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    OPTICAL ELEMENT, LASER MODULE, RETINAL PROJECTION DEVICE, AND NEAR-EYE WEARABLE DEVICE
    1.
    发明申请
    OPTICAL ELEMENT, LASER MODULE, RETINAL PROJECTION DEVICE, AND NEAR-EYE WEARABLE DEVICE 有权

    公开(公告)号：US20250138330A1

    公开(公告)日：2025-05-01

    申请号：US18883273

    申请日：2024-09-12

    Applicant: TDK Corporation

    Inventor： Atsushi SHIMURA ,  Yasuhiro TAKAGI ,  Hiroki HARA

    IPC: G02B27/28 ,  G02B27/01

    Abstract: An optical element includes a mode converter that converts a polarization mode of visible light. The mode converter includes a conversion unit that converts a polarization mode of the visible light from a TM0 mode to a TE1 mode, and a splitting unit that splits the visible light in the TE1 mode into a first split light in the TE0 mode and a second split light in the TE0 mode, and adjusts a phase difference between the first split light and the second split light. The splitting unit includes a first branch wave guide through which the first split light propagates and a second branch wave guide through which the second split light propagates. An optical path length of the first split light in the first branch wave guide and an optical path length of the second split light in the second branch wave guide are different from each other.

    OPTICAL COUPLER, VISIBLE LIGHT SOURCE MODULE AND OPTICAL ENGINE
    2.
    发明公开
    OPTICAL COUPLER, VISIBLE LIGHT SOURCE MODULE AND OPTICAL ENGINE 审中-公开

    公开(公告)号：US20240329315A1

    公开(公告)日：2024-10-03

    申请号：US18617839

    申请日：2024-03-27

    Applicant: TDK Corporation

    Inventor： Yasuhiro TAKAGI ,  Hiroki HARA ,  Atsushi SHIMURA

    IPC: G02B6/293 ,  G02B26/10

    CPC classification number: G02B6/29344 ,  G02B26/105

    Abstract: The optical coupler is a multimode interference type optical coupler that couples a plurality of laser lights of different wavelengths. The optical coupler includes an optical coupling main body, two input taper portions which are tapered input ports that are disposed on the input side of the optical coupling main body and of which the width of each becomes narrower as it is away from a connection end with the optical coupling main body, and one output taper portion which is a tapered output port that is disposed on the output side of the optical coupling main body and of which the width becomes narrower as it is away from a connection end with the optical coupling main body.

    OPTICAL MODULATOR, LIGHT SOURCE MODULE, OPTICAL ENGINE, AND XR GLASSES
    3.
    发明公开
    OPTICAL MODULATOR, LIGHT SOURCE MODULE, OPTICAL ENGINE, AND XR GLASSES 审中-公开

    公开(公告)号：US20240329437A1

    公开(公告)日：2024-10-03

    申请号：US18409030

    申请日：2024-01-10

    Applicant: TDK CORPORATION

    Inventor： Hiroki HARA ,  Yasuhiro TAKAGI ,  Atsushi SHIMURA ,  Jiro YOSHINARI

    IPC: G02F1/035 ,  G02B27/01 ,  G02F1/03 ,  G02F1/21 ,  G02F1/225

    CPC classification number: G02F1/035 ,  G02B27/0172 ,  G02F1/0316 ,  G02F1/212 ,  G02F1/225 ,  G02B2027/0178

    Abstract: An optical modulator is a Mach-Zehnder-type optical modulator having a substrate and an optical waveguide layer including a lithium niobate film formed on the substrate. The optical waveguide layer includes a plurality of flat portions and n ridge portions arranged between the flat portions to be adjacent, where n is two or more. Each of the n ridge portions includes a main waveguide to which visible light is input, a first multimode interference waveguide through which the main waveguide is branched into a first and a second optical branch waveguide, and a second multimode interference waveguide through which the first and the second optical branch waveguide are coupled to form a coupling waveguide. Visible light beams having different wavelengths are input to the n ridge portions. The first multimode interference waveguide and the second multimode interference waveguide have shorter lengths when input light having a longer wavelength is transmitted.

    MAGNETORESISTIVE EFFECT DEVICE
    5.
    发明申请
    MAGNETORESISTIVE EFFECT DEVICE 有权
    磁阻效应器件

    公开(公告)号：US20160277000A1

    公开(公告)日：2016-09-22

    申请号：US15066350

    申请日：2016-03-10

    Applicant: TDK CORPORATION

    Inventor： Tetsuya SHIBATA ,  Junichiro URABE ,  Atsushi SHIMURA ,  Takekazu YAMANE

    IPC: H01P7/00 ,  H03H1/00

    CPC classification number: H03H1/0007 ,  H01L43/00 ,  H01L43/08 ,  H03H2/00 ,  H03H2001/0057 ,  H03H2001/0085

    Abstract: A magnetoresistive effect device includes a magnetoresistive effect element including a magnetization fixed layer, a spacer layer, and a magnetization free layer; a first port; a second port; a signal line; an impedance element; and a direct-current input terminal. The first port, the magnetoresistive effect element, and the second port are connected in series in this order via the signal line. The impedance element is connected to ground and to the signal line between the magnetoresistive effect element and the first port or the second port. The direct-current input terminal is connected to the signal line at the opposite side to the impedance element with the magnetoresistive effect element in between the direct-current input terminal and the impedance element. A closed circuit including the magnetoresistive effect element, the signal line, the impedance element, the ground, and the direct-current input terminal is to be formed.

    Abstract translation: 磁阻效应器件包括具有磁化固定层，间隔层和无磁化层的磁阻效应元件; 第一个港口 第二个港口 信号线 阻抗元件; 和直流输入端子。 第一端口，磁阻效应元件和第二端口通过信号线依次串联连接。 阻抗元件连接到地和磁阻效应元件与第一端口或第二端口之间的信号线。 直流输入端子与阻抗元件相反侧的信号线连接到直流输入端子和阻抗元件之间的磁阻效应元件。 将形成包括磁阻效应元件，信号线，阻抗元件，接地和直流输入端子的闭合电路。

    OPTICAL COUPLER, OPTICAL COUPLING MEMBER, VISIBLE LIGHT SOURCE MODULE, AND OPTICAL ENGINE
    6.
    发明公开
    OPTICAL COUPLER, OPTICAL COUPLING MEMBER, VISIBLE LIGHT SOURCE MODULE, AND OPTICAL ENGINE 审中-公开

    公开(公告)号：US20240329323A1

    公开(公告)日：2024-10-03

    申请号：US18429669

    申请日：2024-02-01

    Applicant: TDK CORPORATION

    Inventor： Atsushi SHIMURA ,  Yasuhiro TAKAGI ,  Hiroki HARA ,  Jiro YOSHINARI

    IPC: G02B6/35 ,  G02B6/27

    CPC classification number: G02B6/354 ,  G02B6/272

    Abstract: This optical coupler includes a plurality of light input ports to which a plurality of visible light beams can be input, a light output port capable of coupling all of the plurality of visible light beams and outputting coupled light, an optical coupling portion to which a light-input-side optical waveguide and a light-output-side optical waveguide are connected, and at least one high-order mode removal portion provided to remove a high mode with respect to each of the plurality of visible light beams. The optical coupling portion and each high-order mode removal portion are arranged so that each of the plurality of visible light beams passes through only a high-order mode removal portion for visible light or passes through only the high-order mode removal portion for the visible light and a high-order mode removal portion for visible light having a shorter wavelength than the visible light.

    MAGNETORESISTIVE EFFECT DEVICE
    9.
    发明申请
    MAGNETORESISTIVE EFFECT DEVICE 审中-公开

    公开(公告)号：US20180040666A1

    公开(公告)日：2018-02-08

    申请号：US15662697

    申请日：2017-07-28

    Applicant: TDK CORPORATION

    Inventor： Tetsuya SHIBATA ,  Tsuyoshi SUZUKI ,  Junichiro URABE ,  Takekazu YAMANE ,  Atsushi SHIMURA

    IPC: H01L27/22 ,  H03H7/01 ,  H03H1/00 ,  H01L43/02 ,  H01L43/08

    CPC classification number: H01L27/22 ,  G11B5/3903 ,  G11B5/3945 ,  H01L43/02 ,  H01L43/08 ,  H03H1/0007 ,  H03H2/00 ,  H03H7/0153

    Abstract: A magnetoresistive effect device includes a first magnetoresistive effect element, a second magnetoresistive effect element, a first port, a second port, a signal line, and a direct-current input terminal. The first port, the first magnetoresistive effect element, and the second port are connected in series to each other in this order via the signal line. The second magnetoresistive effect element is connected to the signal line in parallel with the second port. The first magnetoresistive effect element and the second magnetoresistive effect element are formed so that the relationship between the direction of direct current that is input from the direct-current input terminal and that flows through the first magnetoresistive effect element and the order of arrangement of a magnetization fixed layer, a spacer layer, and a magnetization free layer in the first magnetoresistive effect element is opposite to the above relationship in the second magnetoresistive effect element.

    MAGNETORESISTIVE EFFECT DEVICE
    10.
    发明申请
    MAGNETORESISTIVE EFFECT DEVICE 有权

    公开(公告)号：US20170244377A1

    公开(公告)日：2017-08-24

    申请号：US15439640

    申请日：2017-02-22

    Applicant: TDK CORPORATION

    Inventor： Takekazu YAMANE ,  Tetsuya SHIBATA ,  Junichiro URABE ,  Atsushi SHIMURA

    IPC: H03H7/06 ,  H01L43/02 ,  H01L43/10 ,  H01L43/08

    CPC classification number: H03H7/06 ,  H01L43/02 ,  H01L43/08 ,  H01L43/10 ,  H03H2/00

    Abstract: A magnetoresistive effect device includes at least one magnetoresistive effect element including a magnetization fixed layer, a spacer layer, and a magnetization free layer, a first port, a second port, a first signal line which is connected to the first port and through which high-frequency current corresponding to a high-frequency signal input into the first port flows, a second signal line, and a direct-current input terminal. The magnetoresistive effect element is arranged so that a high-frequency magnetic field occurring from the first signal line is applied to the magnetization free layer. The magnetoresistive effect element is connected to the second port via the second signal line. The direct-current input terminal is connected to the magnetoresistive effect element.

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