G - Physics – 11 – B
Patent
G - Physics
11
B
352/32.1, 352/32
G11B 7/24 (2006.01) G11B 7/0045 (2006.01) G11B 7/005 (2006.01) G11B 7/0055 (2006.01) G11B 7/244 (2006.01) G11B 7/25 (2006.01)
Patent
CA 2014698
2014698 ABSTRACT OF THE DISCLOSURE A memory medium includes a memory layer of a polymer liquid crystal and a reflection layer disposed on a substrate. A record part having a different refractive index from that of a non-record part is formed in the memory layer so that the record part and the non-record part have a difference in optical thickness of the memory layer. In a reproduction step, the memory medium is irradiated with a reproduction beam of coherent light so that the reproduction beam is transmitted through the memory layer, reflected at the reflection layer and re-transmitted through the memory layer, during which the reproduction beam is subjected to interferential diffraction due to the optical thickness difference between the record part and the non-record part to allow readout of the recorded data. MCOO1/1165
Ohnishi Toshikazu
Oikawa Katsuya
Yoshinaga Kazuo
Canon Kabushiki Kaisha
Ridout & Maybee Llp
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