CALIBRATING SEPARATELY LOCATED CAMERAS WITH A DOUBLE SIDED VISIBLE CALIBRATION TARGET FOR IC DEVICE TESTING HANDLERS
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United States of America Patent
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Issued Date -
Jan 13, 2011
app pub date -
Jul 7, 2009
filing date -
Jul 7, 2009
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A camera coordinate calibration system and method are provided. The system includes a calibration contactor having at least two fiducials. The system also includes a double sided visible calibration target. A pick and place handler is provided with a device holder having at least two fiducials, where the device holder is configured to pickup the double sided visible calibration target and place the target onto the calibration contactor. The system includes a device view camera configured to image a first side of the double sided visible calibration target inserted into the device holder, and a contactor view camera configured to image a second side of the target inserted into the calibration contactor. A processor is provided that calculates a common coordinate system for the device view camera and the contactor view camera based on the images of the first and second sides of the double sided visible calibration target.
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