Optical inspection method and apparatus
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United States of America Patent
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Apr 6, 1999
Grant Date -
N/A
app pub date -
Apr 16, 1997
filing date -
Jul 16, 1996
priority date (Note) -
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Abstract
This invention discloses an apparatus for optically inspecting an object having upper and lower faces for indicating the condition of the object, including a lighting system periodically reflecting a beam of light from one face of the object to produce a series of short-duration time-spaced reflected beams, and periodically transmitting a beam of light through both faces of the object to produce a series of short-duration time-spaced transmitted beams time-interlaced with the reflected beams, a sensor sensing the short-duration time-spaced reflected beams and transmitted beams, and generating electrical outputs corresponding thereto, and a processor receiving the electrical outputs and processing them to provide an indication of the condition of the object. A method of optically inspecting an object having upper and lower faces for indicating the condition of the object is also described.
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