Hologram recording/reproducing device, and recording method, reproduction method and hologram recording medium thereof
A technology of holographic recording medium and reproducing equipment, which is applied in the field of holographic recording/reproducing equipment, can solve the problems that the recording density cannot be increased, hinder the recording capacity of the medium, and achieve the effect of increasing the recording capacity
Inactive Publication Date: 2010-06-23
FUJITSU LTD
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Problems solved by technology
[0026] As described above, in the conventional holographic recording recording medium, although the recording density of the user data itself can be increased to achieve a large capacity, there is still a problem that the address area for recording the address information for specifying the recording position of the user data is limited. The recording density cannot be increased, so the area occupied by the address area is much larger than the area occupied by the data area, as shown in Figure 10, which hinders the improvement of the recording capacity of the medium as a whole
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[0052] The present invention will be specifically described below based on the embodiments shown in the drawings, but the present invention is not limited to these embodiments.
[0053] Figures 1A to 1C According to an embodiment of the present invention, the configuration of a hologram recording medium is shown.
[0054] Figure 1A is a cross-sectional view of the medium. The holographic recording medium of the present invention has a layered structure having at least an address layer 11 and a recording layer 12 on a bottom layer 10 . For recording or reproduction, the surface of the recording layer 12 is irradiated with recording or reproducing laser light. The boundary between the bottom layer 10 and the address layer 11 functions as a reflective surface for reflecting laser light. The emitted laser light is reflected by the reflective surface to be emitted upward from the recording layer 12, and the emitted light is detected to reproduce address information and user da...
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Abstract
The present invention provides a hologram recording / reproducing device for recording and reproducing information to / from a hologram recording medium adapted to multiplexing and recording of a plurality of page data. The medium includes an address region and a recording region, the medium including a plurality of physical addresses each composed of a first physical address and a second physical address. The recording / reproducing device includes: a recording part; and a reproducing part, the recording part specifying the plurality of physical addresses to write user data into a specific physical address, the recording part writing the second physical address together with the user data in a specific recording unit region specified by the second physical address, the reproducing part readingpage data recorded in a designated physical address.
Description
technical field [0001] The present invention relates to a hologram recording / reproducing device. In particular, the present invention relates to a hologram recording / reproducing apparatus in which a structure for recording address information showing a recording position on a hologram recording medium is designed in order to realize high density, The present invention also relates to a recording method, a reproducing method, and a holographic recording medium of the holographic recording / reproducing device. Background technique [0002] Magneto-optical recording media and optical discs have conventionally been used as portable media capable of recording large amounts of information. Typical examples of portable media include MO, MD, CD-ROM, CD-R, CD-RW, DVD-R, DVD-RAM, and DVD-RW. Also, "holographic recording and reproduction technology" has recently attracted attention as a technology for realizing a recording medium with a higher capacity. This is a technique for multip...
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IPC IPC(8): G11B20/10G11B7/0065G11B7/00G11B20/12
CPCG11B7/00781G11B7/0065
Inventor 内田昭嘉
Owner FUJITSU LTD