| US 7,601,465 B2 | ||
| Holographic recording medium | ||
| Rumiko Hayase, Yokohama (Japan); Akiko Hirao, Chiba (Japan); Kazuki Matsumoto, Kawasaki (Japan); and Norikatsu Sasao, Tokyo (Japan) | ||
| Assigned to Kabushiki Kaisha Toshiba, Tokyo (Japan) | ||
| Filed on Mar. 28, 2006, as Appl. No. 11/390,481. | ||
| Claims priority of application No. 2005-229741 (JP), filed on Aug. 08, 2005. | ||
| Prior Publication US 2007/0030541 A1, Feb. 08, 2007 | ||
| Int. Cl. G03H 1/04 (2006.01) | ||
| U.S. Cl. 430—1 [430/2; 430/281.1; 359/3; 522/12; 522/27; 522/28; 522/29] | 17 Claims |
| 1. A holographic recording medium, comprising a recording layer comprising:
a radical-polymerizable compound;
a first photo-radical polymerization initiator (A) containing a titanocene compound; and
a second photo-radical polymerization initiator (B) containing at least one compound selected from the group consisting of
an amino acetophenone derivative, an acylphosphine oxide derivative, a benzyl derivative, and a thioxanthone derivative, wherein
the recording layer contains a three-dimensional cross-linked polymer matrix formed of a cured resin of 1,6-hexanediol diglycidyl
ether with either an amine or an organic acid anhydride as a curing agent.
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