Measurement of the period of straight interference fringes and its application in phase detection

CHEN Feng-chao; HUANG Zuo-hua; LI Rong

The period of interference fringes is an important parameter in precision measurement.In order to detect the period of interference fringes simply and fast but not inaccurately,a simpler and practical digital image processing algorithm was adopted to detect the period of interference fringes.The image data processing software was designed on the MATLAB platform and the factors affecting the measurement accuracy of the period of fringes were analyzed.The demand of the fringes inclination was given.The algorithm was used in the detection of phase-plate,and the phase of the phase-plate was acquired.The precision of phase detection reached λ/20~λ/50 or π/10~π/25.This result is largely helpful to the thickness and refractive index detection of the phase object.

Corresponding author: HUANG Zuo-hua, zuohuah@scnu.edu.cn;

1. School of Physics and Telecommunication Engineering, South China Normal University, Guangzhou 510006, China

Received Date: 2006-11-24

Accepted Date: 2007-01-29

Available Online: 2008-02-25

Abstract: The period of interference fringes is an important parameter in precision measurement.In order to detect the period of interference fringes simply and fast but not inaccurately,a simpler and practical digital image processing algorithm was adopted to detect the period of interference fringes.The image data processing software was designed on the MATLAB platform and the factors affecting the measurement accuracy of the period of fringes were analyzed.The demand of the fringes inclination was given.The algorithm was used in the detection of phase-plate,and the phase of the phase-plate was acquired.The precision of phase detection reached λ/20~λ/50 or π/10~π/25.This result is largely helpful to the thickness and refractive index detection of the phase object.

HTML

Reference (11)

[1]	LI W Ch,GU J Q,WANG Y P.On-line measurement of fringe space in doublebean interference[J].College Physics,2003,22(8):28-30(in Chinese).
[2]	ZHAO Y L,XU Zh L,LI K D.Laser micro-displacement measurement system based on CCD[J].Laser Technology,2003,27(1):73-75(in Chinese).
[3]	ZHENG Sh Y,WANG G J.Fringe division and count of michelson interferometer[J].Physics Experimentation,2001,21(9):39-41(in Chinese).
[4]	NASCOV V,DOBROIU A,APOSTOL D,et al.1-D algorithm for automatic fringe spacing measurement in a straight equispaced parallel fringe pattern[J].Proc SPIE,2000,4068:290-296.
[5]	SONG J M,SHI D F.A fast algorithm for analysis of interference fringes[J].Journal of Huazhong University of Science Technology,2001,29(S1):35-37(in Chinese).
[6]	SONG J M,SHI D F.Fizeau wavemeter for laser wavelength measurement[J].Chinese Journal of Quantum Electronics,2001,18(3):224-227(in Chinese).
[7]	YANG L H,SHI H F,CHEN Zh L,et al.Arithmetic to process themach-zehnder interference fringe patterns collected by CCD[J].Journal of Applied Optics,2005,26(2):40-42(in Chinese).
[8]	ZHANG L,LIU S N,LIN D Y,et al.The progress of extracting phase information based on spatial carrier fringe pattern analysis[J].Laser Technology,2005,29(1):90-93(in Chinese).
[9]	FAN Zh G,LI R Sh,ZUO B J,et al.The study of pre-processing methods for the low contrast and uneven interferogram[J].Optical Technique,2002,28(1):41-43(in Chinese).
[10]	SUN Zh N,LI P Sh,QIANG X F,et al.Dynamic measurement technique for optic fiber interference fringe[J].Opto-electronic Engineering,2001,28(3):54-56(in Chinese).
[11]	HUANG Z H,CHEN F Ch.A new method of scanning image forphase objects[J].Proc SPIE,2006,6150:301-305.

Measurement of the period of straight interference fringes and its application in phase detection

Abstract

References

Proportional views

通讯作者: 陈斌, bchen63@163.com

Proportional views