Optics: measuring and testing – Shape or surface configuration – Triangulation
Reexamination Certificate
2006-07-11
2006-07-11
Rosenberger, Richard A. (Department: 2877)
Optics: measuring and testing
Shape or surface configuration
Triangulation
C356S606000
Reexamination Certificate
active
07075662
ABSTRACT:
A three-dimensional inspection system and method is used to obtain information about three-dimensional articles with specular surfaces having a shape and positive or negative height by projecting a pattern of light onto the articles at an oblique angle. The system includes a patterned light projector with optical axis disposed at an oblique angle with respect to the plane of the article being inspected, an extended light source, and an image detector disposed above the article to detect the image of the pattern on the article. The light pattern includes lines with a substantially equal thickness and spacing. The spacing of the lines is greater than a spacing or pitch of the specular elements. An image processor, coupled to the image detector, receives the image, locates the lines, and measures the lateral shift of the lines. Height information is determined from the lateral shift and projection angle using triangulation.
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Hallerman Gregory R.
Ludlow Jonathan E.
Stern Howard K.
Bourque & Assoc
Rosenberger Richard A.
Siemens Energy and Automation, Inc.
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