From the category archives:

Solids & Liquids

What the Heck is (Spectral) Emissivity?

February 10, 2010

Part One of Two from the mind of FLIR
It starts:
Fill two soda cans with hot water and wrap one with scotch tape. Which one will radiate more heat?
You might be surprised at the answer
(It has all to do with Spectral Emissivity, although this video continues the illusion that it’s really simple “Emissivity” at work! The [...]

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ASTM E307 – 72(2008) Standard Test Method for Normal Spectral Emittance

December 8, 2009

At Elevated Temperatures
Developed by ASTM Subcommittee: E21.04, on Space Simulation Test Methods, and in the Annual Book of ASTM Standards, Volume 15.0 Space Simulation; Aerospace and Aircraft; Composite Materials

Quoting from the standard’s Scope:
1. Scope
1.1 This test method describes a highly accurate technique for measuring the normal spectral emittance of electrically conducting materials or materials [...]

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Table of Emissivities in Three Popular Spectral Regions

May 9, 2009

The Table of Emissivity on the INFRAPOINT Messtechnik GmbH website (Click here to visit) has summary data for a wide variety of materials broken down into three distinct spectral regions for the wavelength regions where the majority of infrared radiation thermometers and Infrared Thermal Imaging cameras operate.
First and second are tables that deal with the [...]

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Spectral emissivity of skin and pericardium

May 5, 2009

Spectral emissivity of skin and pericardium by J Steketee 1973 Phys. Med. Biol. 18 686-694 doi: 10.1088/0031-9155/18/5/307 Help
J Steketee, Department of Biological and Medical Physics, Erasmus University, Rotterdam, The Netherlands
Abstract.
A monochromator was modified to measure the emissivity, ?(?), of living tissue in the infrared region between 1 and 14 ?m. [...]

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Non-contact skin emissivity: measurement from reflectance

May 5, 2009

Reference Title:Non-contact skin emissivity: measurement from reflectance using step change in ambient radiation temperature Citation: T Togawa 1989 Clin. Phys. Physiol. Meas. 10 39-48 doi: 10.1088/0143-0815/10/1/004
Article by T Togawa of Inst. for Med. & Dental Eng., Tokyo Med. & Dental Univ., Japan
Abstract.
A method of estimating skin emissivity based on reflectance [...]

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Temporal variations in the apparent emissivity of various materials

March 4, 2009

Temporal variations in the apparent emissivity of various materials
Author: Salvaggio, C.; Miller, D.P.
Author URL: www.cis.rit.edu/~cnspci/publications/5425-29.pdf
Year: 2004
Abstract:
Spectral emissivity measurements gathered in the longwave infrared region of the spectrum during a recent airborne hyperspectral data collection experiment indicated that the spectral emissivity of certain organic polymers changed by as much as 10% throughout the day. Inorganic and [...]

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Portable Fourier transform infrared spectroradiometer for field measurements of radiance & emissivity

February 24, 2009

By Andrew R. Korb, Peter Dybwad, Winthrop Wadsworth, and John W. Salisbury
ABSTRACT
A hand-held, battery-powered Fourier transform infrared spectroradiometer weighing 12.5 kg has been developed for the field measurement of spectral radiance from the Earth’s surface and atmosphere in the 3–5-µm and 8–14-µm atmospheric windows, with a 6-cm21 spectral resolution. Other versions of this instrument measure [...]

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Thermophysical properties and normal spectral emittance of Iridium up to 3500 K

February 9, 2009

“Thermophysical properties and normal spectral emittance of Iridium up to 3500 K”,
International Journal of Thermophysics Vol. 28(2), p. 697-710, http://dx.doi.org/10.1007/s10765-007-0188-9, (2007) by C. Cagran, G. Pottlacher
C. Cagran1 and G. Pottlacher1 Contact Information
(1) Institute of Experimental Physics, Graz University of Technology, Petersgasse 16, 8010 Graz, Austria
Published online: 10 May 2007
“An ohmic pulse-heating experiment together with [...]

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Modeling of the thermal radiative behavior of rough coatings

January 6, 2009

Abstract 675 – Monte Carlo modeling of the thermal radiative behavior of rough coatings
Presented in the session Photothermal Techniques. Theory and Modeling at the 18th European Conference on Thermophysical Properties, Pau, France 31 Aug-4 Sep 2008
By:
Mr Hector Gomarta*+
Dr Benoit Rousseaua
Dr Domingos De Sousa Menesesa
Dr Patrick Echeguta
a CNRS Orléans
CEMHTI
Site Haute Température
1D avenue de la Recherche [...]

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