Method and apparatus for calibrating laser write power by averag

Details Method and apparatus for calibrating laser write power by averag Method and apparatus for calibrating laser write power by averag

1992-06-05

1994-08-23

Dzierzynski, Paul M.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369 54, 369 58, G11B 7125

Patent

active

053413601

ABSTRACT:
In an optical recording system employing a laser for writing digital data onto a storage medium, an apparatus and method for calibrating a laser to a power level which minimizes write errors. A calibration profile is generated by writing test data patterns onto the storage medium by using a number of different predetermined laser power levels. The test data patterns are then read back. The number of write errors is determined for each of the different laser power levels by comparing the written data patterns to the read back data patterns. The calibration profile denotes the number of write errors as a function of laser power levels. Next, an optimum laser power is determined corresponding to an average of an upper and a lower knee of the calibration profile. The laser is calibrated to this optimum power level.

REFERENCES:
patent: 4631713 (1986-12-01), Romeas et al.
patent: 4858219 (1989-08-01), Yoshikawa
patent: 4894817 (1990-01-01), Tanaka et al.
patent: 5050156 (1991-09-01), Barton
patent: 5182742 (1993-01-01), Ohmori et al.

Affiliated with

Also associated with

Rating

Method and apparatus for calibrating laser write power by averag does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for calibrating laser write power by averag, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for calibrating laser write power by averag will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-507950