Patent ID: 9068904
Filing Date: 2015-06-30
Classification: G01B,G01M

Abstract:
1. A non-contact metrology system to measure a surface, comprising: a display positioned proximate a first side of the surface to be measured; a pattern generator configured to generate a pattern for display on the display, the pattern having a plurality of spot targets being arranged in two dimensions with each of the plurality of targets being separated from others of the plurality of targets in a first dimension and each of the plurality of targets being separated from others of the plurality of targets in a second dimension orthogonal to the first dimension; an imaging device positioned to detect at least a portion of the plurality of targets after interaction with the surface and to generate an electronic image thereof; an image analyzer configured to analyze the electronic image to determine if the plurality of targets in the electronic image are in expected locations in each of the two dimensions following interaction with the surface wherein the pattern generator is configured to generate the plurality of targets in an irregularly-spaced display pattern; and wherein the expected locations of the plurality of targets are in a regularly-spaced display pattern based on a location of the display with respect to the surface, a location of the imaging device with respect to the surface, and a shape of the surface.