Information recording method and apparatus with suppressed mark edge jitters
View Patent ↗Recording information is disclosed in which an information recording medium is irradiated with a recording energy beam that is power-modulated into at least a record power level and a record-ready power level lower than the record power level. The information is recorded on the recording medium in the form of length and interval of a mark portion. When forming a mark portion of a predetermined length, the radiation energy of the energy beam is increased as compared with when forming a mark portion of a different length before or after the first pulse of an energy beam pulse train including at least a pulse for forming the mark portion.
1. An information recording apparatus to record information to an optical recording medium, comprising:
a light source;
a generator to generate light beam pulses with light from the light source;
wherein said light beam pulses have a second power level to make a first state, and a third power level higher than said second power level to make a second state,
a record mark portion is formed with a plurality of light beam pulses each reaching said third power level, said plurality of light beam pulses are followed by an interval at a power level lower than said second power level;
and said power level of said interval that is lower than said second power level is higher than levels of intervals between said plurality of light beam pulses.
2. An information recording apparatus according to claim 1 , wherein said power level of said interval lower than said second power level and higher than levels of intervals between said plurality of light beam pulses is changed according to a length of a space portion following said record mark portion.
3. An information recording apparatus according to claim 1 , wherein when said plurality of light beam pulses contains three or more pulses, a power level of an interval between first and second pulses is higher than a power level of an interval between the second and third pulses.