Demodulation technique for interferometric phase with a one-dimensional discrete Hilbert transform

Hiroto Watanabe; Ribun Onodera; Yukihiro Ishii

doi:10.1117/12.465828

20 September 2002 Demodulation technique for interferometric phase with a one-dimensional discrete Hilbert transform

Hiroto Watanabe, Ribun Onodera, Yukihiro Ishii

Proceedings Volume 4919, Advanced Materials and Devices for Sensing and Imaging; (2002) https://doi.org/10.1117/12.465828
Event: Photonics Asia, 2002, Shanghai, China

Abstract

The demodulation scheme by using a discrete Hilbert transform that can change the interferometric phase by π/2 has been investigated. In-quadrature components of a fringe pattern are obtained from one captured interferogram by using a one-dimensional (1-D) discrete Hilbert transform and a 1-D discrete high-pass filtering that are based on a digital signal processing technique. The phase distribution in the range of 15π[rad] can be demodulated with the proposed method. The 1-D discrete Hilbert transform can be extended to two-dimensional calculation with a raster sampling procedure.

Citation Download Citation

Hiroto Watanabe, Ribun Onodera, and Yukihiro Ishii "Demodulation technique for interferometric phase with a one-dimensional discrete Hilbert transform", Proc. SPIE 4919, Advanced Materials and Devices for Sensing and Imaging, (20 September 2002); https://doi.org/10.1117/12.465828

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