Digital Moir? fringe scanning method for centering ring grating images
光学精密工程2002年10卷第1期 页码:19-24
作者机构:
华中科技大学机械学院仪器系,湖北 武汉,430074
作者简介:
基金信息:
国家自然科学基金项目无衍射光莫尔条纹二维直线度测量理论与技术研究(No.59805006)()
DOI:
中图分类号:O436.1
收稿日期:2001-03-23,
修回日期:2001-12-17,
网络出版日期:2002-02-15,
纸质出版日期:2002-02-15
稿件说明:
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赵斌. 环栅图像的数字莫尔条纹扫描定中方法[J]. 光学精密工程, 2002,(1): 19-24
ZHAO Bin. Digital Moir? fringe scanning method for centering ring grating images[J]. Editorial Office of Optics and Precision Engineering, 2002,(1): 19-24
ZHAO Bin. Digital Moir? fringe scanning method for centering ring grating images[J]. Editorial Office of Optics and Precision Engineering, 2002,(1): 19-24DOI:
Moire fringe scanning method of digital ring gratings is proposed. Instead of generating ring Moire fringe by superposition of real circular grating and nondiffractive beam
the author photographed the beam images into computer
and then superposed them with a digital circular grating
whose center position is close to the measured images. Changing the phase of digital grating can realize Moire fringe scanning. The global center of beam pattern can be calculated by multi-frame scanning images. Because the total data of pattern are used in calculation
the determination of center of the ring pattern with noise is realized with subelement sensitivity. Statistical analysis shows that this method features good anti-interference ability. The application of this method in the measurement of space straightness error is also introduced.