Invention Grant
- Patent Title: Forgery prevention medium with a volume hologram layer and information layer in different colors
- Patent Title (中): 具有体积全息图层和不同颜色的信息层的防伪介质
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Application No.: US12768277Application Date: 2010-04-27
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Publication No.: US08456722B2Publication Date: 2013-06-04
- Inventor: Tsuyoshi Yamauchi , Mitsuru Kitamura , Makio Kurashige , Tomoki Yasuda
- Applicant: Tsuyoshi Yamauchi , Mitsuru Kitamura , Makio Kurashige , Tomoki Yasuda
- Applicant Address: JP Tokyo
- Assignee: Dai Nippon Printing Co., Ltd.
- Current Assignee: Dai Nippon Printing Co., Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Sughrue Mion, PLLC
- Priority: JP2009-107620 20090427
- Main IPC: G03H1/00
- IPC: G03H1/00
Abstract:
A forgery prevention medium includes a volume hologram layer on which an interference pattern is recorded after being exposed to an emitted laser beam; a digital watermarking information layer that can be interpreted by emitting a light beam with a predetermined wavelength; and an adherend that has the digital watermarking information layer and is attached to the volume hologram layer, wherein the information layer is of a different color from the volume hologram layer.
Public/Granted literature
- US20100271674A1 FORGERY PREVENTION MEDIUM Public/Granted day:2010-10-28
Information query
