An adaptive optics analog dynamic wavefront correction device and correction method thereof

Abstract

The invention discloses an adaptive optics analog dynamic wavefront correction device, which comprises a receiving antenna. The receiving antenna is sequentially provided with a collimating mirror, a beam expander system and a beam splitting prism along the optical path. The beam splitting prism is provided with a wavefront corrector along the reflection optical path. The dichroic prism is sequentially provided with a beam shrinking system and a wavefront sensor along the refraction optical path, and the wavefront corrector is connected with a computer. The correction method of the adaptive optical simulation dynamic wavefront correction device of the present invention has the characteristics of high applicability and practicability.

Description

technical field [0001] The invention belongs to the technical field of wireless laser communication, and relates to an adaptive optics simulation dynamic wavefront correction device, and also relates to a correction method for adaptive optics simulation dynamic wavefront using the above-mentioned device. Background technique [0002] Adaptive optics enables the optical system to automatically overcome external disturbances and maintain good system performance through real-time detection, control and correction of dynamic wavefront errors. The adaptive optics system is mainly composed of a wavefront sensor, a wavefront controller and a wavefront correction Among them, the quality of the control algorithm in the adaptive optics system has a great influence on the system performance. [0003] For the adaptive optics system of wavefront measurement, the commonly used control method is the PI control method. This controller has the advantage of no static error in the steady state...

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Problems solved by technology

[0003] For the adaptive optics system of wavefront measurement, the commonly used control method is the PI control method. This controller has the advantage of no static error in the steady state of the step response and can meet the requirements of tracking. The specific parameters are modified according to the actual situation of the experiment. In addition, there are pure integral control algorithms, Smith control algorithms, etc., but these algorithm simulations need to establish accurate mathematical models, and the design and adjustment of control parameters in practical applications are relatively complicated, and at the same time, it is necessary to take into account the intensity of atmospheric turbulence. Changes in the working environment such as the noise level of the detector are not adaptive to the external environment; therefore, adaptive control algorithms, Jacobian iterative algorithms and other algorithms were proposed for wavefront correction. Due to the complexity of these algorithms, The amount of real-time calculation is large, and there are high requirements for experimental devices and systems, so the practicability is poor, and it cannot be widely used in actual systems

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