Flicker in a twisted nematic spatial light modulator

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• 作者：Yuliana Calderó ; n-Hermosillop>ap> ; Jorge Garcí ; a-Má ; rquezp>ap>p> ; p>p>dp>p> ; p>p>jgarciam@cio.mxp>p> ; p>p>jorge.garcia.marquez@gmail.comp> ; Rafael Espinosa-Lunap>ap> ; No&eacute ; Alcalá ; Ochoap>ap> ; Ví ; ctor Ló ; pezp>bp>p> ; p>p>cp> ; Alberto Aguilarp>ap> ; Enrique No&eacute ; -Ariasp>ap> ; Yasser Alaylip>dp>
• 关键词：Spatial light modulators ; Liquid-crystal devices ; Phase measurement ; Phase shift interferometry ; Polarimetry
• 刊名：Optics and Lasers in Engineering
• 出版年：2013
• 出版时间：June, 2013
• 年：2013
• 卷：51
• 期：6
• 页码：741-748
• 全文大小：743 K

文摘

Liquid Crystal on Silicon (LCoS) Spatial Light Modulators (SLM) are widely used for their capability to control beams howbeit fluctuations in phase and amplitude. It is then necessary to understand the negative effects of these fluctuations, also known as flicker, and the means to mitigate them. The flicker is observed either as high frequency variations of polarization, attenuation or high phase fluctuations on the wave front modulated by the LCoS device. Here, we compare the flicker behavior in a twisted nematic (TN) LCoS-SLM for different polarization schemes and temperatures. The quantitative evaluation shows that flicker is effectively reduced only by chilling the LCoS panel to temperatures just below 0 ¡ãC but, the LCoS modulation capability is also affected.