Patent ID: 6226238
Filing Date: 2001-05-01
Classification: G11B

Abstract:
An optical disc master recording device, comprising:an objective lens for gathering a recording light irradiating an optical disc master;a solid immersion lens for further converging the recording light gathered by said objective lens;first drive means for driving said objective lens to a radial direction of said optical disc master;second drive means for driving said solid immersion lens to the radial direction of said optical disc master;means for determining a center position of said objective lens from a reference position in said radial direction;means for determining a center position of said solid immersion lens from the reference position in said radial direction;means for calculating a spot position of said recording light on said optical disc master according to the center positions of said objective lens and said solid immersion lens; andcontrol means for controlling said first and second drive means so as to approach the calculated spot position to a target spot position.