Optics: measuring and testing – By configuration comparison – With photosensitive film or plate
Patent
1996-03-04
1997-03-25
Epps, Georgia Y.
Optics: measuring and testing
By configuration comparison
With photosensitive film or plate
356372, 356394, 25022714, G01B 1102
Patent
active
056150121
ABSTRACT:
A method of detecting whether a vacuum nozzle on a high speed component placement machine is obstructed. A vacuum nozzle (10) has a hollow tube with a vacuum port (25) and an opening (12) at one end. The hollow tube having a fiber optic wire (20) located within it such that one end of the fiber optic wire is exposed to be illuminated (50) by a remote light source (30). The fiber optic wire transmits light to illuminate the opening from the interior of the vacuum nozzle. The amount of light exiting the illuminated opening is measured (55) by a remotely located light detector (35). A decision (60) is made as to whether the opening is obstructed by comparing the measured illuminated opening to a predetermined standard.
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patent: 4459743 (1984-07-01), Watanabe et al.
patent: 4770529 (1988-09-01), Levinson et al.
patent: 4882497 (1989-11-01), Inoue et al.
patent: 5079433 (1992-01-01), Smith
Holmes Sterling T.
Kazem-Goudarzi Vahid
Marron Alex
Dorinski Dale W.
Epps Georgia Y.
Motorola Inc.
Ratliff Reginald A.
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