Center, we have measured the absolute refractive index of five specimens ... temperature-dependent Sellmeier fits of measured refractive index are also ...
NASA Website
measured the absolute refractive index of prisms of these three materials ... For N-BK7, we report absolute refractive index and therrno-optic coefficient ...
Simultaneous analysis of refractive index and physical thickness by Fourier domain optical is explored as a tool for simultaneous refractive index and physical thickness measurement of layered samples knowledge of the absolute source power. The effect of optical dispersion on the ...
E-print Network
A measurement of length performed by optical interferometry in air requires accurate values for the absolute refractive index of air and for the dispersion (variation of refractive index with wavelength) of air in the visible part of the electromagnetic s...
National Technical Information Service (NTIS)
In order to enable high quality lens designs using N-BK7, BaLKN3, and SF15 at cryogenic temperatures, we have measured the absolute refractive index of prisms of these three materials using the Cryogenic, High-Accuracy Refraction Measuring System (CHARMS)...
We report a simple method of measuring the absolute values of the phase refractive index of an optical material of a flat plate shape over a wide spectral range at a single measurement run. A white-light interferometric technique with angle rotation of the optical plate sample located in one of the interferometer arms was used in this ...
PubMed
... WITH DIFFERENT AND CONTROLLED REFRACTIVE INDICES BY CONTROLLING THE ... NO DISPERSION OF THE REFRACTIVE INDEX IN THE ...
DTIC Science & Technology
The Climate Absolute Radiance and Refractivity Observatory (CLARREO) plans to observe climate change
NASA Technical Reports Server (NTRS)
... delocalization, and molecular structure on the refractive index of conjugated polymers. The wavelength dependent refractive indices of several well ...
We developed an accurate and efficient method for measuring the refractive indices of a transparent plate by analyzing the transmitted intensity versus angle of incidence. By using two different wavelengths, we resolved the 2pi-ambiguity inherent to the phase measurement involving a thick medium, leading to independent determination of the absolute ...
... The Index of Refraction of Seawater Scripps Institution of Oceanography ... 3-6 Page 26. r 4. THE INDEX OF REFRACTION OF SEAWATER ...
the effects of the refractive index variations with concentration ... concentration and temperature. The variation of refractive index with temperature ...
... Accession Number : AD0275124. Title : CUMULUS CLIMATOLOGY AND REFRACTIVE INDEX CLOUD REFRACTIVE INDEX STUDIES, II. ...
The experimental variation of the scattered light with the number of scattering centers and with the refractive index of gases is in agreement with thetheoretical Rayleigh scattering. A direct calibration system gives the absolute value of the Rayleigh ra...
We present a terahertz time-domain experimental technique for the detection of scattering from porous media. The method for detection of the scattering enables one to make a decision when Fresnel or Kramers-Kronig (K-K) analysis can be applied for a porous medium. In this study the real refractive index of a tablet is calculated using the conventional K-K ...
We propose a variable-path interferometric technique for the measurement of the absolute refractive index of optical glasses. We use two interferometers to decide the ratio between changes in the optical path in a prism-shaped sample glass and in air resulting from displacement of the sample. The method allows precise measurements to ...
Energy Citations Database
By the minimum deviation method using a prism shaped cell, the absolute refractive indices of high-performance liquid chromatography distilled water were measured at the wavelengths from 1129 to 182 nm, at the temperature of 19 �C, 21.5 �C, and 24 �C, and then dn/dt at 21.5 �C was calculated. The coefficients of the four-term Sellmeier dispersion ...
NASA Astrophysics Data System (ADS)
The refractive index of germanium was measured for ten samples, covering the various crystal types, over the 8-14-microm wavelength range. Samples were obtained from several suppliers, and differences between samples in the index values reported were not significant compared with the estimated index uncertainties ...
We developed a simple and accurate method for measuring the refractive indices of transparent plates by analyzing the transmitted fringe pattern as a function of angle of incidence. By using two different wavelengths, we resolved the 2?- ambiguity inherent to the phase measurement involving a thick medium, leading to independent determination of the ...
A new laser differential confocal lens refractive index measurement is proposed, which uses the absolute zero of the differential confocal axial intensity curve to precisely identify the positions of the objective when the measurement pencil is focused on the vertex of the test lens and the reflector with or without the test lens in ...
A nondestructive measurement method that makes possible the measurement of a three-dimensional refractive-index distribution of any shape plastic lens is presented. In this method, a Mach-Zehnder interferometer and shearing interferometer are combined into a single optical system and are used selectively. Interference fringes of a test object that is immersed in matching ...
... Abstract : The refractive indices of selected monovalent and ... Descriptors : *ALUMINUM OXIDES, *REFRACTIVE INDEX, POLARIZATION, ION ...
... computation of ray traces directly without going through the intermediate step of determining refractive indices or refractive index gradients is ...
... are created by either dissolving the appropriate amount of material or by mixing two standard refractive index liquids. The refractive indices of the ...
... rules used for determining the refractive index of a ... restriction as to the value of the refractive indices. ... case of solutes of colloidal dimensions, where ...
... Title : On the Refractive Index of Rutile. ... Abstract : There are several reports on the measurement of the refractive indices of single-crystal rutile. ...
Binary diffraction gratings in As{sub 2}S{sub 3} films were prepared with the aid of an electron beam. The dose of the electrons was varied. The gratings were read with a HeNe laser, and the zero-order and first-order diffraction efficiencies were noted. Rigorous diffraction theory was used to give a homogeneous approximation for the refractive index ...
A piezooptical effect in monoclinic triglycime sulfate crystals is described, and expressions are obtained which relate piezooptical coefficients piezo-induced to changes in the refraction index of the crystals with allowance for their elasticity. The absolute values of the piezooptical coefficients of triglycine sulfate crystals are ...
... Title : THICKNESS AND REFRACTIVE INDEX OF FATTY ACID, ALCOHOL, AMINE AND AMIDE RETRACTED MONOLAYERS. ...
... Descriptors : (*ELECTROMAGNETISM, REFRACTIVE INDEX), (* REFRACTIVE INDEX, ELECTROMAGNETISM), (*TURBULENCE ...
... REFRACTIVE INDEX, *MICROWAVE EQUIPMENT, *INFRARED OPTICAL MATERIALS, *DIELECTRIC PROPERTIES, *ABSORPTION ...
... Accession Number : ADA132107. Title : On the Determination of the Index of Refraction of the Atmosphere. Descriptive ...
... Title : NONDESTRUCTIVE REFRACTIVE INDEX CHARACTERIZATION OF OPTICAL FIBERS USING A PHASE CONTRAST SCANNING OPTICAL ...
... OF REFRACTIVE INDEX, DENSITY, AND REFLECTED LIGHT DISTRIBUTIONS FOR CARBON DIOXIDE AND WATER CRYODEPOSITS. ...
... Title : MEASUREMENT OF THE REFRACTIVE INDEX STRUCTURE COEFFICIENT CN. Descriptive Note : Memorandum rept. ...
... Accession Number : AD0632792. Title : DEVELOPMENT OF AN INDEX OF REFRACTION SENSOR FOR ATMOSPHERIC SOUNDING. ...
... OF THICKNESS AND REFRACTIVE INDEX OF THIN FILMS AS AN APPROACH TO THE STUDY OF BIOLOGICAL MACROMOLECULES. ...
... Title : DETERMINATION OF THE COMPLEX REFRACTIVE INDEX PROFILES IN PHOSPHORUS 31 ION IMPLANTED SILICON BY ...
... Accession Number : AD0686810. Title : DETERMINATION OF REFRACTIVE INDEX VARIATIONS IN THE TROPOSPHERE. ...
... COMPLEX REFRACTIVE INDEX AND PHOSPHORUS CONCENTRATION PROFILES IN PHOSPHORUS 31 POSITIVE ION IMPLANTED SILICON ...
... Title : COMPENSATION FOR REFRACTIVE-INDEX VARIATIONS IN LASER DOPPLER ANEMOMETRY. Corporate Author : ...
... Title : ATMOSPHERIC AEROSOL INDEX OF REFRACTION AND SIZE-ALTITUDE DISTRIBUTIONFROM BISTATIC LASER SCATTERING AND ...
is the index of refraction; s is path length; and 2 =� �d dr ..... where n is the index of refraction, V is the velocity vector of the satellite, and ...
The functional group contribution to molar refraction and refractive index of pi-conjugated polymers has been evaluated from the available refractive index dispersion data for 33 conjugated polymers. The Lorentz-Lorenz molar refraction (Ru) of 24 function...
Multichannel crossed-beam photothermal refraction experiments have been performed. Iron(II)-phenanthroline in methanol was the test solute. The response as a function of concentration exhibited a nonlinear relationship, which does not agree with the current theoretical description of the phenomena. Although photophysical and photochemical processes were not totally eliminated ...
The absolute absorption of ozone in the midinfrared has been measured relative to 253.7-nm ultraviolet absorption to an accuracy of 1% using a Bruker Fourier transform spectrometer. These new results agree with previous measurements by diode laser measurements after the latter are corrected for more recent infrared calculations and ultraviolet cross sections. They also agree ...
We present high-accuracy measurements for wavelengths near 157 nm of the absolute index of refraction, the index dispersion, and the temperature dependence of the index for the ultraviolet optical materials with cubic symmetry: CaF2, SrF2, BaF2, and LiF. Accurate values of these quantities for ...
... and refractive indices, does not usually yield reliable refractive indices for dielectric ... that enable a reliable assessment of refractive index profiles for ...
REFRACTIVITY - refractivity, N-units [(index of refraction -1) * 10**6]. REFRACT_DEV - refractivity standard deviation, N-units [(index of refraction -1) ...
What we believe to be a novel two-dimensional spectral surface plasmon resonance imaging technique determining pressure distribution in elastohydrodynamic lubricant films is presented. This technique makes use of the spectral characteristics associated with the surface plasmon resonance (SPR) effect, and it provides more spectral information in refractive ...
... Title : Refractivity of Combustion Gases,. ... Descriptors : *Combustion, *Gases, *Refractive index, Optical properties, Measurement, Reprints, Density. ...
... is to demonstrate that it is feasible to build a small, lightweight meteorological sonde capable of measuring index of refraction (Mini-Refraction ...
... analyzing glycol ether-water mixtures, the densities and refractive ... GLYCOLS, PHYSICAL PROPERTIES), DENSITY, REFRACTIVE INDEX ...
... Title : DENSITIES AND REFRACTIVE INDICES OF AQUEOUS SOLUTIONS. ... effect of chemical structure on density and refractive index, data were ...
Refractive index control and its relevance to the velocity-selective effect generated by the propagation direction of the incoherent pumping field are studied in an open V-type atomic system. The velocity-selective effect on electromagnetically-induced transparency (EIT) is presented in theory and verified in the experiment. It shows that, in contrast to ...
A new compact optical refractometer is presented to improve the measurement of the refractive index of seawater. These measurements are useful in oceanography to calculate density and salinity of oceans from empirical relations. This refractometer shows a lower temperature dependence and obtains a better absolute accuracy on salinity ...
... dependent on refractive indexes, particularly the real index. as changes in extinction of up to an order of magnitude are ...
Absorption spectra from colloids containing different concentrations of spherical gold nanoparticles in water were measured with a spectrophotometer. The absorption spectra were used to calculate the number density of nanoparticles (NPs) with the aid of an unconventional finite spectral band f-sum rule applied for gold colloid. Good correlation between the number density of dispersion electrons, ...
The slope is the index of refraction in Snell's Law, as given by the following equation: sin ?i ? sin ?r = constant (index of refraction). ...
... Title : Refractive Index Increments of Polymers in Solution: 2. Refractive Index Increments and Light-Scattering in Polydisperse Systems of Low ...
The refractive index structure coefficient, Cn, is an important parameter for optical propagation in the atmosphere. A theoretical discussion of structure functions is presented to show the origin of the refractive index and temperature structure function...
care must be taken to ensure the accuracy of refractive index gradients when using ... When two properties change the refractive index simultaneously, two- ...
... refractive index was estimated from cell concentration, measured ... than predicted by Mie theory, most likely ... size and refractive index of cells in the ...
... 21 CLOUD PHYSICS LABORATORY CLOUD REFRACTIVE INDEX STUDIES PART ]m ... CLOUD REFRACTIVE INDEX STUDIES PART III ...
... NO. 51 K CLOUD REFRACTIVE INDEX " ~IDlES ... GEOPHYSICAL RESEARCH PAPERS NO. 51 CLOUD REFRACTIVE INDEX STUDIES ...
... The parameters to be measured are the apparent elevation angle of the calibration source and the surface index of refraction. ...
... DEPENDENCE OF THE REFRACTIVE INDEX OF SILICON AT ELEVATED TEMPERATURES AT SEVERAL LASER WAVELENGTHS. ...
... INFERENCE OF ATMOSPHERIC REFRACTIVE INDEX PROFILES FROM OBSERVATIONS OF RADAR ANGELS, IN: 1964 WORLD CONF ON ...
We present precise and absolute measurements of full complex third-order optical susceptibility on different fused-silica and original glasses composed of tellurium, titanium, and niobium erbium. These materials are designed to be the key point for applications ranging from high-power laser systems to optoelectronics; their nonlinear index of ...
An evaluation is made of the effect of refractive bending in the troposphere on the propagation of high frequency (HF) radio waves. The index of refraction in the troposphere is defined in terms of the CRPL Reference Refractivity Atmosphere - 1958. The el...
Interferometric range measurements using a wavelength-tunable source form the basis of several measurement techniques, including optical frequency domain reflectometry (OFDR), swept-source optical coherence tomography (SS-OCT), and frequency-modulated continuous wave (FMCW) lidar. We present a phase-sensitive and self-referenced approach to swept-source interferometry that yields ...
