As a supplement to the background information on this patent, VerticalNews correspondents also obtained the inventors' summary information for this patent: "The mark recording methods proposed in 'Three-dimensional optical disk data storage via the localized alteration of a format hologram' and 'Fabrication of multilayered photochromic memory media using pressure-sensitive adhesives' are useful in that optical paths for both sides of a disc are not disposed on a recording-reproducing pickup.
"However, this method does not ensure the acquisition of better reproducing signals.
"It is desirable to obtain a preferable reproducing signal with a sufficiently high modulation depth in the method that records marks by deleting or changing interference fringes formed in recording medium.
"According to an embodiment of the present application, there is provided a recording medium including a photosensitive layer, a nonphotosensitive layer, and a recording layer formation region in which the photosensitive layer and the nonphotosensitive layer are laminated. The photosensitive layer includes a recording layer in which interference fringes formed in parallel with a recording medium surface are deleted or changed within a portion irradiated with focused light to record information or light reflected during irradiation with focused light is used to reproduce information.
"The thickness d of the recording layer is equal to or greater than 8P.sub.F and equal to or less than 30P.sub.F where P.sub.F indicates the pitches of the above interference fringes. More preferably, the thickness d is equal to or greater than 8P.sub.F and equal to or less than 22P.sub.F.
"According to an embodiment of the present application, there is provided a reproducing apparatus including an optical pickup that irradiates the recording layer of the recording medium with light and receives reflected light and a signal processor that reproduces information recorded in the recording layer based on information of the reflected light received by the optical pickup.
"In the recording medium according to the embodiment of the present application, the photosensitive layers and nonphotosensitive layers are alternately laminated to form interference fringes in which, for example, one photosensitive layer is used as one recording layer. This enables the creation of a multi-layer recording medium including many recording layers. Alternatively, one photosensitive layer may include a plurality of recording layers (interference fringe formation part).
"This structure facilitates the creation of a recording medium including a plurality of recording layers in which interference fringes are formed. In addition, when the thickness of the recording layers falls within the above range, a preferable reproducing signal can be obtained from the recording layers.
"According to an embodiment of the present application, in the method of recording marks by deleting or changing interference fringes, it is possible to obtain a reproducing signal that has an appropriate signal level and modulation depth during reproduction.
"Additional features and advantages are described herein, and will be apparent from the following Detailed Description and the figures."
For additional information on this patent, see:
Keywords for this news article include: Sony Corportation, Information Technology, Information and
Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2013, NewsRx LLC
Most Popular Stories
- 'Beyonce' Tops the U.S. Album Chart
- Archer Daniels Midland Moving HQ to Chicago
- Singer Ian Watkins Sentenced to 35 Years Prison for Child Sex Abuse
- Universal CityWalk Rings in 2014 with Southern California's Biggest New Year's Eve Party, Featuring Dazzling Fireworks Displays, Three Live Concert Stages, DJ Performances and a Midnight Cascade of 1,000 Pounds of Confetti
- The Illuminati Don't Exist, Just Ask Them
- Contest Gives Startups a Jump in Jersey
- SAC Capital Employee Guilty of Insider Trading
- Adam Levine Wins Big as 'The Voice' Crowns Champ
- Senate Sends Bipartisan Budget Plan to President
- Fed Signals Strong Confidence in U.S. Economy