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Proceedings Paper

Nonperiodic phase structures in optical disk systems
Author(s): Jorrit de Vries; Benno H. W. Hendriks
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Paper 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.

Paper Details

Date Published: 10 January 2002
PDF: 12 pages
Proc. SPIE 4342, Optical Data Storage 2001, (10 January 2002); doi: 10.1117/12.453395
Show Author Affiliations
Jorrit de Vries, Philips Optical Storage (Netherlands)
Benno H. W. Hendriks, Philips Research Labs. (Netherlands)

Published in SPIE Proceedings Vol. 4342:
Optical Data Storage 2001
Terril Hurst; Seiji Kobayashi, Editor(s)

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