Optical information recording apparatus

The optical information recording method which records a first information signal on an optical information recording medium, and which records a change from a predetermined light intensity level to other light intensity level, which is obtained from a micro equal interval step such that an inclination of the light intensity becomes substantially linear with respect to a second information signal and time by changing a light intensity of the laser beam source, on the optical information recording medium, and further includes a timing correcting step applied to the first information signal in accordance with a light intensity level, comprising the following steps of:

• a measuring step of measuring a laser intensity of the modulated laser beam;
• a control step of controlling a driving signal of the modulated laser beam;
• an invert operation step of measuring a characteristic of laser beam intensity with respect to a predetermined pair of amplitudes of the driving signal obtained by the measuring means and the control means, and carrying out an invert operation of the characteristic, and further, storing the invert operation value which is a driving signal corresponding to a certain light intensity;
• and
• a timing correction value determining step of determining a timing correction value relative to an intermediate light intensity level in a displacement period of linearly interpolating a timing value at a predetermined light intensity level, wherein
• in the invert operation step of storing an invert operation characteristic for making a desired light intensity output, the light intensity of the laser beam is directly controlled during a change by investigating a necessary driving amplitude, and
• the resultant regenerative signal of the optical information recording medium is smoothly variable in a recording range where a recording light intensity changes so that the optical information recording medium can be safely reproduced.