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    • 8. 发明授权
    • Multi-beam, high efficiency diffractive optics system formed in a single substrate
    • 多光束,高效衍射光学系统形成于单个基板上
    • US08547642B2
    • 2013-10-01
    • US12603744
    • 2009-10-22
    • Ye ChenBing ShaoPengyue Wen
    • Ye ChenBing ShaoPengyue Wen
    • G02B27/30G02B6/34
    • G02B27/42G02B5/1814G02B27/1093
    • An optics system is provided that is made up of a single diffractive optical element that performs beam collimating, beam splitting, and light blocking functions. The diffractive optical element is made up of a substrate having a first surface comprising an entrance facet and a second surface comprising an exit facet. The first surface comprising the entrance facet performs at least the functions of collimating the beam of light produced by the light source and of tilting the collimated beam in a particular direction. The second surface comprising the exit facet performs at least the functions of splitting the tilted collimated beam into at least two collimated light beams and of blocking unintended light (i.e., one or more mode order groups that are not intended to be used for imaging purposes). By performing all of these functions on different surfaces of a single substrate, an extremely compact optics system having very high optical efficiency and a very high signal-to-noise ratio is realized.
    • 提供了由执行光束准直,分束和遮光功能的单个衍射光学元件组成的光学系统。 衍射光学元件由具有包括入射面的第一表面和包括出射面的第二表面的基板构成。 包括入射面的第一表面至少执行准直由光源产生的光束并使准直光束沿特定方向倾斜的功能。 包括出射小面的第二表面至少执行将倾斜的准直光束分成至少两个准直光束并阻挡非预期光的功能(即,不旨在用于成像目的的一个或多个模式顺序组) 。 通过在单个基板的不同表面上执行所有这些功能,实现了具有非常高的光学效率和非常高的信噪比的非常紧凑的光学系统。