A new method for obtaining higher-order optical correlation/convolution using a spatial light modulator with extended phase modulation

2021 ◽  
Author(s):  
Ignacio Moreno Soriano ◽  
Jeffrey A. Davis ◽  
Benjamin K. Gutierrez ◽  
María del Mar Sánchez-López ◽  
Don M. Cottrell
Keyword(s):  
Phase Modulation ◽  
Spatial Light Modulator ◽  
Higher Order ◽  
New Method ◽  
Light Modulator ◽  
Extended Phase ◽  
Optical Correlation

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.

Optical attenuator based on phase modulation of a spatial light modulator

2015 ◽  
Vol 13 (8) ◽  
pp. 082301-82304 ◽  
Author(s):  
Chao Liu Chao Liu ◽  
Di Wang Di Wang ◽  
Lixiao Yao Lixiao Yao ◽  
Lei Li Lei Li ◽  
Qionghua Wang Qionghua Wang
Keyword(s):  
Phase Modulation ◽  
Spatial Light Modulator ◽  
Light Modulator

Reflective magneto-optic spatial light modulator (R-MOSLM) device for optical correlation

1995 ◽  
Author(s):  
James P. Karins ◽  
John R. Lucas ◽  
Theodore R. Maki ◽  
Niels Jacksen ◽  
Mark K. Preis
Keyword(s):  
Spatial Light Modulator ◽  
Light Modulator ◽  
Optical Correlation ◽  
Magneto Optic

scholarly journals Study on Aided Optical Alignment by Programmable Spots Array Generated by Off-Axis Parabolic Phase Based on LCoS-SLM

2020 ◽  
Vol 10 (23) ◽  
pp. 8382
Author(s):  
Zhen Zeng ◽  
Zexiao Li ◽  
Fengzhou Fang ◽  
Xiaodong Zhang
Keyword(s):  
Liquid Crystal ◽  
Optical System ◽  
Phase Modulation ◽  
Spatial Light Modulator ◽  
Incident Light ◽  
Alignment Method ◽  
Light Modulator ◽  
Optical Alignment ◽  
Liquid Crystal On Silicon

We present an aided optical alignment method using the liquid crystal on silicon spatial light modulator (LCoS-SLM). An optical system composed of an interferometer and an LCoS-SLM was established to verify the effectiveness of the method. The system was also calibrated to solve the phase modulation nonlinear and nonuniformity problem for better performance of LCoS-SLM as an easily programmable phase compensator. The LCoS-SLM could modulate the phase of incident light precisely to generate an accurate phase desired to achieve a virtual off-axis parabolic phase to generate light spots array. Finally, the 2 × 2 light spots array generated by the optical system was used to verify its potential in optical alignment.

Sign in / Sign up

Export Citation Format

Share Document