US 4,731,649 A · Oblique illumination for video rim inspection

Abstract

An illumination system for video inspection of transparent and translucent bodies to be inspected sequentially while moving along a conveying path has a light source and light-transmitting block partly enclosing over the end of the bodies moving on the path. A light source, especially one or more strobe lamps is located along the conveying path, and light from the source is directed inwardly by the block to a diffuse surface defining side walls of a channel through which rims move along the conveying path. The diffuse side walls direct light inwardly and obliquely of the rim. The rim can be illuminated on the fore and aft sides in the channel by light emission from an additional block of material forming a connection web between the inwardly-reflective blocks, tending to evenly illuminate the rim.

Claims9

Dependent claims

An inspection system for examining an end of transparent and translucent bodies, each of the bodies to be inspected while progressing along a conveying path, the system comprising:

a video analyzer directed axially toward the end and being operable to record an instantaneous image of the end and to discriminate between good and bad ends by detecting effects therein;
at least one light source for illuminating the end;
and,
a block of light-transmitting material illuminated by the light source, the block defining sidewalls reaching over the end of the body to partly surround the end of the body as the body is moved along the conveying path, the block having a diffuse, light-transmissive surface, and light being directed inwardly from the block toward the end and obliquely toward said end and toward the video analyzer.

1 more element

Dependencies are inferred from the claim text.

Oblique illumination for video rim inspection

Life of this patent

Oblique illumination for video rim inspection

Life of this patent

Abstract

Claims9