Optics: measuring and testing – By monitoring of webs or thread – For flaws or imperfections
Patent
1998-11-02
2000-04-25
Font, Frank G.
Optics: measuring and testing
By monitoring of webs or thread
For flaws or imperfections
250224, G01N 2184
Patent
active
060550597
ABSTRACT:
A system and a method for determining the density in which fibers are disposed along a planar surface employs a source of irradiance and a detector of irradiance in optical communication. A planar surface is positioned slightly below the optical path between the source and the detector. The fibers disposed along the planar surface interrupt the transmission of irradiance between the source and the detector. This interruption causes a decrease in the quantity of irradiance reaching the detector, resulting in a corresponding drop in the detector's output voltage. The density in which fibers are disposed along the planar surface can be determined by comparing the detector's voltage output with a pre-established baseline relating voltage output to fiber density.
REFERENCES:
patent: 3518441 (1970-06-01), Selgin
patent: 3730633 (1973-05-01), Kennedy
Brown Richard Tolan
Hales Ronald Frank
Lundgreen Robert Hales
Merx Brian Charles
Font Frank G.
Iomega Corporation
Nguyen Tu T.
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