The Analysis Of Neutral Point On Shape-? Characteristic Of The Atmosphere Polarization Pattern

Atmospheric polarization mode contains abundant information.Through the detection and calculation of atmospheric polarization mode distribution,information such as spatial azimuth,surface characteristics and atmospheric composition can be obtained.For polarized light navigation,biological polarization sensing mechanism,atmospheric optical property analysis and remote sensing detection and other research is of great significance.Based on the Berry polarization field singularity theory,the ?shape distribution of the atmospheric polarization pattern in the ideal and actual atmospheric environment is analyzed respectively.The results show that the ? shape of the atmospheric polarization pattern is analyzed.In addition,the design of the sun position tracking algorithm,completed the all-day atmospheric polarization pattern measurement and protection system of automatic control,to solve the field test experiments,the sun direct light on the all-day atmospheric polarization pattern measurement device caused by exposure problem.The main contents of this paper are as follows:(1)The problem of neutral point can not be described for the ideal single scattering atmospheric polarization model.Based on the theory of polarization point singularity splitting,the modeling analysis of the effect of neutral point on the ? shape distribution of atmospheric polarization pattern· is carried out.The experimental results show that the ? shape of the atmospheric polarization mode is distorted,degraded and shifted by the existence of the neutral point,resulting in ?-shaped foliage.(2)In order to solve the problem of image over-exposure caused by the solar direct light on the whole sky domain atmospheric polarization pattern measurement device,the solar position tracking algorithm is designed,and the automatic control of the whole day domain atmospheric polarization mode measurement and protection system is realized.The system realizes the direct sunlight on the sun,which solves the problem of over-exposure when collecting images,thus providing protection for unattended atmospheric polarization pattern observation experiment.(3)The experiment of atmospheric polarization pattern under different time and different wavelengths is carried out.The experimental results show that the influence of the ? shape distribution on the variation of the impeller is consistent with the experimental results,Moreover,the neutral point due to the difference between the band,the actual position will change,which 405nm band under the neutral point distribution and the theory of closer,while the band under the ? font feature distribution by the neutral point of the impact and the results of theoretical experiments closer.