Calculation of the absorption coefficients of optical materials by measuring the transmissivities and refractive indices

2002 ◽  
Vol 34 (3) ◽  
pp. 209-211 ◽  
Author(s):  
C.H. Huang ◽  
G. Zhang ◽  
Z.Q. Chen ◽  
X.J. Huang ◽  
H.Y. Shen
Keyword(s):  
Optical Materials ◽  
Refractive Indices ◽  
Absorption Coefficients

Development of Low-Cost Abbe Refractometer

2018 ◽  
Vol 879 ◽  
pp. 227-233
Author(s):  
Weeratouch Pongruengkiat ◽  
Thitika Jungpanich ◽  
Kodchakorn Ittipornnuson ◽  
Suejit Pechprasarn ◽  
Naphat Albutt
Keyword(s):  
Refractive Index ◽  
Optical Materials ◽  
Low Cost ◽  
Optical Component ◽  
Refractive Indices ◽  
Constant Number ◽  
Optical Wavelength ◽  
Refractive Index Spectrum ◽  
Transparent Polymers ◽  
Abbe Refractometer

Refractive index and Abbe number are major physical properties of optical materials including glasses and transparent polymers. Refractive index is, in fact, not a constant number and is varied as a function of optical wavelength. The full refractive index spectrum can be obtained using a spectrometer. However, for optical component designers, three refractive indices at the wavelengths of 486.1 nm, 589.3 nm and 656.3 nm are usually sufficient for most of the design tasks, since the rest of the spectrum can be predicted by mathematical models and interpolation. In this paper, we propose a simple optical instrumental setup that determines the refractive indices at three wavelengths and the Abbe number of solid and liquid materials.

Average value of the shape and direction factor in the equation of refractive index

2017 ◽  
Vol 31 (29) ◽  
pp. 1750263 ◽  
Author(s):  
Tao Zhang
Keyword(s):  
Refractive Index ◽  
Theoretical Calculation ◽  
Calculation Method ◽  
Electromagnetic Induction ◽  
Optical Materials ◽  
Electron Cloud ◽  
Refractive Indices ◽  
Average Value ◽  
Electron Clouds ◽  
Induction Energy

The theoretical calculation of the refractive indices is of great significance for the developments of new optical materials. The calculation method of refractive index, which was deduced from the electron-cloud-conductor model, contains the shape and direction factor [Formula: see text]. [Formula: see text] affects the electromagnetic-induction energy absorbed by the electron clouds, thereby influencing the refractive indices. It is not yet known how to calculate [Formula: see text] value of non-spherical electron clouds. In this paper, [Formula: see text] value is derived by imaginatively dividing the electron cloud into numerous little volume elements and then regrouping them. This paper proves that [Formula: see text] when molecules’ spatial orientations distribute randomly. The calculations of the refractive indices of several substances validate this equation. This result will help to promote the application of the calculation method of refractive index.

Large Nonlinear Refractive Indices of Nickel Dithiolene Doped Polymethylmethacrylate

1992 ◽  
Vol 247 ◽  
Author(s):  
Christopher S. Winter ◽  
S. N. Oliver ◽  
C A. S. Hill
Keyword(s):  
Refractive Index ◽  
Nonlinear Absorption ◽  
Nonlinear Refractive Index ◽  
Refractive Indices ◽  
Absorption Coefficients ◽  
Figures Of Merit ◽  
Linear And Nonlinear

ABSTRACTThe nonlinear refractive index, linear and nonlinear absorption coefficients of a number of nickel dithiolene-doped PMMA polymers have been measured. Nonlinear refractive indices up to about 10−8 cm−2/KW were observed, with figures of merit defined by δnsat/αλ and Reχ(3) / Im χ(3) within acceptable device limits.

Difference in spectral reflectivity between grains of homogeneous and exsolved titanomagnetite

1976 ◽  
Vol 40 (316) ◽  
pp. 843-851 ◽  
Author(s):  
B. Halfen
Keyword(s):  
Chemical Composition ◽  
Refractive Indices ◽  
Absorption Coefficients ◽  
Spectral Reflectivity

SummaryThe spectral reflectivities of homogeneous and exsolved titanomagnetites of the same chemical composition were measured in air and in oil. The reflectivities of the two kinds of titanomagnetite are closely similar in the blue part of the spectrum, but become increasingly different when proceeding towards the red end. The refractive indices (n) and the absorption coefficients (k) were calculated from the reflectivity values. The n-values of the two kinds of titanomagnetite show a pattern of separation similar to that of the reflectivity values. Regarding possible differences between the k-values no reliable conclusions could be drawn. Some possible explanations of the observed separations are discussed.

scholarly journals Antimony orthophosphate glasses with large nonlinear refractive indices, low two-photon absorption coefficients, and ultrafast response

2005 ◽  
Vol 97 (1) ◽  
pp. 013505 ◽  
Author(s):  
E. L. Falcão-Filho ◽  
Cid B. de Araújo ◽  
C. A. C. Bosco ◽  
G. S. Maciel ◽  
L. H. Acioli ◽  
...  
Keyword(s):  
Photon Absorption ◽  
Refractive Indices ◽  
Absorption Coefficients ◽  
Two Photon Absorption ◽  
Two Photon

Analysis of the Refractive Indices of TiO2, TiOF2, and TiF4:  Concept of Optical Channel as a Guide To Understand and Design Optical Materials

2005 ◽  
Vol 44 (10) ◽  
pp. 3589-3593 ◽  
Author(s):  
Xavier Rocquefelte ◽  
Fabrice Goubin ◽  
Yvan Montardi ◽  
Nicolas Viadere ◽  
Alain Demourgues ◽  
...  
Keyword(s):  
Optical Materials ◽  
Optical Channel ◽  
Refractive Indices
Sign in / Sign up

Export Citation Format

Share Document