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13 May 2013Absolute testing of flats with all terms by using even and odd functions
In Cartesian coordinate system, a flat can be expressed as the sum of even-odd, odd-even, even-even and oddodd
functions. In the traditional three-flat even and odd function method, odd-odd function is difficult to obtain. In
our paper the odd-odd function can be solved by use the Dove prism which can rotate the optical axis. The odd-odd
function can calculate exactly. The even-odd, odd-even, even-even can be solved by rotating the flat 180°like the
traditional method. Only five configurations are used to test the flats. The theoretical derivation and analysis are
presented.
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Xin Jia, Fuchao Xu, Tingwen Xing, Zhixiang Liu, "Absolute testing of flats with all terms by using even and odd functions," Proc. SPIE 8789, Modeling Aspects in Optical Metrology IV, 878911 (13 May 2013); https://doi.org/10.1117/12.2019722