Design of an Optical System for Phase Retrieval based on a Spatial Light Modulator

2010 ◽  
Author(s):  
Claas Falldorf ◽  
Mostafa Agour ◽  
Christoph von Kopylow ◽  
Ralf B. Bergmann ◽  
Pramod K. Rastogi ◽  
...  
Keyword(s):  
Optical System ◽  
Spatial Light Modulator ◽  
Phase Retrieval ◽  
Light Modulator

Pseudo-Color Coded Optical System Based on the Spatial Light Modulator and Charge-Coupled Device

2012 ◽  
Author(s):  
S. N. Zhao ◽  
H. Chang ◽  
J. Wei ◽  
Z. Wei
Keyword(s):  
Real Time ◽  
Optical System ◽  
Spatial Light Modulator ◽  
Processing System ◽  
Optical Processing ◽  
Gray Scale ◽  
Light Modulator ◽  
Time Modulation ◽  
Gray Scale Image ◽  
Pseudo Color

A new pseudo-color coded optical system based on the liquid crystal spatial light modulator (LC-SLM) and a digital camera (CCD) is proposed. The SLM is used to replace the holographic grating with gray-scale image information, a gray-scale image in real-time modulation methods is proposed by synthesizing phase hologram and Ronchi grating, combined with the 4f coherent optical processing system and spatial filtering. For the high resolution gray image processed with existing digital pseudo-color method, the color sensitivity is low, algorithm is very complex. For traditional optical pseudo-color method, the gray scale image needs chemical pretreatment. The process is complex and time-consuming, and the real-time modulation could not be achieved. Our new method has enhanced the flexibility and adaptability of the optical pseudo-color, and give full play to the high sensitivity, high-capacity, rich colors and other features of the optical processing mode. At the same time, it overcomes the disadvantages of pure optical system which could not perform real-time processing. Therefore, it can be widely used in the field of remote sensing, biomedical, environmental monitoring, public security and criminal investigation, etc.

Cross-talk compensation of a spatial light modulator for iterative phase retrieval applications

2016 ◽  
Vol 55 (4) ◽  
pp. 802 ◽  
Author(s):  
Pierre Gemayel ◽  
Bruno Colicchio ◽  
Alain Dieterlen ◽  
Pierre Ambs
Keyword(s):  
Cross Talk ◽  
Spatial Light Modulator ◽  
Phase Retrieval ◽  
Light Modulator

scholarly journals Generation of arbitrary axisymmetrically polarized pulses by using the combination of 4-f spatial light modulator and common-path optical system

2018 ◽  
Vol 26 (3) ◽  
pp. 2584 ◽  
Author(s):  
Masato Suzuki ◽  
Keisaku Yamane ◽  
Moritsugu Sakamoto ◽  
Kazuhiko Oka ◽  
Yasunori Toda ◽  
...  
Keyword(s):  
Optical System ◽  
Spatial Light Modulator ◽  
Light Modulator ◽  
Common Path

Characterization of a spatial light modulator and its application in phase retrieval

2009 ◽  
Vol 48 (20) ◽  
pp. 4003 ◽  
Author(s):  
C. Kohler ◽  
F. Zhang ◽  
Wolfgang Osten
Keyword(s):  
Spatial Light Modulator ◽  
Phase Retrieval ◽  
Light Modulator

scholarly journals An interference scheme for generating inhomogeneously polarized laser radiation using a spatial light modulator

2020 ◽  
Vol 44 (2) ◽  
pp. 214-218 ◽  
Author(s):  
S.V. Karpeev ◽  
V.V. Podlipnov ◽  
A.M. Algubili
Keyword(s):  
Laser Radiation ◽  
Phase Transformations ◽  
Optical System ◽  
Spatial Light Modulator ◽  
Laser Beams ◽  
Light Modulator ◽  
Optical Setup ◽  
Linearly Polarized ◽  
Polarization Phase ◽  
Cylindrical Vector Beam

An optical system for converting linearly polarized laser beams into cylindrical vector beams is developed and experimentally investigated. The scheme is based on the coherent addition of mode beams using a Mach-Zehnder interferometer. The simplicity and versatility of the optical setup is achieved through the use of different sections in the area of the spatial light modulator for the si-multaneous generation of two spatially separated given mode beams. Each of the beams then propagates in one of the arms of the interferometer and undergoes the necessary polarization-phase transformations to obtain a cylindrical vector beam after the addition of mode beams.

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.

The effect of misalignment in phase retrieval based on a spatial light modulator

2011 ◽  
Author(s):  
Mostafa Agour ◽  
Claas Falldorf ◽  
Christoph von Kopylow ◽  
Ralf B. Bergmann
Keyword(s):  
Spatial Light Modulator ◽  
Phase Retrieval ◽  
Light Modulator

Enhanced intensity variation for multiple-plane phase retrieval using a spatial light modulator as a convenient tunable diffuser

2016 ◽  
Vol 41 (10) ◽  
pp. 2161 ◽  
Author(s):  
Percival F. Almoro ◽  
Quang Duc Pham ◽  
David Ignacio Serrano-Garcia ◽  
Satoshi Hasegawa ◽  
Yoshio Hayasaki ◽  
...  
Keyword(s):  
Spatial Light Modulator ◽  
Phase Retrieval ◽  
Intensity Variation ◽  
Light Modulator ◽  
Multiple Plane
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