Optics: measuring and testing – By monitoring of webs or thread
Patent
1991-10-04
1993-09-07
McGraw, Vincent P.
Optics: measuring and testing
By monitoring of webs or thread
356430, 356431, 250572, 359599, 359853, 362317, 362325, 362326, G01N 2184
Patent
active
052434028
ABSTRACT:
The invention relates to an optical inspection apparatus comprising an illuminating means which has a linear light source (11) and a concave cylindrical mirror (10) which forms an image of the light source (11), with the cylindrical axis of the cylindrical mirror extending essentially parallel to the light source (11) in order to generate an illuminated strip (31) on a web (12) to be monitored, with the illuminated strip preferably extending over the entire width of the web (12). By means of an optical system (24) a light receiving means forms an image of an inspection line (32) extending on the material web (12) at the center of the illuminated strip (31) on a row-like photoreceiver arrangement (25), so that light emerging from the material web (12) is detected. The photoreceiver arrangement (25) is connected to an electronic processing circuit (26). The cylindrical mirror (10) which forms an image of the linear light source (11) has circumferentially extending grooves (17) arranged alongside one another in the cylindrical surface.
REFERENCES:
patent: 3645601 (1972-02-01), Doctoroff et al.
patent: 4529318 (1985-06-01), Curl
patent: 4810095 (1989-03-01), Kawauchi et al.
patent: 4890924 (1990-01-01), Beckstein
patent: 4900153 (1990-02-01), Weber
patent: 5047652 (1991-09-01), Lisnyansky et al.
Siersch Wolfgang
Weber Klaus
Erwin Sick GmbH - Optik-Elektronik
Keesee LaCharles
McGraw Vincent P.
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