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

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

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.

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

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

Differential polarization imaging of sickled cells

1988 ◽  
Vol 46 ◽  
pp. 62-63
Author(s):  
Marcos F. Maestre
Keyword(s):  
Optical Properties ◽  
Theoretical Approach ◽  
Polarized Light ◽  
Polarization Microscopy ◽  
Spectroscopic Techniques ◽  
Polarization Imaging ◽  
Circularly Polarized Light ◽  
Circularly Polarized ◽  
Microscopic Scale ◽  
Chiral Structures

Recently we have developed a form of polarization microscopy that forms images using optical properties that have previously been limited to macroscopic samples. This has given us a new window into the distribution of structure on a microscopic scale. We have coined the name differential polarization microscopy to identify the images obtained that are due to certain polarization dependent effects. Differential polarization microscopy has its origins in various spectroscopic techniques that have been used to study longer range structures in solution as well as solids. The differential scattering of circularly polarized light has been shown to be dependent on the long range chiral order, both theoretically and experimentally. The same theoretical approach was used to show that images due to differential scattering of circularly polarized light will give images dependent on chiral structures. With large helices (greater than the wavelength of light) the pitch and radius of the helix could be measured directly from these images.

Sign in / Sign up

Export Citation Format

Share Document