The Study Of Adaptive Optics Image Restoration

The movement of atmospheric turbulence causes random changes in atmospheric refractive index, which leads into light flashes and image light shake effects. Plane light beam occurs distortion when it goes through turbulence media, the image received by the detector has not reached diffraction limit. Adaptive optics technology is the most effective method of overcoming effects of atmospheric turbulence which affects imaging, Adaptive optics technology receive wavefront aberration through wavefront sensor, real-time correcting at last. Adaptive optics system can not mount on all of the optical systems (mostly ground telescope systems) due to expensive cost, and this system can not compensate completely to the atmospheric turbulence, so it is essential to do post-processing for the image which has been rectified by Adaptive optics system. This paper mainly describes basic theory and algorithm about image restoration, the main work include as follows:1.The generation mechanism of turbulence is discussed in detail, simulating the random phase screen by using the Fourier transform method.2.Basic principle of adaptive optics systems and components is introduced.3.The image restoration algorithm is studied, including the traditional restoration algorithm and the partial differential algorithm which has rose gradually in recent years, The H1, TV, and adaptive TV model of the partial differential equation is studied deeply, detail algorithm has been given and recovery the degraded image using these models.