Inductive damping brain sensor
    92.
    发明授权

    公开(公告)号:US11890097B2

    公开(公告)日:2024-02-06

    申请号:US17179018

    申请日:2021-02-18

    Abstract: Medical diagnostic devices and related methods of use are described in which one or multiple coils in a sensor, each coil connected with an RLC circuit and frequency counter, are held against a patient's head at predetermined cranial locations. Frequencies of the RLC circuit are measured and compared against those taken from known, control heads, to determine whether there is a medical problem and what type of problem. In some instances, too high of frequencies can reveal pooled blood in the head, a sign of hemorrhagic stroke, while too low of frequencies imply lack of blood supply, a sign of ischemic stroke. A head-mountable frame can assist a first responder in securing and guiding the coils and, along with fiducials, allow for automatic comparison of frequencies with the correct control data.

    Control light intensity through scattering media with speckle intensity sequencing

    公开(公告)号:US11835733B2

    公开(公告)日:2023-12-05

    申请号:US17023070

    申请日:2020-09-16

    Abstract: Optical wavefront shaping has been the standard technique to control light through scattering media. Implicit in this dominance is the assumption that knowledge of the optical phase is a necessity for optical control through scattering media. In this paper, we challenge this assumption by reporting on an intensity-only approach for light control through (or reflected from) a disordered scattering medium—optical-channel-based intensity streaming (OCIS). Instead of actively tuning the interference between the optical paths via wavefront shaping, OCIS can control light and transmit information through or from scattering media with linear intensity operation, which not only simplifies and speeds up the system but also enables new applications. We experimentally created focus patterns through scattering media in a sub-millisecond timescale with a phase-manipulation-free setup. We also demonstrate that, unlike wavefront shaping, OCIS can readily generate distinct energy null points through scattering media. Finally, we demonstrate that OCIS enables a scattering medium mediated secure optical communication application.

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