Performance of large-format deformable mirrors constructed with hybrid variable reluctance actuators II: Initial lab results from FLASH
conference paper
Advancements in high-efficiency hybrid variable reluctance (HVR) actuators are an enabling technology for building the next generation of large-format deformable mirrors, including adaptive secondary mirrors. The Netherlands Organization for Applied Scientific Research (TNO) has developed a new style of hybrid variable reluctance actuator that requires approximately seventy-five times less power to operate as compared to the traditional style of voice-coil actuators. We present the initial performance results from laboratory testing of TNO’s latest 19-actuator prototype deformable mirror, FLASH. We report the actuator cross-coupling, linearity, hysteresis, natural shape flattening, and drift as measured with a Zygo interferometer and a set of four capacitive sensors. We also present results of the dynamic performance of the FLASH on sub-millisecond timescales to estimate the limits of this technology for high-contrast imaging adaptive optics. We confirm that this technology has strong potential for use in on-sky adaptive secondary mirrors without the need for active cooling.
Topics
TNO Identifier
968123
ISSN
0277786X
ISBN
9781510644847
Publisher
SPIE
Article nr.
118231R
Source title
Proceedings of Techniques and Instrumentation for Detection of Exoplanets X, 2021, 1-5 August 2021, virtual
Editor(s)
Ruane, S.B.
Sshaklan, G.J.
Sshaklan, G.J.
Collation
20 p.
Files
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