Recording method and recording apparatus utilizing laser focusing element

摘要

A record head for applying laser light for drawing to a record medium and a record medium are supported so that they can be relatively moved in a main scanning direction and a sub scanning direction along the surface of the record medium through a move guide mechanism. The record head has a laser displacement sensor for detecting the distance to the light exposure position of the record medium in a noncontact manner. A record apparatus has an auto focus mechanism for correcting misregistration between the focus position of the laser light for drawing emitted from the record head and the record medium to a reference value based on the detection value of the laser displacement sensor, so that the focal distance between the record head and the record medium is held good regardless of deformation of a guide rail of the move guide mechanism, etc.