• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文学位 >Optical phase aberration generation using a Liquid Crystal Spatial Light Modulator.
【24h】

Optical phase aberration generation using a Liquid Crystal Spatial Light Modulator.

机译：使用液晶空间光调制器产生光学相差。

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

In this dissertation, a Liquid Crystal Spatial Light Modulator is used to simulate optical aberrations in an optical system. Any optical aberration can be simulated through the use of software developed for this project. A new method of simulating atmospheric turbulence is also presented.The Earth's atmosphere is a large, non-linear, non-homogeneous medium that is constantly flowing in a random fashion that affects light as it propagates through it. The Kolmogorov model for atmospheric turbulence is a description of the nature of the wavefront perturbations introduced by the atmosphere and it is one of the most accepted models. It is supported by a variety of experimental measurements and research and is quite widely used in simulations for atmospheric imaging. This model provides a statistical description of how random fluctuations in humidity and temperature affect the refractive index of the atmosphere for imaging through atmospheric turbulence. These refractive index fluctuations in turn affect the propagation of light through the atmosphere. An adaptive optical system can be developed to correct these wavefront perturbations for an optical system. However, prior to deployment, an adaptive optical system requires calibration and full characterization in the laboratory. Creating realistic atmospheric simulations is often expensive and computationally intensive using common techniques. To combat some of these issues often the temporal properties in the simulation are neglected. This dissertation outlines a new method developed for generating atmospheric turbulence and a testbed that simulates its aberrations far more inexpensively and with greater fidelity using a Liquid Crystal Spatial Light Modulator. This system allows the simulation of atmospheric seeing conditions ranging from very poor to very good and different algorithms may be easily employed on the device for comparison. These simulations can be dynamically generated and modified very quickly and easily.Using a Liquid Crystal Spatial Light Modulator to induce aberrations in an imaging system is not limited to simulating atmospheric turbulence. Any turbulence model can be used either statically or dynamically for multiple applications.
机译：本文采用液晶空间光调制器模拟光学系统中的像差。可以通过使用为此项目开发的软件来模拟任何光学像差。还提出了一种模拟大气湍流的新方法。地球大气是一种大型，非线性，非均质的介质，不断以随机的方式流动，影响光在其传播过程中的传播。大气湍流的Kolmogorov模型描述了大气引入的波前扰动的性质，并且是最受接受的模型之一。它得到各种实验测量和研究的支持，并且已广泛用于大气成像的模拟中。该模型提供了有关湿度和温度的随机波动如何影响大气折射率以通过大气湍流成像的统计描述。这些折射率波动进而影响光通过大气的传播。可以开发出一种自适应光学系统来校正光学系统的这些波前扰动。但是，在部署之前，自适应光学系统需要在实验室中进行校准和全面表征。使用常规技术创建逼真的大气模拟通常很昂贵且计算量很大。为了解决其中一些问题，通常会忽略模拟中的时间特性。本文概述了一种用于产生大气湍流的新方法，以及一种使用液晶空间光调制器以更低的成本和更高的保真度模拟其像差的测试平台。该系统可以模拟从非常差到非常好的大气可见条件，并且可以轻松地在设备上采用不同的算法进行比较。这些模拟可以非常快速，轻松地动态生成和修改。使用液晶空间光调制器在成像系统中引起像差不仅限于模拟大气湍流。任何湍流模型都可以静态或动态地用于多个应用程序。

著录项

  • 作者

    Wilcox, Christopher C.;

  • 作者单位

    The University of New Mexico.;

  • 授予单位 The University of New Mexico.;
  • 学科 Engineering Electronics and Electrical.Physics Optics.
  • 学位 Ph.D.
  • 年度 2009
  • 页码 193 p.
  • 总页数 193
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号