Optical information recording/reproducing apparatus including means for varying intensity of a preheating light beam

An information recording and/or reproducing apparatus comprising:

• means for irradiating an information track of a magneto-optical recording medium with a preheating light beam;
• means for irradiating a light spot of the preheating light beam with a recording light beam;
• means for detecting the amplitude of a signal reproduced from the magneto-optical recording medium;
• and
• means for varying the light intensity of the preheating light beam in accordance with the detection result of said detecting means.

An optical information recording apparatus comprising:

• means for irradiating an information track of an optical information recording medium with a preheating light beam;
• means for irradiating the information track of the optical information recording medium with a recording light beam;
• detection means for detecting the environmental temperature of the apparatus;
• and
• means for varying the light intensity of the preheating light beam in accordance with the detection result of said detection means.

An optical information recording/reproducing apparatus comprising:

• means for irradiating an information track of a magnetooptical information recording medium with a preheating light beam;
• means for irradiating the information track of the magnetooptical information recording medium with a recording light beam;
• detection means for detecting the amplitude of a reproduction signal read out from the magnetooptical information recording medium;
• and
• means for varying the light intensity of the preheating light beam in accordance with the detection result of said detection means.

A method of recording information in an optical information recording apparatus, said method comprising the steps of:

• irradiating an information track of an optical information recording medium with a preheating light beam;
• irradiating a light spot of the preheating light beam with a recording light beam;
• and
• detecting the environmental temperature of the apparatus and varying the light intensity of the preheating light beam in accordance with the detection result.

A method of recording information in an optical information recording/reproducing apparatus, said method comprising the steps of:

• irradiating an information track of a magnetooptical information recording medium with a preheating light beam;
• irradiating a light spot of the preheating light beam with a recording light beam;
• and
• detecting the amplitude of a reproduction signal read out from the magnetooptical information recording medium and varying the light intensity of the preheating light beam in accordance with the detection result.

A method of recording information in an optical information recording apparatus, said method comprising the steps of:

• irradiating an information track of an optical information recording medium with a preheating light beam;
• irradiating the information track of the optical information recording medium with a recording light beam;
• and
• detecting the environmental temperature of the apparatus and varying the light intensity of the preheating light beam in accordance with the detection result.

A method of recording information in an optical information recording/reproducing apparatus, comprising the steps of:

• irradiating an information track of a magnetooptical recording medium with a preheating light beam;
• irradiating the information track of the magnetooptical recording medium with a recording light beam;
• and
• detecting the amplitude of a reproduction signal read out from the magnetooptical recording medium and varying the light intensity of the preheating light beam in accordance with the detection result.

An optical information recording/reproducing apparatus comprising:

• means for irradiating an information track of a magnetooptical recording medium with a preheating light
• means for irradiating a light spot of the preheating light beam with a recording light beam;
• and
• means for detecting a reproduction signal read out from the magnetooptical recording medium and for varying the light intensity of the preheating light beam in accordance with the detection result.

An optical information recording/reproducing apparatus comprising:

• means for irradiating an information track of a magnetooptical recording medium with a preheating light beam;
• means for irradiating the information track of the magnetooptical recording medium with a recording light beam;
• means for detecting a reproduction signal read out from the magnetooptical recording medium;
• and
• means for varying the light intensity of the preheating light beam in accordance with the detection result of said detection means.

A method of recording information in an optical information recording/reproducing apparatus, said method comprising the steps of:

• irradiating an information track of a magnetooptical recording medium with a preheating light beam;
• irradiating a light spot of the preheating light beam with a recording light beam;
• and
• detecting a reproduction signal read out from the magnetooptical recording medium and varying the light intensity of the preheating light beam in accordance with the detection result.

A method of recording information in an optical information recording/reproducing apparatus, comprising the steps of:

• irradiating an information track of a magnetooptical recording medium with a preheating light beam;
• irradiating the information track of the magnetooptical recording medium with a recording light beam;
• and
• detecting a reproduction signal read out from the magnetooptical recording medium and varying the light intensity of the preheating light beam in accordance with the detection result.

An optical information recording/reproducing apparatus comprising:

• means for irradiating an information track of a magnetooptical recording medium with a preheating light beam;
• means for irradiating a light spot of the preheating light beam with a recording light beam;
• detection means for optically detecting the temperature of the magnetooptical recording medium;
• and
• means for varying the light intensity of the preheating light beam in accordance with the detection result of said detection means.

An optical information recording/reproducing apparatus comprising:

• means for irradiating an information track of a magnetooptical recording medium with a preheating light beam;
• means for irradiating the information track of the magnetooptical recording medium with a recording light beam;
• detection means for optically detecting the temperature of the magnetooptical recording medium;
• and
• means for varying the light intensity of the preheating light beam in accordance with the detection result of said detection means.

A method of recording information in an optical information recording/reproducing apparatus, comprising the steps of:

• irradiating an information track of a magnetooptical recording medium with a preheating light beam;
• irradiating a light spot of the preheating light beam with a recording light beam;
• and
• optically detecting the temperature of the magnetooptical recording medium and varying the light intensity of the preheating light beam in accordance with the detection result.

A method of recording information in an optical information recording/reproducing apparatus, comprising the steps of:

• irradiating an information track of a magnetooptical recording medium with a preheating light beam;
• irradiating the information track of the magnetooptical recording medium with a recording light beam;
• and
• optically detecting the temperature of the magnetooptical recording medium and varying the light intensity of the preheating light beam in accordance with the detection result.