Optics: measuring and testing – By alignment in lateral direction – With light detector
Patent
1991-02-22
1994-01-11
Rosenberger, Richard A.
Optics: measuring and testing
By alignment in lateral direction
With light detector
G01B 1100
Patent
active
052786340
ABSTRACT:
A high speed high precision laser based alignment sensor system for use on surface mount component placement machines. A laser system is utilized to correctly align and position component parts which range between 0.02 inches and 2.0 inches in size. The laser sensor system consists of a laser light source which is passed through a collimating lens and then through an aperture to create a stripe of collimated laser light which is focused past the component being aligned to strike a multi-element CCD sensor array. The sensor system is mounted directly on the carrying mechanism for the surface mount component placement machine. During transit of the component between the bin of components and the circuit board upon which the component is to be placed, the component is rotated and the shadow which falls on the detector array is monitored. When the minimum width of shadow is detected, the correct angular orientation is determined, the average of the edges of the shadow when compared with the center of the quill determines the coordinate (X,Y) location of the component on the quill. Two alignments normally occur displaced by 90.degree.. Thereafter, the sensor sends correcting signals to the component placement machine to assure the correct angular orientation and the correct X,Y position for the component to be placed on the circuit board by the component placement machine.
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Christian Brozinski, "SMD-Automatic from Europeans for Europeans".
Bocchi Curtis J.
Case Steven K.
Skunes Timothy A.
CyberOptics Corporation
Hantis K. P.
Rosenberger Richard A.
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