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液晶波前校正器是一种对光波前进行调制的光学元件,具有像素密度高、可靠性好、高精度等技术优点,可用于光束波前整形、光信息处理、光束变换等,具有非常大的应用潜力和广阔的应用前景.当液晶波前校正器应用于光学系统时,大多数情况下均要求它具有快速响应性能,甚至要到1 ms量级;此外,要求校正器必须具有特定的调制量.例如,当在1λ调制量内实施响应时,现有的在售液晶波前校正器的响应速度较慢,通常大于10 ms,阻碍了校正器的进一步应用.对于液晶波前校正器,其响应速度的影响因素主要有两个:液晶材料参数和器件制备参数.针对以上问题,首先概述了本研究组在高双折射率(Δn)、低黏度快速响应液晶材料领域的研究进展;其次介绍了我们在器件参数优化及驱动方式研究中提高其响应速度的研究进展.基于上述研究工作,目前液晶波前校正器的响应速度达亚毫秒量级,这将大幅度提升它在应用光学领域的实用化水平,并将拓展其应用范围.
The liquid crystal wavefront corrector is an optical element that modulates the light wavefront. It has the advantages of high pixel density, good reliability and high precision. It can be used in wavefront shaping, optical information processing, beam transformation, etc., and has a very large The application of the potential and broad prospects.When the liquid crystal wavefront corrector used in optical systems, in most cases require it to have fast response performance, even to the order of 1 ms; In addition, the corrector must be required to have a specific Modulation For example, the existing on-market liquid crystal wavefront correctors respond less slowly, typically greater than 10 ms, for example, when implemented in a 1 lambda modulation, impeding further use of the corrector.For a liquid crystal wavefront corrector , There are mainly two factors that affect the response speed: liquid crystal material parameters and device fabrication parameters.According to the above problems, the research progress of this research group in the fields of high birefringence (Δn) and low viscosity fast response liquid crystal materials Secondly, we introduce the research progress on how to improve the response speed of the device parameter optimization and driving method.Based on the above research work, the response speed of the liquid crystal wavefront corrector Dexia milliseconds, which will greatly enhance the level of its practical application in the field of optics, and will expand its range of applications.