Fig. 1. Principle of dynamic holography

Fig. 2. Principle of in-plane vibration measurement

Fig. 3. Schematic of experimental setup

Fig. 4. Diffracted output voltage versus intensity ratio of reference beam to signal beam

Fig. 5. Layout of the comparison experiment of proposed system with PDV100 vibrometer

Fig. 6. Comparison of the measurement results by proposed system and PDV100

Fig. 7. Comparison results at different frequencies. (a) 500 Hz; (b) 1 kHz; (c) 5 kHz

Fig. 8. Measurement results of proposed system at different frequencies. (a) 30 kHz; (b) 80 kHz; (c) 170 kHz; (d) 240 kHz