title: Moire method to determine separate frequency contributions in vibration patterns.
abstract: Interference holography with a pulsed ruby laser is used as a tool for analyzing complex mechanical vibrations. With the aid of a moire technique, the combination of two interferograms taken in special, electronically controlled conditions yields the contribution to the vibration pattern corresponding to a single frequency. Quantitative analysis then follows the same lines as in ordinary holographic interferometry.
authors.affiliation: Institute of Applied Physics, Delft, The Netherlands.
authors.forename: R A
authors.initials: RA
authors.lastname: Rooth
authors.forename: H J
authors.initials: HJ
authors.lastname: Frankena
authors.forename: F H
authors.initials: FH
authors.lastname: Groen