PORTADORA DE GRABACION QUE CONTIENE INFORMACION EN UNA ESTRUCTURA DE INFORMACION DE REFLEXION DE RADIACION OPTICAMENTE LEGIBLE

摘要

A record carrier is described having an optically readable radiation-reflecting information structure, comprising information areas arranged in information tracks, which areas are spaced from each other by intermediate areas, the information areas having oblique walls. It is demonstrated that a suitable information signal and a suitable positional error signal are obtained if the angle of inclination of the walls of the information area lies between 65 DEG and 85 DEG and the phase depth of the information areas lies between 95 DEG and 140 DEG .