发明名称 |
OPTICAL DIFFRACTION DEVICE AND OPTICAL INFORMATION PROCESSING DEVICE |
摘要 |
<p>The present invention is an optical diffraction element to be disposed in an optical path through which a plurality of light beams of different wavelengths travel. It has a periodic structure which, when a first light beam having a wavelength » 1 among the plurality of light beams is in a linear polarization state polarized in a first direction X, allows the first light beam to be substantially completely transmitted therethrough, but when the first light beam is in a linear polarization state polarized in a second direction Y perpendicular to the first direction, causes the first light beam to be substantially completely diffracted. At least a portion of a second light beam having a wavelength » 2 among the plurality of light beams, the wavelength » 2 being different from the wavelength » 1 of the first light beam, is diffracted regardless of the polarization state thereof.</p> |
申请公布号 |
EP1622137(A1) |
申请公布日期 |
2006.02.01 |
申请号 |
EP20040728964 |
申请日期 |
2004.04.22 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
ASADA, JUN-ICHI;NISHIWAKI, SEIJI |
分类号 |
G02B5/18;G11B7/125;G11B7/135;(IPC1-7):G11B7/135;G02B5/30 |
主分类号 |
G02B5/18 |
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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