发明名称 |
Optical diffraction element |
摘要 |
An optical diffraction element ( 1 ) comprises a diffraction layer ( 4 ) which is divided into diffraction strips ( 6 ) alternating with intermediate strips ( 8 ). The diffraction strips comprise nano-elements ( 10 ) which are aligned in one direction and absorb radiation (b) which is linearly polarized in this direction. The diffraction element may be a linear or two-dimensional grating ( 1 ) or a Fresnel lens ( 160 ). The polarization-sensitive grating can be used in optical systems in which only radiation with a specific polarization direction should be diffracted, or in an optical record carrier to allow reading of an information structure with high spatial frequencies.
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申请公布号 |
US7221515(B2) |
申请公布日期 |
2007.05.22 |
申请号 |
US20050561861 |
申请日期 |
2005.12.21 |
申请人 |
KONINKLIJKE PHILIPS ELECTRONICS N.V. |
发明人 |
KURT RALPH;'T HOOFT GERT WIM;LIEDENBAUM COEN THEODORUS HUBERTUS FRANSISCUS;HENDRIKS ROBERT FRANS MARIA |
分类号 |
G02B27/12;G02B5/18;G02B5/30;G11B7/135;G11B7/24 |
主分类号 |
G02B27/12 |
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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