Christopher Dr Griffen, Christopher Thomas Griffen, Christopher T Griffin, Christoph T Griffen, Christophe T Griffen, Christophe R Griffen, Christoe Griffen, Christo Griffen, Christophe Griffin
Fang Chen - Rochester Hills MI Mumin Song - Ann Arbor MI Patrick J. Harwood - Farmington Hills MI Christopher Thomas Griffen - Trenton MI
International Classification:
G01B 1124
US Classification:
356376
Abstract:
A measurement system (10) for accurately measuring the surface geometry of a part in three dimensions includes a laser (22) for emitting a laser beam (20). An objective lens (18) receives the laser beam (20) and expands the received laser beam (20) into a diverged beam. A liquid crystal system (16) is disposed in front of the objective lens (18) with respect to the laser (22) for receiving the diverged beam. The liquid crystal system (16) receives the diverged beam and generates at least one fringe pattern (24) on a surface of a three dimensional part which is to be measured. A computer (12) is in communication with the liquid crystal system (16) to control the pitch and phase of the fringe pattern (24).