Optical inspection of container dimensional parameters using a t

Details Optical inspection of container dimensional parameters using a t Optical inspection of container dimensional parameters using a t

1994-04-07

1995-10-24

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

356240, G01N 2100, G01N 2190

Patent

active

054612284

ABSTRACT:
Apparatus for inspecting the inside diameter of a container mouth that includes a light source for directing light energy into the container, and a light sensor disposed with respect to the source and the container to receive light energy transmitted out of the container through the mouth. A telecentric lens directs onto the light sensor light energy transmitted through the container mouth substantially axially of the container mouth. The light energy is focused through an iris onto a matrix array sensor, which develops a two-dimensional image of the container mouth. The matrix array sensor is coupled to image processing electronics for determining or calculating a circle of greatest diameter that will fit within the two-dimensional image of the container mouth, and treating such circle as indicative of the effective diameter of the container mouth.

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