Method and system for visualizing surface errors

Details Method and system for visualizing surface errors Method and system for visualizing surface errors

2008-05-13

2008-05-13

Lauchman, Layla G. (Department: 2877)

Optics: measuring and testing

Inspection of flaws or impurities

Surface condition

C356S601000

Reexamination Certificate

active

07372558

ABSTRACT:
A method and system for visualizing deviations on an actual surface10, 30from a nominal, or designed, surface28utilizes a system and method for mapping the spatial (e.g. x, y and z) coordinates of the actual surface10, 30into a computer13, comparing the mapped actual surface to the nominal surface28to produce a three-dimensional distribution of deviation values (D), processing this distribution into a topographical pattern34of multiple contours or areas34a. . . 34n, each contour or area having the same, or generally the same, deviation value (D), and optically projecting this topographical pattern34onto the actual surface10, 30in registry with the initial surface mapping to provide a display of the surface deviations (D) directly on the actual surface10, 30. The deviations are measured along a direction D normal to the actual surface so that the three-dimensional distribution is given in x, y, D coordinates. The optical projection is preferably a laser projection38. The mapping and projection onto the actual surface10, 30are made, and coordinated with one another, with respect to three reference points32on the surface10, 30.

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