OPTICAL RECORDING MEDIUM, MASTER DISK FOR MANUFACTURE OF OPTICAL RECORDING MEDIUM AND DEVICE FOR OPTICAL RECORDING AND REPRODUCING

摘要

PROBLEM TO BE SOLVED: To obtain reproducing characteristics of signals recorded in recording tracks and reproducing characteristics of wobble signals detected from wobbling grooves both in a high level while realizing higher recording density. SOLUTION: In the optical recording medium, wobbling grooves are formed along the recording tracks, and signals are recorded and/or reproduced in specified recording tracks while wobble signals are detected from the wobbling grooves. The wobbling grooves are formed as wobbling in a nearly trapezoid or square pattern.