Abstract
A new optical fringe-counting method that entails coding interference fringes is proposed. This method features not only the implementation of reliable bidirectional optical fringe counting but also the accurate counting of oscillating optical fringes. Its main merit is the achievement of a higher phase resolution, λ/16 (λ, wavelength), as opposed to λ/8 of earlier fringe-counting methods. The robustness of fringe-code counting with regard to relative phase variations in the sine and cosine interference signals constitutes another merit of this method. The principle and realization circuit of the fringe-code-counting method are described in detail, and the experimental results with a resolution of λ/16 are presented to show the feasibility of this method.
© 2005 Optical Society of America
Full Article | PDF ArticleMore Like This
Fabrizio Barone, Enrico Calloni, Rosario De Rosa, Luciano Di Fiore, Francesco Fusco, Leopoldo Milano, and Guido Russo
Appl. Opt. 33(7) 1194-1197 (1994)
Ettore Pedretti, Wesley A. Traub, John D. Monnier, Rafael Millan-Gabet, Nathaniel P. Carleton, F. Peter Schloerb, Michael K. Brewer, Jean-Philippe Berger, Marc G. Lacasse, and Sam Ragland
Appl. Opt. 44(25) 5173-5179 (2005)
Haijiang Hu and Fengdeng Zhang
Appl. Opt. 50(15) 2140-2144 (2011)