| 摘要 |
PROBLEM TO BE SOLVED: To allow easy and accurate detection of edge positions of a light-transmissive member being transported and to allow the improvement of installation layout performance.SOLUTION: An edge position detection device 10 includes: a light projection mechanism 26 which irradiates a transparent web 14 being transported, with inspection light to propagate the inspection light along the inside of the transparent web 14; a light receiving mechanism 28 which is disposed on the outside of an irradiation area S directly irradiated with the inspection light from the light projection mechanism 26 and detects scattering light of the inspection light propagated in the transparent web 14 and scattering to the outside from an edge part 14e of the transparent web 14; and an edge position detection circuit 30 which detects the position of the edge part 14e of the transparent web 14 on the basis of the detected scattering light. |
