发明名称 |
Holographic optical information recording/reproducing device |
摘要 |
An optical information recording/reproducing device reproduces digital data recorded in a form of interference fringes produced by two coherent beams in a hologram disk, by projecting a coherent beam to the hologram disk and receiving a reproduction signal beam obtained by diffraction by means of a two-dimensional photodetector array. The holographic optical information recording/reproducing device includes a tunable coherent light source that emits the coherent beam, and a control section controls and optimizes a wavelength of the tunable coherent light source according to position information of the reproduction signal beam on the two-dimensional photodetector array. Thus, a holographic optical information recording/reproducing device is provided that is capable of maintaining a sufficient reproduction signal intensity and reproducing signals stably while undergoing a minimum of cross-talk, even in the case where the optimal reproduction wavelength varies due to a variance of media, a change of a temperature of a recording medium, etc.
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申请公布号 |
US2002075776(A1) |
申请公布日期 |
2002.06.20 |
申请号 |
US20010993198 |
申请日期 |
2001.11.14 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
KASAZUMI KEN?APOS,ICHI;KITAOKA YASUO;YAMAMOTO KAZUHISA |
分类号 |
G03H1/22;G11B7/0065;G11B7/125;G11B7/13;G11B7/135;(IPC1-7):G11B7/125 |
主分类号 |
G03H1/22 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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