WAVELENGTH SELECTIVE SWITCH AND OPTICAL CROSS-CONNECT DEVICE INCLUDING WAVELENGTH SELECTIVE SWITCH

    公开(公告)号:US20240365028A1

    公开(公告)日:2024-10-31

    申请号:US18766931

    申请日:2024-07-09

    IPC分类号: H04Q11/00 G02B6/35

    摘要: Provided are a wavelength selective switch capable of dealing with a broadband wavelength range with reduced crosstalk and an optical cross-connect device including the wavelength selective switch. The wavelength selective switch includes an optical input port; an optical output port; a wavelength dispersion unit that spatially separates light incident from the optical input port for each of wavelengths and emits the separated light such that an emission angle of the incident light varies for each of predetermined wavelength ranges; and a deflection unit that couples light incident from the wavelength dispersion unit to the optical output port by deflecting the incident light such that a reflection angle or a transmission angle of the incident light is variable for each of wavelengths, in which the wavelength dispersion unit includes a wavelength dispersive element and a position control mechanism that reversibly changes a position or an angle of the wavelength dispersive element or both the position and the angle with respect to the optical input port.

    OPTICAL DEVICE FOR AUGMENTED REALITY CAPABLE OF PROVIDING HIGH LUMINOUS UNIFORMITY

    公开(公告)号:US20240362869A1

    公开(公告)日:2024-10-31

    申请号:US18646722

    申请日:2024-04-25

    申请人: LETINAR CO., LTD

    IPC分类号: G06T19/00 G02B27/01

    摘要: Provided is an optical device for augmented reality capable of providing high luminous uniformity. According to an aspect of the present invention, there is provided an optical device for augmented reality, the optical device including: an optical means configured to allow virtual image light, output from an image output unit, to propagate through the interior thereof and transmit real object image light therethrough toward a pupil of a user; and a plurality of reflective units disposed in the optical means to transfer the virtual image light toward the pupil of the user; wherein the plurality of reflective units are each configured such that a dielectric coating layer coated with a dielectric material is formed on the reflective surface thereof that reflects incident virtual image light and transfers it to the pupil.

    LENS BARREL
    6.
    发明公开
    LENS BARREL 审中-公开

    公开(公告)号:US20240361677A1

    公开(公告)日:2024-10-31

    申请号:US18770134

    申请日:2024-07-11

    发明人: Nobuyuki KONDO

    IPC分类号: G03B17/14 G02B7/10 H04N23/55

    CPC分类号: G03B17/14 G02B7/10 H04N23/55

    摘要: There is provided a lens barrel from which stable operation feeling of an operation ring is obtained regardless of part accuracy. A stop ring (6) is provided with a ring-shaped multipolar magnet (12) that is magnetized to have multiple poles at regular angular intervals in a circumferential direction. A stationary frame (7) is provided with a sheet metal part (13). The sheet metal part (13) includes a body portion (24A) and a protrusion portion (13B). The body portion (24A) is disposed on a flange (8) of the stationary frame (7), and the protrusion portion (13B) is disposed on the outer periphery of the stationary frame (7). The stop ring (6) is click-stopped at regular angular intervals by a magnetic attractive force acting between the multipolar magnet (12) and the protrusion portion (13B) of the sheet metal part (13). Further, the stop ring (6) is attracted to the flange (8) of the stationary frame (7) by the magnetic attractive force acting between the multipolar magnet (12) and the body portion (24A) of the sheet metal part (13), so that backlash is removed.

    EARBUDS COUPLED TO SMART GLASSES
    7.
    发明公开

    公开(公告)号:US20240361614A1

    公开(公告)日:2024-10-31

    申请号:US18308488

    申请日:2023-04-27

    申请人: Google LLC

    IPC分类号: G02C11/00 G02B27/01 H04R1/10

    摘要: A method includes removably attaching an earbud to a pair of glasses worn by a person. The pair of glasses includes a first speaker configured to deliver sound externally through air or through bone conduction to an ear of the person. The earbud includes a second speaker configured to deliver sound into an ear canal of the person when the earbud is placed in the ear canal. The method further includes establishing a wireless connection between the pair of glasses and the earbud, and detecting a position of the earbud relative to the pair of glasses. The method further includes, when the earbud is detached from the pair of glasses, deactivating the first speaker in the pair of glasses, and activating the second speaker after the earbud is detached from the pair of glasses.

    DISPLAY DEVICE HAVING DIFFRACTION GRATINGS WITH REDUCED POLARIZATION SENSITIVITY

    公开(公告)号:US20240361602A1

    公开(公告)日:2024-10-31

    申请号:US18766282

    申请日:2024-07-08

    申请人: Magic Leap, Inc.

    IPC分类号: G02B27/01 G02B6/34

    摘要: Blazed diffraction gratings provide optical elements in head-mounted display systems to, e.g., incouple light into or out-couple light out of a waveguide. These blazed diffraction gratings may be configured to have reduced polarization sensitivity. Such gratings may, for example, incouple or outcouple light of different polarizations with similar level of efficiency. The blazed diffraction gratings and waveguides may be formed in a high refractive index substrate such as lithium niobate. In some implementations, the blazed diffraction gratings may include diffractive features having a feature height of 40 nm to 120 nm, for example, 80 nm. The diffractive features may be etched into the high index substrate, e.g., lithium niobate.