Key elements of the fast adaptive optical system (AOS), having correction frequency of 1400 Hz, for atmospheric
turbulence compensation, are described in this paper. A water-cooled bimorph deformable mirror with 46 electrodes, as
well as stacked actuator deformable mirror with 81 piezoactuators and 2000 Hz Shack-Hartmann wavefront sensor were
considered to be used to control the light beam. The parameters of the turbulence at the 1.2 km path of the light
propagation were measured and analyzed. The key parameters for such an adaptive system were worked out.
For some applications it is necessary to transform an intensity distribution from Gaussian to a flattop, doughnut, etc. It could be performed with the use of adaptive optics that distorts the phase of the beam and changes the shape of the focal spot in the far-field. In this paper, we present the flattop and doughnut beam formation result with the use of a bimorph and stacked-actuator deformable mirrors. The experimental results are also given.
In this paper we present recent results of formation of different beam intensity distribution by means of bimorph deformable mirrors. We discuss the results of such formation as well as the problems that one faces on this way. A new method for beam structure modification is suggested based on the use of Shack-Hartmann wavefront sensor with the combination of standard M2 meter.
It is suggested to reconstruct the phase screens with the use of stacked-actuator deformable mirror and to compensate for the introduced distortions by the bimorph mirror. The reproducing and correction results are presented in the paper. The problems of the reconstruction and compensation are discussed.
It is suggested to measure non-axis parabolic mirrors aberrations and try to compensate for them. For the aberration prediction the computer modeling is used. For the aberration measurement Shack-Hartmann wavefront sensor is applied. For the aberrations compensation a digital algorithm is used.
It is suggested to reconstruct the phase screens with the use of different deformable mirror types. In this work we present the results of the phase screen reproducing with the use of stacked-actuator deformable mirror and bimorph one. The reconstruction results were compared. The problems of the reconstruction were discussed.
Sometimes to improve the performance of industrial or scientific laser technology it is desired to transform an intensity distribution from Gaussian to the flattop. The adjusting of the intensity profile can be implemented by means of adaptive optics. In this paper we present laser beam control with bimorph deformable mirrors. Shack-Hartmann wavefront sensor is used to determine the control signal for the bimorph deformable mirror while focal spot is observed with CCD camera to check the result of beam shaping.
It is desired to use some special intensity distribution on the target for various industrial applications. The adjusting of
the intensity profile can be implemented by means of adaptive optics. In this paper we present laser beam control in the
focal plane of lens with bimorph deformable mirrors. Hill-climbing method and stochastic algorithm are compared.
Advantages and disadvantages of two methods are discussed.