%0 Journal Article
%A Saez Landete, José
%A Alonso Fernández, José
%A Bernabeu Martínez, Eusebio
%T Design of two-dimensional zero reference codes by means of a global optimization method
%D 2005
%@ 1094-4087
%U https://hdl.handle.net/20.500.14352/51197
%X A method to obtain the absolute measure of the position is by means of the autocorrelation of two zero reference marks. In one-axis measurement systems one dimensional mark are used and the design of these marks is relatively complex. When the movement is in two-axes, two dimensional reference marks are required and they are even harder to design. We report a method of global optimization to calculate the optimal two dimensional zero reference marks which generate the reference signal with the highest central peak. This method proves to be a powerful tool for solving this problem.
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