Flicker in a twisted nematic spatial light modulator

  • Calderón-Hermosillo, Yuliana Garcia-Marquez J
  • Espinosa-Luna R
  • Alcalá Ochoa N
 et al. 
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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° C but; the LCoS modulation capability is also affected.

Author-supplied keywords

  • Spatial light modulators
  • ellipsometry and polarimetry.
  • liquid-crystal devices
  • phase measurement
  • phase shift interferometry

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  • Jorge Calderón-Hermosillo, Yuliana Garcia-Marquez

  • Rafael Espinosa-Luna

  • Noé Alcalá Ochoa

  • Victor Lopez

  • Alberto Aguilar

  • Enrique Noé-Arias

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