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首页> 外文学位 >Characterization of nanoscale features using apertureless near -field scanning optical microscopy and development of a prototype commercial inkjet analysis instrument.
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Characterization of nanoscale features using apertureless near -field scanning optical microscopy and development of a prototype commercial inkjet analysis instrument.

机译：使用无孔近场扫描光学显微镜对纳米级特征进行表征，并开发出原型商用喷墨分析仪器。

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摘要

An apertureless near-field optical instrument uses any object of subwavelength dimensions to scatter light at a small distance from a surface such that the optical interaction between the object and the surface is local. That local interaction yields subwavelength optical resolution. A reflection-mode apertureless near-field optical microscope (ANSOM) has been developed for microscopy, fluorescence spectroscopy, polarization studies, normal-force studies, and near-field optical studies. Results show that the resolution of near-field optical images can be higher than that of the simultaneous topographical image, with subwavelength optical resolution better than 50 nm. A novel study of polarization contrast was conducted with the ANSOM; distinctive optical images were obtained with different light polarizations. A novel method to remove feedback artifacts from the near-field optical image was developed. Optical and pecking amplitude measurements as the probe tip approaches the sample surface have shown insight into the near-field optical regime as well as normal-force interactions. Preliminary fluorescence spectroscopy has demonstrated that the ANSOM is a promising characterization tool for spectroscopic applications. Design, construction, evaluation, and application of the instrument are described.;A prototype of a commerical ink-jet printing instrument has been developed for the measurement of ink surface position in an orifice of a drop-on-demand printer head as a function of time immediately following the formation of a drop. The development of this instrument involves the design, construction, and calibration of electronic, mechanical, and optical components. The prototype instrument consists of an ink delivery system and device mount, a laser, an optical beam deflection (OBD) system, an optical system for jet-shadow detection, position-sensing detectors with associated electronics, a high sample rate digitizing signal analyzer to record transient signals, and a computer running control software. Real-time ink-jet meniscus oscillations have been measured, providing information concerning the effects of material and dynamic fluid parameters on drop formation under operational conditions. A proposed commercial instrument is described.
机译：无孔近场光学仪器使用任何亚波长尺寸的物体将光散射到距表面一小段距离的位置，从而使该物体与表面之间的光学相互作用是局部的。局部相互作用产生亚波长光学分辨率。反射模式无孔近场光学显微镜（ANSOM）已开发用于显微镜，荧光光谱，偏振研究，法向力研究和近场光学研究。结果表明，近场光学图像的分辨率可以高于同时形貌图像，亚波长光学分辨率优于50 nm。用ANSOM进行了新的偏振对比研究。获得了具有不同光偏振的独特光学图像。开发了一种从近场光学图像中去除反馈伪像的新方法。探头尖端接近样品表面时的光学和啄形振幅测量结果显示出对近场光学状态以及法向力相互作用的洞察力。初步的荧光光谱表明，ANSOM是一种有前途的光谱分析工具。描述了该仪器的设计，构造，评估和应用。；已经开发出一种商用喷墨打印仪器的原型，用于测量按需滴落式打印头的孔中的油墨表面位置。时间紧接着形成一滴。该仪器的开发涉及电子，机械和光学组件的设计，构造和校准。原型仪器包括墨水传输系统和设备支架，激光器，光束偏转（OBD）系统，用于喷射阴影检测的光学系统，带有相关电子设备的位置感应检测器，高采样率数字化信号分析仪，记录瞬态信号，以及运行控制软件的计算机。已测量了实时喷墨弯液面的振荡，可提供有关材料和动态流体参数对操作条件下液滴形成的影响的信息。描述了提出的商业仪器。

著录项

  • 作者

    Farahi, R. H.;

  • 作者单位

    The University of Texas at Dallas.;

  • 授予单位 The University of Texas at Dallas.;
  • 学科 Engineering Electronics and Electrical.;Physics Optics.
  • 学位 Ph.D.
  • 年度 2000
  • 页码 330 p.
  • 总页数 330
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 康复医学;
  • 关键词

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