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    • 2. 发明授权
    • Method and apparatus for inspection of security articles incorporating a diffractive optical projection element
    • 用于检查包含衍射光学投影元件的安全物品的方法和装置
    • US07652757B2
    • 2010-01-26
    • US10585506
    • 2005-01-10
    • Gary Fairless PowerPatrick SwiftJames Hock Hai ChuaAnthony NardellaPaul Henson
    • Gary Fairless PowerPatrick SwiftJames Hock Hai ChuaAnthony NardellaPaul Henson
    • G06K9/74
    • G07D7/0032
    • A method and apparatus for inspection of a security article (10) is provided in which a substantially collimated light beam (15) from a point light source (14) is directed onto a diffractive optical projection element (DOE) (11). The light beam is transformed by the DOE (11) into a patterned beam (17) which is reconstructed to form a projected image at a particular position in space remote from the surface of the security article 910). An optical detection device 916) is located at which the patterned beam (17) is reconstructed to detect the projected image. The inspection method and apparatus may be used in equipment for handling, sorting, counting or otherwise processing security articles, in particular security documents such as banknotes. The apparatus may include a processor for generating a signal when the absence or poor quality of a DOE is detected and which is used to isolate or mark the security article.
    • 提供了一种用于检查安全物品(10)的方法和装置,其中来自点光源(14)的基本上准直的光束(15)被引导到衍射光学投影元件(DOE)(11)上。 光束被DOE(11)转换成图案化的光束(17),其被重构以在远离安全物体910的表面的空间中的特定位置处形成投影图像。 光学检测装置916)位于其上重建图案化束(17)以检测投影图像。 检查方法和装置可以用于处理,分类,计数或以其他方式处理安全物品的设备,特别是诸如纸币的安全文件。 该装置可以包括处理器,用于当检测到DOE的不存在或不良品质并且用于隔离或标记安全物品时产生信号。
    • 10. 发明申请
    • Method and Apparatus for Inspection of Security Articles
    • 检查安全用品的方法和装置
    • US20080046199A1
    • 2008-02-21
    • US10585506
    • 2005-01-10
    • Gary Fairless PowerPatrick SwiftJames Hock Hai ChuaAnthony NardellaPaul Henson
    • Gary Fairless PowerPatrick SwiftJames Hock Hai ChuaAnthony NardellaPaul Henson
    • G07D7/12
    • G07D7/0032
    • A method and apparatus for inspection of a security article (10) is provided in which a substantially collimated light beam (15) from a point light source (14) is directed onto a diffractive optical projection element (DOE) (11). The light beam is transformed by the DOE (11) into a patterned beam (17) which is reconstructed to form a projected image at a particular position in space remote from the surface of the security article 910). An optical detection device 916) is located at which the patterned beam (17) is reconstructed to detect the projected image. The inspection method and apparatus may be used in equipment for handling, sorting, counting or otherwise processing security articles, in particular security documents such as banknotes. The apparatus may include a processor for generating a signal when the absence or poor quality of a DOE is detected and which is used to isolate or mark the security article.
    • 提供了一种用于检查安全物品(10)的方法和装置,其中来自点光源(14)的基本上准直的光束(15)被引导到衍射光学投影元件(DOE)(11)上。 光束被DOE(11)转换成图案化的光束(17),其被重构以在远离安全物体910的表面的空间中的特定位置处形成投影图像。 光学检测装置916)位于其上重建图案化束(17)以检测投影图像。 检查方法和装置可以用于处理,分类,计数或以其他方式处理安全物品的设备,特别是诸如纸币的安全文件。 该装置可以包括处理器,用于当检测到DOE的不存在或不良品质并且用于隔离或标记安全物品时产生信号。