A novel tracking servo system for multi-types of DVD with phase-shift DPP method

Author

Ueyama, Tetsuo ; Sakai, Keiji ; Kurata, Yukio

Author_Institution

Precision Technol. Dev. Center, Sharp Corp., Nara, Japan

fYear

2002

fDate

2002

Firstpage

1

Lastpage

3

Abstract

Various kinds of DVD such as DVD-R/RW, +R/RW and -RAM (2.6 GB and 4.7 GB) are on the market and some next generation optical disks such as Blu-Ray disk are set to appear in the near future. The development of a read/write pick-up for the various kinds of disk is thus expected. In this paper, we propose a new tracking servo system named phase-shift differential push-pull (PS-DPP) method which is not dependent on track pitch and the position of the sub-beams. This system is applicable for all kinds of DVD. This paper describes the concept of PS-DPP, the design of the new inclined multidivision phase-shift grating, and the simulated and the experimental results of its push-pull offset compensation effect.

Keywords

diffraction gratings; digital versatile discs; optical phase shifters; servomechanisms; tracking; 2.6 GB; 4.7 GB; Blu-Ray disk; DVD types; DVD+R/RW; DVD-R/RW; DVD-RAM; differential push-pull method; multidivision phase-shift grating; optical disks; phase-shift DPP method; push-pull offset compensation effect; read/write pick-up; simulated results; sub-beam positions; track pitch; tracking servo system; Brightness; DVD; Detectors; Diffraction; Gratings; Interference; Optical sensors; Phase detection; Servomechanisms; Stimulated emission;

fLanguage

English

Publisher

ieee

Conference_Titel

Optical Memory and Optical Data Storage Topical Meeting, 2002. International Symposium on

Print_ISBN

0-7803-7379-0

Type

conf

DOI

10.1109/OMODS.2002.1028695

Filename

1028695