Optics: measuring and testing – By monitoring of webs or thread – For flaws or imperfections
Patent
1990-09-10
1992-06-02
Rosenberger, Richard A.
Optics: measuring and testing
By monitoring of webs or thread
For flaws or imperfections
250572, G01N 2155, G01N 2189
Patent
active
051181959
ABSTRACT:
The invention features a real time system for detecting streaks or scratches which occur substantially parallel to the direction of motion of a continuous web of material. The system can also be used to inspect sheets of material that may have been cut from such webs. An energy source such as an incandescent lamp or a bank of lamps generates electromagnetic energy that impinges upon the continuous web of material. CCD cameras receive reflected specular radiation from the web and generate video signals. The CCD cameras are disposed opposite the energy source and within 5.degree. of the plane perpendicular to the continuous web plane. Alternatively, the energy sources may transmit energy through the web material, which energy can be received by the CCD cameras. A processor is connected to the CCD cameras to process the video signals and to generate an enhanced signal-to-noise ratio signal that represents a streak or scratch on the web.
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patent: 4779005 (1988-10-01), Arnold
RKB Opto-Electrics, Inc.
Rosenberger Richard A.
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