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Random incident light field when the cat's eye effect

Author: HanYong
Tutor: WuJian
School: University of Electronic Science and Technology
Course: Optics
Keywords: Atmospheric turbulence Laser transmission Cat's Eye system Echo characteristics
CLC: O436
Type: Master's thesis
Year: 2008
Downloads: 98
Quote: 1
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Abstract


Cat eye effect on the actual battlefield , the use of the optical system of active laser detection , laser transmission inevitably be influenced by atmospheric turbulence , to reach the cat's eye system ( in this article refers to the detection target beam of the optical system ) An extended drift intensity flashing phase fluctuation , a wavefront distortion and other effects , atmospheric turbulence effects . These turbulence effects on the use of the cat's eye effect is unfavorable . The traditional methods of the cat's eye effect in the study of the optical system , establish geometrical optics method of beam incident when the rules . However, after the probe laser emitting in the transmission process by the atmospheric turbulence , to reach the target optical system , the light field , with a turbulence statistical characteristics of random light field . Active laser detection feasibility of the use of the cat's eye effect analysis , the objective optical system of the cat's eye effect can no longer follow the traditional geometric approach to analysis . Research and analysis of how random light field transmitted through the optical system , the main work of this paper . This paper the main results are as follows : ( 1 ) through a multi- phase screen method , the numerical simulation of the transmission of the laser through atmospheric turbulence , access to reach the cat's eye system random optical field distribution ; ( 2 ) proposed to calculate the phase screen new method , Malacara polynomial used to generate turbulent phase screen with Zernike polynomials method of simulation results are compared , and found that the results closer to the statistical theory of value ; (3) proposed the use of a random light field phase fluctuation distribution construct the wave surface geometry of the method , to study random distortion wave surface morphology changes provide a prerequisite ; (4) the use of Collins diffraction integral method to calculate and simulate a random incident light field when the back wave field distribution , is to study the beam of backhaul transmission the initial conditions; (5) in Matlab environment throughout the transfer process described above , the process simulation, input parameters related to the obtained relevant transmission results and image . The program for the formation of this subject final software , has laid a good foundation .

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CLC: > Mathematical sciences and chemical > Physics > Optics > Physical optics ( wave optics )
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