Optics: measuring and testing – By polarized light examination – With light attenuation
Patent
1991-10-15
1992-12-29
Evans, F. L.
Optics: measuring and testing
By polarized light examination
With light attenuation
250237G, G01B 1124
Patent
active
051756013
ABSTRACT:
This invention relates to an apparatus and method for 3-D vision sensing or measurement to rapidly collect X-Y-Z surface data to support dimensional measurement, surface inspection and Reverse-CAD functions. The high-speed three-dimensional surface measurement system for use in determining the surface of an object from at least two electronic signals, has at least a first source for illuminating at least a surface area of the object with at least one fringe pattern. At least two cameras are provided for receiving reflected illumination from the surface area, each of the at least two cameras have a predetermined spacial orientation relative to the source for illuminating, a primary camera of the two cameras having a line-of-sight that forms a primary angle relative to a line-of-sight of the source for illuminating and a secondary camera of the two cameras having a line-of-sight that forms a secondary angle relative to the line-of-sight of the source for illuminating, the secondary angle being different than the primary angle. The primary camera provides a primary electronic signal representative of reflected illumination received thereby and the secondary camera providing a secondary electronic signal representative of reflected illumination received thereby.
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Electro-Optical Information Systems
Evans F. L.
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