WAVEFRONT MANIPULATOR AND OPTICAL DEVICE
    3.
    发明公开

    公开(公告)号:US20240353671A1

    公开(公告)日:2024-10-24

    申请号:US18684113

    申请日:2022-08-10

    申请人: Carl Zeiss AG

    摘要: A wavefront manipulator has at least a first optical component and a second optical component arranged in succession along a reference axis. The first optical component and the second optical component are arranged so as to be movable relative to one another perpendicular to the reference axis. The first optical component and the second optical component each include a first optical element and at least one further optical element with differing refractive index profiles η1(λ) and ηi(λ) arranged in succession along the reference axis, with the optical elements having, in relation to local coordinates x and y of the optical components, a spatially dependent length Δz(x,y) in the z-direction parallel to the reference axis.

    Light field projection method
    6.
    发明授权

    公开(公告)号:US12117623B2

    公开(公告)日:2024-10-15

    申请号:US18329842

    申请日:2023-06-06

    IPC分类号: G02B3/00

    CPC分类号: G02B3/0062

    摘要: A direct projection light field display comprising an array of projectors for direct projection of a light field. The overall design and incorporation of additional optics achieve the optimal light distribution and small pixel size to produce a high definition, 3D display. The architecture of the direct projection light field display has low a brightness requirement for each projector, resulting in an increased projector density, decreased system, and a decreased power requirement, while producing a high-definition light field.

    SECURE DOCUMENT AND METHOD FOR MANUFACTURING A SECURE DOCUMENT

    公开(公告)号:US20240336082A1

    公开(公告)日:2024-10-10

    申请号:US18624218

    申请日:2024-04-02

    申请人: IDEMIA FRANCE

    摘要: The present invention relates to a secure document and to a method for manufacturing a secure document. The secure document comprises:



    a metal layer or metal oxide layer,
    a lenticular array comprising converging lenses positioned facing the metal layer or metal oxide layer,
    at least one transparent layer on which the metal layer or metal oxide layer is arranged such that said metal layer or metal oxide layer is interposed between the lenticular array and the transparent layer;
    wherein the metal layer or metal oxide layer comprises perforations formed by focusing a plurality of laser radiations through the lenticular array onto the metal layer or metal oxide layer, the plurality of laser radiations being directed at a plurality n of angles of incidence in order to form said perforations so as to reveal n personalized images when the secure document is observed at the n angles of incidence,
    said perforations being produced in contiguous or overlapping perforation areas so as to form visual continuity between the n personalized images when said document is tilted.

    Optical stacks for detection systems

    公开(公告)号:US12105302B2

    公开(公告)日:2024-10-01

    申请号:US18568323

    申请日:2022-06-28

    摘要: An integral optical stack includes a lens film having first and second major surfaces. The first major surface includes microlenses having an average peak-to-valley height PV1. A light absorbing layer is disposed on the lens film and defines a plurality of openings. A substantially planarizing optically diffusive layer is disposed on the first major surface of the lens film, conforming to the microlenses. The optically diffusive layer includes a plurality of nanoparticles. A polymeric material bonds the nanoparticles to each other to form a plurality of nanoparticle aggregates defining a plurality of voids therebetween. The optically diffusive layer has an average thickness greater than about 8 microns, and an index of refraction of less than about 1.25. Any non-planarity of a major surface of the optically diffusive layer due to the microlenses of the first major surface has an average peak-to-valley height PV2, PV2≤0.7 PV1.