Patent ID: 7515165
Filing Date: 2009-04-07
Classification: G11B

Abstract:
1. A method for calibrating a laser power in an optical disc drive, comprising the steps of: creating a plurality of marked segments of a calibration pattern on a label surface of an optical disc with a laser in the optical disc drive, the marked segments being created by the application of assorted quanta of radiant energy from the laser; measuring a reflectivity of the marked segments created with each quantum of radiant energy; determining a plurality of power settings for the laser for writing a label based upon the reflectivities measured for each of the marked segments for each quantum of radiant energy; and establishing a grey scale that employs the power settings to create a plurality of pixels of an image, wherein each of the settings of the laser power applies a corresponding one of the quanta of radiant energy to a respective one of the pixels.