通过自由空间传播到传感器入口。该传感器基于双凸透镜阵列，该双凸透镜阵列实现了狭窄的空间带通滤波器，并作用于平移的斑点图案。传感器检测斑点平移，对于给定的配置，可以使斑点检测目标的平移和旋转。提出的自由空间传播设计可以为传感器提供对工作距离没有直接灵敏度的传感器。来自传感器的电信号采用基于零交叉检测的数字算法进行处理，以提供实时位移测量。这里对传感器的空间滤波器进行了表征，并考虑了与处理器集成的传感器的精度，该处理器对信号进行过零检测。

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