Characterisation of the influence function non-additivities for a 1024-actuator MEMS deformable mirror

Details Characterisation of the influence function non-additivities for a 1024-actuator MEMS deformable mirror Characterisation of the influence function non-additivities for a 1024-actuator MEMS deformable mirror

2010-01-27

arxiv.org/abs/1001.5048v1

Astronomy and Astrophysics

Astrophysics

Instrumentation and Methods for Astrophysics

6 pages, 9 figures, Proceedings of the 1st AO for ELT conference, June 2009, Paris

Scientific paper

In order to evaluate the potential of MEMS deformable mirrors for open-loop applications, a complete calibration process was performed on a 1024-actuator mirror. The mirror must be perfectly calibrated to obtain deterministic membrane deflection. The actuator's stroke-voltage relationship and the effect of the non- additivity of the influence functions are studied and finally integrated in an open-loop control process. This experiment aimed at minimizing the residual error obtained in open-loop control.

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