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1. The generalized phase modulation optimization method for LCOS with an arbitrary twisted angle used in wave-front correction | |||
LIU Yongjun,HU Lifa | |||
Physics 07 September 2011 | |||
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Abstract:Based on the 2×2 Jones matrix method, we investigated theoretically the phase modulation characteristics of a reflective liquid crystal on silicon (LCOS) device with any twisted angles. The optimized range of phase-only modulation was obtained with the reflectivity variation lower than 10%. In addition, phase modulation characteristic of the LCOS with the 45-degree's LC twisted angle on a Zygo interferometer was presented. Based on the optimized phase modulation result for the LCOS, the experiment of the real-time closed loop correction for the dynamic aberrated wave-front was conducted to validate our theoretical simulation. The results show that on the area of 19.5 mm×14.6mm the peak to valley (PV) value is up to 0.082λ, RMS up to 0.015λ, and the closed loop bandwidth is 4Hz. | |||
TO cite this article:LIU Yongjun,HU Lifa. The generalized phase modulation optimization method for LCOS with an arbitrary twisted angle used in wave-front correction[OL].[ 7 September 2011] http://en.paper.edu.cn/en_releasepaper/content/4442370 |
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