scholarly journals Liquid-crystal micropolarimeter array for full Stokes polarization imaging in visible spectrum

2010 ◽  
Vol 18 (17) ◽  
pp. 17776 ◽  
Author(s):  
Xiaojin Zhao ◽  
Amine Bermak ◽  
Farid Boussaid ◽  
Vladimir G. Chigrinov
Keyword(s):  
Liquid Crystal ◽  
Visible Spectrum ◽  
Polarization Imaging

High-resolution photoaligned liquid-crystal micropolarizer array for polarization imaging in visible spectrum

2009 ◽  
Vol 34 (23) ◽  
pp. 3619 ◽  
Author(s):  
Xiaojin Zhao ◽  
Amine Bermak ◽  
Farid Boussaid ◽  
Tao Du ◽  
Vladimir G. Chigrinov
Keyword(s):  
Liquid Crystal ◽  
High Resolution ◽  
Visible Spectrum ◽  
Polarization Imaging

scholarly journals Liquid Crystal Spatial Light Modulator with Optimized Phase Modulation Ranges to Display Multiorder Diffractive Elements

2019 ◽  
Vol 9 (13) ◽  
pp. 2592 ◽  
Author(s):  
Elisabet Pérez-Cabré ◽  
María Sagrario Millán
Keyword(s):  
Liquid Crystal ◽  
Phase Modulation ◽  
Spatial Light Modulator ◽  
Visible Spectrum ◽  
Chromatic Aberration ◽  
Light Modulator ◽  
Optical Elements ◽  
First Order ◽  
Large Phase ◽  
Liquid Crystal On Silicon

A liquid crystal on silicon spatial light modulator (LCoS SLM) with large phase modulation has been thoroughly characterized to operate optimally with several linear phase modulation ranges (π, 2π, 3π, 4π, 6π, and 8π) for an intermediate wavelength of the visible spectrum (λG = 530 nm). For each range, the device response was also measured for two additional wavelengths at the blue and red extremes of the visible spectrum (λB = 476 nm and λR = 647 nm). Multiorder diffractive optical elements, displayed on the LCoS SLM with the appropriate phase modulation range, allowed us to deal with some widely known encoding issues of conventional first-order diffractive lenses such as undersampling and longitudinal chromatic aberration. We designed an achromatic multiorder lens and implemented it experimentally on the SLM. As a result, the residual chromatic aberration reduces to one-third that of the chromatic aberration of a conventional first-order diffractive lens.

Full-Stokes polarization imaging based on liquid crystal variable retarders and metallic nanograting arrays

2019 ◽  
Vol 53 (1) ◽  
pp. 015112
Author(s):  
Canhua Xu ◽  
Jing Ma ◽  
Chaozhen Ke ◽  
Yantang Huang ◽  
Zhiping Zeng ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Polarization Imaging

LIQUID CRYSTAL BASED ROTATING ORTHOGONAL POLARIZATION IMAGING SYSTEM

2009 ◽  
Vol 02 (03) ◽  
pp. 245-251 ◽  
Author(s):  
QUN ZHU ◽  
IAN M. STOCKFORD ◽  
JOHN A. CROWE ◽  
STEPHEN P. MORGAN
Keyword(s):  
Liquid Crystal ◽  
Imaging System ◽  
Polarization State ◽  
Ease Of Use ◽  
Orthogonal Polarization ◽  
Clinical Use ◽  
Scattering Medium ◽  
Scattering Media ◽  
Polarization Imaging ◽  
Manual Rotation

Rotating orthogonal polarization imaging provides images of the polarization properties of scattering media which are free from surface reflections. Previously the technique has been demonstrated using manually rotated Glan–Thompson polarizers to control and analyze the polarization state of the light entering and emerging from the tissue. This paper describes a system that performs these functions using liquid crystal retarders. The system is tested using a polarizing target embedded within a scattering medium and is compared with Monte Carlo simulations. The results compare well with those obtained with manual rotation of polarizers. The liquid crystal based approach has advantages over the previous system in terms of ease of use, speed, and repeatability and is therefore an important step towards taking the technique into routine clinical use.

A liquid crystal tunable polarization filters for polarization imaging

2008 ◽  
Author(s):  
Dong-Feng Gu ◽  
Bruce Winker ◽  
Bing Wen ◽  
John Mansell ◽  
Karen Zachery ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Polarization Imaging

scholarly journals 4-domain twisted liquid crystal micropolarizer array for visible linear polarization imaging

2021 ◽  
Author(s):  
Shiyuan Zhang ◽  
Chang Liu ◽  
Zijun Sun ◽  
Quanquan Mu ◽  
Juan Campos Coloma ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Linear Polarization ◽  
Polarization Imaging

scholarly journals Polarization Imaging of Liquid Crystal Polymer Using Terahertz Difference-Frequency Generation Source

2021 ◽  
Vol 11 (21) ◽  
pp. 10260
Author(s):  
Atsushi Nakanishi ◽  
Shohei Hayashi ◽  
Hiroshi Satozono ◽  
Kazuue Fujita
Keyword(s):  
Liquid Crystal ◽  
Optical Axis ◽  
Difference Frequency Generation ◽  
Liquid Crystal Polymer ◽  
Difference Frequency ◽  
Liquid Crystal Polymers ◽  
Polarization Imaging ◽  
Crystal Polymer ◽  
Cell Components ◽  
Frequency Generation

We performed the polarization imaging of a liquid crystal polymer with a terahertz difference-frequency generation (THz DFG) source. The DFG source is an easy-to-operate and practical THz source. Liquid crystal polymers (LCPs) are suitable for applications such as fuel cell components, aircraft parts, and next-generation wireless communication materials. Accordingly, the demand for evaluating the orientation of liquid crystals, which affects the properties of the polymers, is set to increase. Since LCPs exhibit birefringence in the THz range due to the orientation of the liquid crystal molecules, we can determine the alignment of the molecules from the direction of the optical axis.

Polarization imaging using an anisotropic diffraction grating and liquid crystal retarders

2018 ◽  
Vol 57 (30) ◽  
pp. 8870 ◽  
Author(s):  
Kohei Noda ◽  
Ryusei Momosaki ◽  
Jou Matsubara ◽  
Moritsugu Sakamoto ◽  
Tomoyuki Sasaki ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Diffraction Grating ◽  
Polarization Imaging ◽  
Anisotropic Diffraction
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