• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文学位 >Integrated multifunctional reprogrammable MEMS deformable mirror and three-dimensional phase retrieval based adaptive optic system implementations.
【24h】

Integrated multifunctional reprogrammable MEMS deformable mirror and three-dimensional phase retrieval based adaptive optic system implementations.

机译：集成的多功能可重编程MEMS变形镜和基于三维相位检索的自适应光学系统实现。

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

This research presents a fast three-dimensional phase retrieval approach used to perform optical phase modulation through the use of a segmented Micro-Electro-Mechanical Deformable-Mirror (MEMS-DM).; This research demonstrates novel adaptive optic system laser-beam implementations, for beam splitting, beam steering, beam shaping, beam tracking, and aberration correction, using an inherently multifunctional phased array system. Traditional solutions to beam splitting, beam steering, beam shaping (BS3), and beam tracking and aberration correction involve multiple and sometimes costly optical components. For example, beam splitting is normally accomplished with beam splitters, beam steering is normally achieved with gimbaled mechanical devices, and beam shaping is normally done with addressable, polarized, and potentially absorptive devices such as LCDs. In addition, beam tracking and aberration correction techniques require closed loop feedback, which is provided by the closed-loop three-dimensional phase retrieval algorithm implemented in this research.; Using the 3D phase retrieval algorithm with a desired far-field amplitude pattern as a constraint, a segmented wavefront control device is shown to simultaneously perform the aforementioned functions through its inherent reconfigurable operation. The MEMS-DM used is a foundry micro-fabricated device that is attractive for optical phase modulation applications primarily because of its inherent low cost and low driving voltages. The MEMS-DM provides the added advantage of “discrete imaging” versus “continuously moving” imaging systems presented by current technology. The MEMS-DM shapes the beam based on the results of a modified Fienup and Roggemann/Lee phase retrieval algorithm implemented within the system. The optical bench setup and the experimental results for BS3 and beam tracking and aberration correction are presented. Simulations have been developed and presented to represent the optical system and the phase maps, created for the operating MEMS-DM, and the output images. Measured experimental data shows good agreement with model simulations. A comparison between an analog MEMS-DM and a digitally controlled MEMS-DM is presented. Overall, experimental results demonstrate the efficacy of the 3D phase retrieval algorithm and one phase control device in solving multifunctional optics problems normally solved through traditional techniques and multiple systems/devices. This research extends traditional techniques and solves the problem of real-time “continuously moving” imaging and also exploits the capability of MEMS-DMs in the field of Adaptive Optics (AO) through the advancement of classical optical phased array techniques.; Digital designs and controllers are produced for remote serial and parallel port PC control of digital MEMS-DDMs (Digital Deflection Micromirrors) using advanced digital VHSIC Hardware Description Language (VHDL). The digital designs are implemented using Configuration Programmable Logic Devices (CPLDs) and Field Programmable Gate Arrays (FPGAs) and are presented as interim research and design accomplished to support future work towards integrated All-Digital Multi-Chip Modules (MCM) and Application Specific Integrated Circuit (ASIC) AO system designs.
机译：这项研究提出了一种快速的三维相位检索方法，该方法用于通过使用分段式微机电变形镜（MEMS-DM）进行光学相位调制。这项研究演示了使用固有的多功能相控阵系统的新型自适应光学系统激光束实现方案，用于光束分离，光束转向，光束整形，光束跟踪和像差校正。光束分离，光束转向，光束整形（BS 3 ）以及光束跟踪和像差校正的传统解决方案涉及多个光学组件，有时甚至是昂贵的光学组件。例如，通常使用分束器完成光束分离，通常使用万向节机械设备来完成光束转向，通常使用可寻址，偏振和潜在吸收性设备（例如LCD）来完成光束整形。另外，光束跟踪和像差校正技术需要闭环反馈，这是由本研究中实现的闭环三维相位检索算法提供的。使用具有所需远场振幅模式作为约束的3D相位检索算法，分段波前控制设备显示为通过其固有的可重构操作同时执行上述功能。所使用的MEMS-DM是一种铸造微制造设备，主要由于其固有的低成本和低驱动电压而对光学相位调制应用具有吸引力。与当前技术提供的“连续移动”成像系统相比，MEMS-DM具有“离散成像”的额外优势。 MEMS-DM基于系统内实现的改良Fienup和Roggemann / Lee相位检索算法的结果对光束进行整形。给出了BS 3 的光具架设置和实验结果以及光束跟踪和像差校正。已经开发并提供了仿真，以表示为操作MEMS-DM创建的光学系统和相位图以及输出图像。测得的实验数据表明与模型仿真吻合良好。提出了模拟MEMS-DM和数控MEMS-DM之间的比较。总体而言，实验结果证明了3D相位检索算法和一种相位控制设备在解决通常通过传统技术和多种系统/设备解决的多功能光学问题方面的功效。这项研究扩展了传统技术，解决了实时“连续移动”成像的问题，并通过经典光学相控阵技术的发展，利用了MEMS-DM在自适应光学（AO）领域的能力。使用先进的数字VHSIC硬件描述语言（VHDL）生产用于数字MEMS-DDM

著录项

  • 作者

    Rogers, Stanley.;

  • 作者单位

    The University of Dayton.;

  • 授予单位 The University of Dayton.;
  • 学科 Engineering Electronics and Electrical.; Physics Optics.
  • 学位 Ph.D.
  • 年度 2002
  • 页码 254 p.
  • 总页数 254
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 无线电电子学、电信技术;光学;
  • 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