Device for illuminating a test region of a bottle

Details Device for illuminating a test region of a bottle Device for illuminating a test region of a bottle

G - Physics

01

N

G01N 21/90 (2006.01) B07C 5/34 (2006.01) G01N 33/00 (2006.01)

Patent

CA 2048680

ABSTRACT OF THE DISCLOSURE: An illuminating device (10) has a wall (18) in which an open slit (20) is formed. Powerful rod-shaped light source (26) parallel to the longitudinal axis of the bottle are arranged behind the slit (20) on a semi-ellipse the center of which coincides with the centre of an inspection region. A line camera (42) takes narrow vertical photos of the threaded region of the bottle (34), which is rotatable about its longitudinal axis throughout the test. The light source arrangement provides high- contrast illumination of the bottle (34) in the inspection region, because the ratio of the quantity of light which enters the glass laterally to the quantity of transmitted light which enters the glass is high. The high-contrast illumination permits reliable detection of internal and external defects in the threaded neck region of the bottle (34).

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