Support readable recording for recording information optically, method and apparatus for manufacturing said record carrier, apparatus for recording information in said recording medium, and apparatus for reading information in said recording medium.

摘要

A recorder (40) comprising a layer OF SENSITIVE RADIATION (43) on a substrate disc-shaped (42) and is provided an information area RECORDED PREPARED ACCORDING TO A SPIRAL FORM OR SAMPLES CONCENTRIC ROADS PREFORMED (41) . THE DISPLAYS A LANE VIA MODULATION the form of a radial wobble whose frequency is modulated by a signal position-information. In addition, an apparatus (1) is arranged to form the VIA during manufacture of the carrier wheel (40). When a signal of information (VI) IS RECORDED ON DISC CARRIER (40) and the recorded signal is read DEVICE demodulation FM (60) overlies the position signal-INFORMATION IP VARIATIONS IN THE BEAM EXPLORACIÑON ( 54,54A) produced by modulating LANE. ALSO. A clock signal FOR USE SPEED CONTROL-EXPLORATION IS COATED these variations in the scanning beam.