公开(公告)号：US12092585B2

公开(公告)日：2024-09-17

申请号：US17768151

申请日：2020-11-04

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Jason P. Smith ,  Steven P. Floeder

IPC: G01N21/89 ,  G01N21/64 ,  G01N35/10

CPC classification number: G01N21/8901 ,  G01N21/6428 ,  G01N21/6456 ,  G01N35/10

Abstract: Techniques are described for automatically detecting defects in webs using ultraviolet light to excite fluorescing agents in various layers of the web. In one example. a system for detecting defects in the web includes an inspection device and a processing unit. The inspection device includes a lighting unit, a filter, and an image capture device. The lighting unit is configured to emit ultraviolet light having a first wavelength to the web, the web including a fluorescing agent configured to emit light having a second wavelength upon excitation by the ultraviolet light. The image capture device is configured to capture one or more images of the light having the second wavelength after the light has passed through the filter. The processing unit is configured to determine whether the web includes a defect based on the one or more images.

公开(公告)号：US20240094139A1

公开(公告)日：2024-03-21

申请号：US17768151

申请日：2020-11-04

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Jason P. Smith ,  Steven P. Floeder

IPC: G01N21/89 ,  G01N21/64 ,  G01N35/10

CPC classification number: G01N21/8901 ,  G01N21/6428 ,  G01N21/6456 ,  G01N35/10

Abstract: Techniques are described for automatically detecting defects in webs using ultraviolet light to excite fluorescing agents in various layers of the web. In one example. a system for detecting defects in the web includes an inspection device and a processing unit. The inspection device includes a lighting unit, a filter, and an image capture device. The lighting unit is configured to emit ultraviolet light having a first wavelength to the web, the web including a fluorescing agent configured to emit light having a second wavelength upon excitation by the ultraviolet light. The image capture device is configured to capture one or more images of the light having the second wavelength after the light has passed through the filter. The processing unit is configured to determine whether the web includes a defect based on the one or more images.