Optical information recording method and apparatus

An apparatus for optically recording information on a recording medium by irradiating the recording medium with an irradiation light of a recording power to form a recorded-mark on the recording medium such that a reflection coefficient from an area of the recorded-mark is different than a reflection coefficient from an area of the recorded-medium where the recorded-mark is not formed, the apparatus comprising:

• a laser diode configured to irradiate the recording medium with light to form the recording mark by changing the power of the irradiation light between a recording power and a non-recording power;
• a light receiving device configured to receive a reflection light of the irradiation light reflected by the recording medium and to produce a corresponding light signal;
• a mark-state determining device configured to determine a state of the recording-mark based upon the light signal produced during a predetermined period of time immediately after power of the irradiation light changes to the non-recording power;
• and
• a laser diode control device configured to control the laser diode so as to modulate the recording power of the irradiation light according to the state of the recorded-mark.

An apparatus for optically recording information on a recording medium, comprising:

• means for irradiating the recording medium with an irradiation light of a recording power to form a recorded-mark on the recording medium such that a reflection coefficient from an area of the recorded-mark is different than a reflection coefficient from an area of the recording medium where the recorded-mark is not formed;
• means for modulating the irradiation light according to the information for recording to form the recorded-mark on the recording medium by changing the power of the irradiation light between the recording power and a non-recording power;
• means for receiving a reflection light of the irradiation light reflected by the recording medium and to produce a corresponding light signal;
• means for determining a state of the recorded-mark based upon the light signal which is produced during a predetermined period of time immediately after power of the irradiation light changes to the non-recording power;
• and,
• means for controlling the recording power of the irradiation light according to the state of the recorded-mark.