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- W2047938456 abstract "A multi-period fringe-projection interferometry with back-propagation method is described to measure surface profiles of a glass plate. Phase distribution of the multi-period fringe formed by interfering the two calumniated laser beams is utilized to determine the position of the two surfaces of the glass plate. The multiple optical fields of the different fringe periods on the two surfaces, which are obtained from the sinusoidal phase-modulated interference signals, are back-propagated to a position where all of the phases of the multiple optical fields become zero. At the same time, the amplitude of the sum of the multiple back-propagated fields becomes maximum. The distances of the back-propagation provide the positions of the two surfaces of the glass plate. In the experiment a glass plates of 2mm-thickness is measured with a precision of 2.3&mgr;m." @default.
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- W2047938456 date "2007-11-29" @default.
- W2047938456 modified "2023-09-23" @default.
- W2047938456 title "Multi-period fringe projection interferometry using back-propagation method for shape measurement of glass plate" @default.
- W2047938456 doi "https://doi.org/10.1117/12.768064" @default.
- W2047938456 hasPublicationYear "2007" @default.
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