Patent ID: 8899115

Claim:
A method for inspecting a surface of an object with an optical scanner and a laser vibrometer, the method comprising: mapping at least a portion of the object surface using the optical scanner; projecting a beam of light from the laser vibrometer onto the object surface at a measurement point; locating the measurement point relative to the object surface using the optical scanner; and measuring a position of the object surface using the laser vibrometer; wherein the locating of the measurement point comprises: detecting a reflection of the beam of light against the object surface; determining a centroid of the reflection; and determining a relative position of the centroid to the object surface; wherein the optical scanner is operated to detect light within a frequency band and a light intensity band; and wherein the beam of light is projected at a vibrometer frequency and an intensity, wherein at least one of the vibrometer frequency and the intensity is selected such that the reflection has at least one of a reflection frequency outside of the frequency band and a reflection intensity outside of the light intensity band.