Optical recording medium, method of producing the same, and, optical recording method and optical reproducing method
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United States of America Patent
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Feb 22, 2011
Grant Date -
Mar 8, 2007
app pub date -
Aug 31, 2006
filing date -
Sep 6, 2005
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Expired
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Abstract
The present invention is intended to provide optical recording media of hologram type capable of high-density recording and capable of preventing noise even when the informing light and the reference light leak from filter layers formed of wavelength-selective reflection films. Accordingly, the present invention relates to optical recording media has a first substrate, a recording layer, a filter layer, an optical absorption layer and a second substrate in this order, wherein the recording layer records information by use of holography; methods of producing the same, as well as optical recording methods for the recording media and optical reproducing methods. Preferably, the optical absorption layer absorbs a light having a wavelength within 350 nm to 600 nm and transmits a light having a wavelength within 600 nm to 900 nm.
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