Determination of Phase Shift by Digital Holography


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In phase shifting interferometry phase shift is applied by various ways, but applying it with high accuracy, especially by LD current modulation, is not easy. In order to determine the accurate phase shift a new method has been proposed that the value of LD current corresponding to π/2 phase shift can be determined by phase shifting digital holography. The measured data of standard in surface shape measurement were used for calibration, and the obtained value was confirmed to cause noise reduction and improvement of holographic reconstructed images in digital holography.



Edited by:

Osamu Hanaizumi




Y. Takahashi et al., "Determination of Phase Shift by Digital Holography", Applied Mechanics and Materials, Vol. 888, pp. 43-46, 2019

Online since:

February 2019




* - Corresponding Author

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