DIFFRACTION GRATING DEVICE AND OPTICAL APPARATUS
    2.
    发明申请
    DIFFRACTION GRATING DEVICE AND OPTICAL APPARATUS 失效
    衍射光栅设备和光学设备

    公开(公告)号:US20090135487A1

    公开(公告)日:2009-05-28

    申请号:US12112260

    申请日:2008-04-30

    IPC分类号: G02B5/18

    摘要: A diffraction grating device for splitting or coupling light beams permits the divergence of the light beams to be minimized easily. A first light beam is incident on a diffraction grating from the side thereof facing the inside of the device, and a second light beam is incident on the diffraction grating from the side thereof facing air. The diffraction grating transmits the first light beam by diffraction of the minus first order so that it travels in the reverse direction along the optical path of the second light beam before incidence, and transmits the second light beam by diffraction of the zero order. The second light beam, transmitted by diffraction of the zero order, spreads over a certain width of wavelengths, but does not diverge even after diffraction.

    摘要翻译: 用于分束或耦合光束的衍射光栅装置允许光束的发散被容易地最小化。 第一光束从面向设备内侧的一侧入射在衍射光栅上,第二光束从面向空气的一侧入射到衍射光栅上。 衍射光栅通过负一阶的衍射传输第一光束,使得它在入射之前沿着第二光束的光路在相反方向上行进,并且通过零级的衍射透射第二光束。 通过零级衍射传输的第二光束在一定波长的宽度上扩散,但即使在衍射之后也不会发散。