How good the mirrors will correct our aberrations?

Information about the spatial and temporal spectra of the aberrated wavefronts is required for a good answer to this question. Membrane mirrors in general are good in correcting smooth continuous aberrations. 37-ch MMDM provides high-quality correction of all 3-rd order aberrations and is reasonably good in correcting the 5-th order aberrations. 79-ch MMDM will correct aberrations up to 5th order. PDM with 19 and 37 channels will correct low order aberrations with relatively large amplitude. OKO mirrors can be flattened to produce better than ?/20 rms reflected wavefronts. Contact OKO with specific questions on the correction performance.

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