| 摘要 |
#CMT# #/CMT# The method involves driving a light source (3) e.g. organic LED, by using a driving unit (9) such that the light source successively produces two types of light, where one type of light being homogeneous light, and other type of light is formed of dark zones and clear zones alternated with a discontinuous spatial variation. An image of a transparent or translucent object (2) is captured in moving when the object is lighted successively by the types of light. The image captured with the types of light is analyzed to respectively detect high contrast defects and low contrast defects. #CMT# : #/CMT# An independent claim is also included for a device for inspecting a transparent or translucent object. #CMT#USE : #/CMT# Method for optically inspecting a transparent or translucent object such as container e.g. bottle, vial or jar, in glass or plastic material, for detecting defects e.g. non-transparent material inclusion, air bubble, surface ply, thickness variation, dirt or surface disturbance, in the object. #CMT#ADVANTAGE : #/CMT# The method permits to correctly detect the high contrast defects and the low contrast defects appearing in the transparent or translucent object in a cost effective manner. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a schematic view of an optical inspection device in line. 1 : Optical inspection device 2 : Transparent or translucent object 3 : Light source 5 : Camera 6 : Image processing unit 9 : Driving unit. |
