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Device for calculating diffraction efficiencies of a diffraction lens, lens with grating element, and optical system for reading
Device for calculating diffraction efficiencies of a diffraction lens, lens with grating element, and optical system for reading
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机译:用于计算衍射透镜的衍射效率的装置,具有光栅元件的透镜以及用于读取的光学系统
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摘要
A device for calculating diffraction efficiencies of a diffraction lens divided into a plurality of regions, each region comprising at least one grating ring, comprises a first memory for storing information about diffraction efficiencies of the regions; a second memory for storing information about weights corresponding to the regions; and a first processor for retrieving information from the first and the second memory, and calculating diffraction efficiencies of the entire diffraction lens using the formula ]]>wherein: j: integer indicating the order of diffraction lightEj: diffraction efficiency for j-th order diffraction light of the diffraction lensM: positive integer (M1) indicating the number of regions for which the diffraction efficiency is calculatedm: index of the region for which the diffraction efficiency is calculatedηmj: diffraction efficiency for the j-th order diffraction light of the m-th region (stored in the first memory)Wm: weight for the m-th region (stored in the second memory means).;Thus, the diffraction efficiency of the diffraction lens can be calculated easily.
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