Method and apparatus for driving light source by stored current

Details Method and apparatus for driving light source by stored current Method and apparatus for driving light source by stored current

1993-08-17

1996-07-23

Hindi, Nabil Z.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369100, G11B 700

Patent

active

055397204

ABSTRACT:
An optical information processing method according to the present invention includes a first step of supplying a driving current to a light source so as to emit a light beam, a second step of converging the light beam emitted from the light source and irradiating the converged light beam onto an optical recording medium, a third step of adjusting a focal point of the light beam on the medium, a fourth step of adjusting the driving current so that the power of the light beam is set to a predetermined value in a state in which the focal point was adjusted a fifth step of storing the value of the driving current which was adjusted in the fourth step, and a sixth step of supplying the current of the value stored in the fifth step to the light source so as to emit the light beam and scanning the medium by the light beam, and thereby recording, reproducing, or erasing information. An apparatus to embody the above method is also disclosed.

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