Radiant energy – Photocells; circuits and apparatus – With circuit for evaluating a web – strand – strip – or sheet
Patent
1995-06-07
1997-02-04
Allen, Stephone
Radiant energy
Photocells; circuits and apparatus
With circuit for evaluating a web, strand, strip, or sheet
2505593, 25055931, 2505594, 356376, G01N 2186
Patent
active
056001509
ABSTRACT:
Methods and arrangements are provided to efficiently use 3-D vision systems to measure selected features, of objects that are semi-constrained in compartmented trays having a uniform geometric arrangement. The methods are particularly well suited for optimizing the 3-D measurement of leads on integrated circuit devices which are packaged in trays. For obtaining the three-dimensional data, a multi-pocketed tray can be provided with tray pockets arranged in rows and columns, and corresponding sides of the multiple parts or devices in a row or column are scanned sequentially with at least one three dimensional sensor. This scanning procedure is repeated for all rows and columns containing sides of the devices from which data is to be obtained. The devices can be first aligned by applying directional vibration to the tray to drive all the parts or devices to the same corner or side of the respective pockets. The collected device geometry data is fed back to the manufacturing operation to control the parameters thereof.
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Mauro Alex
Stern Howard
Yonescu William E.
Allen Stephone
Robotic Vision Systems Inc.
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