초록 ▼

An error checking method and apparatus for recording digital data in an optical recording medium. Digital data are written onto the medium by a modulated laser whose beam is detected by a first photodetector means which measures laser output directed toward the recording medium. A second photodetect

An error checking method and apparatus for recording digital data in an optical recording medium. Digital data are written onto the medium by a modulated laser whose beam is detected by a first photodetector means which measures laser output directed toward the recording medium. A second photodetector means measures light scattering from the medium, while a third photodetector detects and measures light transmitted through the recording layer of the medium serving to confirm recording of the data. Amounts of transmitted light or scattered light from the medium are correlated to the laser output and to expected values of light for detecting errors in recording immediately after the time of recording. Reversal processing of the recording medium eliminates a large fraction of potential errors.

대표청구항 ▼

A method of recording and error checking optical pulses on an optical recording medium comprising, directing optical pulses from a light source at an optical recording medium which is light transmissive prior to recording data, detecting optical energy directed toward said recording medium and detec

A method of recording and error checking optical pulses on an optical recording medium comprising, directing optical pulses from a light source at an optical recording medium which is light transmissive prior to recording data, detecting optical energy directed toward said recording medium and detecting optical energy transmitted through said recording medium, generating corresponding first and second electrical signals indicative of the energy received from said pulses, and correlating said first and second electrical signals for signalling data errors in writing on said recording medium.