Turbulent Phase Screen With The Numerical Simulation Of Thermal Blooming Screen C + + Implementation

Adaptive optics is a new optical technology which has developed from the 70s of 20th century, applied in the fields such as laser communication, information collection and so on.By using Adaptive optics technology, one can improve the resolution ability of imaging system and the beam quality of laser system, solved technical problems such as laser wave-front aberration correction. As high accuracy and high real-time requirements lead to extremely complex in the adaptive optics system, and the cost of system implementation is very expensive. In order to reduce costs and save time,the use of computer simulation in the early theoretical research, system analysis and design of adaptive optics system is imperative.This thesis introduced the principle of adaptive optics system,which divided system into wave-front detection,wave-front reconstruction and wave-front aberration correction to analyze.We introduced the reason and interaction of turbulence and thermal blooming. The laser transmission in atmospheric environment influenced by the atmospheric turbulence, thermal blooming and the interaction between them and a series of linear and nonlinear effects are discussed.We analyzed the phenomena such as intensity scintillations, phase fluctuations caused by atmospheric turbulence and the calculation method of computing values.And we described in detail simulation of atmospheric turbulence random phase screen with Kolmogorov power spectrum.The method is simple and effective.We carried out preliminary research and established the specific simulation method of the steady-state thermal blooming and the characteristics of laser propagation in atmosphere.At the aspect of turbulence phase screen and thermal blooming phase screen numerical simulation implementation in C++,we modeled the structure of the whole system in Rational rose 2003 by using Object-oriented thinking and simulated system by making full use of vc6.0 development tools and c++ language. The basic framework, architecture of Adaptive optics system are introduced.The timing diagrams, class diagrams and relation diagrams are analyzed . Combined the development process and experimental parameters in the simulation system, we set the parameters and models adjustable,and completed the development of turbulence phase screen and thermal blooming phase screen in a real environment .So that adaptive optics system numerical simulation process is closer to the truth.Give numerical simulation results of turbulence phase screen, thermal blooming phase screen and the laser intensity resulted in the target plane.Through theoretical analysis of the turbulence phase screen and thermal blooming phase-screen algorithm numerical simulation,it showed that the algorithm is feasible and effective.This system is the first adaptive optics system in the C++ language.Provided an important reference for improving the adaptive optics system performance of wave front aberration correction,for mastering the law of laser propagation in atmosphere better, for studying the characteristics of turbulence, thermal blooming and adaptive optics system, Contribute to adaptive optics technology breakthroughs and innovation.