Optical information storage medium reproduction apparatus and control method of the same

Optical information storage medium reproduction apparatus and control method of the same

  • CN 101,840,707 B
  • Filed: 09/25/2008
  • Issued: 07/08/2015
  • Est. Priority Date: 10/19/2007
  • Status: Active Grant
First Claim
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1. an optical information recording medium reproducing device, is characterized in that:

  • For resetting to the optical information recording medium being laminated with multiple information recording layer,Described information recording layer includes the recording mark being shorter in length than optical system resolving limit,Be longer than the recording mark of optical system resolving limit by length in described optical information recording medium at least one layer in described information recording layer and record the information relevant to the setting of the playback laser power of each layer,Described optical information recording medium reproducing device comprises;

    Optical pickup apparatus, it is to being longer than the recording mark of described optical system resolving limit by length and the information relevant to the setting of the playback laser power of each layer recorded is reset in described information recording layer;

    WithControl part, its information relevant in the setting based on the playback laser power to described each layer read the recording mark that includes and be shorter in length than optical system resolving limit and information recording layer closest to playback laser entrance face, be less than read from required power during plane of incidence information recording layer farthest and be more than or equal to the power of the minimum power meeting replay signal characteristic required when reading this information recording layer by the playback laser power settings of the information recording layer closest to playback laser entrance face.

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