The image stabilization of laser radiation at the stand of the adaptive optical system

Development of an adaptive optical system for stabilizing laser radiation and correcting its turbulent distortions

“…Compensation for rapidly changing small-scale aberrations of laser beams under the condition of repeatability of the parameters of the turbulent atmosphere on the stand of the tracking adaptive optical system [1] makes it possible to effectively develop adaptive correction algorithms, as well as to test systems of adaptive correction of turbulent distortions of laser radiation. Therefore, ensuring the repeatability of atmospheric parameters on the stand of the adaptive optical system must be provided as an element of the stand.…”

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

“…When creating, adjusting, and testing adaptive optics systems used in astronomy and vision systems in a turbulent atmosphere [1][2][3][4][5][6], the problem of atmospheric turbulence emulation becomes relevant, for example, to stabilize the radiation image on the photoreceiving matrix of an optical system [7,8].…”

“…A pinhole diaphragm (3) and zooming optics (4) form a collimated beam, the diameter of which is set by an adjustable diaphragm (5). The beam passes over the electric heating element (6), which creates thermal air flows and causes turbulent distortions in the beam, and enters the combining beam-splitting cube (7).…”

“…In the third module, the third optical beam is formed, generated by a laser (32), passes through a light filter (31), which sets its intensity, a pinhole diaphragm (30) and zooming optics (29), forming a collimated beam that passes through an adjustable diaphragm (28), which specifies the diameter of the emulated local inhomogeneity. When passing over the electric heating element (27), turbulent distortions of the wavefront are formed in the third beam, after which it enters the piezoceramic deflector (9), which sets the fluctuations in the beam tilt angle, and on the beam-splitting cube (10), the beam rotates 90 degrees and enters the beam-splitting cube (7), where it is aligned coaxially with the first (main) beam generated by the laser (1).…”

“…Thus, all three optical beams are combined on the beam-splitting cube (7) and arrive coaxially at the deflector (8), which sets the oscillations of the total tilt angle of the wavefront of the entire beam formed by the optical system as a whole.…”