Advanced 3D-printed EAP actuator applied to high precision large optical-quality surface fabrication: first results

K. Thetpraphi; G. Moretto; J. R. Kuhn; P. J. Cottinet; M. Q. Le; D. Audigier; L. Petit; J. F. Capsal

doi:10.1117/12.2556532

22 April 2020 Advanced 3D-printed EAP actuator applied to high precision large optical-quality surface fabrication: first results

K. Thetpraphi, G. Moretto, J. R. Kuhn, P. J. Cottinet, M. Q. Le, D. Audigier, L. Petit, J. F. Capsal

Author Affiliations +

Proceedings Volume 11375, Electroactive Polymer Actuators and Devices (EAPAD) XXII; 113751X (2020) https://doi.org/10.1117/12.2556532
Event: SPIE Smart Structures + Nondestructive Evaluation, 2020, Online Only

Abstract

LiveMetaOptics presented the Exo-life finder (ELF) telescope combined with the hybrid dynamic structure of live and light active mirror named as “Live-mirror”. Recently we reported the idea of active optical surface correction using the advantage of an electromechanical stimulator to deform mirror surface in a significant correction scale. An effort to develop a conventional electroactive polymer (EAP) actuator through Live-mirror application has been taken the new approach, assembling EAP actuator via additive manufacturing or 3D printing technology. The approach of next-generation mirror leaned on 3D printing technological advancement is able to unlock the principles of a potentially new actuator manufacturing technique. Full 3D print of modified EAP was formulated with plasticized terpolymer for an active layer and terpolymer/CB composite for printed electrodes. Though rudimentary of electroactive polymer, the full-printed actuator could transfer its transversal stress or shear force to shape the mirror surface under low applied electric fields. We described here as well creating multilayer structures with capabilities well beyond those of the individual actuator components. Our various configurations of printed actuators could achieve glass surface deformation in a range of 50 nm to 2 µm considering the maximum glass deformation. As a result of material modification coupled with 3D printing technology, we can increase productivity while enabling a mass and cost reduction and an increase of the parts functionality in terms of the real application.

Conference Presentation

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K. Thetpraphi, G. Moretto, J. R. Kuhn, P. J. Cottinet, M. Q. Le, D. Audigier, L. Petit, and J. F. Capsal "Advanced 3D-printed EAP actuator applied to high precision large optical-quality surface fabrication: first results", Proc. SPIE 11375, Electroactive Polymer Actuators and Devices (EAPAD) XXII, 113751X (22 April 2020); https://doi.org/10.1117/12.2556532

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