Optical systems and devices for monitoring a light signal

    公开(公告)号:US11835383B2

    公开(公告)日:2023-12-05

    申请号:US17546279

    申请日:2021-12-09

    Applicant: GOOGLE LLC

    Abstract: There is provided an optical system comprising a light conduit. The light conduit comprises a first light pipe, a second light pipe, and a first bridge to mechanically couple the first light pipe to the second light pipe. The first light pipe has a first inlet to receive a first input light signal and a first outlet to emit at least a portion of the first input light signal to form a first output light signal. Moreover, the second light pipe has a second inlet to receive a second input light signal and a second outlet to emit at least a portion of the second input light signal to form a second output light signal. Furthermore, the first bridge has a first end mechanically coupled to the first light pipe and a second end mechanically coupled to the second light pipe.

    PHOTODETECTORS AND PHOTODETECTOR ARRAYS
    96.
    发明公开

    公开(公告)号:US20230378386A1

    公开(公告)日:2023-11-23

    申请号:US18358817

    申请日:2023-07-25

    Applicant: ActLight SA

    Abstract: A dynamic photodiode detector or detector array having a light absorbing region of doped semiconductor material for absorbing photons. Electrons or holes generated by photon absorption are detected with a construction of oppositely heavily doped anode and cathode regions and a heavily doped ground region of the same doping type as the anode region. Photon detection involves switching the device from reverse bias to forward bias to create a depletion region enclosing the anode region. When a photon is then absorbed the electron or hole thereby generated drifts under the electric field induced by the biasing to the depletion region where it causes the anode-to-ground current to increase. Furthermore, the detector is configured such that anode-to-cathode current starts to flow once a threshold number of electrons or holes reaches the depletion region, where the threshold may be one to provide single photon detection.

    Pyranometer
    97.
    发明授权

    公开(公告)号:US11821786B1

    公开(公告)日:2023-11-21

    申请号:US17928324

    申请日:2022-05-10

    CPC classification number: G01J1/42 G01J1/44 G01J2001/4285 G01J2001/444

    Abstract: A pyranometer is provided which can measure the precise amount of solar radiation/solar irradiance continuously and stably while suppressing the generation of dew or frost by a simple configuration even in changing external environment. A pyranometer includes: a housing having an opening, and having thermal conductivity; a dome provided at the opening, and having light transmittance; a sensor part provided in an internal space formed by the housing and the dome, and for measuring an intensity of a sunlight made incident through the dome; and a heat generating element provided heat conductably to a part of the housing, opposite to the opening across the internal space.

    Method for measuring ambient light and corresponding integrated device

    公开(公告)号:US11808624B2

    公开(公告)日:2023-11-07

    申请号:US17500432

    申请日:2021-10-13

    CPC classification number: G01J1/4204 G01J1/44 G01J2001/446

    Abstract: In an embodiment a method for measuring ambient light includes successively synchronizing optical signal acquisition phases with extinction phases of a disruptive light source, wherein the disruptive light source periodically provides illumination phases and the extinction phases, accumulating, in each acquisition phase, photo-generated charges by at least one photosensitive pixel comprising a pinned photodiode, transferring the accumulated photo-generated charges to an integration node and integrating, for each pixel, the transferred charges on the integration node during a series of the successive acquisition phases.

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