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20718 条记录 (耗时 0.036 秒)

    Method of multi-zone grouped and light-homogenized Fresnel lens for concentrating system
    6.
    发明授权
    Method of multi-zone grouped and light-homogenized Fresnel lens for concentrating system 有权

    公开(公告)号：US12130451B1

    公开(公告)日：2024-10-29

    申请号：US18755976

    申请日：2024-06-27

    申请人： Xidian University

    发明人： Guanheng Fan ,  Baoyan Duan ,  Yiqun Zhang ,  Shimin Cao ,  Kunpeng Liu ,  Dongxu Wang

    IPC分类号： G02B3/08 ,  G02B27/00

    CPC分类号： G02B3/08 ,  G02B27/0012

    摘要： A design method of a multi-zone grouped and light-homogenized Fresnel lens for a concentrating system includes: step 1, designing, according to a basic principle of a Fresnel lens, a planar Fresnel lens; step 2, establishing, according to an optical path characteristic of the concentrating system, an optical path equation of the concentrating system; step 3, determining a differential form of uniform distribution of luminous energy density; and step 4, based on the step 3, calculating design parameters of the multi-zone grouped and light-homogenized Fresnel lens to obtain the multi-zone grouped and light homogenized Fresnel lens. The obtained Fresnel lens can realize low-power concentrating, solve the problem that luminous energy is too concentrated under a high-power light-concentrating ratio, achieve high-uniformity design under different light-concentrating ratios, and improve the light-homogenized performance of the concentrating system, thereby solving non-uniform luminous energy density distribution on a surface of a photovoltaic cell.

    Lens driving apparatus, and camera module and optical device comprising same
    7.
    发明授权
    Lens driving apparatus, and camera module and optical device comprising same 有权

    公开(公告)号：US12130448B2

    公开(公告)日：2024-10-29

    申请号：US16961051

    申请日：2018-12-26

    申请人： LG INNOTEK CO., LTD.

    发明人： Hyun Soo Kim ,  Sung Guk Lee ,  Jung Seok Oh ,  Seung Hak Lee

    IPC分类号： G02B27/00 ,  G02B7/08 ,  G02B27/64 ,  H04N23/00

    CPC分类号： G02B27/64 ,  G02B7/08 ,  H04N23/00

    摘要： An embodiment comprises: a housing including a first corner portion, a second corner portion, a third corner portion, and a fourth corner portion; a bobbin disposed within the housing; a coil disposed on the bobbin; a magnet disposed in the housing while being arranged opposite to the coil; a circuit board disposed on one side of the housing and including a position sensor; and a sensing magnet disposed on the bobbin while being arranged opposite to the position sensor, wherein: the magnet comprises a first magnet disposed in the first corner portion of the housing, and a second magnet disposed in the second corner portion opposite to the first corner portion of the housing; the position sensor is disposed closer to the third corner portion than to the first corner portion; and no magnet is disposed in the third corner portion of the housing.

    Light guide element and image display apparatus
    8.
    发明授权
    Light guide element and image display apparatus 有权

    公开(公告)号：US12130435B2

    公开(公告)日：2024-10-29

    申请号：US17521027

    申请日：2021-11-08

    申请人： FUJIFILM Corporation

    发明人： Hiroshi Sato ,  Katsumi Sasata ,  Yukito Saitoh

    IPC分类号： G02B27/00 ,  G02B5/30 ,  G02B27/01 ,  G02B27/42

    CPC分类号： G02B27/0172 ,  G02B5/3016 ,  G02B27/4205

    摘要： Provided are a light guide element and an image display apparatus capable of suppressing the occurrence of multiple images. The light guide element includes a light guide plate and a first incidence diffraction element, a second incidence diffraction element, a first emission diffraction element, and a second emission diffraction element that are provided on the light guide plate, in which the first and second incidence diffraction elements diffract incident light in different directions to be incident into the light guide plate, the first emission diffraction element emits light that is diffracted by the first incidence diffraction element and propagates in the light guide plate, the second emission diffraction element emits light that is diffracted by the second incidence diffraction element and propagates in the light guide plate, a period of a diffraction structure of the first incidence diffraction element and a period of a diffraction structure of the second incidence diffraction element are different from each other, a period of a diffraction structure of the first emission diffraction element and a period of a diffraction structure of the second emission diffraction element are different from each other, the first and second emission diffraction elements are disposed at a position where the first and second emission diffraction elements overlap each other in a plane direction of a main surface of the light guide plate, and a periodic direction of the diffraction structure of the first emission diffraction element and a periodic direction of the diffraction structure of the second emission diffraction element intersect with each other.

    Imaging optical system and imaging device
    9.
    发明授权
    Imaging optical system and imaging device 有权

    公开(公告)号：US12130415B2

    公开(公告)日：2024-10-29

    申请号：US17421733

    申请日：2020-02-19

    申请人： Yuji Toriumi ,  Hiroyuki Satoh

    发明人： Yuji Toriumi ,  Hiroyuki Satoh

    IPC分类号： G02B13/00 ,  G02B27/10 ,  G02B27/00

    CPC分类号： G02B13/0065 ,  G02B13/0045 ,  G02B27/1066 ,  G02B27/0025

    摘要： An imaging optical system includes a plurality of optical systems each including a plurality of optical members, a first reflection member, disposed for each one of the optical systems, configured to reflect light when the light passing through the plurality of optical members, and a variable aperture member having an opening disposed at an image sensor side when viewed from the first reflection member, the variable aperture member configured to change a size of the opening through which the light reflected from the first reflection member passes through, and at least a part of the variable aperture member is disposed at a position overlapping with an area corresponding to a first lens, disposed at the most object side in the plurality of optical members, along an optical axis direction.

    DRIVING MULTIPLE ILLUMINATORS USING A SINGLE CONTROLLER RECEIVING MULTIPLE TRIGGER SIGNALS
    10.
    发明公开
    DRIVING MULTIPLE ILLUMINATORS USING A SINGLE CONTROLLER RECEIVING MULTIPLE TRIGGER SIGNALS 审中-公开

    公开(公告)号：US20240355245A1

    公开(公告)日：2024-10-24

    申请号：US18442442

    申请日：2024-02-15

    申请人： Meta Platforms Technologies, LLC

    发明人： Liyao Wu ,  Wen Cai ,  Jun Li

    IPC分类号： G09G3/00 ,  G02B27/00 ,  G02B27/01

    CPC分类号： G09G3/002 ,  G02B27/0093 ,  G02B27/0172 ,  G09G3/003 ,  G02B2027/0178

    摘要： A headset, such as an artificial reality headset, includes one or more illuminators that emit light. A controller, such as an application specific integrated circuit (ASIC) is coupled to a plurality of illuminators. The controller receives multiple trigger signals and generates pulse signals for activating different illuminators in response to each trigger signal. For example, a controller receives at least two trigger signals that can be used to drive different illuminators having different modalities (e.g., eye tracking, depth sensing, etc.). Each trigger signal can occur at a different time than other trigger signals, or may have a different characteristic (e.g., amplitude, pulse width, frequency, etc.) than other trigger signals. Pulse signals generated by the controller for different illuminators based on different trigger signals can also have different characteristics.