OPTICAL INTENSITY METHOD TO MEASURE THE THICKNESS OF COATINGS DEPOSITED ON SUBSTRATES

    公开(公告)号:US20210025693A1

    公开(公告)日:2021-01-28

    申请号:US16998219

    申请日:2020-08-20

    Applicant: Arkema Inc.

    Abstract: Methods and apparatus for measuring a thickness of a coating on an moving object are provided. Light is directed toward the object at a predetermined location on the object such that a portion of the light interacts with the object. A 1D and/or 2D maximum intensities for at least one wavelength channel is captured that is produced by the portion of the light interacting with the object. A measured average intensity of the wavelength channel and/or intensities and their arithmetic derivatives of multi wavelength channel geometries is converted into 1D (averaged) and/or 2D thickness values. Based on these values an acceptability of the coating is evaluated and thickness calculated.

    Optical intensity method to measure the thickness of coatings deposited on substrates

    公开(公告)号:US11125549B2

    公开(公告)日:2021-09-21

    申请号:US16998219

    申请日:2020-08-20

    Applicant: Arkema Inc.

    Abstract: Methods and apparatus for measuring a thickness of a coating on an moving object are provided. Light is directed toward the object at a predetermined location on the object such that a portion of the light interacts with the object. A 1D and/or 2D maximum intensities for at least one wavelength channel is captured that is produced by the portion of the light interacting with the object. A measured average intensity of the wavelength channel and/or intensities and their arithmetic derivatives of multi wavelength channel geometries is converted into 1D (averaged) and/or 2D thickness values. Based on these values an acceptability of the coating is evaluated and thickness calculated.

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