Research On The Polarizer For The Bionic Micro-nano Navigation System

In this thesis, the concept that micro-nano polarization sensitive arrays simulate the compound eyes of the desert ant is introduced.The structure of the compound eyes of the desert ant is simulated, and the micro-polarizer is designed and fabricated. So it is possible to develop a micro-bionic vision sensor that is high sensitivity, high accuracy and low power consumption.The design and the simulation of the wire-grid and the fabrication and the test of the polarizing film are mainly studied. The research of the two polarizers lays the foundation for the realization of the micro-nano navigation system.According to the request of the sensitive wave band of 0.52-0.59μm of the Bionic Micro-nano Navigation System, wire-grid is designed using the rigorous couple-wave theory, and its structure is designed and optimized by Gsolver software. Effects of different grating materials, grating shapes and grating parameters on the TM polarization transmission efficiency as well as the extinction ratio are analyzed, and the corresponding wire-grid polarizer is designed. When it works at the normal incidence, difference between the designed grating and conventional wire-grid is that the former adds the magnesium fluoride between the fundus and the grating, and the TM polarization transmission efficiency and the extinction ratio are increased.The TM polarization transmission efficiencies are more than 50 percentages and the extinction ratios are more than 170 when the incident wavelength is varied from 0.38μm to 0.40μm or from 0.50um to 0.76μm, which meets the expectations for wide band, high TM polarization transmission efficiencies and high transmission extinction ratios.Polarizing films are fabricated by the traditional method of flowing, and polarizing films with good polarization and transmission are produced. The mechanical capabilities of the polarizing films are analyzed using Marc software. The stress relaxation model and the stretch finite element model of the polarizing films are established, and the stress relaxation phenomenon and the change of the stress with the increase of the stretch ratio are analyzed.These polarizing films are studied by UV-VIS spectrophotometer. The results show that the transmission efficiency and the polarizing coefficient of the polarizing films have increased with the increase of the stretch ratio.The lithography technology of the polarizing films is studied.Two-phase polarizing films are formed of two transmission axises that are perpendicular to each other, and good optical performance is measured, Which are of...