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The optimized wavelength combinations of two broadband sources for white light interferometry

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5 Author(s)
Wang, D.N. ; Dept. of Electr., Electron. & Inf. Eng., City Univ., London, UK ; Ning, Y.N. ; Grattan, K.T.V. ; Palmer, A.W.
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Two broadband sources can be used in combination in white light interferometry to simplify the problem of central fringe identification. In this paper, a method for selecting the optimum wavelength combinations of such sources is presented. The results are obtained from a theoretical analysis and computer simulations, verified by experiment. It has been shown that the minimum signal-to-noise ratio required by the system to identify the central fringe position can be greatly reduced by using the optimum wavelength combination

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Lightwave Technology, Journal of  (Volume:12 ,  Issue: 5 )