Process for the determining the vibration characteristics of a body

摘要

PCT No. PCT/EP95/02316 Sec. 371 Date Apr. 14, 1997 Sec. 102(e) Date Apr. 14, 1997 PCT Filed Jun. 14, 1995 PCT Pub. No. WO96/04532 PCT Pub. Date Feb. 15, 1996A process is disclosed for determining the vibration characteristics of a body by modal analysis. The body is made to vibrate at different frequencies and optical interference images of the body are recorded for the different frequencies. The interference images are analyzed on the basis of a mathematical/physical model, in view of the vibration characteristics at predetermined points, and the thus obtained information about the vibration characteristics of said points is subjected to a modal analysis.