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    • 8. 发明授权
    • Fan-shaped X-ray beam imaging systems employing graded multilayer optic devices
    • 采用渐变多层光学器件的扇形X射线束成像系统
    • US08311184B2
    • 2012-11-13
    • US12871484
    • 2010-08-30
    • Susanne Madeline LeePeter Michael EdicForrest Frank Hopkins
    • Susanne Madeline LeePeter Michael EdicForrest Frank Hopkins
    • G21K1/06
    • G21K1/062A61B6/032A61B6/4021A61B6/4078A61B6/482B82Y10/00G21K2201/064
    • An X-ray imaging system that produces one or more fan-shaped beams is described. The system includes a target for emitting X rays that includes at least one target focal spot, and one or more graded multilayer optic devices in optical communication with the target. The optics transmits at least a portion of the source X rays to produce the one or more fan-shaped beams. The graded multilayer optic devices include at least a first graded multilayer section for redirecting and transmitting X rays through total internal reflection. The graded multilayer section includes a high-index layer of material having a first complex refractive index n1, a low-index layer of material having a second complex refractive index n2, and a grading zone disposed between the high-index and low-index layers of material. The grading zone includes a grading layer having a third complex refractive index n3 such that Re(n1)>Re(n2)>Re(n3).
    • 描述了产生一个或多个扇形光束的X射线成像系统。 该系统包括用于发射包括至少一个目标焦点的X射线的目标,以及与目标光学通信的一个或多个渐变多层光学器件。 光学器件透射源X射线的至少一部分以产生一个或多个扇形光束。 分级多层光学器件至少包括用于通过全内反射重定向和透射X射线的第一渐变多层部分。 分级多层部分包括具有第一复折射率n1的材料的高折射率层,具有第二复折射率n2的材料的低折射率层,以及设置在高折射率层和低折射率层之间的分级区 的材料。 分级区域包括具有第三复折射率n3的分级层,使得Re(n1)> Re(n2)> Re(n3)。