An optical disk apparatus records information by irradiating a laser beam
from a pickup onto an optical disk. A scanning section scans the laser
beam relative to the optical disk. A recording control section controls
the scanning section to effect recording of information. A drawing
control section is provided for controlling the pickup and the scanning
section to effect drawing of a visible image on the optical disk
according to image information, such that the laser beam is changed
between a first intensity incapable of acting on the optical disk and a
second intensity capable of acting on the optical disk. A servo section
periodically detects the laser beam reflected back from the optical disk
when the laser beam has the first intensity, and servo-controls the
irradiating of the laser beam during the drawing of the visible image
based on the detection of the laser beam. The drawing control section
controls the pickup for forcibly changing the laser beam to the first
intensity from the second intensity when the second intensity is
maintained over a predetermined period pursuant to the image information,
thereby enabling the servo section to detect the laser beam having the
first intensity for continuing the servo-control.