Invention Grant

  • Patent Title: Optical information recording method, optical information reproducing method, optical information recording apparatus, and optical information recording and reproducing apparatus
  • Patent Title (中): 光信息记录方法,光信息再现方法,光信息记录装置和光信息记录和再现装置
  • Application No.: US13156625
    Application Date: 2011-06-09
  • Publication No.: US08305870B2
    Publication Date: 2012-11-06
  • Inventor: Tetsuhiro SakamotoHisayuki Yamatsu
  • Applicant: Tetsuhiro SakamotoHisayuki Yamatsu
  • Applicant Address: JP Tokyo
  • Assignee: Sony Corporation
  • Current Assignee: Sony Corporation
  • Current Assignee Address: JP Tokyo
  • Agency: K&L Gates LLP
  • Priority: JPP2010-139372 20100618
  • Main IPC: G11B7/00
  • IPC: G11B7/00
Optical information recording method, optical information reproducing method, optical information recording apparatus, and optical information recording and reproducing apparatus
Abstract:
An optical information recording method includes emitting light having a wavelength λ1 from a first light source with a pulse width of time tw1 or more and power P1, emitting light having a wavelength λ2 from a second light source with a pulse width of time tw2, a repetition interval T, and power P2, and performing information recording by simultaneously irradiating an identical part of a recording medium with the light from the first light source and the light from the second light source, in which the wavelength λ1 and the wavelength λ2 satisfy λ1>500 nm>λ2 and λ0 which is expressed as 1/λ1+1/λ2=1/λ0 satisfies a relationship of λ0 P1.
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