It is not easy to prevent environmental noise while measuring object vibration by electronic speckle pattern interferometry. To meet the industrial requirement on vibration measurement, in this paper, environmental noise is re-investigated to establish a new ESPI method. In this paper, the environmental noise is treated as phase modulation driving force and applied both on the measuring object and optical system. Two images with the same nominal driving force but grabbed at different time are subtracted and then clearer, more stable and double denser fringe pattern than traditional ESPI pattern is obtained. Finally, the ways to analyze fringe pattern and associated errors have also been discussed.
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