Holographic interferometry of impact-loaded objects using a double-pulse laser

Abstract Some examples of dynamic holographic interferometry are presented. Two Q-switched laser pulses each of energy 30 mJ and separated by 25 μs are used to record holographically the transient impulse response of diffusely reflecting objects occupying volumes of about (30 cm)3. The laser was of simple form and was not confined to single axial or transverse mode.