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Title:
OPTICAL RECORDING MEDIUM AND RECORDING REPRODUCING METHOD FOR THE SAME
Document Type and Number:
Japanese Patent JP2004103210
Kind Code:
A
Abstract:

To provide an optical recording medium and a recording/reproducing method for the same which record in the same space information different by each wavelength while using a recording/reproducing method approximately similar to that of the conventional optical recording medium, improve a recording density thereby, and enable simultaneous recording/reproducing of information from a plurality of pits by a plurality of laser beams to increase a transfer rate of data.

A substrata is provided with a recording layer which consists of a mixed body composed of organic material M1 which has a maximum absorption band in λ1 (380-450nm) and whose transformation temperature is T1 and organic material M2 which has the maximum absorption in λ2(620-680nm) and whose transformation temperature T2 (T2 < T1). M2 is transformed by λ2 and a recording mark of a certain length is formed, whereas an M1 temperature is raised by λ1, the substrate is transformed, and a recording mark of another length is formed. Each column center of the recording marks λ1 and λ2 is shifted for recording and reproduced by two wavelengths of λ1 and λ2.


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Inventors:
SASA NOBORU
Application Number:
JP2003000190896
Publication Date:
April 02, 2004
Filing Date:
July 03, 2003
Export Citation:
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Assignee:
RICOH KK
International Classes:
B41M5/26; G11B7/004; G11B7/24; G11B7/244; (IPC1-7): G11B7/24; B41M5/26; G11B7/004
Attorney, Agent or Firm:
舘野 千惠子