METHOD FOR DETECTING POSITION,INFORMATION RECORDER/REPRODUCER AND INFORMATION RECORDING MEDIUM

摘要

A servo pattern comprising a first burst region (62) and a second burst region (64) where figures such as circle or rectangle surrounded by some closed curve are arranged uniformly as pattern elements on a plane is recorded on a disc. The pattern elements of the servo pattern are arranged in the circumferential direction and radial direction of the disc such that the phase and the head position have a proportional relation at two frequency components of a reproduction signal. When the head position on a disc is detected, positional signals of two frequency components contained in the reproduction signal of a servo pattern are detected and added at some ratio to obtain an error−free positional signal.