公开(公告)号：US20250060319A1

公开(公告)日：2025-02-20

申请号：US18717860

申请日：2022-12-13

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Steven P. Floeder ,  Katherine E. Struthers ,  Taylor E. Hoensheid ,  Jeffrey P. Adolf

IPC: G01N21/89 ,  G01N21/88 ,  G01N21/892

Abstract: Systems and techniques are described for detecting surface profile defects within a moving web. An example system includes a conveyor configured to translate the web, along a downweb direction and at a translation speed, relative to an inspection area; a point light source configured to emit light, wherein the point light source is positioned and oriented relative to the conveyor to illuminate a portion of the web positioned within the inspection area; a diffusing screen positioned and oriented relative to the conveyor to receive the light reflected from the web as the web is translated through the inspection area; an image capture device configured to capture images of the diffusing screen; and a computing device configured to: identify, based on the images, a surface profile defect in a surface of web; and output data indicating a relative location of the defect within the web.