EKHI
The open database of optical and radiative data
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Publications: 167 Total entries: 1251
Determination of Emissivities with a Differential Scanning Calorimeter
R. N. Rogers, E. D. Morris
Emissivity changes during a determination can cause large errors in heats of decomposition or transition, as determined using a Perkin-Elmer Differential Scanning Calorimeter. Methods for reducing or eliminating such errors are discussed, and a differential method for determining emissivity coefficients …
8 entries
Further studies on lif-overcoated aluminum mirrors with highest reflectance in the vacuum ultraviolet
J. T. Cox, G. Hass, J. E. Waylonis
Further studies have been made on the preparation of LiF-overcoated aluminum mirrors with highest reflectance at wavelengths down to 1000 Å. Mirrors with 73% reflectance at ɛ = 1026 Å have been made. The extinction coefficient k of evaporated LiF …
1 entries
Far-Infrared Absorption Due to the Virtual Modes in NaCl
Toshikazu Kubota, Kumao Hisano, ON Matumura
No abstract provided
3 entries
The total hemispherical emittance of coated wires
D. Bradley, A. G. Entwistle
A theory is presented for the derivation of hemispherical spectral emittance, and hence total hemispherical emittance, for a uniformly coated cylinder. Numerical solutions are presented for the total hemispherical emittance of fine platinum-10% rhodium wires coated with fused silica in …
1 entries
Infrared Wavelength Dependence of the Total Absorptivity of Electroplated Silver
David Cline
The total hemispherical absorptivity of electroplated silver at 75.8°K has been measured as a function of blackbody radiation temperatures from 268°K to 367°K. The measurements were made in a Dewar-like calorimeter. The total hemispherical absorptivity is found to increase with …
6 entries
Infrared reflectance and emittance of silver and gold evaporated in ultrahigh vacuum
Jean M. Bennett, E. J. Ashley
The reflectance of silver and gold evaporated in ultrahigh vacuum has been measured in the wavelength range from 0.5 μ to 32 μ. It was found that the reflectance of both materials is higher than previously reported values, and that …
2 entries
GOLD CONTACT COATINGS: Normal spectral reflectance
Plasma resonance in the reflection spectrum of thin aluminium films
B. Feuerbacher, R. P. Godwin, M. Skibowski
The reflectance of thin Al fims has been measured near the plasma wavelength (840 Å) at a pressure of 2 × 10-9 Torr using synchrotron radiation as light source. For parallel-polarized light a plasma resonance maximum was found together with …
5 entries
The spectral reflectivity of back-surface and front-surface aluminized mirrors
G. G. Twidle
Results are given of a determination of spectral reflectivity of back- and front-aluminized quartz mirrors in the wavelength-range 0.25-1.35μ. A résumé is given, including reference to other recent work on front-surface mirrors, showing what are thought to be the highest …
2 entries
SILICON DIOXIDE CONTACT COATINGS: Angular spectral reflectance
Infrared lattice vibrations of zinc selenide and zinc telluride
H. D. Riccius
The infrared reflection and transmission spectra of zinc selenide and zinc telluride were investigated at room temperature in the region of the transverse and longitudinal optical phonon frequencies. From the transmission measurements at oblique incidence of vacuum-evaporated films of these …
7 entries
ZINC SELENIDE CONTACT COATINGS: Angular spectral reflectance, Normal spectral transmittance
The emissivity of metals and oxides, II: Measurements with the micropyrometer
G. K. Burgess, R. G. Waltenberg
No abstract provided
2 entries
VANADIUM OXIDE CONTACT COATINGS: Normal spectral emittance