Design And Analysis Of Double Zoom Electrowetting Lenses Array For Wavefront Correction

Free space optical communication technology uses the atmosphere as a transmission medium.The quality of optical communication transmission is reduced because factors such as spray,snow,aerogel,and atmospheric turbulence destroy the wave-front transmitted through the optical medium.Adaptive optics technology can effectively correct the wave-front distortion of the optical signal transmitted in the atmosphere and improve the quality of optical communication transmission.Therefore,adaptive optics technology is the key technology in the field of free space optical communication.In this paper,an array of dual-zoom liquid lens based on the dielectric wetting effect is developed to correction and compensation for different types of wave-front aberrations.The main research work is as follows:1.The research background and development status of adaptive optics and its wave-front corrector are summarized.The principles of electrowetting-on-dielectric,adaptive optical wave-front correction and common optical phase correction methods are introduced.The correction principle of wave-front corrector based on dual-zoom liquid lens and relevant evaluation indexes.2.The model of dual-zoom liquid lens based on electrowetting-on-dielectric is constructed by COMSOL software.The evolution of interface shape with voltage is simulated.The variation ranges of liquid interface S1 and S2 of triple liquid lens are calculated,which provides parameters for the following wave-front compensation system.3.The electrowetting-based dual-zoom liquid lens array is employed as wave-front correction system.The aberrations caused by piston,tip-tilt and curvature can be compensated and corrected by changing the interface shape of dual-zoom liquid lens.In the meantime,the spot diagram,wave-front distribution and point spread function(PSF)distribution are analyzed and discussed.The results show that the electrowetting-based dual-zoom liquid lenses array can compensate for the different types of wave-front aberrations caused by piston,tip-tilt and curvature.The root mean square(RMS)radius value decreased from the intial value 3.474?m to 1.45?m.The peak-valley(PV)value reduced from the original 1.861? to 0.285?,the RMS value decreased from 0.421? to 0.053?.And the Strehl ratio increased from 0.161 to 0.917.