2 August 2004 Pixelated phase-mask dynamic interferometer
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We demonstrate a new type of spatial phase-shifting, dynamic interferometer that can acquire phase-shifted interferograms in a single camera frame. The interferometer is constructed with a pixelated phase-mask aligned to a detector array. The phase-mask encodes a high-frequency spatial interference pattern on two collinear and orthogonally polarized reference and test beams. The phase-difference between the two beams can be calculated using conventional N-bucket algorithms or by spatial convolution. The wide spectral response of the mask and true common-path design permits operation with a wide variety of interferometer front ends, and with virtually any light source including white-light.
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James E. Millerd, James E. Millerd, Neal J. Brock, Neal J. Brock, John B. Hayes, John B. Hayes, Michael B. North-Morris, Michael B. North-Morris, Matt Novak, Matt Novak, James C. Wyant, James C. Wyant, } "Pixelated phase-mask dynamic interferometer", Proc. SPIE 5531, Interferometry XII: Techniques and Analysis, (2 August 2004); doi: 10.1117/12.560807; https://doi.org/10.1117/12.560807


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