Optics: measuring and testing – Inspection of flaws or impurities – Having predetermined light transmission regions
Patent
1985-08-01
1987-02-10
Willis, Davis L.
Optics: measuring and testing
Inspection of flaws or impurities
Having predetermined light transmission regions
356239, 250560, G01N 2188
Patent
active
046419667
ABSTRACT:
An automated inspection system is described utilizing a plurality of laser beams which contact the bottom edge of the object being inspected to detect various flaws or defects which may exist in said bottom surface. Said laser beam patterns are further compared with the laser beam patterns obtained from another object of the same type and known to be without defects in order to determine both defect depth and type defect. Objects being inspected are moved passed a detection station utilizing a flat horizontal surface containing a pair of slots aligned generally perpendicular with respect to each other and with the laser beams projecting in opposite directions along the length of each slot and further aligned at a slight angle from said horizontal surface in order to contact the bottom edge of said moving object, and with photodetection means being positioned to intercept each of the projected laser beams after contact with the moving object.
REFERENCES:
patent: 3676008 (1972-07-01), West et al.
Brussee Warren T.
Lemmers Robert E.
Safran Frank
General Electric Company
Jacob Fred
McDevitt J. F.
Schlamp Philip L.
Turner S. A.
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