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

A technology for recording data and optical discs, applied in optical recording/reproduction/erasing methods, recording/reproduction with optical methods, optical recording heads, etc., can solve problems such as heat and cost increases, and limitations in recording speed improvements

Inactive Publication Date: 2003-12-10
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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

Examples

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Embodiment Construction

[0020] In the following description, numerous specific details are set forth, such as various optical discs, lengths, etc., for a more thorough understanding of the present invention. It will be apparent, however, that the present invention may be practiced by one skilled in the art without these specific details. In other examples, well-known functions and constructions are described, which do not obscure the understanding of the present invention.

[0021] Generally, if, for example, laser light with a red wavelength of 650nm (the reference wavelength of the DVD standard) is irradiated to a CD-R, the reflectance decreases to 10% or less, such as figure 1 shown. Therefore, the absorption rate is higher and the amount of light returning from the disc is reduced. If the amount of reflected light decreases, the signal level drops, causing problems in reproducing data from the CD-R. That is, in a DVD system using light of a red wavelength, the reflectance is extremely low, mak...

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PUM

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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...

Claims

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Application Information

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IPC IPC(8): G11B7/00G11B7/004G11B7/0045G11B7/005G11B7/09G11B7/125G11B7/127G11B7/135G11B7/24
CPCG11B7/00455G11B7/24G11B7/127G11B7/0052G11B7/09
Inventor 朴仁植
Owner SAMSUNG ELECTRONICS CO LTD
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