Optics: measuring and testing – Dimension – Width or diameter
Reexamination Certificate
2005-07-26
2005-07-26
Rosenberger, Richard A. (Department: 2877)
Optics: measuring and testing
Dimension
Width or diameter
Reexamination Certificate
active
06922254
ABSTRACT:
A method for measuring the diameter of an elongated article approximately circular in cross section, in particular of a wire or of a cable, which may include some or all of the following:illumination of the article with a fan-shaped beam of at least one monochromatic light source approximately point shaped in the measuring plane, wherein the main beam direction stands preferably perpendicular on the longitudinal axis of the articlereceiving the light on a single or multiple lined light-sensitive sensor on the oppositely lying side of the article, wherein the axis of the sensor stands preferably perpendicular on the main beam directionmeasuring the distance of the article to the sensor or the light sourcedetermining a value corresponding to the article diameter by evaluating the intensity patterns in the diffraction patterns at the edges of the shadow caused by the article, and of the measured diameterthe distance of the light source to the article or of the sensor to the article is selected such that the diffraction effect of oppositely lying edges of the article do not superimpose one another or only insignificantly superimpose one another in the plane of the sensor.
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“Application Note on Measuring the Diameter of Small Fibers,”Laser Focus, Sep. 1967.
Beining Adrian
Blohm Werner
Sikora Harald
Kilpatrick & Stockton LLP
Rosenberger Richard A.
Sikora Industrieelektronik GmbH
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