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151 条记录 (耗时 0.022 秒)

    Semi-thick transmissive and reflective sinusoidal phase grating structures
    22.
    发明授权
    Semi-thick transmissive and reflective sinusoidal phase grating structures 失效
    半厚透射和反射正弦相位光栅结构

    公开(公告)号：US4426130A

    公开(公告)日：1984-01-17

    申请号：US235972

    申请日：1981-02-19

    申请人： Karl H. Knop

    发明人： Karl H. Knop

    IPC分类号： G02B5/18

    CPC分类号： G02B5/1823

    摘要： Markedly increased optical efficiency for a first diffraction order of incident wave energy, such as light, is derived from a layer of transparent material having effectively two serially spaced sinusoidal phase gratings of the same line spacing, each formed as a surface relief pattern thereon, by prescribing the thickness of the layer, the amplitude of the gratings, the respective indices-of-refraction of the layers and of transparent materials bounding the phase grating surfaces thereof, and the angle of incidence of the wave energy.

    摘要翻译： 对于诸如光的入射波能的第一衍射级的显着提高的光学效率源自透明材料层，其具有有效的两个串行间隔的具有相同线间距的正弦相位光栅，每个正弦相位光栅通过 规定层的厚度，光栅的幅度，层的相应折射率和包围其相位光栅表面的透明材料以及波能的入射角。

    ARCHITECTURE TO ENHANCE IMAGE SHARPNESS OF WAVEGUIDE DISPLAYS
    23.
    发明公开
    ARCHITECTURE TO ENHANCE IMAGE SHARPNESS OF WAVEGUIDE DISPLAYS 审中-公开

    公开(公告)号：US20240361525A1

    公开(公告)日：2024-10-31

    申请号：US18647537

    申请日：2024-04-26

    申请人： Applied Materials, Inc.

    发明人： Kunal SHASTRI ,  David Alexander SELL

    IPC分类号： G02B6/122 ,  G02B5/18 ,  G02B6/12

    CPC分类号： G02B6/1228 ,  G02B5/1823 ,  G02B2006/12107

    摘要： Embodiments described provide for waveguide combiners with phase matching regions. The waveguide includes one or more gratings. The one or more gratings includes grating structures disposed over a waveguide substrate. A phase matching region is disposed over the waveguide substrate between the one or more gratings and a waveguide region. The phase matching region includes a waveguide layer having a thickness varying from a first end to a second end of the waveguide layer, or a plurality of structures having depths therebetween. The one or more of the depths are different from each other, or at least two or more structures of the plurality of structures have a first duty cycle different than a second duty cycle of the plurality of structures.

    DIFFRACTIVE OPTICAL ELEMENT, OPTICAL APPARATUS, DISPLAY APPARATUS, AND IMAGING APPARATUS
    24.
    发明公开
    DIFFRACTIVE OPTICAL ELEMENT, OPTICAL APPARATUS, DISPLAY APPARATUS, AND IMAGING APPARATUS 审中-公开

    公开(公告)号：US20240319418A1

    公开(公告)日：2024-09-26

    申请号：US18611287

    申请日：2024-03-20

    申请人： CANON KABUSHIKI KAISHA

    发明人： KUMIKO YASHIMA ,  HIDEO GENDA ,  KOUICHI YONETANI ,  HIROYUKI TANAKA

    IPC分类号： G02B5/18

    CPC分类号： G02B5/1823 ,  G02B5/1842 ,  G02B5/1895

    摘要： A diffractive optical element includes: a substrate having a surface on which a diffraction grating is provided; and a resin layer provided on the surface of the substrate so as to cover the diffraction grating, wherein, in plan view as viewed along an optical axis direction, the diffraction grating includes: a first diffraction grating having a circular shape; and a second diffraction grating having an arc shape, the second diffraction grating being arranged on an outer side of the first diffraction grating, wherein the diffractive optical element includes an optical effective region and a non-optical effective region surrounding the optical effective region, wherein the second diffraction grating has an arc end positioned in the non-optical effective region, and wherein a thickness of the resin layer provided in the non-optical effective region is larger than a thickness of the resin layer provided in the optical effective region.

    Diffractive optical elements for large-field image display
    26.
    发明授权
    Diffractive optical elements for large-field image display 有权

    公开(公告)号：US11994689B2

    公开(公告)日：2024-05-28

    申请号：US15733635

    申请日：2019-10-18

    申请人： GOOGLE LLC

    发明人： Khoa Nguyen

    IPC分类号： G02B27/42 ,  G02B5/18 ,  G02B27/10

    CPC分类号： G02B27/4272 ,  G02B5/1823 ,  G02B27/10 ,  G02B27/4205

    摘要： Techniques of generating a wavefront modulating element (WME) for imaging an object over a large image field include (i) designing a WME by breaking a large image into smaller sub-images and then applying an inverse imaging operation to find a segment of a plurality of segments (324-1 to-334-n) of a WME (in the from of DOE) producing a sub-image, and (ii) specifying an optical system to illuminate the WME resulting from each of the plurality of segments in such a way that the large image is reproduced as closely as possible. Along these lines, given a large target image in the far-field, a WME generation system decomposes the target image into sub-images. From this decomposition, the WME generation system then produces WME segments corresponding to the sub-images. The WME segments are then arranged in an optical system such that abeam of electromagnetic radiation (316) is reproduced into sub-beams that are normally incident on the WME segments (for example by gratings 332 diffracting light towards a DOE and back into a lightguide 320).