scholarly journals Realization of hybrid method of modulation in liquid crystal light modulator for optical holographic memory

2012 ◽  
Vol 12 (9) ◽  
Author(s):  
Sergey Odinokov ◽  
Nina Verenikina ◽  
Dmitri Lushnikov ◽  
Vladimir Markin ◽  
Alexander Betin
Keyword(s):  
Liquid Crystal ◽  
Hybrid Method ◽  
Light Modulator ◽  
Holographic Memory

128 x 128 analog liquid crystal spatial light modulator

1995 ◽  
Author(s):  
Steven A. Serati ◽  
Gary D. Sharp ◽  
Roylnn A. Serati ◽  
Douglas J. McKnight ◽  
Jay E. Stockley
Keyword(s):  
Liquid Crystal ◽  
Spatial Light Modulator ◽  
Light Modulator

Hyperresolving phase-only filters with an optically addressable liquid crystal spatial light modulator

Micron ◽  
2003 ◽  
Vol 34 (6-7) ◽  
pp. 327-332 ◽  
Author(s):  
J. McOrist ◽  
M.D. Sharma ◽  
C.J.R. Sheppard ◽  
E. West ◽  
K. Matsuda
Keyword(s):  
Liquid Crystal ◽  
Spatial Light Modulator ◽  
Light Modulator

scholarly journals Phase Compensation of the Non-Uniformity of the Liquid Crystal on Silicon Spatial Light Modulator at Pixel Level

Sensors ◽  
2021 ◽  
Vol 21 (3) ◽  
pp. 967
Author(s):  
Zhen Zeng ◽  
Zexiao Li ◽  
Fengzhou Fang ◽  
Xiaodong Zhang
Keyword(s):  
Liquid Crystal ◽  
Phase Modulation ◽  
Spatial Light Modulator ◽  
Characteristic Curve ◽  
Physical Structure ◽  
Measuring System ◽  
Light Modulator ◽  
Phase Compensation ◽  
Modulation Characteristic ◽  
Liquid Crystal On Silicon

Phase compensation is a critical step for the optical measuring system using spatial light modulator (SLM). The wavefront distortion from SLM is mainly caused by the phase modulation non-linearity and non-uniformity of SLM’s physical structure and environmental conditions. A phase modulation characteristic calibration and compensation method for liquid crystal on silicon spatial light modulator (LCoS-SLM) with a Twyman-Green interferometer is illustrated in this study. A method using two sequences of phase maps is proposed to calibrate the non-uniformity character over the whole aperture of LCoS-SLM at pixel level. A phase compensation matrix is calculated to correct the actual phase modulation of the LCoS-SLM and ensure that the designed wavefront could be achieved. Compared with previously known compensation methods, the proposed method could obtain the phase modulation characteristic curve of each pixel on the LCoS-SLM, rather than a mono look-up table (LUT) curve or multi-LUT curves corresponding to an array of blocks over the whole aperture of the LCoS-SLM. The experiment results show that the phase compensation precision could reach a peak-valley value of 0.061λ in wavefront and this method can be applied in generating freeform wave front for precise optical performance.

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