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System and method for recording and replaying information

一种信息记录、记录区的技术，应用在光学记录/再现/擦除方法、磁性记录、数据记录等方向，能够解决记录密度增大等问题

Inactive Publication Date: 2007-04-18
HITACHI CONSUMER ELECTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the increase in recording density is also limited

Method used

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  • System and method for recording and replaying information
  • System and method for recording and replaying information
  • System and method for recording and replaying information

Examples

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Embodiment Construction

[0033] The present invention discloses a method and apparatus for recording information by irradiating light to a medium to form a recording area, and a method and apparatus for reproducing the recorded information. In order to ensure a thorough understanding of the present invention, numerous specific details are set forth. However, it will be understood by those skilled in the art that the present invention may be practiced without some or all of these specific details.

[0034] Figure 1 shows a three-dimensional diagram of the irradiation process and an illustration of beam intensity versus beam position, according to an embodiment of the present invention. Information is recorded by forming a recording area 6 along a data recording direction (track direction) on a recording surface 7 of the recording medium. A plurality of recording areas 6 exist in a cross-track direction (a direction perpendicular to the tracks), ie, a plurality of recording tracks are formed. The reco...

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Abstract

A method and apparatus for recording information by irradiating light onto a medium to form a recorded domain, and method and apparatus for reproducing the recorded information are provided. In one example of the method, a plurality of light spots are modulated synchronously and irradiated onto a recording medium so that the plurality of light spots have an overlapped region on the recording medium. Since the profile of the total energy of the plurality of light spots is varied when the intensities of the plurality of light spots are modulated synchronously, it is possible to move the position where the total energy becomes maximum to any position on the optical recording medium. Thus, by moving the maximum point of the total energy of light spots in a cross-track direction, information can be recorded in a wobbled manner.

Description

technical field [0001] The present invention generally relates to an information recording method, and more particularly, to an information recording method and an information recording apparatus using an information recording medium capable of recording information by exposure to energy beams. Background technique [0002] Recording marks or domains are generally formed by irradiating a single laser beam to a recording medium and changing the intensity of the laser beam, or by changing a magnetic field applied to the recording domain while maintaining the intensity of the laser beam at a certain level. [0003] Multilevel recording for increased density is known. As described in Technical Digest of International Symposium on Optical Memory 2001, 2001, p. 238, Arioka et al., the First Dye media for Multilevel Recording System and Advanced Gray Scale Recording on Phase Change Optical Disks, p. 240, the reproduction signal Multi-level recording is realized by mainly changing ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11B7/00G11B7/0045G11B7/005G11B7/007G11B7/013G11B7/125G11B7/127G11B7/135G11B7/1353G11B7/1356G11B7/1365G11B11/105
CPCG11B11/10532G11B7/1356G11B11/10595G11B7/24088G11B7/1353G11B7/1365G11B7/24085G11B7/00456G11B7/005G11B7/24082G11B11/10504G11B7/127
Inventor 神藤英彦宮本治一
Owner HITACHI CONSUMER ELECTRONICS CORP
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