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Proceedings Paper

Demodulation technique for interferometric phase with a one-dimensional discrete Hilbert transform
Author(s): Hiroto Watanabe; Ribun Onodera; Yukihiro Ishii
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Paper 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.

Paper Details

Date Published: 20 September 2002
PDF: 8 pages
Proc. SPIE 4919, Advanced Materials and Devices for Sensing and Imaging, (20 September 2002); doi: 10.1117/12.465828
Show Author Affiliations
Hiroto Watanabe, Univ. of Industrial Technology (Japan)
Ribun Onodera, Univ. of Industrial Technology (Japan)
Yukihiro Ishii, Univ. of Industrial Technology (Japan)


Published in SPIE Proceedings Vol. 4919:
Advanced Materials and Devices for Sensing and Imaging
Jianquan Yao; Yukihiro Ishii, Editor(s)

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