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Electrical dependencies of optical modulation capabilities in digitally addressed parallel aligned liquid crystal on silicon devices

机译：硅器件上数字寻址的平行取向液晶中光学调制功能的电依赖性

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摘要

Parallel aligned liquid crystal on silicon (PA-LCoS) displays have found wide acceptance in applications requiring phase-only modulation. Among LCoS devices, and PA-LCoS as a specific case, digital addressing has become a very common technology. In principle, modern digital technology provides some benefits with respect to analog addressing such as reduced interpixel cross-talk, lower power consumption and supply voltage, gray level scale repeatability, high programmability, and noise robustness. However, there are also some degradating issues, such as flicker, which may be enhanced. We analyze the characteristics of the digital pulse width modulated voltage signals in relation to their effect on the optical modulation capabilities of LCoS displays. We apply calibration techniques developed in our laboratory, basically the classical linear polarimeter extended to take into account the existence of flicker. Various digital sequence formats are discussed, focusing the analysis on the variations in the magnitude of the applied voltages across the LC layer. From this analysis, we obtain how to amplify the retardance dynamic range and how to enhance linearity in the device without enhancing flicker and without diminishing the number of available quantization levels. Electrical configurations intended for phase-only and intensity modulation regimes, useful in diffractive optics, are given.
机译：硅上平行排列液晶（PA-LCoS）显示器已在要求仅相位调制的应用中得到广泛认可。在LCoS设备以及特定情况下的PA-LCoS中，数字寻址已成为一种非常普遍的技术。原则上，现代数字技术在模拟寻址方面提供了一些好处，例如减少了像素间串扰，降低了功耗和电源电压，灰度级可重复性，高可编程性和噪声鲁棒性。但是，还有一些性能下降的问题，例如闪烁，可能会得到增强。我们分析了数字脉冲宽度调制电压信号的特性及其对LCoS显示器的光学调制能力的影响。我们应用在实验室中开发的校准技术，基本上将经典的线性旋光仪扩展到考虑到闪烁的存在。讨论了各种数字序列格式，将分析重点放在整个LC层上施加电压的大小变化上。从该分析中，我们获得了如何在不增加闪烁和不减少可用量化级数量的情况下，扩大延迟动态范围以及如何增强器件的线性度。给出了仅用于相位和强度调制方案的电气配置，可用于衍射光学。

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  • 来源
    《Optical engineering》 |2014年第6期|067104.1-067104.9|共9页
  • 作者

    Francisco Javier Martinez; Andres Marquez; Sergi Gallego; Manuel Ortuno; Jorge Frances; Augusto Belendez; Inmaculada Pascual;

  • 作者单位

    Universidad de Alicante, Dept. de Fisica, Ing. de Sistemas y T. Senal, Ap. 99, Alicante E-03080, Spain,Universidad de Alicante, I.U. Fisica Aplicada a las Ciencias y las Tecnologias, Ap. 99, Alicante E-03080, Spain;

    Universidad de Alicante, Dept. de Fisica, Ing. de Sistemas y T. Senal, Ap. 99, Alicante E-03080, Spain,Universidad de Alicante, I.U. Fisica Aplicada a las Ciencias y las Tecnologias, Ap. 99, Alicante E-03080, Spain;

    Universidad de Alicante, Dept. de Fisica, Ing. de Sistemas y T. Senal, Ap. 99, Alicante E-03080, Spain,Universidad de Alicante, I.U. Fisica Aplicada a las Ciencias y las Tecnologias, Ap. 99, Alicante E-03080, Spain;

    Universidad de Alicante, Dept. de Fisica, Ing. de Sistemas y T. Senal, Ap. 99, Alicante E-03080, Spain,Universidad de Alicante, I.U. Fisica Aplicada a las Ciencias y las Tecnologias, Ap. 99, Alicante E-03080, Spain;

    Universidad de Alicante, Dept. de Fisica, Ing. de Sistemas y T. Senal, Ap. 99, Alicante E-03080, Spain,Universidad de Alicante, I.U. Fisica Aplicada a las Ciencias y las Tecnologias, Ap. 99, Alicante E-03080, Spain;

    Universidad de Alicante, Dept. de Fisica, Ing. de Sistemas y T. Senal, Ap. 99, Alicante E-03080, Spain,Universidad de Alicante, I.U. Fisica Aplicada a las Ciencias y las Tecnologias, Ap. 99, Alicante E-03080, Spain;

    Universidad de Alicante, I.U. Fisica Aplicada a las Ciencias y las Tecnologias, Ap. 99, Alicante E-03080, Spain,Universidad de Alicante, Dept. de Optica, Farmacologia y Anatomia, Ap. 99, Alicante E-03080, Spain;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    liquid crystal on silicon displays; parallel aligned; retardance measurement; phase-only modulation; spatial light modulation; flicker; diffractive optics; pulse width modulation;

    机译：硅显示器上的液晶;平行排列延迟测量;纯相位调制;空间光调制;闪烁;衍射光学脉冲宽度调制;

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