Dynamic information storage or retrieval – Storage or retrieval by simultaneous application of diverse... – Magnetic field and light beam
Reexamination Certificate
2005-02-04
2009-06-23
Feild, Joseph H (Department: 2627)
Dynamic information storage or retrieval
Storage or retrieval by simultaneous application of diverse...
Magnetic field and light beam
C369S047530
Reexamination Certificate
active
07551524
ABSTRACT:
A method of compensating for output variations in laser power output over time in a system using a laser to record visible marks on an optical disc, the method comprising (a) applying a test light beam from the laser to the optical disc to determine a test value of an optical parameter, (b) determining a difference between the test value and a predetermined reference value for the optical parameter, and (c) adjusting the laser power output to compensate for the difference.
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Colbum Kevin L.
Hanks D. Mitchel
Lipinski Greg J.
Taugher Lawrence N.
Van Brocklin Andrew L
Feild Joseph H
Gupta Parul
Hewlett--Packard Development Company, L.P.
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