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30 January 2004 Large mirror actuators in the 21st century
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Xinetics has been investigating ferroelectric actuator materials to meet the greater amplitude and higher bandwidth operation for the large mirror actuators of the 21st Century. This class of actuators features precision displacement control in terms of set-point accuracy and resolution, exhibits excellent dynamic response in terms of bandwidth and temporal response and feature thermal stability in terms of low power dissipation and low thermal expansion. High strain single crystal Pb(Mg1/3Nb2/3)O3-PbTiO3 (PMN-PT) actuators exhibit strains 3 times greater than the current ferroelectric PMN-based ceramic formulation. In addition, the lower dielectric constant of the single crystal material enables increased bandwidth operation. The major limitation to bringing single crystal multilayer devices to production levels is assembly cost and high operating voltages. A new technology in which the grains in the ceramic material are oriented - Nanotextured Ceramics - offers a technology to achieve near single crystal performance in a low cost, low voltage cofired multilayer actuator device. In this paper, we will discuss Xinetics’ solid state actuator development from randomly oriented ceramic to single crystal oriented materials.
© (2004) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Maureen L. Mulvihill and Mark A. Ealey "Large mirror actuators in the 21st century", Proc. SPIE 5166, UV/Optical/IR Space Telescopes: Innovative Technologies and Concepts, (30 January 2004);


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