Patent ID: 7869061
Filing Date: 2011-01-11
Classification: G01B,G01M,G01N,G06T

Abstract:
1. A device for measuring a surface distortion on a specular surface or a semi-specular surface, comprising: pattern displaying means capable of switching and displaying a plurality of kinds of light-and-shade patterns using a plurality of kinds of stripe array patterns used for a binary-coded pattern projection method and a plurality of slits, each of which scans a range equal to or greater than a minimum stripe width; capturing means for capturing mirror images, reflected in the specular or semi-specular measurement-target surface, of the plurality of light-and-shade patterns displayed on the pattern displaying means; and surface-distortion distribution calculating means for performing image processing on the captured mirror images of the plurality of light-and-shade patterns to calculate surface-distortion distribution of the measurement-target surface.