分波前干涉法中空间互相关函数的传输
Propagation of cross-correlation function in dividing-wavefront interferometry
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摘要: 在光学干涉技术中,被检信息主要包含在干涉波面的互相关函数中,并最终体现为干涉场强度分布的调制。由Fresnel衍射理论出发,运用Collins公式,分析了分波前干涉法中空间互相关函数的传递性质。得到了用光线矩阵元表示的空间互相关函数传输公式,并以此对迈克耳逊干涉仪和横向剪切干涉仪中的干涉图强度分布进行了分析。Abstract: In interferometry, the interesting information is mostly concerned in cross-correlation function (CCF), which will generate the modulation of interference patterns. So with the Fresnel diffraction theory and Collins equation, the propagation of CCF in dividing-wavefront interferometry is studied in this paper. And the formula about its propagation in terms of optical matrix elements is given. The intensity distribution of interference patterns in Mechelson and Shearing Interferometer is also analyzed.
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Key words:
- cross-correlation function /
- propagation /
- interference patterns
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