Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium
Reexamination Certificate
2011-03-22
2011-03-22
Huber, Paul (Department: 2627)
Dynamic information storage or retrieval
Specific detail of information handling portion of system
Radiation beam modification of or by storage medium
C369S044290
Reexamination Certificate
active
07911918
ABSTRACT:
The present invention aims to provide an optical recording method etc. that provides higher efficiency of recording and reproducing and is uninfluenced by the mismatch of optical axes of plural laser lights induced from accident errors of optical recording and optical reproducing apparatuses when carrying out recording or reproducing, or focus control etc. by use of a laser light, high multiple-recording can be carried out, and layer construction of the recording medium itself is simple.For the purpose, an optical recording method etc. is provided that comprises a first step of recording an interference image, in which a recording light is irradiated at an optional focusing length X1 in thickness direction of the recording layer, an interference image is formed, and the interference image is formed on the recording layer, then multiple bits are recorded per one recording, and a second step of recording an interference image, in which the recording light is irradiated at a focusing length X2 that is different from the focusing length X1 to form a second interference image, and the second interference image is formed and recorded on the recording layer, and then multiple bits are recorded per one recording.
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Hideyoshi Horimai et al Collinear Holography, Applied Optics, OSA, Optical Society of America, Washington, DC, vol. 44, No. 13, May 1, 2005 pp. 2575-2579, XP007901854.
FUJIFILM Corporation
Huber Paul
Sughrue & Mion, PLLC
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