Patent ID: 7035180

Claim:
An optical information recording reproducing apparatus, comprising: a first trial write recording unit that irradiates a trial write area of a recording medium with mark recording power laser beam and records trial write information; a trial write reproducing unit that irradiates said trial write area with reproducing power laser beam and reproduces the trial write information; a laser power discrimination unit that discriminates power of laser beam most suitable for data recording based on trial write reproduction information obtained from said trial reproduction unit; a defective area detection unit that detects a defective area included in said trial write area from information on return light coming from the recording medium using the mark recording power laser beam that is recording the trial write information; a second trial write recording unit that re-records the trial write information in another area that is within said trial write area and differs from said defective area detected by said defective area detection unit; and a laser beam emission time discrimination unit that discriminates laser beam emission time most suitable for the data recording, wherein said trial write reproducing unit comprises: a first trial write reproducing unit that irradiates said trial write area with the reproducing power laser beam and reproduces the trial write information; and a second trial write reproducing unit that irradiates said another area with the reproducing power laser beam and reproduces the trial write information, wherein said laser power discrimination unit discriminates the power of the laser beam power most suitable for the data recording based on the trial write reproduction information obtained from said first trial write reproducing unit and the trial write reproduction information obtained from said second trial write reproducing unit, and said laser beam emission time discrimination unit discriminates the laser beam power most suitable for the data recording.