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- W2050131671 abstract "The spatial light modulators based on liquid crystal (LC-SLMs) have found applications in areas like beam shaping, optical tweezers, and microscopy. The use of these devices for pupil engineering has been an active research field. Many experiments with LC-SLMs involve the use of a digital camera, or even an additional LC modulator. Discrepancies in the refreshing rates of the modulator and the camera, or even between two nominally equal modulators, give rise to beating and intensity fluctuations, known as flicker, in the point spread function generated by the engineered pupil. In this paper we present a method for reducing the flicker caused by a liquid crystal on silicon (LCoS) SLM. It consists in reducing the temperature of the LCoS in a controlled form, in order to increase the viscosity of the liquid crystal, and with this reduce the amplitude of the intensity fluctuations due to the refreshing mechanism. We demonstrate that the flicker has been reduced to only the 25% of its initial value, when the LCoS is brought at 0 °C at a given gray level. Additionally, we found that the proposed reduction of temperature does not affect the dynamical range of phase control." @default.
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- W2050131671 date "2011-08-15" @default.
- W2050131671 modified "2023-09-23" @default.
- W2050131671 title "Flicker reduction in an LCoS spatial light modulator" @default.
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- W2050131671 doi "https://doi.org/10.1117/12.903285" @default.
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