摘要
本文介绍了电子散斑干涉 (ESPT)原理、相移技术方法。针对散斑条纹图中高频项对于相位计算的干扰 ,对相移算法提出了 2种修正的方法。对简支梁进行了位移场的测量 ,并与有限元 (FEM)计算结果进行对比 ,证明了改进的相移技术在
In the research of phase-shifting methods in ESPI, two new kinds of improvement algorithms about phase-shifting are presented to reduce the interference of high frequency terms in speckle pattern during phase calculation. In order to prove the reliability of the improved phase-shifting algorithms, typical beam is measured by using ESPI and improved phase-shifting algorithms. The experimental results are offered. The beam is also calculated by using finite element method (FEM). The comparison between experiment and calculation shows that the improved phase-shifting algorithms are effective in ESPI.
出处
《光电子．激光》
EI
CAS
CSCD
北大核心
2001年第11期1174-1176,共3页
Journal of Optoelectronics·Laser
