A New Servo Method Which Increases Track Following Range Of A One-Beam Optical Head

S. Arai; I. Shibata; K. Ogawa; S. Ogawa

doi:10.1117/12.936111

10 November 1983 A New Servo Method Which Increases Track Following Range Of A One-Beam Optical Head

S. Arai, I. Shibata, K. Ogawa, S. Ogawa

Proceedings Volume 0421, Optical Disks Systems and Applications; (1983) https://doi.org/10.1117/12.936111
Event: 1983 Optical Mass Data Storage Conferences, 1983, Arlington, United States

Abstract

A simple and reliable optical head is needed for practical application of optical mass data storage. The so-called push-pull tracking method is widely used in pregrooved disc systems. A disadvantage of this tracking method is that track following range is limited to a few tens of microns, which is too little for practical use. The limited range is due to disc eccentricity, which displaces the axis of the reflected beam. The authors have overcome this problem by a new servo method which compensates electrically the undesirable influence by detecting the displacement from the driving signal of the tracking actuator, and have improved the track following range to 350 μm.

Citation Download Citation

S. Arai, I. Shibata, K. Ogawa, and S. Ogawa "A New Servo Method Which Increases Track Following Range Of A One-Beam Optical Head", Proc. SPIE 0421, Optical Disks Systems and Applications, (10 November 1983); https://doi.org/10.1117/12.936111

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