Quantitative characterization of the carbon/carbon composites components based on video of polarized light microscope

2017 ◽  
Vol 80 (6) ◽  
pp. 644-651 ◽  
Author(s):  
Yixian Li ◽  
Lehua Qi ◽  
Yongshan Song ◽  
Xujiang Chao
Keyword(s):  
Light Microscope ◽  
Polarized Light ◽  
Carbon Composites ◽  
Quantitative Characterization

ROTATIONAL SYMMETRY OF TRANSMISSION PATTERNS AND ORDERING OF OPAL PHOTONIC CRYSTALS

2008 ◽  
Vol 17 (01) ◽  
pp. 97-104 ◽  
Author(s):  
W. KHUNSIN ◽  
S. G. ROMANOV ◽  
C. M. SOTOMAYOR TORRES
Keyword(s):  
Fourier Transform ◽  
Rotational Symmetry ◽  
Polarized Light ◽  
Quantitative Characterization ◽  
Transmission Pattern ◽  
Novel Approach ◽  
Transmission Attenuation ◽  
Lattice Planes ◽  
The Fourier Transform

A novel approach to the quantitative characterization of the regularity of the opal photonic crystal lattice based on a Fourier transform analysis of the azimuth rotational symmetry of the optical transmission is proposed. The magnitudes of three harmonics in the Fourier transform related to the two-, six- and twelvefold rotational symmetry of the transmission pattern have been suggested for quantification of the lattice ordering. The specific composition of these harmonics has been observed for the transmission attenuation at different lattice planes. The diffraction at (220) and (200) families of crystal planes has been identified as the most sensitive to the crystallinity of the opal lattice. The transmission pattern obtained in the s-polarized light is recommended for comparison.

scholarly journals Enhanced ordering in length-polydisperse carbon nanotube solutions at high concentrations as revealed by small angle X-ray scattering

Soft Matter ◽  
2021 ◽  
Author(s):  
Vida Jamali ◽  
Francesca Mirri ◽  
Evan G. Biggers ◽  
Robert A. Pinnick ◽  
Lucy Liberman ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Small Angle ◽  
Liquid Crystalline ◽  
Polarized Light ◽  
Quantitative Characterization ◽  
X Ray ◽  
X Ray Scattering ◽  
High Concentrations ◽  
Ray Scattering

Quantitative characterization of the phase behavior of carbon nanotube liquid crystalline solutions at high concentrations using polarized light microscopy and small angle X-ray scattering

High-resolution measurement of birefringent fine structure in living cells using a new polarized light microscope

1995 ◽  
Vol 53 ◽  
pp. 54-55
Author(s):  
Rudolf Oldenbourg
Keyword(s):  
Light Microscope ◽  
Fluorescent Dyes ◽  
Polarized Light ◽  
Processing System ◽  
Video Camera ◽  
Molecular Organization ◽  
Computer Assisted ◽  
Image Recording ◽  
Birefringent Crystal ◽  
Technological Advances

The recent renaissance of the light microsope is fueled in part by technological advances in components on the periphery of the microscope, such as the laser as illumination source, electronic image recording (video), computer assisted image analysis and the biochemistry of fluorescent dyes for labeling specimens. After great progress in these peripheral parts, it seems timely to examine the optics itself and ask how progress in the periphery facilitates the use of new optical components and of new optical designs inside the microscope. Some results of this fruitful reflection are presented in this symposium.We have considered the polarized light microscope, and developed a design that replaces the traditional compensator, typically a birefringent crystal plate, with a precision universal compensator made of two liquid crystal variable retarders. A video camera and digital image processing system provide fast measurements of specimen anisotropy (retardance magnitude and azimuth) at ALL POINTS of the image forming the field of view. The images document fine structural and molecular organization within a thin optical section of the specimen.

New polarized-light microscope for fast and orientation independent measurement of birefringent fine structure

1993 ◽  
Vol 51 ◽  
pp. 82-83
Author(s):  
Rudolf Oldenbourg
Keyword(s):  
Light Microscope ◽  
Polarized Light ◽  
Video Camera ◽  
Limited Range ◽  
Image Point ◽  
Computer Assisted ◽  
Optical Modulators ◽  
Anisotropic Structures ◽  
Long Time ◽  
Computer Assisted Image

The polarized light microscope has the unique potential to measure submicroscopic molecular arrangements dynamically and non-destructively in living cells and other specimens. With the traditional pol-scope, however, single images display only those anisotropic structures that have a limited range of orientations with respect to the polarization axes of the microscope. Furthermore, rapid measurements are restricted to a single image point or single area that exhibits uniform birefringence or other form of optical anisotropy, while measurements comparing several image points take an inordinately long time.We are developing a new kind of polarized light microscope which combines speed and high resolution in its measurement of the specimen anisotropy, irrespective of its orientation. The design of the new pol-scope is based on the traditional polarized light microscope with two essential modifications: circular polarizers replace linear polarizers and two electro-optical modulators replace the traditional compensator. A video camera and computer assisted image analysis provide measurements of specimen anisotropy in rapid succession for all points of the image comprising the field of view.

Light microscopy of ceramics

1993 ◽  
Vol 51 ◽  
pp. 908-909
Author(s):  
Walter C. McCrone
Keyword(s):  
Refractive Index ◽  
Light Microscopy ◽  
Light Microscope ◽  
Polarized Light ◽  
Refractive Indices ◽  
Complete Coverage ◽  
The Subject ◽  
Lower Refractive Index

An excellent chapter on this subject by V.D. Fréchette appeared in a book edited by L.L. Hench and R.W. Gould in 1971 (1). That chapter with the references cited there provides a very complete coverage of the subject. I will add a more complete coverage of an important polarized light microscope (PLM) technique developed more recently (2). Dispersion staining is based on refractive index and its variation with wavelength (dispersion of index). A particle of, say almandite, a garnet, has refractive indices of nF = 1.789 nm, nD = 1.780 nm and nC = 1.775 nm. A Cargille refractive index liquid having nD = 1.780 nm will have nF = 1.810 and nC = 1.768 nm. Almandite grains will disappear in that liquid when observed with a beam of 589 nm light (D-line), but it will have a lower refractive index than that liquid with 486 nm light (F-line), and a higher index than that liquid with 656 nm light (C-line).

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