| 摘要 |
An optical disc master recording device can surely control an optical spot position even if an objective lens and SIL are attached to an optical head, and includes 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 the objective lens, first drive element driving the objective lens to the radial direction of the optical disc master, second drive element driving the solid immersion lens to the radial direction of the optical disc master, unit for determining a center position of the objective lens from a reference position in the radial direction, unit for determining a center position of the solid immersion lens from a reference position in the radial direction, circuit for calculating a spot position of the recording light on the optical disc master according to the center positions of the objective lens and the solid immersion lens, and control element for controlling the first and second drive element so as to approach the calculated spot position to the target spot position.
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