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为了符合实际加工情形 ,推导了梯形位相光栅衍射效率 ,设计其用作 DVD光学头分光束器件时的各参数 ,并分析推导了表面粗糙度对衍射效率的影响
In order to meet the actual machining situation, the diffraction efficiency of the trapezoidal phase grating was deduced, and the parameters of the laser beam splitter were designed. The influence of the surface roughness on the diffraction efficiency was analyzed and derived