Laser Scanning Liquid Crystal Blazed Grating Design And Research

Blazed grating can concentrate beam energy to a specific order, but its grating constant and the blaze angle will be determined after the blazed grating was made. With the liquid crystal characteristics that the optical properties were changeable under the electric field, liquid crystal blazed grating could flexibility change the grating periods and blaze angles by programmed control. With beam scanning technology,it was expected to become a small, light weight, low power consumption, no mechanical rotation, fast response light beam scanner, and can be used in optical switching, projection displays, optical communication, optical processing, target detection, laser radar, wide area. However, because of restrictions on the level of the device manufacturing process, the current multi-national research in theoretical, to study on the liquid crystal blazed grating fabrication process is very important.This relies on specific research projects, for liquid crystal blazed grating work carried out as follows:1) Created and analyzed theoretical modelsBased on diffraction optics and Binary optics theory, combined with the continuous elastic theory of liquid crystal and electrically controlled birefringence effect of liquid crystal blazed grating, a theoretical model was established to analyze the deflection characteristics of liquid crystal blazed grating and the diffraction efficiency;2) Developed implementation plansLiquid crystal blazed grating design elements were analyzed; a possible solution was generated according to the specific requirements and technical indicators; a clear direction for the device was developed;3) Key production process and its implementationSuitable processing means were chosen for the key device production process, according to the theoretical guidance; the appropriate process parameters were got through the experimental study, and the level of production process were improved by experience were constantly summed up; the problems that may be encountered in practice were in-depth study and exploration, and strive to produce the device consistent with the design;4) Tests of device results and performancesFinished devices were tested to verify the accuracy of the theoretical model and the reliability of the device production; the level of the device manufacturing process was quantitative appraised to guide the direction of manufacturing process optimization;5) Proposed optimization schemeAccording to the test results, possible problems were analyzed; optimal solution to the problem was proposed for the basis of continuously improvement of the devices.