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absorptance

   Also found in: Acronyms, Wikipedia 0.01 sec.
ab·sorp·tance  (b-sôrptns, -zôrp-)
n.
The ratio of absorbed to incident radiation.
[absorpt(ion) + -ance.]
ThesaurusLegend:  Synonyms Related Words Antonyms
Noun1.absorptance - a measure of the rate of decrease in the intensity of electromagnetic radiation (as light) as it passes through a given substance; the fraction of incident radiant energy absorbed per unit mass or thickness of an absorber; "absorptance equals 1 minus transmittance"
absorption coefficient, coefficient of absorption
coefficient - a constant number that serves as a measure of some property or characteristic
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Four correction factors were used: the LOCR window transmittance (TW), the LOCR receiver absorptance (AR), the relative aperture transmittance (TA), and the LOCR electrical calibration (kL).
Intramural comparison of NIST laser and optical fiber power ... by Hadler, Joshua / Journal of Research of the National Institute of Standards and Technology
Both can be used for the electrical substitution equivalence measurement and their separate positions allow checking the effectiveness of the heating system for equivalence of optical and electrical power absorptance by the cavity.
The candela and photometric and radiometric measurements by Parr, Albert C. / Journal of Research of the National Institute of Standards and Technology
To extend the uncertainty analysis to the NIR, one has to check the absorptance by the chromium oxide coated receiver cavity in the NIR.
Improved Near-Infrared Spectral Responsivity Scale by Lykke, Keith R. / Journal of Research of the National Institute of Standards and Technology
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