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US 7,031,037 B2Granted
Holographic recording medium and holographic recording medium manufacturing method
AssigneeKabushiki Kaisha Toshiba
InventorsAkiko Hirao, Kazuki Matsumoto, Katsutaro Ichihara
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Abstract
A holographic recording medium includes a transparent layer having a servo surface and a light incidence surface which face each other; a reflecting layer formed on the servo surface-side transparent layer; and a holographic recording layer formed on the light illuminating-side transparent layer. The transparent layer includes resin films laminated so that adjacent resin films differ in stretching direction by 90 degrees.
Claims11
A holographic recording medium comprising:
- a first transparent layer including a servo surface and a light incidence surface facing each other;
- a reflecting layer located on a servo surface-side of the first transparent layer;
- and
- a holographic recording layer located on a light incidence-side of the first transparent layer, wherein
- the first transparent layer includes resin films laminated, adjacent resin films differing in stretching direction by 90 degrees.
2 more elements
A method of manufacturing a holographic recording medium, comprising:
- stretching resin films;
- laminating the stretched resin films so that adjacent resin films differ in stretching direction by 90 degrees, to obtain a transparent sheet;
- forming tracking grooves on one surface of the transparent sheet;
- forming a reflecting layer on the one surface of the transparent sheet;
- and
- forming a holographic recording layer on another surface of the transparent sheet.
3 more elements
Dependencies are inferred from the claim text.