6 April 2017 Compact holographic optical element-based electronic speckle pattern interferometer for rotation and vibration measurements
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Abstract
An out-of-plane sensitive electronic speckle pattern interferometer (ESPI) using holographic optical elements (HOEs) for studying rotations and vibrations is presented. Phase stepping is implemented by modulating the wavelength of the laser diode in a path length imbalanced interferometer. The time average ESPI method is used for vibration measurements. Some factors influencing the measurements accuracy are reported. Some advantages and limitations of the system are discussed.
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Viswanath Bavigadda, Viswanath Bavigadda, Mohesh Moothanchery, Mohesh Moothanchery, Manojit Pramanik, Manojit Pramanik, Emilia Mihaylova, Emilia Mihaylova, Vincent Toal, Vincent Toal, } "Compact holographic optical element-based electronic speckle pattern interferometer for rotation and vibration measurements", Proc. SPIE 10127, Practical Holography XXXI: Materials and Applications, 101270X (6 April 2017); doi: 10.1117/12.2251266; https://doi.org/10.1117/12.2251266
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