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Influence of several grating sensor parameters on the modulation depth of moire signals under incoherent illumination

机译：非相干照明下几种光栅传感器参数对莫尔信号调制深度的影响

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摘要

Theoretical expressions for the modulation depth of moire signals under incoherent illumination are derived. Consequently, the modulation depth of a moire signal is related to the following factors: the geometric shape and the size of the light source; the diffraction effect of the grating, which relates to the number of lines in the grating; the line and the space ratio; the grating pair gap; the geometric shape and the size of the receiving window; etc. In addition, the influence of the grating pair on the period and the inclination of moire fringes under noncollimated illumination are discussed, and the changes in the moire signal modulation depth under noncollimated illumination with that under collimated illumination are made. Finally, some experimental results are given to verify the theoretical expressions. This research is useful for the actual design of grating sensors. (C) 1998 Optical Society of America. [References: 3]
机译：推导了非相干照明下莫尔信号调制深度的理论表达式。因此，莫尔信号的调制深度与以下因素有关：光源的几何形状和尺寸;以及光栅的衍射效应，与光栅中的行数有关;线和空间比;光栅对间隙;接收窗口的几何形状和大小;此外，讨论了光栅对对非准直照明下莫尔条纹的周期和倾斜度的影响，并给出了非准直照明与准直照明下莫尔信号调制深度的变化。最后，给出了一些实验结果以验证理论表达式。这项研究对于光栅传感器的实际设计是有用的。 （C）1998年美国眼镜学会。 [参考：3]

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