A fiber optic electronic speckle pattern interferometry (ESPI) system has been demonstrated in which phase stepping was achieved at the frame rate of 25 Hz using a closed-loop control system. Satisfactory operation of the system was illustrated by producing correlation fringes by tilting a flat plate and using phase stepping to recover phase as a function of position on the plate. The expected linear dependence of phase on position was observed.
|Number of pages||5|
|Journal||IEE Conference Publication|
|Publication status||Published - 1991|
|Event||3rd International Conference on Holographic Systems, Components and Applications - Edinburgh, Scotl|
Duration: 16 Sep 1991 → 18 Sep 1991