Optics: measuring and testing – Shape or surface configuration
Reexamination Certificate
2008-03-20
2010-06-29
Chowdhury, Tarifur R. (Department: 2886)
Optics: measuring and testing
Shape or surface configuration
Reexamination Certificate
active
07746481
ABSTRACT:
A method of measuring and storing a center of rotation of a nozzle in a pick and place machine is provided. The method includes coupling an artifact to the nozzle. A substantially collimated laser beam is directed at the artifact, which is rotated while the collimated laser beam is energized. Edges of a shadow cast by the rotating artifact are detected and used to calculate error of a coordinate of the center of rotation of the nozzle. A coordinate of the center of rotation of the nozzle is calculated based upon a previous coordinate of the center of rotation and the error. The calculated coordinate of the center of rotation is stored for subsequent measurements.
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Dawson Matthew W.
Duquette David W.
Kranz David M.
Akanbi Isiaka O
Chowdhury Tarifur R.
Christenson Christopher R.
CyberOptics Corporation
Westman Champlin & Kelly P.A.
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