Abstract: A specially arranged moire interferometry is proposed for measuring 3-D displacement fields in real time simuraneously. An optical arrangement is developed, which consists of three interferometry systerms: one normal incidence holographic interferometry and two Moire interferometry arrangements. An experimental demonsf-ation is conducted using a disc specimen with a high frequency cross line grating on its surface. The normal-mcidence holographic interferometry is used for obtaining the out of plane displac...