Spectral emittance of refractory materials

Spectral emittance of refractory materials
Henry H. Blau, Jr. and John R. Jasperse
Applied Optics, Vol. 3, Issue 2, pp. 281-(1964)

Citation
H. H. Blau, Jr.and J. R. Jasperse, "Spectral emittance of refractory materials," Appl. Opt. 3, 281- (1964)

Spectral emittance of optical materials

Infrared spectral emittance measurements of optical materials
D. L. Stierwalt
Applied Optics, Vol. 5, Issue 12, pp. 1911-(1966)

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Citation
D. L. Stierwalt, "Infrared spectral emittance measurements of optical materials," Appl. Opt. 5, 1911- (1966)

The RET Theory

Ircon, Inc., a leading producer of industrial radiation thermometers, line scanners and quantitative thermal imagers, in its training programs for many years used to teach something they called the RAT Theory.

Reflectance, Absorbtance and Transmittance, or the coefficients of them, abbreviated as R, A &T must sum to 100%, or R + A + T=1.

An easy way for newcomers to Infrared radiation thermometry to remember a very important concept.

The associated concept is that Absorbtance=Emittance, or A=E. Or the RAT theory could be written as R+E+T=1 and renamed the RET Theory.

So, while not as easily recalled, the RET Theory name just didn't catch on as easily as the RAT Theory.

(BTW, whenever I tried to teach some basics of Radiation Thermometry, I used to call it the TAR Theory because I thought it might "stick" better- it didn't - RAT wins by a landslide every time.)

All this is a lead in to the wonderful resources by the folks at  LabSphere for those who want to know or learn how to measure emittance or absorbtance through the roundabout way of measuring reflectance and transmittance first and then doing a bit of math.

They have a readily downloadable 26 page PDF document entitled "A Guide to Integrating Sphere Radiometry and Photometry".

It explains far more than the RAT or RET or TAR theories about optical radiation metrology.

I think it and many of their online aids are well worth a read.

Spectral emittance: powders

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)

Determining the emittance of solids

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 emittance of particulate materials

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

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)