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As Fizeau interferometer(FI) produces linear fringes which can be conveniently detected by a linear detector, the direct detection Doppler lidar based on Fizeau fringe technique may prior to that based on Fabry-Perot fringe technique. The principle of Fizeau fringe technique and the retrieved method for Doppler frequency are discussed elaborately. In order to further study the Fizeau fringe imaging...
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