Optical detector for measuring respective phases of multiple beams apparatus and method

    公开(公告)号:US09945731B1

    公开(公告)日:2018-04-17

    申请号:US14596825

    申请日:2015-01-14

    Abstract: A system includes a source of laser beams forming an array, a source of a reference laser beam, and an optical detector for measuring respective phase differences between the array laser beams and the reference laser beam. The system includes a mask, having apertures with a shape, size and position identical to a shape, size and position of the array laser beams, and positioned in the reference laser beam to form respective beams of the reference laser beam corresponding to the beams from the array laser beams. A phase modulator phase modulates respective beams of one of (a) the array laser beams and (b) the beams of the reference laser from the mask. A photodetector receives the respective array laser beams and the corresponding reference laser beams from the mask to generate a composite signal. Processing circuitry is responsive to the composite signal for generating respective signals representing the phase differences of the individual laser beams from the reference laser beam.

    Fast-acting antimicrobial surfaces, and methods of making and using the same

    公开(公告)号:US12239129B2

    公开(公告)日:2025-03-04

    申请号:US17713356

    申请日:2022-04-05

    Abstract: An antimicrobial coating is disclosed that provides fast transport rates of biocides for better effectiveness to deactivate SARS-CoV-2 and other viruses or bacteria on common surfaces. Some variations provide an antimicrobial structure comprising: a solid structural phase comprising a solid structural material; a continuous transport phase that is interspersed within the solid structural phase, wherein the continuous transport phase comprises a solid transport material; and an antimicrobial agent contained within the continuous transport phase, wherein the solid structural phase and the continuous transport phase are separated by an average phase-separation length from about 100 nanometers to about 500 microns. The antimicrobial structure is capable of destroying at least 99.99% of bacteria and/or viruses in 10 minutes of contact. Many options are disclosed for suitable materials to form the solid structural phase, the continuous transport phase, and the antimicrobial agent.

    Highly stable chip-scale atomic beam clocks using miniaturized atomic beams and monolithic clock chips

    公开(公告)号:US12160242B1

    公开(公告)日:2024-12-03

    申请号:US18197041

    申请日:2023-05-13

    Abstract: A low-power, chip-scale atomic beam clock is provided that maintains high precision for at least one week at any practical temperature. In some variations, the invention provides a chip-scale atomic beam clock comprising: a micro-optical bench; an atom collimator configured to generate a collimated atomic beam via differential pumping through microchannels; a VCSEL configured to emit laser photons horizontally in the plane of the micro-optical bench; an in-plane lithographically defined diffraction grating configured to split the laser photons into a first photon beam and a second photon beam; in-plane lithographically defined mirrors configured to retroflect the photon beams; in-plane photodetectors configured to detect the photon beams after being retroflected, wherein the first photon beam and the second photon beam interrogate the collimated atomic beam in-plane with the micro-optical bench. The chip-scale atomic beam clocks is capable of maintaining precise positioning, navigation, and timing in case of GPS denial or failure.

    Modular Inertial Measurement Unit and elements for making same

    公开(公告)号:US20240318961A1

    公开(公告)日:2024-09-26

    申请号:US18123984

    申请日:2023-03-21

    CPC classification number: G01C21/16

    Abstract: A corner bracket comprising a volume of matter having n pairs of parallel faces, where n is an integer larger than 2; each face of each pair of parallel faces comprising an opening; the openings in the faces of each pair of parallel faces being joined by a cylindrical recess having a longitudinal axis perpendicular to the faces joined by the cylindrical recess; the longitudinal axis of the cylindrical recesses being arranged such that the cylindrical recesses do not intersect each other. The number n can be 3 and the volume of matter can be a cube.

    METHODS FOR TAILORING THE MAGNETIC PERMEABILITY OF SOFT MAGNETS, AND SOFT MAGNETS OBTAINED THEREFROM

    公开(公告)号:US20240308002A1

    公开(公告)日:2024-09-19

    申请号:US18673653

    申请日:2024-05-24

    CPC classification number: B23K26/342 B22F10/28 B33Y10/00 H01F1/147 B22F2998/10

    Abstract: Some variations provide a method of tailoring the surface of a soft magnet, comprising: depositing an austenite-phase-stabilizing donor material on one or more first surface regions of a ferromagnetic receiver material; not depositing the austenite-phase-stabilizing donor material on one or more second surface regions of the ferromagnetic receiver material; laser melting the austenite-phase-stabilizing donor material into the first surface regions; and solidifying the molten austenite-phase-stabilizing donor material within the first surface regions, thereby selectively alloying the ferromagnetic receiver material in the first surface regions. Laser ablation may be utilized instead of laser melting. The first surface regions have a significantly higher magnetic permeability, following the selective alloying of the donor material, compared to the second surface regions. Soft magnets with surface-tailored magnetic permeability are provided by this technology, which is demonstrated using several examples. One commercial application is selectively alloyed soft magnets for a rotor in an electric motor.

    Multi-agent planning and autonomy
    10.
    发明授权

    公开(公告)号:US12061673B1

    公开(公告)日:2024-08-13

    申请号:US17167001

    申请日:2021-02-03

    CPC classification number: G06F18/2185 G06N3/086

    Abstract: Described is a system for controlling multiple autonomous platforms. A training process is performed to produce a trained learning agent in a simulation environment. In each episode, each controlled platform is assigned to one target platform that produces an observation. A learning agent processes the observation using a deep learning network and produces an action corresponding to each controlled platform until an action has been produced for each controlled platform. A reward value is obtained corresponding to the episode. The trained learning agent is executed to control each autonomous platform, where the trained agent receives one or more observations from one or more platform sensors and produces an action based on the one or more observations. The action is then used to control one or more platform actuators.

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