Optical Head For Digital Audio Disks (DAD)

Tohru Musha; Kenichi Itoh; Tsutomu Shibata

doi:10.1117/12.933374

27 May 1982 Optical Head For Digital Audio Disks (DAD)

Tohru Musha, Kenichi Itoh, Tsutomu Shibata

Proceedings Volume 0329, Optical Disk Technology; (1982) https://doi.org/10.1117/12.933374
Event: 1982 Los Angeles Technical Symposium, 1982, Los Angeles, United States

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.

Citation Download Citation

Tohru Musha, Kenichi Itoh, and Tsutomu Shibata "Optical Head For Digital Audio Disks (DAD)", Proc. SPIE 0329, Optical Disk Technology, (27 May 1982); https://doi.org/10.1117/12.933374

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