If second step measuring device, and if first step measurement method

摘要

PROBLEM TO BE SOLVED: To provide a boundary step difference measurement apparatus for measuring a boundary step difference in a bottle mouth part of a glass bottle in a short time.;SOLUTION: A boundary step difference measurement apparatus 100 for measuring a step difference in a boundary 5 in a bottle mouth part 4 of a glass bottle 2 includes: a light emitting part 10 which emits light; a first light-shielding plate 30 arranged with a gap 104 from the bottle mouth part 4; an imaging part 40 which images the bottle mouth part 4 from above; and an image processing part 50 which generates an image of the bottle mouth part 4 including the boundary 5, on the basis of information on the image captured by the imaging part 40. The first light-shielding plate 30 and the gap 104 are irradiated with the light emitted from the light emitting part 10. The bottle mouth part 4 is irradiated with light diffracted by the first light-shielding plate 30 and the gap 104. The imaging part 40 images the bottle mouth part 4 irradiated with the diffracted light.;COPYRIGHT: (C)2015,JPO&INPIT