Optimizing Approach of Wavefront Aberration in the Recording of Holographic Lens Based on Spatial Light Modulator

2014 ◽  
Vol 41 (2) ◽  
pp. 0209023 ◽  
Author(s):  
韩剑 Han Jian ◽  
刘娟 Liu Juan ◽  
刘冬梅 Liu Dongmei ◽  
胡滨 Hu Bin ◽  
王涌天 Wang Yongtian
Keyword(s):  
Spatial Light Modulator ◽  
Wavefront Aberration ◽  
Light Modulator ◽  
Holographic Lens

High-Resolution Correction of Arbitrary Wavefront Aberration Using Liquid Crystal Spatial Light Modulator

2011 ◽  
Vol 121-126 ◽  
pp. 877-881
Author(s):  
Hong Xin Zhang ◽  
Xiao Xi Xu
Keyword(s):  
Liquid Crystal ◽  
High Resolution ◽  
Spatial Light Modulator ◽  
Low Cost ◽  
Phase Conjugation ◽  
Astronomical Observation ◽  
Wavefront Aberration ◽  
Strehl Ratio ◽  
Light Modulator ◽  
Wavefront Correction

Wavefront correction plays significant role in some fields like astronomical observation, laser processing and medical imaging, etc. Liquid crystal spatial light modulator ( LC SLM) is an ideal device for high-resolution wavefront correction because of its low cost, low consumption, large number of pixels and independent programming control of each unit. It is researched experimentally that LC SLM is used as a wavefront correction device and corrects arbitrary wavefront aberration. Wavefront correction is performed based on phase conjugation and periodic phase modulation with modulo-2π. The experimental results show that the PV value of the irregular wavefront aberration is 1.56λ, RMS value is 0.25 and Strehl ratio is 0.08 before correction, but the PV value of the residual aberration is reduced to 0.26λ, RMS value is 0.02 and Strehl ratio is increased to 0.97 which is approximated diffraction limit after correction. It is proved to be feasible and effective that LC SLM is used to the high-precision and high-resolution wavefront correction.

scholarly journals Wavefront Aberration Sensor Based on a Multichannel Diffractive Optical Element

Sensors ◽  
2020 ◽  
Vol 20 (14) ◽  
pp. 3850 ◽  
Author(s):  
Svetlana N. Khonina ◽  
Sergey V. Karpeev ◽  
Alexey P. Porfirev
Keyword(s):  
Spatial Light Modulator ◽  
Optical Filter ◽  
Optical Element ◽  
Diffractive Optical Element ◽  
Fine Tuning ◽  
Wavefront Aberration ◽  
Zernike Polynomials ◽  
Light Modulator ◽  
New Type

We propose a new type of a wavefront aberration sensor, that is, a Zernike matched multichannel diffractive optical filter, which performs consistent filtering of phase distributions corresponding to Zernike polynomials. The sensitivity of the new sensor is theoretically estimated. Based on the theory, we develop recommendations for its application. Test wavefronts formed using a spatial light modulator are experimentally investigated. The applicability of the new sensor for the fine-tuning of a laser collimator is assessed.

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