Extended-image-based correction of aberrations using a deformable mirror with hysteresis

Orestis Kazasidis, Sven Verpoort, Oleg Soloviev, Gleb Vdovin, Michel Verhaegen, Ulrich Wittrock

Research output: Contribution to journalArticleScientificpeer-review

5 Citations (Scopus)
98 Downloads (Pure)


With a view to the next generation of large space telescopes, we investigate guide-starfree, image-based aberration correction using a unimorph deformable mirror in a plane conjugate to the primary mirror.We designed and built a high-resolution imaging testbed to evaluate control algorithms. In this paper we use an algorithm based on the heuristic hill climbing technique and compare the correction in three different domains, namely the voltage domain, the domain of the Zernike modes, and the domain of the singular modes of the deformable mirror. Through our systematic experimental study, we found that successive control in two domains effectively counteracts uncompensated hysteresis of the deformable mirror.

Original languageEnglish
Pages (from-to)27161-27178
JournalOptics Express
Issue number21
Publication statusPublished - 2018


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