| 摘要 |
PROBLEM TO BE SOLVED: To provide a resin film roll shape measurement method and a measurement apparatus, capable of avoiding problems such as formation of scratches, folding creases or adhesion of a foreign substance to a film surface, and also avoiding such inaccuracy in a measurement result as occurring at a non-contact method.SOLUTION: In a resin film roll shape measurement method, a gas is locally sprayed from a gas spray nozzle onto a measurement point on a surface of a resin film roll to obtain a state eliminating a lift of a surface layer film at the measurement point, and at the same time a non-contact type displacement sensor scans in a film width direction so as to measure a surface displacement.SELECTED DRAWING: Figure 1 |
