Two-wavelength interferometric signal processing by recurrence filtering method

Igor P. Gurov; A. Kirienko

doi:10.1117/12.373658

29 December 1999 Two-wavelength interferometric signal processing by recurrence filtering method

Igor P. Gurov, A. Kirienko

Proceedings Volume 4016, Photonics, Devices, and Systems; (1999) https://doi.org/10.1117/12.373658
Event: Photonics Prague '99, 1999, Prague, Czech Republic

Abstract

Two-wavelength interferometry technique provides accurate measurement of geometric values in extended range of measurement definition. We propose the approach to two- wavelength interferometric signal processing based on recurrence data filtering. Interferometer is illuminated by monochromatic light source on two wavelength simultaneously. The position of reference mirror is changed step by step inside the range defined by 'synthesized' wavelength. It is used the recurrence least-square fitting algorithm to estimate the two-wavelength interferometric signal parameters dynamically taking into account the particularities of the signal model. To suppress the background and noise influence the discrete recurrence filters with linear phase characteristics have been used.

Citation Download Citation

Igor P. Gurov and A. Kirienko "Two-wavelength interferometric signal processing by recurrence filtering method", Proc. SPIE 4016, Photonics, Devices, and Systems, (29 December 1999); https://doi.org/10.1117/12.373658

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