Cylindrical body inspection apparatus utilizing displacement information and reflected light information
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United States of America Patent
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Jul 29, 1997
Grant Date -
N/A
app pub date -
Jun 6, 1995
filing date -
Jun 28, 1994
priority date (Note) -
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Abstract
The present invention relates to a cylindrical body inspection apparatus characterized in comprising: a) rotating mechanism for supporting and rotating a cylindrical body; b) sensor comprising a light emitting unit for irradiating light onto a surface to be inspected of a cylindrical body, and a light detecting unit for detecting incoming light reflected from the surface to be inspected; this sensor detects displacement information corresponding to a displacement of distance from the surface to be inspected to the light detecting unit, and information regarding the quantity of incoming light corresponding to quantity of reflected light from the surface to be inspected; c) computing unit for computing surface information and external form formation based on the above displacement information and information regarding quantity of incoming light from the sensor; and d) discriminating unit for discriminating the presence or absence of defects relating to shape of the cylindrical body based on the surface information and external form information obtained by means of the computing unit.
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