期刊文献+

基于条纹中心线的载波散斑条纹解调方法 被引量:1

A Method to Modulate Carrier-wave Speckle Pattern Fringe Based on Fringe Center
下载PDF
导出
摘要 针对传统傅里叶变换法在处理含有多突起的载波散斑条纹图时,由于存在频谱展宽会出现严重的解调相位失真,提出了一种基于条纹中心线的载波散斑条纹解调方法.根据载波调制时所采用平行调制方式和倾斜调制方式,分别从理论上对相关的中心线解调法进行数学推导,并进一步采用最小二乘三次曲面拟合法获得被测物面全场的离面位移信息.实验结果表明:利用上述中心线解调法和曲面拟合法能解调出复杂的载波条纹图,并获得具有亚像素定位准确度、连续光滑的全场离面位移信息. There are noticeable demodulation phase errors for spectrum expanding when the traditional Fourier transform method is used to evaluate the carrier-wave interfergram fringe pattern including multi-protuberances. A new method to modulate carrier-wave speckle pattern fringe based on finge center was proposed. According to the parallel modulation method and gradient modulation method, the corresponding mathematical reasoning of fringe center modulation method was carried out in theory respectively. Then least-square cubic surface fitting algorithm was adopted to evaluate the whole out-of-plane displacement of object surface. Experimental results show that the above-mentioned modulation method and surface fitting method could not only modulate complex carrier-wave fringe pattern, but also obtain alabastrine whole out-of-plane displacement information with sub-pixel location precision and continuum.
作者 林振衡
出处 《光子学报》 EI CAS CSCD 北大核心 2013年第1期19-23,共5页 Acta Photonica Sinica
基金 福建省自然科学基金(Nos.2011J01363 2012D115) 福建省教育厅科技项目(Nos.JA12289 JK2012047)资助
关键词 载波电子散斑干涉 解调 条纹中心线 曲面拟合 最小二乘 CESPI Modulation Fringe center Surface fitting Lest-squares
  • 相关文献

参考文献16

二级参考文献128

共引文献278

同被引文献8

引证文献1

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部