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- W2031510983 abstract "For DVD/CD compatibility, a non-periodic phase structure (NPS) has been developed, consistent of a limited number of wide zones. Sufficient correction of the spherical aberration due to the combination of a DVD objective lens and a CD cover layer thickness is achieved. Two options have been worked out for better definition of the numerical aperture for CD. Tests of these options with a separate phase plate in combination with a standard DVD lens showed good performance, with slightly larger tilt margins than for the conventional solution. The NPS has been implemented in a glass/2P objective lens, to obtain a lens compatible for DVD + RW and CD - RW. With this lens, read and write tests of both DVD and CD were successful." @default.
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- W2031510983 date "2002-01-15" @default.
- W2031510983 modified "2023-09-23" @default.
- W2031510983 title "<title>Nonperiodic phase structures in optical disk systems</title>" @default.
- W2031510983 doi "https://doi.org/10.1117/12.453395" @default.
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