Dynamic measurement by digital holographic interferometry based on complex phasor method |
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Authors: | CJ Tay C Quan W Chen |
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Institution: | aDepartment of Mechanical Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore 117576, Singapore |
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Abstract: | In this paper, complex phasor (CP) method is employed in digital holographic interferometry. Unlike commonly used digital phase subtraction (DPS), the proposed technique processes a CP instead of phase. It is shown that the results obtained by directly filtering the phase produce large errors. It is demonstrated that the phase is not a signal but rather a property of a signal. In addition, the results obtained by the CP method are also compared with those obtained by conventional sine/cosine transformation method. |
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Keywords: | Dynamic measurement Digital holographic interferometry Complex phasor |
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