Design of a foveated imaging system based on liquid crystal microlens array

2018 ◽  
Author(s):  
Xingwang Xie ◽  
Wanwan Dai ◽  
Zhaowei Xin ◽  
Dong Wei ◽  
Mingce Chen ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Imaging System ◽  
Microlens Array ◽  
Foveated Imaging

Wide-field-of-view foveated imaging system using a liquid crystal spatial light modulator

2002 ◽  
Author(s):  
David V. Wick ◽  
Ty Martinez ◽  
Jeffrey T. Baker ◽  
Don M. Payne ◽  
Bradley R. Stone ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Spatial Light Modulator ◽  
Imaging System ◽  
Field Of View ◽  
Wide Field ◽  
Light Modulator ◽  
Foveated Imaging ◽  
Wide Field Of View

W-band beam-steerable MEMS-based reflectarray

2011 ◽  
Vol 3 (5) ◽  
pp. 521-532 ◽  
Author(s):  
Simone Montori ◽  
Elisa Chiuppesi ◽  
Paola Farinelli ◽  
Luca Marcaccioli ◽  
Roberto Vincenti Gatti ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Imaging System ◽  
Elementary Cell ◽  
Control Architecture ◽  
Micro Electro Mechanical Systems ◽  
Concealed Weapons ◽  
W Band ◽  
Innovative Solutions ◽  
Wave Imaging ◽  
The University

This paper presents recent advances on reconfigurable reflectarrays at the University of Perugia. In particular, the activities carried out in the framework of the FP7 project ARASCOM (“MEMS and Liquid Crystal based” Agile Reflectarray Antennas for Security and COMmunication). As for ARASCOM outcomes, the purpose of the project is the design of a very large reconfigurable reflectarray controlled with micro-electro-mechanical systems (MEMS) for mm-wave imaging system at 76.5 GHz. A system with sufficient resolution to detect concealed weapons impose challenging requirements on the antenna, which shall be made of hundreds of thousands elements. The problem has been addressed by exploiting some innovative solutions and architectures that will be described in this document. In particular, the dimensioning of the reflectarray, the proposed 1-bit geometry of elementary cell, and the innovative biasing control architecture are reported together with the MEMS design and fabrication and the experimental results of a demonstrating board that validated the adopted procedure.

scholarly journals Dual layer electrode liquid crystal lens for 2D/3D tunable endoscopy imaging system

2016 ◽  
Vol 24 (8) ◽  
pp. 8527 ◽  
Author(s):  
Amir Hassanfiroozi ◽  
Yi-Pai Huang ◽  
Bahram Javidi ◽  
Han-Ping D. Shieh
Keyword(s):  
Liquid Crystal ◽  
Imaging System ◽  
Liquid Crystal Lens

Fabrication of a Liquid Crystal Microlens Array Film with Oligothiophene-Doped Polymerizable Liquid Crystals

2009 ◽  
Vol 511 (1) ◽  
pp. 298/[1768]-308/[1778]
Author(s):  
Motoi Kinoshita ◽  
Tomohiro Kobayashi ◽  
Atsushi Shishido ◽  
Tomiki Ikeda
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystals ◽  
Microlens Array

scholarly journals An electrically tunable imaging system with separable focus and zoom functions using composite liquid crystal lenses

2014 ◽  
Vol 22 (10) ◽  
pp. 11427 ◽  
Author(s):  
Ming-Syuan Chen ◽  
Po-Ju Chen ◽  
Michael Chen ◽  
Yi-Hsin Lin
Keyword(s):  
Liquid Crystal ◽  
Imaging System

scholarly journals Flexible foveated imaging using a single Risley-prism imaging system

2021 ◽  
Author(s):  
feng huang ◽  
He Ren ◽  
Xianyu Wu ◽  
Pengfei Wang
Keyword(s):  
Imaging System ◽  
Foveated Imaging

scholarly journals Miniature Compressive Ultra-spectral Imaging System Utilizing a Single Liquid Crystal Phase Retarder

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Isaac August ◽  
Yaniv Oiknine ◽  
Marwan AbuLeil ◽  
Ibrahim Abdulhalim ◽  
Adrian Stern
Keyword(s):  
Liquid Crystal ◽  
Imaging System ◽  
Spectral Imaging ◽  
Crystal Phase ◽  
Liquid Crystal Phase

Liquid crystal lens with four driving voltages and its applications in imaging system with rectangular aperture

2021 ◽  
Author(s):  
Lvhan Xu ◽  
Yalei Zhang ◽  
Zhiqiang Liu ◽  
Mao Ye
Keyword(s):  
Liquid Crystal ◽  
Aspect Ratio ◽  
Imaging System ◽  
Focal Length ◽  
Rectangular Aperture ◽  
Liquid Crystal Lens ◽  
Four Electrodes

Abstract Liquid crystal lens has the characteristic of variable focal length. Many studies have demonstrated that electronically controlled focusing without mechanical movements can be realized by using liquid crystal lenses in imaging system. In this paper, a four-electrodes liquid crystal lens with a rectangular aperture is applied to focus. The aperture’s aspect ratio of the liquid crystal lens can be designed arbitrarily so that installing it with the periscope lens in phones becomes possible.

scholarly journals Adaptive Focal Length Imaging System using Liquid Crystal Spatial Light Modulator

2016 ◽  
Vol 9 (48) ◽  
Author(s):  
Kunlachat Seniwong Na Ayutthaya ◽  
Pradit Mittrapiyanuruk ◽  
Pakorn Kaewtrakulpong
Keyword(s):  
Liquid Crystal ◽  
Spatial Light Modulator ◽  
Imaging System ◽  
Focal Length ◽  
Light Modulator
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