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Proceedings Paper

Optical Head For Digital Audio Disks (DAD)
Author(s): Tohru Musha; Kenichi Itoh; Tsutomu Shibata
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Paper Abstract

A novel optical head for digital audio disks has been successfully developed. The head consists of a GaAlAs laser diode, a quadrant PIN photodiode and a single-beam optical system for focusing and radial tracking. All of the data (RF), focusing, and radial tracking signals are derived from a single quadrant PIN photodiode. Focusing and radial tracking servocontrol of the head are characterized by two-dimensional actuation of an objective lens. The detection method of the error signals and their dependence upon both the movement of the objective lens and the tilt of the disk are described.

Paper Details

Date Published: 27 May 1982
PDF: 8 pages
Proc. SPIE 0329, Optical Disk Technology, (27 May 1982); doi: 10.1117/12.933374
Show Author Affiliations
Tohru Musha, Olympus Optical Co., Ltd. (Japan)
Kenichi Itoh, Olympus Optical Co., Ltd. (Japan)
Tsutomu Shibata, Olympus Optical Co., Ltd. (Japan)

Published in SPIE Proceedings Vol. 0329:
Optical Disk Technology
Robert A. Sprague, Editor(s)

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