Patent · US Expired

Disc recording

US4027330A · kind A · utility

14Cited by

8References

7Claims

0Family size

Assignee

TED Bildplatten Aktiengesellschaft AEG-Telefunken-Teldec · CH

Inventors

Stefan Maslowski
Peter Huber · Neubiberg, DE
Horst Redlich · Berlin, DE

Key dates

Filing date	Mar 27, 1974
Grant date	May 31, 1977
Priority date	—
Expiry date	Mar 27, 1994

Classification

Technology area (CPC G)Physics
CPC primaryG11B7/125
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

A matrix to be used for fabricating disc shaped record carriers is produced by illuminating a photolacquer layer with a laser beam while the layer moves transverse to the beam axis and by controlling the beam so that it simultaneously produces a succession of spots modulated according to the information recorded and a continuous strip narrower than the spots and serving to provide a track guide for the scanning element of a playback device with which such a record carrier is to be used.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.