OPT-01 IN-PLANE ERROR SIGNAL DETECTION BY DIFFERENTIAL PUSH-PULL METHOD FOR OPTICAL RECORDING MEDIUM HAVING 2-DIMENSIONAL PERIODIC STRUCTURE(Optical Storage/Optical Devices for Storage I,Technical Program of Oral Presentations)

Abstract

Detection of error signals is a key issue in three-dimensional recording with electrical beam control. We propose an improved in-plane error signal detection method using two-dimensional differential push-pull method, which features a suppression of offsets caused by the tilts of an optical recording medium in the in-plane direction. The principle of this method has been experimentally demonstrated.