Performance of large-format deformable mirrors constructed with TNO variable reluctance actuators

Rachel Bowens-Rubin; Philip Hinz; Wouter Jonker; Stefan Kuiper; Cesar Laguna; Matthew Maniscalco

doi:10.1117/12.2563659

13 December 2020 Performance of large-format deformable mirrors constructed with TNO variable reluctance actuators

Rachel Bowens-Rubin, Philip Hinz, Wouter Jonker, Stefan Kuiper, Cesar Laguna, Matthew Maniscalco

Proceedings Volume 11448, Adaptive Optics Systems VII; 114485V (2020) https://doi.org/10.1117/12.2563659
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only

Conference Poster

Abstract

Advancements in making high-efficiency actuators are an enabling technology for building the next generation of large-format deformable mirrors. The Netherlands Organization for Applied Scientific Research (TNO) has developed a new style of variable-reluctance actuator that requires approximately eighty times less power to operate as compared to the traditional style of voice-coil actuators. We present the performance results from laboratory testing of TNO's 57-actuator large-format deformable mirror from measuring the influence functions, linearity, hysteresis, natural shape flattening, actuator cross-coupling, creep, repeatability, and actuator lifetime. We measure a linearity of 99.4 ± 0.33% and hysteresis of 2.10 ± 0.23% over a stroke of 10 microns, indicating that this technology has strong potential for use in on-sky adaptive secondary mirrors (ASMs). We summarize plans for future lab prototypes and ASMs that will further demonstrate this technology.

Citation Download Citation

Rachel Bowens-Rubin, Philip Hinz, Wouter Jonker, Stefan Kuiper, Cesar Laguna, and Matthew Maniscalco "Performance of large-format deformable mirrors constructed with TNO variable reluctance actuators", Proc. SPIE 11448, Adaptive Optics Systems VII, 114485V (13 December 2020); https://doi.org/10.1117/12.2563659

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