Impact of Birefringence Device on the Polarization Sounding of Airborne Lidar
双折射器件对机载激光雷达偏振探测影响的研究

Based on the theory of membranous layer,a mathematics analytical expression of polarization parallel components was proposed when backward echoed signals of airborne lidar incidence vertically on the crystal plane.The impact of polarizing prism on the polarization parallel components transmission of airborne lidar was analyzed quantificationally.Calculating results indicate that backward echoed signal polarization parallel component transmission of prism is affected by prism crystal thickness,air film thickness and angles of prism configuration.The real values of k of polarization sounding channels range from 0.82 to1.196 when measured value of k is 1.2 using 1/2 quartz retardation sheet under the condition of 532 nm wavelength backward echoed signal; however,the inversion of depolarization ratio will subject to bigger systematic error if the impact of 1/2 quartz retardation sheet on k is ignored.