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Proceedings Paper

High-density HDVD system using visible laser diode
Author(s): Yoichi Tsuchiya; Hitoshi Terasaki; Yoshihiko Morita; Osamu Ota
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Paper Abstract

We have presented a high density MUSE videodisc with 60 minutes of playback time per side. It has been developed by doubling the disc recording density. We have continued examining the system mainly the optical pickup and the signal parameters and we determined the newly specifications. To reduce the influence of uneven thickness and tilt of disc we changed an N. A. of the objective lens to 0. 55 and to make the optical pickup smaller we employed a small packaged ( $ 5. 6mm) visible laser diode. The visible laser diode has a low aspect ratio ( 0 32 0 11 0 / 0 2. 9 ). And to make the SN ratio of the playback signal higher we widened the FM deviation and lowered the FM carrier frequency. Under new conditions we made PMMA replica discs. As a result a high quality played back image without crosstalk noise was obtaind. 1.

Paper Details

Date Published: 12 August 1992
PDF: 7 pages
Proc. SPIE 1656, High-Resolution Sensors and Hybrid Systems, (12 August 1992); doi: 10.1117/12.135906
Show Author Affiliations
Yoichi Tsuchiya, SANYO Electric Co., Ltd. (Japan)
Hitoshi Terasaki, SANYO Electric Co., Ltd. (Japan)
Yoshihiko Morita, SANYO Electric Co., Ltd. (Japan)
Osamu Ota, SANYO Electric Co., Ltd. (Japan)


Published in SPIE Proceedings Vol. 1656:
High-Resolution Sensors and Hybrid Systems
Morley M. Blouke; Winchyi Chang; Laurence J. Thorpe; Rajinder P. Khosla, Editor(s)

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