Detecting the vibration state of objects based on photorefractive materials

Vibration State of objects was detected based on photorefractive crystal, which photorefractive properties can be changed due to the vibration of crystal along its optical axis. To explain this, a mathematical model was proposed to simulate this process, and the vibration state (frequency and amplitude) are measured by the experiment and numerical calculation. The simulation and experiments show a good agreement. Our work imply that the photorefractive materials have good application prospects in motion detection.