Abstract
We used transmission deflectometry to measure the three-dimensional shapes of optical components, and we used the Hilbert transform to retrieve the phases from measured deformed fringe images. Deflectometry is useful for measuring large-scale samples, and specular samples. We have retrieved the phases from deformed fringe images and Hilbert-transformed images, and have used the least-squares method to find the height information. We have verified that phase retrieval using Hilbert transform is useful by computer simulation and experiment.Keywords: Deflrctometry, Phase measuring deflectometry, Hilbert transformOCIS codes: (120.0120) Instrumentation, measurement, and metrology; (120.2650) Fringe analysis; (120.3940) Metrology
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