• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Applied optics >Micro-displacement by Means of Optoelectronic Nonlinear Joint Transform Correlation of Speckle Pattern
【24h】

Micro-displacement by Means of Optoelectronic Nonlinear Joint Transform Correlation of Speckle Pattern

机译：光斑图形的光电非线性联合变换相关的微位移

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Two objective speckle patterns are obtained--one before and one after the object has been moved--and are placed in the input plane of an optoelectronic nonlinear joint transform correlator. Nonlinear transformation of the joint power spectrum permits a sharper correlation peak and a high signal-to-noise ratio. The autocorrelation peak coordinates of the first pattern are set as a reference for measuring displacements of the cross-correlation peak, and also, the calibration of the measurement system is performed. It is well known that speckle can be regarded as a random spatial carrier in which information on the shape and position of the diffusing surface is encoded. The correlation of speckle patterns is highly appropriate for measuring displacements of tens of micrometers.↑(1,2) In this work, an alternative technique based on the correlation between two speckle patterns by means of a digital bipolar joint transform correlator↑(3) is presented. Initially the technique is described and then experimental results are shown.
机译：获得了两个客观的斑点图案-一个在物体移动之前，一个在物体移动之后-放置在光电非线性联合变换相关器的输入平面中。联合功率谱的非线性变换可以实现更尖锐的相关峰和高信噪比。设置第一图案的自相关峰坐标作为用于测量互相关峰的位移的参考，并且，还执行测量系统的校准。众所周知，斑点可以被视为随机空间载体，其中关于扩散表面的形状和位置的信息被编码。斑点图案的相关性非常适合于测量数十微米的位移。↑（1,2），这项工作是通过数字双极联合变换相关器↑基于两个斑点图案之间的相关性的替代技术↑（3）被表达。首先描述了该技术，然后显示了实验结果。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号