Thermomechanical design, hybrid fabrication, and testing of a MOEMS deformable mirror
| Autor: | Andreas Tünnermann, Michael Appelfelder, Ramona Eberhardt, Erik Beckert, Sylvia E. Gebhardt, Claudia Reinlein |
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| Přispěvatelé: | Publica |
| Rok vydání: | 2013 |
| Předmět: |
Fabrication
Materials science Multiphysics homogeneous loading unimorph thermally-induced deformation Deformable mirror Optics Thermal Unimorph Ceramic Laser power scaling Electrical and Electronic Engineering Composite material deformable mirror compound loading laser-induced deformation business.industry Mechanical Engineering Condensed Matter Physics Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials visual_art visual_art.visual_art_medium Actuator business |
| Zdroj: | Journal of Micro/Nanolithography, MEMS, and MOEMS. 12:013016 |
| ISSN: | 1932-5150 |
| DOI: | 10.1117/1.jmm.12.1.013016 |
| Popis: | This paper reports on the thermomechanical modeling and characterization of a micro-opto-electro-mechanical systems deformable mirror (DM). This unimorph DM offers a low-temperature cofired ceramic substrate with screen-printed piezoceramic actuators on its rear surface and a machined copper layer on its front surface. We present the DM setup, thermomechanical modeling, and hybrid fabrication. The setup of the DM is transferred into a thermomechanical model in ANSYS Multiphysics. The thermomechanical modeling of the DM evaluates and optimizes the mount material and the copper-layer thickness for the loading cases: homogeneous thermal loading and laser-loading of the mirror. Subsequently, the developed and theoretically optimized DM setup is experimentally validated. The homogeneous loading of the optimized design results in a membrane deformation with a rate of −0.2 μm K −1 , whereas the laser loading causes an opposed change with a rate of −0.2 μm W −1 . Therefore, the proposed mirror design is suitable to precompensate laser-generated mirror deformations by homogeneous thermal loading (heating). We experimentally show that a 35-K preheating of the mirror assembly compensates for an absorbed laser power of 1.25 W. Therefore, the novel compensation regime “compound loading” for the suppression of laser-induced deformations is developed and proven. |
| Databáze: | OpenAIRE |
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