TRANSFORMER LIFETIME EVALUATION APPARATUS AND METHOD

    公开(公告)号:US20240077415A1

    公开(公告)日:2024-03-07

    申请号:US18272421

    申请日:2021-12-22

    发明人: Jae-Hun YOON

    IPC分类号: G01N21/33 G01N21/41

    摘要: A transformer lifetime evaluation apparatus comprises a first storage part for storing insulation oil used for insulation of a transformer; a second storage part provided to be separated from the first storage part and storing insulation oil which is not used for the insulation of the transformer; a light-emitting unit for emitting light of a specified wavelength; a light-receiving unit for receiving light emitted from the light-emitting unit; a first optical cable connecting the light-emitting unit and the light-receiving unit, providing a moving path of light emitted from the light-emitting unit and received in the light-receiving unit; a second optical cable connecting the light-emitting unit and the light-receiving unit, providing a moving path of light emitted from the light-emitting unit and received in the light-receiving unit; and a calculation part connected to the light-receiving unit and receiving information about an optical property of methanol from the light-receiving unit.

    Temperature measurement system and temperature measurement method

    公开(公告)号:US11668608B2

    公开(公告)日:2023-06-06

    申请号:US17063816

    申请日:2020-10-06

    发明人: Tong Wu Kenji Nagai

    摘要: A temperature measurement system configured to measure a temperature of a target object having a first main surface and a second main surface includes a light source unit configured to emit output light penetrating the target object and including a first wavelength range and a second wavelength range; a measurement unit configured to measure a spectrum of reflected light; an optical path length ratio calculator configured to calculate an optical path length ratio between the output light of the first wavelength range and the output light of the second wavelength range; and a temperature calculator configured to calculate the temperature of the target object based on the optical path length ratio and a previously investigated relationship between the temperature of the target object and a refractive index ratio between the output light of the first wavelength range and the output light of the second wavelength range.

    Cell imaging systems and methods
    6.
    发明授权

    公开(公告)号:US11650149B2

    公开(公告)日:2023-05-16

    申请号:US17040647

    申请日:2019-03-26

    摘要: Disclosed herein are systems and methods for imaging cells. Quantitative phase imaging uses variations in the index of refraction of a sample as a source of endogenous contrast, providing label-free information of sub-cellular structures and allowing for the reconstruction of valuable biophysical parameters, such as cell dry-mass at femtogram scales, mass transport, and sample thickness and fluctuations at nanometer scales. As a result, QPI has become a valuable tool in biology and medicine. However, QPI has suffered from the need for trans-illumination through relatively thin objects in order to gain access to the forward-scattered field, which carries crucial low spatial frequency information of a sample and avoid contributions from multiple scattered light or out-of-focus planes. The disclosed methods and systems can provide for reconstruction of QPI and corresponding analysis for imaging samples of cells in thick samples using an epi-illumination configuration.