Wavefront control using a high-quality nematic liquid crystal spatial light modulator

1995 ◽  
Author(s):  
Gordon D. Love
Keyword(s):  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Spatial Light Modulator ◽  
Light Modulator ◽  
High Quality ◽  
Wavefront Control

Optimal trap velocity in a dynamic holographic optical trap using a nematic liquid crystal spatial light modulator

2022 ◽  
Author(s):  
Karuna Sindhu Malik ◽  
Bosanta Ranjan Boruah
Keyword(s):  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Spatial Light Modulator ◽  
Optical Trap ◽  
Optical Element ◽  
Optical Traps ◽  
Light Modulator ◽  
Step Size ◽  
Microscopic Object ◽  
Optimal Velocity

Abstract A dynamic holographic optical trap uses a dynamic diffractive optical element such as a liquid crystal spatial light modulator to realize one or more optical traps with independent controls. Such holographic optical traps provide a number of flexibilities and conveniences useful in various applications. One key requirement for such a trap is the ability to move the trapped microscopic object from one point to the other with the optimal velocity. In this paper we develop a nematic liquid crystal spatial light modulator based holographic optical trap and experimentally investigate the optimal velocity feasible for trapped beads of different sizes, in such a trap. Our results show that the achievable velocity of the trapped bead is a function of size of the bead, step size, interval between two steps and power carried by the laser beam. We observe that the refresh rate of a nematic liquid crystal spatial light modulator is sufficient to achieve an optimal velocity approaching the theoretical limit in the respective holographic trap for beads with radius larger than the wavelength of light.

Wavefront control with a spatial light modulator containing dual-frequency liquid crystal

2004 ◽  
Author(s):  
Dong-Feng Gu ◽  
Bruce Winker ◽  
Bing Wen ◽  
Don Taber ◽  
Andrew Brackley ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Spatial Light Modulator ◽  
Dual Frequency ◽  
Light Modulator ◽  
Wavefront Control

High quality beam shaping by square soft-edge diaphragm combined with liquid crystal spatial light modulator

2010 ◽  
Vol 8 (2) ◽  
pp. 134-137 ◽  
Author(s):  
麻云凤 Yunfeng Ma ◽  
樊仲维 Zhongwei Fan ◽  
邱基斯 Jisi Qiu ◽  
冯承勇 Chengyong Feng ◽  
赵天卓 Tianzhuo Zhao ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Spatial Light Modulator ◽  
Beam Shaping ◽  
Light Modulator ◽  
High Quality ◽  
Soft Edge
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