Write intensity calibration of a recording beam by reading a tes

Details Write intensity calibration of a recording beam by reading a tes Write intensity calibration of a recording beam by reading a tes

1995-02-10

1997-04-01

Epps, Georgia Y.

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, 3692753, G11B 700

Patent

active

056173997

ABSTRACT:
Disclosure is given of a device and method for recording by means of a radiation beam user information on a record carrier. The user information is written in the form of optically detectable marks in concentric tracks. The tracks are subdivided into sectors. The record carrier used has ring-shaped zones. Within these zones lie the sectors aligned seen in radial direction. For writing the marks in the tracks, a write intensity of the radiation beam is set to a determined set value. For this purpose, a test information pattern is written in a buffer sector which is situated on an edge of a zone. Then the test information pattern is read back during which operation the test information pattern is converted to a corresponding test data pattern. Based upon the test data pattern a set value for the write intensity is determined.

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