Modeling and Control of Deformable Membrane Mirrors
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TLDR
The use of deformable mirrors (DMs) in adaptive optics (AO) systems allows for compensation of various external and internal optical disturbances during image aquisition as discussed by the authors, which can provide promising examination and treatment opportunities.Abstract:
The use of deformable mirrors (DMs) in adaptive optics (AO) systems allows for compensation of various external and internal optical disturbances during image aquisition. For example, an astronomical telescope equipped with a fast deformable secondary mirror can compensate for atmospheric disturbances and wind shake of the telescope structure resulting in higher image resolution [1–4]. In microscopy, deformable mirrors allow to correct for aberrations caused by local variations of the refractive index of observed specimen. Especially confocal and multi-photon microscopes particularly benefit from the improved resolution for visualization of cellular structures and subcellular processes [5, 6]. In addition, results of applied adaptive optics for detection of eye diseases and in vitro retinal imaging on the cellular level show promising examination and treatment opportunities [7–9].read more
Citations
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Proceedings ArticleDOI
Adaptive optics in microscopy
TL;DR: Applications of adaptive optics in the related areas of optical data storage, optical tweezers and micro/nanofabrication are reviewed, particularly in confocal and two-photon microscopes.
Journal ArticleDOI
Subspace Identification of Distributed Clusters of Homogeneous Systems
Chengpu Yu,Michel Verhaegen +1 more
TL;DR: The Markov parameters of the decoupled LTI systems are identified first by solving a nuclear-norm regularized convex optimization, following the state-space realization of a single LTI system within the cluster by solving another nuclear- norm regularized optimization problem.
Journal ArticleDOI
Deformation control of a thermal active mirror
Rudolf Saathof,Rudolf Saathof,Martijn V. Wansink,E. C. Hooijkamp,Jo W. Spronck,Robert H. Munnig Schmidt +5 more
TL;DR: In this article, a demonstrator adaptive optics-system with a thermally actuated active mirror (AM) is presented to pre-study feasibility of sub-nm wavefront control in extreme ultraviolet (EUV) lithography.
Journal ArticleDOI
Point-actuated feedback control of multidimensional interfaces
Ruben J. Tomlin,Susana N. Gomes +1 more
TL;DR: In this article, the authors consider the application of feedback control strategies with point actuators to stabilise desired interface shapes and find that point-actuated control may inhibit unbounded growth of a solution, if they are sufficient in number and in strength, and can exponentially stabilise the desired state.
Journal ArticleDOI
Influence functions for a hysteretic deformable mirror with a high-density 2D array of actuators
TL;DR: Modeling and analysis of a hysteretic deformable mirror where the facesheet interacts with a continuous layer of piezoelectric material that can be actuated distributively by a matrix of electrodes through multiplexing is presented.
References
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TL;DR: In this article, a comprehensive study of elastic wave propagation in solids is presented, ranging from the theory of waves and vibrations in strings to the three-dimensional theory of elastic waves in thick plates.
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An Introduction to the Finite Element Method
TL;DR: Second-order Differential Equations in One Dimension: Finite Element Models (FEM) as discussed by the authors is a generalization of the second-order differential equation in two dimensions.
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TL;DR: In this paper, a book on analytical methods in vibrations covering general mathematical formulations of common features of various vibrating systems is presented, including a mathematical formulation of a vibrational model.
Journal ArticleDOI
Supernormal vision and high-resolution retinal imaging through adaptive optics
TL;DR: A fundus camera equipped with adaptive optics is constructed that provides unprecedented resolution, allowing the imaging of microscopic structures the size of single cells in the living human retina.
Journal ArticleDOI
Geometry and Physics of Wrinkling
TL;DR: A general theory of wrinkling is deduced, valid far from the onset of the instability, using elementary geometry and the physics of bending and stretching to form the basis of a highly sensitive quantitative wrinkling assay for the mechanical characterization of thin solid membranes.