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- W2385491132 abstract "Diffraction calculation is the basis of designing optical system of optical disk. Validity of scalar diffraction theory must be checked, because the size of information mark (pit) of optical disk is comparable with or smaller than the laser wavelength. The energy calculation error of scalar theory was investigated firstly. The error was as large as 19% for typical pit size. Then the polarization effect of incident wave was analyzed with coupled wave theory. It is found that the diffraction characteristic of TE and TM polarization is far from the result of scalar theory, and difference also exist between TE and TM polarization. The difference can be ascribed to the boundary condition of the electromagnetic field, and it will increase with the decrease of the pit width. The error of scalar diffraction theory is very large for DVD, and vector diffraction theory must be employed to get correct result." @default.
- W2385491132 created "2016-06-24" @default.
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- W2385491132 date "1999-01-01" @default.
- W2385491132 modified "2023-09-27" @default.
- W2385491132 title "Validity analysis of scalar diffraction theory in optical system of optical disk" @default.
- W2385491132 hasPublicationYear "1999" @default.
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