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Proceedings Paper

LCD diffractive element design to handle multiple disk thicknesses
Author(s): Mark O. Freeman; Hsi-Fu Shih; Yuan-Chin Lee; Jau-Jiu Ju
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Paper Abstract

We describe the design of a single diffractive LCD element placed adjacent to the objective lens that can be addressed to provide the required spherical aberration (SA) compensation for a plurality of disk substrate thicknesses. It is now commonplace that optical disk drives must be able to handle disks of more than one substrate thickness. The major problem is compensating for the SA introduced when the highly corrected objective lens is used with a disk substrate thickness other than that which it was specifically designed for. An abundance of methods for solving this problem in the specific case of CD/DVD backward compatibility exist in the literature; we use an active device to extend this to include HD-DVD as well.

Paper Details

Date Published: 6 July 2000
PDF: 11 pages
Proc. SPIE 4081, Optical Storage and Optical Information Processing, (6 July 2000); doi: 10.1117/12.390514
Show Author Affiliations
Mark O. Freeman, Industrial Technology Research Institute (Taiwan)
Hsi-Fu Shih, Industrial Technology Research Institute (Taiwan)
Yuan-Chin Lee, Industrial Technology Research Institute (Taiwan)
Jau-Jiu Ju, Industrial Technology Research Institute (Taiwan)

Published in SPIE Proceedings Vol. 4081:
Optical Storage and Optical Information Processing
Han-Ping D. Shieh; Tomas D. Milster, Editor(s)

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