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    DETECTION OF POLYETHYLENE AND SILICON OR OTHER MATERIAL COMBINATIONS USED IN MOTION SENSORS OR OTHER DEVICES
    31.
    发明申请
    DETECTION OF POLYETHYLENE AND SILICON OR OTHER MATERIAL COMBINATIONS USED IN MOTION SENSORS OR OTHER DEVICES 有权

    公开(公告)号：US20220018871A1

    公开(公告)日：2022-01-20

    申请号：US16932030

    申请日：2020-07-17

    Applicant: Raytheon Company

    Inventor： Gary A. Frazier ,  Randy L. Gann

    IPC: G01P13/00 ,  G08B13/19 ,  G01N21/65 ,  G01V8/10

    Abstract: A method includes transmitting first optical energy towards a space being scanned. The method also includes detecting one or more instances of a first material in the space using first return optical energy, where the first return optical energy is based on the transmitted first optical energy. The method further includes, for each of the one or more instances of the first material, transmitting second optical energy towards a portion of the space in which the instance of the first material was detected. The method also includes detecting one or more instances of a second material in the space using second return optical energy, where the second return optical energy is based on the transmitted second optical energy. In addition, the method includes identifying a presence of at least one type of device in the space based on instances of the first and second materials detected in the space.

    SYSTEM AND METHOD TO MAINTAIN VACUUM, OR TO SELECTIVELY EXCLUDE/ADMIT ELECTROMAGNETIC ENERGY
    32.
    发明申请
    SYSTEM AND METHOD TO MAINTAIN VACUUM, OR TO SELECTIVELY EXCLUDE/ADMIT ELECTROMAGNETIC ENERGY 有权

    公开(公告)号：US20220003222A1

    公开(公告)日：2022-01-06

    申请号：US17361505

    申请日：2021-06-29

    Applicant: Raytheon Company

    Inventor： Gary A. Frazier ,  Catherine Trent

    IPC: F03H1/00

    Abstract: A conduit is placed between a vacuum system and the open air or other gaseous environment. A laser or other excitation source is used to ionize the air on the air-side of the conduit. An axial applied electric field is used to repel positive ions from traversing the tube and reaching the region of the vacuum. Electrons are collected in the vacuum region and disposed of using a Faraday cup. The repelled ions assist in creating a counter pressure to sweep neutral atoms out of the tube and back into the ambient air. As a result, a hollow tube can connect an evacuated volume to the open air without compromising the vacuum. This is a “windowless window.” An array of such tubes can be assembled together to increase the area of the aperture.

    Burnout protection for optical sensors
    33.
    发明授权
    Burnout protection for optical sensors 有权

    公开(公告)号：US10371570B2

    公开(公告)日：2019-08-06

    申请号：US15420438

    申请日：2017-01-31

    Applicant: RAYTHEON COMPANY

    Inventor： Catherine Trent ,  Gary A. Frazier

    IPC: G01J1/04 ,  G01J1/02 ,  G02F1/015 ,  G01J1/42 ,  G01J1/22 ,  G02B1/00 ,  G02F1/21 ,  G02B5/28

    Abstract: A method and apparatus for protecting an optical sensor is disclosed. A fixed filter having a fixed passband for light transmission is placed in front of the optical sensor. A programmable filter having a variable passband for light transmission is placed in front of the fixed filter. A controllable voltage source controls a voltage at the programmable filter that shifts the passband of the programmable filter from a first state in which the passband of the programmable filter is substantially the same as the passband of the fixed filter and a second state in which the passband of the programmable filter is different than the passband of the fixed filter.

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