摘要 |
PROBLEM TO BE SOLVED: To provide a manufacturing method of an optical film roll in which an optical film original roll that includes a pattern and is in a long web state is slit at an adequate position with high accuracy.SOLUTION: In a system 1 in which an optical film roll is manufactured by slitting an optical film original roll 80 that includes a pattern and is in a long web state while transporting, and winding the obtained optical film that is in a long web state to a roll state, provided are an imaging part 41 which images a slit line which is an end surface in the longitudinal direction of the optical film under transportation and the pattern in the vicinity and an alignment part which adjusts the width direction position of a slit part 30 which slits the optical film original roll based on an imaging result obtained by the imaging part. |