Title:
OPTICAL INFORMATION MEDIUM MEASURING METHOD, OPTICAL INFORMATION MEDIUM, RECORDING DEVICE AND REPRODUCING DEVICE
Document Type and Number:
WIPO Patent Application WO/2010/029774
Kind Code:
A1
Abstract:
Provided is an optical information medium measuring method for measuring the modulation degree of an optical information medium which has a multilayer structure having a plurality of information layers. The method includes: a first step of measuring the modulation degree of each layer of the optical information medium by a measuring optical system; a second step of obtaining the thickness between the layers of the optical information medium; a third step of obtaining the reflectance of each layer of the optical information medium; and a fourth step of converting the modulation degree of each layer measured in the first step into a modulation degree in a reference optical system different from the measuring optical system by using the thicknesses between the layers obtained in the second step and the reflectance of each layer obtained in the third step.
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Inventors:
SANO KOUSEI
KOMMA YOSHIAKI
HINO YASUMORI
KOMMA YOSHIAKI
HINO YASUMORI
Application Number:
PCT/JP2009/004561
Publication Date:
March 18, 2010
Filing Date:
September 14, 2009
Export Citation:
Assignee:
PANASONIC CORP (JP)
SANO KOUSEI
KOMMA YOSHIAKI
HINO YASUMORI
SANO KOUSEI
KOMMA YOSHIAKI
HINO YASUMORI
International Classes:
G11B7/26; G11B7/005; G11B7/24
Domestic Patent References:
| WO2007108507A1 | 2007-09-27 |
Foreign References:
| JP2007272992A | 2007-10-18 | |||
| JP2007305292A | 2007-11-22 | |||
| JP2006127636A | 2006-05-18 | |||
| JP2006040342A | 2006-02-09 | |||
| JP2008027481A | 2008-02-07 | |||
| JP2008287847A | 2008-11-27 | |||
| JP2007257759A | 2007-10-04 |
Other References:
See also references of EP 2325841A4
Attorney, Agent or Firm:
KOTANI, Etsuji et al. (JP)
Etsuji Kotani (JP)
Etsuji Kotani (JP)
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