Patent ID: 6610992
Filing Date: 2003-08-26
Classification: G01B,G01N

Abstract:
A method of measuring parts with an optical signal, comprising the steps of:(a) rotating an outer look ahead optical beam to determine portions of a part outside of perimeter edges and perimeter openings of the part; (b) rotating an inner scan optical beam concentric to the outer beam to measure the perimeter edges of the part and the perimeter edges of the openings, wherein the outer beam restricts the inner beam to measuring the perimeter edges of the part and the perimeter edges of the openings, and the outer and the inner beams are substantially perpendicular to the part; (c) tracing side perimeter edges of the part with the outer and the inner beams; (d) scanning over a surface of the part to locate the openings in the part with the inner and outer beams; and (e) tracing the perimeter edges of the openings with the inner and the outer beams, wherein the side perimeter edges, the locations of the openings and the perimeter edges of the openings provide a topographical measurement of the part.