| 摘要 |
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
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