scholarly journals LiCHI – Liquid Crystal Hyperspectral Imager for simultaneous multispectral imaging in aeronomy

2015 ◽  
Vol 23 (14) ◽  
pp. 17772 ◽  
Author(s):  
Chhavi Goenka ◽  
Joshua Semeter ◽  
John Noto ◽  
Jeffrey Baumgardner ◽  
Juanita Riccobono ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Multispectral Imaging

The Study on Spectral Imaging Technique in Detection of Dermatosis

2012 ◽  
Vol 472-475 ◽  
pp. 879-882
Author(s):  
Yan Ping Chen ◽  
Jiao Dai ◽  
Ling Hua Kong ◽  
Chun Bin Li
Keyword(s):  
Liquid Crystal ◽  
Skin Disease ◽  
Multispectral Imaging ◽  
Imaging Technique ◽  
Spectral Imaging ◽  
Cost Effective ◽  
Tunable Filter ◽  
Human Beings ◽  
Imaging Technology ◽  
Filter Wheel

Dermatosis, a kind of common and frequent disease, is harmful to health and risk against the lives of human beings. The detection of dermatosis is of great significance, especially to the early diagnosis of skin disease. Nowadays, the studies of spectral imaging technology in the diagnosis of skin disease are attracting more and more attentions. In this paper, we firstly review some literary products related to dermatosis detection and then make a comparison among fluorescence spectrum method, filter wheel method, liquid crystal tunable filter (LCTF) method and mosaic multispectral imaging technology. Finally we propose that the smaller, lighter and more cost-effective equipment should be the trend.

High dynamic range multispectral imaging using liquid crystal tunable filter

2010 ◽  
Author(s):  
Boneng Tan ◽  
Ningfang Liao ◽  
Lixun Tian ◽  
Jiajia Wang ◽  
Yusheng Lianry
Keyword(s):  
Liquid Crystal ◽  
Multispectral Imaging ◽  
Dynamic Range ◽  
High Dynamic Range ◽  
Tunable Filter ◽  
High Dynamic

Freeze-fracture TEM of the helical smectic A* phase

1992 ◽  
Vol 50 (1) ◽  
pp. 278-279
Author(s):  
K.J. Ihn ◽  
R. Pindak ◽  
J. A. N. Zasadzinski
Keyword(s):  
Liquid Crystal ◽  
Grain Boundary ◽  
Grain Boundaries ◽  
Freeze Fracture ◽  
Smectic Phase ◽  
Layer Spacing ◽  
Screw Dislocations ◽  
Smectic A ◽  
Smectic Phases ◽  
Discrete Amount

A new liquid crystal (called the smectic-A* phase) that combines cholesteric twist and smectic layering was a surprise as smectic phases preclude twist distortions. However, the twist grain boundary (TGB) model of Renn and Lubensky predicted a defect-mediated smectic phase that incorporates cholesteric twist by a lattice of screw dislocations. The TGB model for the liquid crystal analog of the Abrikosov phase of superconductors consists of regularly spaced grain boundaries of screw dislocations, parallel to each other within the grain boundary, but rotated by a fixed angle with respect to adjacent grain boundaries. The dislocations divide the layers into blocks which rotate by a discrete amount, Δθ, given by the ratio of the layer spacing, d, to the distance between grain boundaries, lb; Δθ ≈ d/lb (Fig. 1).

Attractive mode force microscopy of chiral liquid crystal surfaces

1992 ◽  
Vol 50 (1) ◽  
pp. 268-269
Author(s):  
B.D. Terris ◽  
R. J. Twieg ◽  
C. Nguyen ◽  
G. Sigaud ◽  
H. T. Nguyen
Keyword(s):  
Liquid Crystal ◽  
Crystal Surfaces ◽  
Free Surfaces ◽  
Control Range ◽  
Force Microscopy ◽  
Liquid Crystal Films ◽  
Chiral Liquid Crystal ◽  
Crystal Films ◽  
Electrostatic Charging ◽  
And Shifts

We have used a force microscope in the attractive, or noncontact, mode to image a variety of surfaces. In this mode, the microscope tip is oscillated near its resonant frequency and shifts in this frequency due to changes in the surface-tip force gradient are detected. We have used this technique in a variety of applications to polymers, including electrostatic charging, phase separation of ionomer surfaces, and crazing of glassy films.Most recently, we have applied the force microscope to imaging the free surfaces of chiral liquid crystal films. The compounds used (Table 1) have been chosen for their polymorphic variety of fluid mesophases, all of which exist within the temperature control range of our force microscope.

Development of liquid crystal light valves using Bi12SiO20 as the photoconductor. Part 2: Device performance

1986 ◽  
Vol 133 (1) ◽  
pp. 65
Author(s):  
W.L. Baillie ◽  
P.M. Openshaw ◽  
A.D. Hart ◽  
S.S. Makh
Keyword(s):  
Liquid Crystal ◽  
Device Performance
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