1 November 2003 Novel data processing techniques for dispersive white light interferometer
Author Affiliations +
Optical Engineering, 42(11), (2003). doi:10.1117/1.1613958
White light interferometry has been used in the sensing area for many years. A novel data processing method for demodulating the information from the interference spectrum of a white light system is presented. Compared with traditional algorithms, both high-resolution and large dynamic range have been achieved with a relatively low-cost system. Details of this arithmetic are discussed. A compact white light interferometric system employing this algorithm has been developed, combined with fiber Fabry-Perot sensors. A ∓0.5-nm stability over 48 hours with a dynamic range on the order of tens of microns has been achieved with this system. The temperature dependence of this system has been analyzed, and a self-compensating data processing approach is adopted. Experimental results demonstrated a ∓1.5-nm shift in the temperature range of 10 to 45°C.
Bing Qi, Gary R. Pickrell, Juncheng Xu, Po Zhang, Yuhong Duan, Wei Peng, Zhenyu Huo, Hai Xiao, Russell G. May, Anbo Wang, "Novel data processing techniques for dispersive white light interferometer," Optical Engineering 42(11), (1 November 2003). http://dx.doi.org/10.1117/1.1613958


Data processing


Temperature metrology


Light sources

Light emitting diodes

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