System and method for expansion of field of view in a vision system
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United States of America Patent
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Feb 11, 2014
Grant Date -
Aug 8, 2013
app pub date -
Feb 6, 2012
filing date -
Feb 6, 2012
priority date (Note) -
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status (Latency Note)
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Abstract
This invention provides a system and method for expanding the field of view of a vision system camera assembly such that the field of view is generally free of loss of normal resolution across the entire expanded field. A field of view expander includes outer mirrors that receive light from different portions of a scene. The outer mirrors direct light to tilted inner mirrors of a beam splitter that directs the light aligned with a camera axis to avoid image distortion. The inner mirrors each direct the light from each outer mirror into a strip on the sensor, and the system searches features. The adjacent fields of view include overlap regions sized and arranged to ensure a centralized feature appears fully in at least one strip. Alternatively, a moving mirror changes position between acquired image frames so that a full width of the scene is imaged in successive frames.
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Cited Art Landscape
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