Characterization of electrically tunable liquid lens and adaptive optics for aberration correction

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Title:	Characterization of electrically tunable liquid lens and adaptive optics for aberration correction
Authors:	傅尹坤;Fuh, Yiin-Kuen;Chen, Jui-Kuan;Chen, Pin-Wen
Contributors:	工學院機械工程學系
Keywords:	Aberration compensation;Adaptive optics;Tunable liquid lens
Date:	2015-01-01
Issue Date:	2026-04-23 14:49:00 (UTC+8)
Publisher:	Urban und Fischer Verlag Jena;Elsevier GmbH
Abstract:	摘要： One specific kind of electrically tunable lenses is utilizing curvature change via adjusting input currents which electromagnetically exerts pressure on liquid volume to achieve variable-focusing properties. Nevertheless, the nature of curvature change and refractive index mismatch causes inherent spatial aberrations that severely degrade image quality. The novelty of the presented method lies in the experimental study of optical aberrations, such as root mean square (RMS), Strehl ratio and Zernike coefficients induced from electrically tunable lenses and use of adaptive optics to compensate for the wavefront errors. The optical properties of electrically tunable lens are quantitatively characterized by Shack – Hartmann measurements. Adaptive optics-based scheme is demonstrated for the current range 78–95mA, resulting in a substantial reduction of the wavefront errors from 0.55, 0.53 to 0.22, 0.2μm, respectively, corresponding to the focal power tunability of −2.52 to 0.2 diopters. It is experimentally showed that defocus (Z5) aberration is the most significant one since the changes of lens curvature varies in proportional with changing currents, and can be significantly improved from 0.328μm to 0.156μm with adaptive optics. Similar improvements can be found in piston (Z1)/tip (Z2)/tilt (Z3) aberrations with the integration of adaptive optics. 出版者： Elsevier GmbH 出版日期： 2015-12-01 出處： Optik (Stuttgart), 2015-12, Vol.126 (24), p.5456-5459 資源來源： Access articles in the ScienceDirect collection 版權： 2015 Elsevier GmbH 識別號： ISSN: 0030-4026 識別號： EISSN: 1618-1336 識別號： DOI: 10.1016/j.ijleo.2015.09.105
Appears in Collections:	[Departmant of Mechanical Engineering ] journal & Dissertation

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