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    Dynamic appearance-changing optical devices (DACOD) printed in a shaped magnetic field including printable fresnel structures
    4.
    发明授权
    Dynamic appearance-changing optical devices (DACOD) printed in a shaped magnetic field including printable fresnel structures 有权
    动态外观改变光学器件（DACOD）印刷在包括可印刷的菲涅耳结构的成形磁场中

    公开(公告)号：US08343615B2

    公开(公告)日：2013-01-01

    申请号：US11278600

    申请日：2006-04-04

    申请人： Vladimir P. Raksha ,  Paul G. Coombs ,  Charles T. Markantes ,  Alberto Argoitia ,  Roger W. Phillips

    发明人： Vladimir P. Raksha ,  Paul G. Coombs ,  Charles T. Markantes ,  Alberto Argoitia ,  Roger W. Phillips

    IPC分类号： B32B5/16

    CPC分类号： B42D25/369 ,  B05D3/207 ,  B41M3/148 ,  B42D25/29 ,  B42D2033/16 ,  B42D2035/20 ,  G02B5/09 ,  G02B26/026 ,  G02B27/0025 ,  G09F3/0376 ,  Y10T428/24802 ,  Y10T428/25

    摘要： A printed image is disclosed wherein the image may be in the form of an array of magnetically aligned platelets or flakes that may by uniform in shape and size and wherein the flakes are arranged in a particularly manner to form optically illusive images useful as security devices, or useful in beam steering applications. In one embodiment of this invention printed array is disclosed a plurality of concentric rings of magnetically aligned platelets disposed upon a substrate in the form of a Fresnel structure, preferably a Fresnel reflector. Advantageously, since the magnetic field can be controlled with respect to strength and direction, one can easily design a field that will correct for spherical aberration that would otherwise be present in a typical Fresnel reflector. In other embodiments of the invention optically illusive images of funnels, domes and cones are printed.

    摘要翻译： 公开了一种印刷图像，其中图像可以是可以通过形状和尺寸均匀的磁性对准的血小板或薄片的阵列的形式，并且其中薄片以特别的方式布置以形成用作安全装置的光学虚幻图像， 或用于波束转向应用。 在本发明的一个实施例中，印刷阵列公开了多个磁性对准的血小板的同心环，其设置在菲涅耳结构形式的基板上，优选为菲涅耳反射器。 有利地，由于可以相对于强度和方向控制磁场，所以可以容易地设计出将校正否则将存在于典型的菲涅尔反射器中的球面像差的场。 在本发明的其它实施例中，打印漏斗，圆顶和圆锥的光学虚幻图像。