Invention Application
WO2015132752A3 DIFFRACTIVE OPTICAL ELEMENT OF THE HOLOGRAPHIC TYPE FOR DECODING INFORMATION WITH A HIGH SECURITY LEVEL
审中-公开
用于以高安全级别解码信息的全息图类型的差分光学元件
- Patent Title: DIFFRACTIVE OPTICAL ELEMENT OF THE HOLOGRAPHIC TYPE FOR DECODING INFORMATION WITH A HIGH SECURITY LEVEL
- Patent Title (中): 用于以高安全级别解码信息的全息图类型的差分光学元件
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Application No.: PCT/IB2015051616Application Date: 2015-03-05
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Publication No.: WO2015132752A3Publication Date: 2015-12-10
- Inventor: ROMANATO FILIPPO , RUFFATO GIANLUCA , MASSARI MICHELE
- Applicant: VENETO NANOTECH S C P A
- Assignee: VENETO NANOTECH S C P A
- Current Assignee: VENETO NANOTECH S C P A
- Priority: ITTO20140178 2014-03-05
- Main IPC: G03H1/22
- IPC: G03H1/22 ; G02B5/18 ; G02B27/42 ; G03H1/00 ; G03H1/08
Abstract:
Diffractive optical element (6) of the holographic type, which diffractively generates, when illuminated by a predetermined first electromagnetic field (DOB) having non-zero orbital angular momentum, a second electromagnetic field (IOB) forming a first image substantially lacking noise, indicative of information encoded by the diffractive optical element (6). In addition, the diffractive optical element (6) diffractively generates, when illuminated by a third electromagnetic field, a fourth electromagnetic field forming a noisy image. The first and the third electromagnetic field having different topological charges and/or different spatial distributions of phase singularities.
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