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    High efficiency and high sensitivity particle capture type terahertz sensing system
    1.
    发明授权
    High efficiency and high sensitivity particle capture type terahertz sensing system 有权

    公开(公告)号：US11703442B2

    公开(公告)日：2023-07-18

    申请号：US17138919

    申请日：2020-12-31

    Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

    Inventor： Minah Seo ,  Yong-Sang Ryu ,  Eui-Sang Yu ,  Taikjin Lee ,  Hyun Seok Song

    IPC: G01N21/3581 ,  G01N15/14

    CPC classification number: G01N15/1434 ,  G01N15/1404 ,  G01N2015/1415

    Abstract: Provided is a high efficiency and high sensitivity particle capture type terahertz sensing system. The particle capture type terahertz sensing system includes a sensing substrate to capture particles, and a terahertz sensor to emit terahertz electromagnetic waves to the sensing substrate to sense the particles, wherein the sensing substrate includes a base substrate and a particle capture structure layer formed on the base substrate, the particle capture structure layer includes a plurality of slits for focusing the terahertz electromagnetic waves, the particle capture structure layer captures the particles in the plurality of slits using dielectrophoresis, and an area in which the terahertz electromagnetic waves converge to the plurality of slits matches an area in which the particles are captured in the plurality of slits through the dielectrophoresis.

    Slam method and apparatus robust to wireless environment change
    3.
    发明授权
    Slam method and apparatus robust to wireless environment change 有权

    公开(公告)号：US11275163B2

    公开(公告)日：2022-03-15

    申请号：US16477311

    申请日：2017-12-28

    Applicant: Korea Institute of Science and Technology

    Inventor： Taikjin Lee ,  Youngmin Jhon ,  Jaehun Kim ,  Minah Seo ,  Beomju Shin

    IPC: G01S11/06 ,  G01S5/02

    Abstract: The present invention relates to SLAM (simultaneous localization and mapping) method and apparatus robust to a wireless environment change. A relative position of a moving node is estimated based on motion sensing of the moving node, the relative position of the moving node is corrected based on a comparison between a change pattern of at least one signal strength received over a plurality of time points and a signal strength distribution in a region in which the moving node is located, a route of the region is represented by using the relative position corrected as described above, and thereby, it is possible accurately estimate a position of the moving node and to create a map in which very accurate route information is recorded throughout the entire region at the same time, even if a wireless environment change such as signal interference between communication channels, expansion of an access point, and occurrence of a failure or an obstacle is made or a poor wireless environment such as lack of the number of access points occurs.

    Optical imaging apparatus using metamaterial and optical imaging method using metamaterial
    9.
    发明授权
    Optical imaging apparatus using metamaterial and optical imaging method using metamaterial 有权

    公开(公告)号：US11175186B2

    公开(公告)日：2021-11-16

    申请号：US16809275

    申请日：2020-03-04

    Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY ,  Center for Advanced Meta-Materials

    Inventor： Minah Seo ,  Sang-Hun Lee ,  Chulki Kim ,  Jae Hun Kim ,  Taikjin Lee ,  Deok Ha Woo

    IPC: G01J5/08 ,  G02B1/00 ,  G01J5/00

    Abstract: One embodiment of the present invention provides an optical imaging apparatus using a metamaterial including a metamaterial array sensor which includes a plurality of unit cells made of a metamaterial and is positioned adjacent to an observation object, an imaging beam providing unit which provides an imaging beam toward the metamaterial array sensor, a control beam providing unit which controls a control beam provided to the unit cell to block the imaging beam incident on the unit cell, and an imaging beam measuring unit which measures a unit cell imaging beam transmission amount passing through the unit cell by measuring an imaging beam transmission amount of the metamaterial array sensor when the imaging beam passes through the unit cell and an imaging beam transmission amount of the metamaterial array sensor when the control beam is focused on the unit cell to block the imaging beam incident on the unit cell.

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