High-density HDVD system using visible laser diode

Yoichi Tsuchiya; Hitoshi Terasaki; Yoshihiko Morita; Osamu Ota

doi:10.1117/12.135906

12 August 1992 High-density HDVD system using visible laser diode

Yoichi Tsuchiya, Hitoshi Terasaki, Yoshihiko Morita, Osamu Ota

Proceedings Volume 1656, High-Resolution Sensors and Hybrid Systems; (1992) https://doi.org/10.1117/12.135906
Event: SPIE/IS&T 1992 Symposium on Electronic Imaging: Science and Technology, 1992, San Jose, CA, United States

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.

Citation Download Citation

Yoichi Tsuchiya, Hitoshi Terasaki, Yoshihiko Morita, and Osamu Ota "High-density HDVD system using visible laser diode", Proc. SPIE 1656, High-Resolution Sensors and Hybrid Systems, (12 August 1992); https://doi.org/10.1117/12.135906

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