Uncertainty evaluation in infrared optical material refractive index homogeneity measurement

2015 ◽  
Vol 36 (1) ◽  
pp. 82-87
Author(s):  
Liang Fei ◽  
◽  
Mai Lyu-bo ◽  
Zhou Tao-geng ◽  
Wang Lei ◽  
...  
Keyword(s):  
Refractive Index ◽  
Optical Material ◽  
Uncertainty Evaluation ◽  
Material Refractive Index

POLING PROPERTIES OF DOPED FILMS OF TRANSPARENT NITROPHENYLTRIAZOLE IN GLASSY POLYMER

1996 ◽  
Vol 05 (02) ◽  
pp. 409-411
Author(s):  
YE CHENG ◽  
FENG ZHIMING ◽  
XIANG YINGXU ◽  
XIN RUBIN ◽  
JIN FENG
Keyword(s):  
Refractive Index ◽  
Blue Light ◽  
Nonlinear Optical ◽  
Glassy Polymer ◽  
Optical Material ◽  
Nonlinear Optical Material

DMNPTAz is a newly developed blue-light transparent nonlinear optical material. Poling properties of doped films of DMNPTAz in PSt and PMMA were investigated with electrochromism and waveguiding refractive index measurements, respectively.

Optical material of high refractive index resin composed of sulfur-containing aromatic methacrylates

2000 ◽  
Vol 76 (1) ◽  
pp. 50-54 ◽  
Author(s):  
Tatsuhito Matsuda ◽  
Yasuaki Funae ◽  
Masahiro Yoshida ◽  
Tetsuya Yamamoto ◽  
Tsuguo Takaya
Keyword(s):  
Refractive Index ◽  
High Refractive Index ◽  
Optical Material ◽  
Sulfur Containing

The Study of Polymer Material Transference Phenomenon Measurement Method

2011 ◽  
Vol 383-390 ◽  
pp. 3110-3114
Author(s):  
Dang Juan Li ◽  
Shen Jian Wu
Keyword(s):  
Image Processing ◽  
Refractive Index ◽  
Polymer Material ◽  
Measurement Method ◽  
High Polymer ◽  
Fringe Spacing ◽  
Spacing Distance ◽  
Method Of Measurement ◽  
Material Refractive Index ◽  
Transference Phenomenon

In this paper, for the transference phenomenon of high polymers, a method of measurement system based on sodium light and feisuo interference with digital image processing technology was proposed. At first, the system measurement scheme and method were explained and there were some experiments with micro moleculesIn the experiment, the high polymer is the mixture of acetone and organic glass by a certain ratio, the micro molecules are Acetone and ethanol; at last, the interference strips were collected at interval time by using the image control collection procedure and processed. After thinning the fringes, we calculated the fringe spacing distance by K-L transform, by measuring the fringe spacing change in the polymer transference of acetone and ethanol we draw the change rule of the Polymer material refractive index :in 10 mins, the fringe spacing became to 40 percent , the refractive index became 2.5 times and keep invariant for Polymer material; in 50 mins, the fringe spacing became to 56 percent ,the refractive index became 1.7 times and kept invariant for ethanol. That’s all, at the time of balance, it will not infect the capability of the Polymer material any longer.

scholarly journals Feasibility of X-ray beam nanofocusing with compound refractive lenses

2021 ◽  
Vol 28 (2) ◽  
pp. 419-428
Author(s):  
V. G. Kohn ◽  
M. S. Folomeshkin
Keyword(s):  
Refractive Index ◽  
Photon Energy ◽  
Radiation Absorption ◽  
Beam Size ◽  
Radiation Wavelength ◽  
Transverse Beam ◽  
X Ray ◽  
Effective Aperture ◽  
Material Refractive Index ◽  
Lens Material

A more general analytical theory of X-ray beam propagation through compound refractive lenses (CRLs) than the earlier study by Kohn [(2003). JETP, 97, 204–215] is presented. The problem of nanofocusing with CRLs is examined in detail. For a CRL with a relatively large aperture the focusing efficiency is limited by the radiation absorption in the lens material. The aperture does not affect the focusing process and it is replaced by the effective aperture. The X-ray transverse beam size at the focus is then by a factor of γ = β/δ times smaller than the transverse beam size just behind the CRL. Here, δ and β are the real and imaginary parts of the CRL material refractive index n = 1 − δ + iβ. In this instance, to improve focusing efficiency, it is advantageous to decrease the CRL aperture and increase the photon energy E. However, with increasing photon energy, the material absorption decreases, which results in the CRL aperture impact on the transverse beam size. The latter leads to the fact that with a proper CRL length the beam size is independent of both the aperture and photon energy but depends only on the CRL material electron density and is approximately equal to w c = λ/(8δ)1/2, where λ denotes the radiation wavelength, as predicted by Bergemann et al. [(2003). Phys. Rev. Lett, 91, 204801].

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