Patent ID: 7072252
Filing Date: 2006-07-04
Classification: G11B

Abstract:
1. An optical recording device that is equipped with a focus control system for performing a focus control operation to focus light emitted from a light source onto a recording face of an optical recording medium, said device comprising: a focus offset value setting unit for sequentially setting a focus offset value from a plurality of offset values; an adder unit for using the focus offset values set by the focus offset value setting unit to adjust the focus control system; a light quantity setting unit for setting the quantity of recording light, which is emitted from the light source, at each of a plurality of predetermined values indicating the quantity of recording light for each of the focus offset values set by the focus offset value setting unit; a recording unit for recording information on the optical recording medium using the quantity of recording light set by the light quantity setting unit with the focus offset value set by the focus offset value setting unit; an error rate measuring unit for measuring an error rate in information reproduced from the information recorded by the recording unit; and an optimum focus offset value determining unit for determining an optimum focus offset value based on the error rate measured by the error rate measuring unit.