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Fig. 1 | Journal of the European Optical Society-Rapid Publications

Fig. 1

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

Fig. 1

a) Principle of Phase Measuring Deflectometry: A display shows a pattern which is observed by a camera as reflection at the surface under test, distorting the image. Displaying multiple phase-shifted sine pattern enables phase measurement to trace each camera ray to the display. b) Calibration procedure: A confocal white-light distance sensor marks a reference point in space which is on the surface of a plane calibration mirror. Phase measurements for multiple rotated orientations of the mirror around arbitrary axis through the reference point enable determination of position and orientation of camera, display and reference point

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