Optical recording medium

The invention provides an optical recording medium comprising at least two recording layers containing a dye. At least two layers of the recording layers have different optical constants, and at least one among these recording layers having different optical constants contains a dye which forms a th...

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Bibliographic Details
Main Authors SUZUKI; TAKAHIKO, MONDEN; ATSUSHI, NAMBA; KENRYO, SHINKAI; MASAHIRO, KITAGAWA; SUMIKO, YOSHIMURA; EMIKO
Format Patent
LanguageEnglish
Published 07.07.1998
Edition6
Subjects
INFORMATION STORAGE
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER
PHYSICS
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Summary:The invention provides an optical recording medium comprising at least two recording layers containing a dye. At least two layers of the recording layers have different optical constants, and at least one among these recording layers having different optical constants contains a dye which forms a thin film having an absorption spectrum whose half-value width is up to 170 nm. This construction permits the medium to be written and read in a conventional wavelength range of about 780 nm and a shorter wavelength range of about 630-680 nm.
Bibliography:Application Number: US19960686658