Systems and methods for illuminating objects for vision systems
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United States of America Patent
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Nov 10, 1987
Grant Date -
N/A
app pub date -
Nov 15, 1985
filing date -
Nov 15, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An illumination system, particularly suitable for use with automatic vision systems employing an image sensing device or system, illuminates an object under analysis with the cone of light that may cover 360.degree. or only an arc segment about a part of the object under analysis. Light from a ring source is directed toward a curved parabolic surface on a light collector ring that substantially collimates the light and fans it out radially out toward a toroidal reflector surface on an encompassing ring, the relative position of which determines the angle of incidence of a cone of light formed to fall in the region of the object, so as to illuminate particular features with optimal efficiency. To change the angle of incidence while maintaining focus, a differential drive mechanism moves the parabolic collector ring and the toroidal angle generator ring in differential fashion concurrently.
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