EKHI
The open database of optical and radiative data
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Publications: 169 Total entries: 1362
Measurement of the Infrared Spectral Absorptance of Optical Materials
D. L. Stierwalt, J. B. Bernstein, D. D. Kirk
The spectral absorptances of some solids have been measured in the 2- to 25-&mu and region in the temperature range 313 to 473 K by use of a modified Beckman IR-3 spectrophotometer. The emission of each sample is compared directly …
9 entries
ZINC SULFIDE ZnS: Normal spectral absorptance
ZINC SELENIDE ZnSe: Normal spectral absorptance
MAGNESIUM FLUORIDE MgF₂: Normal spectral absorptance
Spectral and directional thermal radiation characteristics of selective sufaces for solar collectors
D. K. Edwards, J. T. Gier, K. E. Nelson, R. D. Roddick
Surface systems suitable for collectors of solar heat energy are examined. Spectral radiation characteristics of metallic substrates coated with semiconductor and antireflection layers are considered. Directional spectral reflectances of several surface coatings are presented and evaluated. Commercial chemical dip treatments …
1 entries
Verification of the anomalous-skin-effect theory for silver in the infrared
H. E. Bennett, J. M. Bennett, E. J. Ashley, R. J. Motyka
The measured infrared reflectance of silver films prepared by rapid evaporation in ultrahigh vacuum was found to be in excellent agreement (0.1%) with values predicted by the anomalous skin effect theory in the wavelength region from 4-24 μ (values of …
1 entries
Normal-incidence reflectance of aluminum films in the wavelength region 800-2000 Å
R. C. Vehse, E. T. Arakawa, J. L. Stanford
No abstract provided
4 entries
Note on the Reflecting Power of Tantalum, Tungsten, and Molybdenum
W. W. Coblentz
The positive and negative thermionic emission and the rate of evaporation of neutral atoms have been studied for well outgassed tungsten. To fix a reliable temperature scale the spectral emissivity for &lambda and =0.669 &mu and has been determined for …
1 entries
Optical Constants of Silicon in the Extreme Ultraviolet Region
T. Sasaki, K. Ishiguro
The optical constants n and k of a single crystal of silicon were determined by measurements of the reflectance at two angles of incidence in the region 10 to 19.2 eV. Energies of plasma oscillation derived from the optical data …
2 entries
Optical Constants of Germanium in the Region 1 to 10 ev
H. R. Philipp, E. A. Taft
The reflectance, |r(λ)|2, of single-crystal germanium was measured in the range 0.6 to 11.3 ev. The phase, θ(λ), was computed from these data using the Kramers-Kronig relation between the real and imaginary parts of the complex function lnr=ln|r|+iθ. The optical …
3 entries
Optical Properties of Ag and Cu
H. Ehrenreich, H. R. Philipp
Experimental data for the optical constants of Ag and Cu extending to 25 eV are discussed in terms of three fundamental physical processes: (1) free-electron effects, (2) interband transitions, and (3) collective oscillations. Dispersion theory is used to obtain an …
2 entries
COPPER: Normal spectral reflectance
Determination of the emissivity, for total radiation, of small diameter platinum-10% rhodium wires in the temperature range 600-1450°C
D. Bradley, A. G. Entwistle
The method of measurement of the emissivities is described. Two different lengths of wire, of the same diameter, were electrically heated in vacuo. By this procedure the end cooling correction could be eliminated experimentally. From the readings of wire resistance …
1 entries
Spectral Reflectance of CoAl and NiAl Alloys with CsCl Structure
Takashi Sambongi, Ryuhei Hagiwara, Tokio Yamadaya
Reflectance of CoAl and NiAl alloys with CsCl structure was measured in the spectral region between 7000 and 3000 Å. Structures in the reflectance curves are discussed in terms of interband transitions. Rigid-band approximation seems to be able to explain …
6 entries
[COBALT + ALUMINUM] ALLOYS: Normal spectral reflectance