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1. (CA2045606) INSPECTION DEVICE ON THE BASIS OF DARK FIELD ILLUMINATION

Office : Canada
Application Number: 2045606 Application Date: 14.12.1990
Publication Number: 2045606 Publication Date: 15.06.1992
Publication Kind : A1
Prior PCT appl.: Application Number:EP1990002008 ; Publication Number: Click to see the data
IPC:
G01N 21/84
G PHYSICS
01
MEASURING; TESTING
N
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
21
Investigating or analysing materials by the use of optical means, i.e. using infra-red, visible, or ultra-violet light
84
Systems specially adapted for particular applications
CPC:
G01N 21/84
Applicants:
Inventors: NUNNINK, LAURENS
Priority Data:
Title: (EN) INSPECTION DEVICE ON THE BASIS OF DARK FIELD ILLUMINATION
(FR) DISPOSITIF D'INSPECTION A ECLAIRAGE FOND NOIR
Abstract: front page image
(EN) 1 Dunkelfeldbeirchtung PCT PCT/EP90/02008 HEUFT-QUALIPLUS B.V. INSPECTION DEVICE ON THE BASIS OF DARK FIELD ILLUMINATION A b s t r a c t A Device for inspecting with dark field illumination objects with at least one transparent portion, for instance glass bottles (3) is disclosed. The device comprises illuminating means (1); positioning means for placing the object such that that object can be illuminated by the illuminating means; a video camera (6) for sensing that object and generating video signals, which illuminating means (1) and which video camera (6) are disposed relative to the positioning means such that the video camera (6) senses no image in the case of a homogeneous transparent portion of an object without unhomogeneous parts, enclosures, bubbles, dirt or other deviations, and imaging means such as at least one positive lens (2) and/or at least one positive mirror (7) which are placed between the illuminating means (1) and the positioning means and which image the illuminating means (1) in the vicinity of the objective (5) of the video camera. Fig. 1


Also published as:
JPH05503154WO/1992/010741