From left to right: ASM with segments involved in the bisymmetric pupil deconvolution in red and the color of the other segments indicates the NCPA offset MAP applied to the ASM; dOTF phase measurement without deconvolution, and dOTF phase measurement after deconvolution.
From left to right: dOTF phase measurement with PIAA M1/M2, metrological control of PIAACMC mirrors using a ZYGO interferometer (2D map of M1 and M2 obtained over a 12 mm diameter).
For more details, see our SPIE 2024 paper: Differential optical transfer function (dOTF) wavefront sensing with the SPEED test-bed
