Spectral Emissivity & Emittance

Spectral emittance and reflectance of powders
J. R. Aronson, A. G. Emslie, T. P. Rooney, I. Coleman, and G. Horlick
Applied Optics, Vol. 8, Issue 8, pp. 1639- (1969)

Citation
J. R. Aronson, A. G. Emslie, T. P. Rooney, I. Coleman, and G. Horlick, “Spectral emittance and reflectance of powders,” Appl. Opt. 8, 1639- (1969)

Cavity methods for determining the emittance of solids
E. M. Sparrow, P. D. Kruger, and R. P. Heinisch

Applied Optics, Vol. 12, Issue 10, pp. 2466- (1973)

Citation
E. M. Sparrow, P. D. Kruger, and R. P. Heinisch, “Cavity methods for determining the emittance of solids,” Appl. Opt. 12, 2466- (1973)

Spectral reflectance and emittance of particulate materials
A. G. Emslie and J. R. Aronson
Applied Optics, Vol. 12, Issue 11, pp. 2563-

Citation
A. G. Emslie and J. R. Aronson, “Spectral reflectance and emittance of particulate materials,” Appl. Opt. 12, 2563- (1973)

Spectral emissivity of hydrogen chloride from 1000-3400 cm-1 V
V. Robert Stull and Gilbert N. Plass
JOSA, Vol. 50, Issue 12, pp. 1279- (1960)

Citation
V. R. Stull and G. N. Plass, “Spectral emissivity of hydrogen chloride from 1000-3400 cm-1 V,” J. Opt. Soc. Am. 50, 1279- (1960)

Authors: Madding, Robert P.\
Affiliation: AA(Inframetrics, Inc.)
Publication:
Proc. SPIE Vol. 3700, p. 393-401, Thermosense XXI, Dennis H. LeMieux; John R. Snell; Eds. (SPIE Homepage)
Publication Date:03/1999
Origin:SPIEAbstract Copyright:
(c) 1999 SPIE–The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Bibliographic Code: 1999SPIE.3700..393M
Abstract: Extraction of temperatures or temperature differences with thermography is not possible without knowledge of the target emissivity…

A project under the Tufts University Research for Undergraduates 2000 Program described both theory and experiments related to welding of metals. Its report is online (CLICK HERE FOR FULL REPORT) and the Abstract is below.

Abstract

“The basic assumption behind the operating principle of modern thermal imaging thermometers is a “graybody approximation”. For a graybody, the emittance, reflectance and transmittance are constant for all wavelengths within the wavelengths within the waveband over which the instrument measures.

“In reality however, these factors change, and for applications that take place over a wide temperature range, the emissivity variation needs to be taken into account. This work suggests a method for an in-process emissivity identification and adaptation in order to dynamically calibrate infrared temperature measurement systems for applications like heat treatment, welding, cutting etc. A series of experiments has proven that once the spatial and temporal components of emissivity are decoupled, a model can be developed, which in conjunction with direct IR radiosity monitoring can provide information about the required emissivity compensation.”

PJ Hesketh, JN Zemel, B Gebhart - Physical Review B, 1988 - APS Polarized spectral emittance from periodic micromachined surfaces. II. VOLUME 37, NUMBER 18

From the Abstract:The polarized directional spectral (3 um <=lambda =>14um) emittances (PDSE’s) of highly doped, micromachined, periodic structures on silicon were measured…

Peter J. Hesketh, Jay N. Zemel & Benjamin Gebhart ; Physical Review B.37.10795
VOLUME 37, NUMBER 18 1988

From the Abstract: The normal, polarized spectral (3 um <=lambda =>14um) emittances of highly doped, micromachined, periodic structures on heavily phosphorus-doped (110) silicon ([P]?5×10¹⁹ cm^-3) were measured for …..

Author: Guazzoni, Guido E.¹

Source: Applied Spectroscopy, Volume 26, Issue 1, Pages 1-113 (January/February 1972) , pp. 60-65(6)

Publisher: Society for Applied Spectroscopy

Abstract: Normal spectral emittance data are reported for solid specimens of the oxides of erbium, samarium, neodymium, and ytterbium… over the spectral range ..0.5-5.0 um and at sample temperatures from 1540 up to 1870 K.

The full text article is available for purchase at US$20.00 plus tax.

(CLICK ON GRAPH TO ENLARGE)
Almost everyone who attends the SPIE DSS Exposition has received a gold-plated paper clip from Mr. David Epner, personally. Well, the gold costing that Epner supplies to the optics industry has some interesting infrared reflectance (and emittance) properties.

Those properties, specifically the hemispherical spectral reflectivity in the near, mid and far infrared is now available for all to view first hand on the Epner website. A copy of the curve and the data related to it can be downloaded from the site, too.