[0004] 在上述文献中，周期性条纹由光源、正弦光栅(Sinusoidal Grating) 以及投影镜 组，构成投影装置而产生，并借此投影至待测物件的特定区域表面。
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【Key words】 Dense active depth from defocus； Local spatial frequency filtering； Contrast； Modulated sinusoidal grating；
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结合矩形光栅、正弦光栅等实例，进行了应用研究。
It deals with the research of their usage in relating with rectangle optical grating and sine optical grating ect.
假定输入为单频正弦光栅，对刷扫工作状态下线列CCD输出信号的频谱进行了分析。
For a linear array CCD in a push-bloom imaging system, on condition that the input signal is a sine pattern with single frequency, the output signal spectrum is analysed.
在第四章，根据标量衍射理论，首先讨论了两平面波干涉场的空间分布与平行投影正弦光栅的等价性。
In chapter 4, According to the theory of scalar diffraction, firstly, the equipollence of spatial distribution of the plane-wave interferential field and parallel projective sine grating is discussed.
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