scholarly journals Densities and Optical Properties of Organic Compounds in the Liquid State. VI. The Refractive Indices of Paraffin Hydrocarbons and Some of Their Derivatives

1956 ◽  
Vol 29 (3) ◽  
pp. 336-339 ◽  
Author(s):  
Maurice L. Huggins
Keyword(s):  
Optical Properties ◽  
Organic Compounds ◽  
Liquid State ◽  
Refractive Indices

Heat capacities of organic compounds in liquid state II. C1 to C18 n‐alkanes

1991 ◽  
Vol 20 (2) ◽  
pp. 405-444 ◽  
Author(s):  
Vlastimil Růžička ◽  
Milan Zábranský ◽  
Vladmír Majer
Keyword(s):  
Organic Compounds ◽  
Liquid State ◽  
Heat Capacities

scholarly journals Microstructure-Induced Anisotropic Optical Properties of YF3 Columnar Thin Films Prepared by Glancing Angle Deposition

Nanomaterials ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 2413
Author(s):  
Yao Shan ◽  
Pian Liu ◽  
Yao Chen ◽  
Haotian Zhang ◽  
Huatian Tu ◽  
...  
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Volume Fraction ◽  
Electron Beam Evaporation ◽  
Glancing Angle Deposition ◽  
Refractive Indices ◽  
Glancing Angle ◽  
Axis Parallel ◽  
Angle Deposition ◽  
Deposition Angle

Yttrium fluoride (YF3) columnar thin films (CTFs) were fabricated by electron beam evaporation with the glancing angle deposition method. The microstructures and optical properties of YF3 CTFs were studied systematically. The YF3 films grown at different deposition angles are all amorphous. As the deposition angle increases, the columns in YF3 CTFs become increasingly separated and inclined, and the volume fraction of YF3 decreases, resulting in lower refractive indices. This phenomenon is attributed to the self-shadowing effect and limited adatom diffusion. The YF3 CTFs are optically biaxial anisotropic with the long axis (c-axis) parallel to the columns, the short axis (b-axis) perpendicular to the columns, and the other axis (a-axis) parallel to the film interface. The principal refractive index along the b-axis for the 82°-deposited sample is approximately 1.233 at 550 nm. For the 78°-deposited sample, the differences of principal refractive indices between the c-axis and the b-axis and between the a-axis and the b-axis reach the maximum 0.056 and 0.029, respectively. The differences of principal refractive indices were affected by both the deposition angle and the volume fraction of YF3.

Optical properties of a liquid crystal with small ordinary and extraordinary refractive indices and small optical anisotropy

2014 ◽  
Vol 22 (3) ◽  
Author(s):  
J. Kędzierski ◽  
K. Garbat ◽  
Z. Raszewski ◽  
M. Kojdecki ◽  
K. Kowiorski ◽  
...  
Keyword(s):  
Refractive Index ◽  
Optical Properties ◽  
Liquid Crystal ◽  
Optical Anisotropy ◽  
Order Parameter ◽  
Orientational Order ◽  
Refractive Indices ◽  
Orientational Order Parameter ◽  
Unknown Density ◽  
Abbe Refractometer

AbstractOptical properties of a nematic liquid crystal with small refractive index and small birefringence were studied. The ordinary and extraordinary refractive indices and birefringence were measured as functions of temperature by using an Abbe refractometer and wedge nematic cells. From values of these indices the nematic orientational order parameter was calculated by using several methods and corresponding mathematical models. Kuczyński et al. method was found to be suitable for determining the order parameter also for materials featuring small ordinary refractive index, with unknown density.

scholarly journals MOPSMAP v0.9: A versatile tool for modeling of aerosol optical properties

2018 ◽  
Author(s):  
Josef Gasteiger ◽  
Matthias Wiegner
Keyword(s):  
Remote Sensing ◽  
Optical Properties ◽  
Aerosol Particles ◽  
Particle Orientation ◽  
Spherical Particles ◽  
Refractive Indices ◽  
Hygroscopic Growth ◽  
Web Interface ◽  
Optical Modeling ◽  
Wide Range

Abstract. The spatiotemporal distribution and characterization of aerosol particles are usually determined by remote sensing and optical in-situ measurements. These measurements are indirect with respect to microphysical properties and thus inversion techniques are required to determine the aerosol microphysics. Scattering theory provides the link between microphysical and optical properties; it is not only needed for such inversions but also for radiative budget calculations and climate modeling. However, optical modeling can be very time consuming, in particular if non-spherical particles or complex ensembles are involved. In this paper we present the MOPSMAP package (modeled optical properties of ensembles of aerosol particles) which is computationally fast for optical modeling even in case of complex aerosols. The package consists of a data set of pre-calculated optical properties of single aerosol particles, a Fortran program to calculate the properties of user-defined aerosol ensembles, and a user-friendly web interface for online calculations. Spheres, spheroids, and a small set of irregular particle shapes are considered over a wide range of sizes and refractive indices. MOPSMAP provides the fundamental optical properties assuming random particle orientation, including the scattering matrix for the selected wavelengths. Moreover, the output includes tables of frequently used properties such as the single scattering albedo, the asymmetry parameter or the lidar ratio. To demonstrate the wide range of possible MOPSMAP applications a selection of examples is presented, e.g., dealing with hygroscopic growth, mixtures of absorbing and non-absorbing particles, the relevance of the size equivalence in case of non-spherical particles, and the variability of volcanic ash microphysics. The web interface is designed to be intuitive for expert and non-expert users. To support users a large set of default settings is available, e.g., several wavelength-dependent refractive indices, climatologically representative size distributions, and a parameterization of hygroscopic growth. Calculations are possible for single wavelengths or user-defined sets (e.g., of specific remote sensing application). For expert users more options for the microphysics are available. Plots for immediate visualization of the results are shown. The complete output can be downloaded for further applications. All input parameters and results are stored in the user’s personal folder so that calculations can easily be reproduced. The MOPSMAP package is available on request for offline calculations, e.g., when large numbers of different runs for sensitivity studies shall be made.

The Optical Properties of Organic Compounds

1954 ◽  
Vol 37 (4) ◽  
pp. 1027-1028
Author(s):  
Wm V Elsenberg
Keyword(s):  
Optical Properties ◽  
Organic Compounds
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