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Fig. 3 | Journal of the European Optical Society-Rapid Publications

Fig. 3

From: Improving the calibration of phase measuring deflectometry by a polynomial representation of the display shape

Fig. 3

Measured shape deviations of spherical concave mirror with radius R = 203.2 mm based on a) calibration assuming a plane display surface and b) using a polynomial display model of 7th order whose coefficients are determined during calibration. Both calibrations and shape evaluations were performed on the same phase measurement data. Measured shape deviation is reduced from PV = 33.40 μm, RMS = 8.23 μm in a) to PV = 1.98 μm, RMS = 0.46 μm in b) by application of the polynomial display model

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