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US 7,219,840 B2Granted
Calibrating fine actuator using a reference pattern
AssigneeHewlett-Packard Development Company, L.P.
InventorDarwin Mitchel Hanks
Life of this patent
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Abstract
A disc media marking systems and methods facilitate optical disc labeling through calibration of a fine actuator using a reference pattern.
Claims18
A processor-readable medium comprising processor-executable instructions configured for:
- scanning a reference pattern on a disc to create a table of coordinate data, wherein the reference pattern has a linear variation with the radius of the disc;
- and
- calibrating the gain of a fine actuator based on the table of coordinate data.
A processor-readable medium comprising processor-executable instructions configured for:
- scanning a sawtooth pattern on a non-data side of an optical disc;
- generating a reflective signal based on the scanning;
- converting a duty cycle of the reflective signal into a radius value;
- incrementing a DAC (digital to analog converter) count to a new DAC count;
- repeating the scanning, the generating, and the converting;
- and
- calculating a fine actuator gain based on the DAC counts and the radius values.
4 more elements
A method for calibrating a fine actuator comprising:
- generating a table of coordinate data by scanning a reference pattern on an optical disc;
- and
- calibrating the gain of a fine actuator based on the table of coordinate data.
Dependencies are inferred from the claim text.