Device for detecting diffusely scattered impurities in...

G - Physics – 01 – N

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G01N 21/90 (2006.01) G01N 21/51 (2006.01)

Patent

CA 2283519

The device for the detection of diffusely scattering impurities (18) in containers (10) that have a transparent wall (16) has a light source (12), which produces one or more light beams (14) for illuminating the wall (16), and an optical detecting device (22) for production of an image of the illuminated wall (16), with the light source (12) and the optical detecting device (22) arranged according to dark-field detection. The light source (12) is designed so that the light beam or beams (14) that it emits have an intensity distribution over their cross-section with an intensity contrast at least at one point within their cross-section.

L'invention concerne un dispositif pour détecter des impuretés (18) à dispersion diffuse dans des récipients (10) possédant une paroi transparente (16). Ce dispositif comporte une source lumineuse (12) produisant un ou plusieurs faisceaux lumineux (14) pour éclairer la paroi (16), et un système de détection optique (22) pour produire une image de la paroi éclairée (16), la source lumineuse (12) et le système de détection optique (22) étant disposés conformément à une détection sur fond noir. La source lumineuse (12) se présente de telle manière que le ou les faisceaux lumineux (14) qu'elle émet présentent sur leur section transversale une répartition d'intensité avec un contraste d'intensité en au moins un point à l'intérieur de leur section.

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