Deflector for correction of tilts angles of wave front

Efficiency of stabilization of laser radiation on the stand of an adaptive optical system

“…Using the turbulence emulation program [19,20], a set of control signals for the Tip-Tilt mirror [1], simulating tilts, was generated on the stand of the tracking adaptive optical system. A set of control signals for a Tip-Tilt mirror, simulating tilts can also be formed based on the results of track measurements [9,21].…”

“…The deviation of the radiation image in the focal plane is due to the displacement of the radiation propagation axis under the influence of the distorting influence of the atmosphere and is proportional to the slopes of the wave front. To stabilize the radiation at the input aperture of the optical system, a Tip-Tilt mirror as corrector of wavefront slopes is used [1].…”

Emulation of atmospheric turbulence for image stabilization of laser radiation on the stand of adaptive optical system

“…Atmospheric turbulence emulation stand, which includes three sources of laser radiation rigidly interconnected on a common basis, on the optical axes of which light filters, pinholes and zooming optics, adjustable diaphragms, electric heating elements, video control camera are installed at equal heights. The bench includes piezoceramic deflectors (PD) [17].…”

“…Similarly, in the second module, a second optical beam is formed, generated by a laser (26), it passes through a light filter (25), which sets the intensity of this beam, a pinhole diaphragm (24) and zooming optics (23), which forms a collimated beam that passes through an adjustable diaphragm ( 22), which specifies the diameter of the emulated local inhomogeneity. When passing over the electric heating element (21), turbulent distortions of the wave front are formed in the second beam, after which the beam enters the piezoceramic deflector (17), which sets the fluctuations in the beam tilt angle; in the beam-splitting cube (18), the beam is rotated by 90 degrees, passes through the beam-splitting cube (10) and enters the beam-splitting cube (7) that combines the light beams, where it is aligned coaxially with the first beam.…”

“…Also, the computer through the electric heating elements control unit (13) ensures the formation of thermal air flows over the electric heating elements (6,11,21,27) and their intensity to create the required turbulence in the optical beams. The computer through the control units (14,15,16) programmatically sets the tilts of the deflector mirrors (9,8,17), forming the tilt angles of the wave front of the corresponding beams.…”