Patent ID: 7301868

Claim:
An optical disk recording/reproducing method performing recording and reproduction of information onto an optical disk by collecting a laser beam and irradiating the same on a surface of the optical disk, wherein the method includes the steps of: detecting difference in intensity of reflected light of the laser beam in a far field from different positions spaced in a tangential direction of a recording track of the optical disk; adjusting recording conditions so that a level of the difference in the light intensity detected after preset time passes from a time of start of irradiation of the laser beam comes close to an optimum level obtained when being recorded in an optimum recording conditions; and performing the recording of the information onto the optical disk based on the adjusted recording conditions, wherein the step of adjusting the recording conditions further includes the steps of: comparing a magnitude relation of the level between a state monitoring signal indicating the level of the difference in the light intensity and a reference level signal indicating the optimum level; performing an output adjustment of the laser beam by putting a record surplus signal into a non-active state and simultaneously putting a record shortage state into an active state, and then increasing an output of the laser beam, when a level of a state monitoring signal is lower than a reference level signal, and by putting the record surplus signal into the active state and simultaneously putting the record shortage signal into the non-active state and then reducing the output of the laser beam, when the level of the state monitoring signal is higher than the level of the reference level signal; and repeating the comparing step and the output adjusting step until the difference between the level of the state monitoring signal and the level of the reference level signal comes to within a range of an allowable error previously determined and until both the record surplus signal and the record shortage signal are put into the non-active state.