System and method for laser write power calibration
AssigneeHewlett-Packard Development Company, L.P.
InventorsKevin Colburn, Lawrence Taugher, D. Hanks
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Abstract
Systems and methods for calibrating laser write power in a digital media drive are disclosed. The method includes writing to a calibration portion on a digital media labeling layer with energy from a laser. The writing includes using at least two different laser power settings within the calibration portion. The method also includes measuring a parameter in the calibration segment, the parameter being indicative of the reflectivity of the labeling layer, and determining a calibrated laser write power setting based on the measured parameter and the at least two different laser write power settings.
Claims20
A method of calibrating laser write power, comprising:
- writing to a calibration portion on a digital media labeling layer with energy from a laser, the writing including using at least two different laser power settings within the calibration portion;
- measuring a parameter in the calibration portion, the parameter being indicative of the reflectivity of the labeling layer;
- and
- determining a calibrated laser write power setting based on the measured parameter and the at least two different laser write power settings.
A digital media drive, comprising:
- a sensor adapted to measure a parameter indicative of reflectivity of at least a calibration portion of a digital media labeling layer;
- and
- a controller in communication with the sensor and adapted to determine a calibrated laser power setting based on measurements of the parameter at points within the calibration portion associated with at least two different laser write power settings.
A digital media drive, comprising:
- means for measuring a parameter indicative of reflectivity of at least a calibration portion of a digital media labeling layer;
- and
- means for determining a calibrated laser power setting based on measurements of the parameter at points within the calibration portion associated with at least two different laser write power settings.
A program product, comprising machine readable program code for causing a machine to perform the following method steps:
- writing to a calibration portion on a digital media labeling layer with energy from a laser, the writing including using at least two different laser power settings within the calibration portion;
- measuring a parameter in the calibration portion, the parameter being indicative of the reflectivity of the labeling layer;
- and
- determining a calibrated laser write power setting based on the measured parameter and the at least two different laser write power settings.
Dependencies are inferred from the claim text.