发明名称 |
Optical element, optical head, optical recording reproduction device and manufacturing method of optically active polymer film |
摘要 |
An optical head for recording or reproducing a signal with respect to an optical recording medium, which includes an optical element disposed between a light source and an optical recording medium. The optical element has an optically active polymer film in which an optical rotation property changes with respect to an applied voltage, a pair of conductive transparent thin films for applying a voltage to the optically active polymer film, and a transmittance polarization anisotropic part having a different transmittance with respect to a polarization direction, which is disposed on one of the conductive transparent thin films. By changing the applied voltage to the optically active polymer film, a light quantity of a linearly polarized light transmitted through the optical element can be changed substantially instantaneously. Therefore, the power of light reaching the optical recording medium can be switched substantially instantaneously at the time when switched between recording and reproduction.
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申请公布号 |
US2002141321(A1) |
申请公布日期 |
2002.10.03 |
申请号 |
US20020096674 |
申请日期 |
2002.03.12 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
WADA HIDENORI;NISHINO SEIJI;KADOWAKI SHIN-ICHI;YAMAMOTO HIROAKI;OGATA DAISUKE |
分类号 |
G02F1/061;G11B7/125;G11B7/135;(IPC1-7):G11B7/135 |
主分类号 |
G02F1/061 |
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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