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Proceedings Paper

Dual focus optical head for 0.6-mm and 1.2-mm disks
Author(s): Yoshiaki Komma; Kenichi Kasazumi; Seiji Nishino; Sadao Mizuno; Yoshihiro Kanda; Hideki Hayashi
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Paper Abstract

We propose a dual focus optical head with a holographic optical element (HOE) which compensates for spherical aberration, allowing it to read both 0.6 mm disks and 1.2 mm disks. The thin disk is read using transmitted light and the thick disk is read using +1st order diffracted light of the blazed HOE. The characteristics of the focused spot, the servo signal detection and the signal of the Compact Disc indicate that both disks can be read by the dual focus optical head.

Paper Details

Date Published: 12 October 1994
PDF: 7 pages
Proc. SPIE 2338, 1994 Topical Meeting on Optical Data Storage, (12 October 1994); doi: 10.1117/12.190195
Show Author Affiliations
Yoshiaki Komma, Matsushita Electric Industrial Co., Ltd. (Japan)
Kenichi Kasazumi, Matsushita Electric Industrial Co., Ltd. (Japan)
Seiji Nishino, Matsushita Electric Industrial Co., Ltd. (Japan)
Sadao Mizuno, Matsushita Electric Industrial Co., Ltd. (Japan)
Yoshihiro Kanda, Matsushita Electric Industrial Co., Ltd. (Japan)
Hideki Hayashi, Matsushita Electric Industrial Co., Ltd. (Japan)


Published in SPIE Proceedings Vol. 2338:
1994 Topical Meeting on Optical Data Storage

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