摘要
用电子散斑干涉法建立了微小角度定量测量系统,根据散斑噪声的特点,计算散斑图像沿不同方向的投影及投影的调制度,调制度最大值投影的周期为干涉条纹的宽度.实验结果表明该方法最小可测量角度为10-5 rad.
A system for measuring micro-angle was built with electric speckle pattern interferome-try （ESPI） .The system included an optical imaging system and a simple and effective algorithm for reducing speckle noise and calculating the width of interference stripes according to the characteristics of the speckle noise .Interference stripes were integrated along different directions ,and their modula-tions were calculated .The width of the interference stripes was equal to the period of the projection when a modulation reached its maximum value .The experimental result indicated that the minimum angle was 10-5 rad using this system .
出处
《物理实验》
2014年第7期6-9,共4页
Physics Experimentation
基金
国家自然科学基金资助(No.61275214)
广东省自然科学基金资助(No.S2013010012973)
关键词
电子散斑
微小角度
干涉条纹
散斑噪声
electronic speckle
micro-angle
interference stripe
speckle noise
