Flicker in a twisted nematic spatial light modulator
2013; Elsevier BV; Volume: 51; Issue: 6 Linguagem: Inglês
10.1016/j.optlaseng.2013.01.013
ISSN1873-0302
AutoresYuliana Calderón-Hermosillo, Jorge García-Márquez, Rafael Espinosa-Luna, Noé Alcalá Ochoa, Víctor M. López, Alberto Aguilar, E. Noé-Arias, Yasser Alayli,
Tópico(s)Advanced Optical Imaging Technologies
ResumoLiquid 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.
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