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Quadratic extension to retrace error calibration algorithm for non-null interferometric surface figure testing of nominally flat reflective surfaces

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Abstract

We present a slope dependent calibration algorithm for interferometric surface figure testing. RMS wavefront error is reduced 40.7% (10.8% for linear method) from the uncalibrated measurement for a R/22.7 mirror tested against a flat reference.

© 2019 The Author(s)

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