Method and apparatus for recording and reproducing data on and from optical disk

Abstract

Disclosed is a method and apparatus for recording and reproducing data on and from an optical disk. Data is recorded on an optical disk exhibiting a difference in an optical absorption rate between wavelengths by a light beam having a wavelength of a first standard. The data recorded on the optical disk is reproduced by a light beam having a wavelength of a second standard.

Description

technical field [0001] The present invention relates to a method and apparatus for recording data to and reproducing data from an optical information recording medium, and more particularly to a method for recording and reproducing data by irradiating a light beam to an optical disc having wavelength characteristics and equipment. Background technique [0002] Optical discs, one of optical information recording media, are widely used for recording and reproducing various information as well as audio and video. Optical discs are classified into read-only type discs, recordable or write-once type discs, rewritable or rewritable multiple type discs, etc., according to the number of information records. Read-only disks can only read data but not write data. For example, there are commercially available compact discs digital audio (CD-DA), compact discs read only memory (CD-ROM), digital video discs (DVD)-video. As recordable or write-once type disks that can only write data o...

AI Technical Summary

Problems solved by technology

However, if the recording optical power is increased by increasing the rotation speed in order to shorten the recording time, problems such as heat generation and cost increase are brought about

That is to say, in CD-R drives using a single wavelength of 780nm, there is a limit to the improvement of the recording speed

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