Semipassive bimorph flexible mirrors for atmospheric adaptive optics applications

The problem of optimization of the adaptive optical system using local curvature sensor is discussed. Computer simulations of the sensor including closed-loop operation are. based on ray-tracing technique and numerical solution of Poisson equation by FEM method. Wavefront restoration for both axial symmetric and non-axial symmetric phase distortions is examined. It is shown, that choosing appropriate geometry of the actuator external electrodes one can improve wavefront restoration for the case ofnon-circularly symmetric Zernike aberrations.

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“…(X) •cos (2) The data obtained show that residual distortion of the wavefront decreases fast with increase of iteration number.…”

Section: Symmetric Wavefront Aberrationsmentioning

confidence: 91%

Computer simulation of the wavefront correction system with local curvature sensing

2002

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“…In our work we suggested to use the semipassive bimorph mirror to compensate for the aberrations of the laser beam 3 . The advantages of the use of such mirrors in adaptive system are: continues deformation for the mirror surface (no diffraction losses on the edges of controlled subapertures), large deformation of the surface (up to 30 microns), wide dynamic range (up to several kHz), ability to hold high radiation loading (up to 3 kW CW per cm 2 ) and one of the most important featuresthe possibility to correct for the low-order aberrations by minimal number of controlled elements (channels).…”

Section: Wavefront Correctormentioning

confidence: 99%

Adaptive systems for single pulse lasers

Kudryashov

Alexandrov

Samarkin

2006

Laser Beam Control and Applications

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“…Meanwhile, an optical system that will reproduce aberrations in real time may be very important for testing of, for example, customized contact lens or intraocular lens. We propose the model of a "live eye "based on our bimorph flexible mirror 10,11 . The scheme of the live eye is presented in fig.…”

Section: Live Eyementioning

confidence: 99%

Double-pass measurement of human eye aberrations: limitations and practical realization

et al. 2004

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The problem of correct eye aberrations measurement is very important with the rising widespread of a surgical procedure for reducing refractive error in the eye, so called, LASIK (laser-assisted in situ keratomileusis). The doublepass technique commonly used for measuring aberrations of a human eye involves some uncertainties. One of them is loosing the information about odd human eye aberrations. We report about investigations of the applicability limit of the double-pass measurements depending upon the aberrations status introduced by human eye and actual size of the entrance pupil. We evaluate the double-pass effects for various aberrations and different pupil diameters. It is shown that for small pupils the double-pass effects are negligible. The testing and alignment of aberrometer was performed using the schematic eye, developed in our lab. We also introduced a model of human eye based on bimorph flexible mirror. We perform calculations to demonstrate that our schematic eye is capable of reproducing spatial-temporal statistics of aberrations of living eye with normal vision or even myopic or hypermetropic or with high aberrations ones.

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Semipassive bimorph flexible mirrors for atmospheric adaptive optics applications

Cited by 66 publications

References 18 publications

Computer simulation of the wavefront correction system with local curvature sensing

Computer simulation of the wavefront correction system with local curvature sensing

Adaptive systems for single pulse lasers

Double-pass measurement of human eye aberrations: limitations and practical realization

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