Compact holographic optical element-based electronic speckle pattern interferometer for rotation and vibration measurements

Compact holographic optical element-based electronic speckle pattern interferometer for rotation and vibration measurements

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...

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Bibliographic Details
Main Authors: Bavigadda, Viswanath, Moothanchery, Mohesh, Pramanik, Manojit, Mihaylova, Emilia, Toal, Vincent
Other Authors: School of Chemical and Biomedical Engineering
Format: Conference or Workshop Item
Language:English
Published: 2017
Subjects:
Holographic optical elements
ESPI
Online Access:https://hdl.handle.net/10356/80209
http://hdl.handle.net/10220/42117
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Institution: Nanyang Technological University
Language: English
Description
Summary: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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