公开(公告)号：US11327010B2

公开(公告)日：2022-05-10

申请号：US16965632

申请日：2019-01-28

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Joseph R. Nesbitt ,  Steven P. Floeder ,  Michael L. Ruegsegger ,  Crystal A. Dehn ,  Arthur L. Kotz

IPC: G01N21/3563 ,  G01N21/359 ,  G01N21/86 ,  G01N21/88

Abstract: System and technique for inspecting a moving film by measuring the levels of light transmission through a thickness dimension of the film are described. The system includes a light source configured to provide light including a particular wavelength, or a particular range of wavelengths. The light from the light source is directed toward a first surface of the film, and an image capturing device is located adjacent to the light source on a second side of the film opposite the first surface, the image capturing device configured to measure the levels of light intensity exiting a second surface of the film. Measurements of the level of the light intensity passing through the film may be spatially synchronized to physical positions along the film to generated at least one roll map indicative of light transmission characteristics of the film over the imaged portions of the film.

公开(公告)号：US20210041355A1

公开(公告)日：2021-02-11

申请号：US16965632

申请日：2019-01-28

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Joseph R. Nesbitt ,  Steven P. Floeder ,  Michael L. Ruegsegger ,  Crystal A. Dehn ,  Arthur L. Kotz

IPC: G01N21/3563 ,  G01N21/359 ,  G01N21/86 ,  G01N21/88

Abstract: System and technique for inspecting a moving film by measuring the levels of light transmission through a thickness dimension of the film are described. The system includes a light source configured to provide light including a particular wavelength, or a particular range of wavelengths. The light from the light source is directed toward a first surface of the film, and an image capturing device is located adjacent to the light source on a second side of the film opposite the first surface, the image capturing device configured to measure the levels of light intensity exiting a second surface of the film. Measurements of the level of the light intensity passing through the film may be spatially synchronized to physical positions along the film to generated at least one roll map indicative of light transmission characteristics of the film over the imaged portions of the film.