| 摘要 |
Inspecting the sealing of a blister package 10 having one or more pockets 12 with a peripheral sealing area 20 around the or each pocket, wherein radiation from a light source 16a, 16b is directed at the peripheral sealing area 20 at an angle of less than 90{ to the peripheral sealing area. Any reduction in reflected radiation due to a shadow of an anomaly is detected by a detector 18 and an image processor determines the acceptability of the blister package based on the pattern of shadowing detected. The anomaly may be a region of weak or faulty sealing or a bubble, ridge, ruck or bump. The radiation may comprise coherent, visible light from a laser. |
