Verify-while-recording device for optical disk recording apparatus

A verify-while-recording device for an optical recording apparatus, comprising:

• an optical head for recording recording data on an optical disk medium by using a recording beam;
• signal reproducing means for reproducing the recording data from the recording beam that is being recorded on the optical disk and outputting a reproduction signal;
• timing control means for outputting a control signal, a timing of which is controlled based on the recording data, and delayed recording data;
• first recording state determining means for detecting a state change in reproduction signal and obtained from a recording start time point of the recording data to a recording end time point thereof, on the basis of the reproduction signal sent from said signal reproducing means and the control signal and a delayed control signal sent from said timing control means;
• second recording state determining means for detecting a state change in reproduction signal obtained from a recording end time point of the recording data to a recording start time point thereof, on the basis of the reproduction signal sent from said signal reproducing means and the control signal and the delayed control signal sent from said timing control means;
• and
• recording condition determining means for outputting a defective recording signal in accordance with outputs from said first and second recording state determining means.