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Elimination of reflection errors in emissometers by using alternate apertures.

Authors
Deardorff-DK
Source
Rev Sci Instrum 1976 Oct; 47(10):1279-1282
NIOSHTIC No.
10009951
Abstract
Modifications to an existing vacuum emissometer are described that allow mathematical elimination of reflecting errors of the specimen- window-specimen-detector type. Normal total emittance in the range 20 deg to 600 deg c can be determined. Successive radiance readings ls and ls' are obtained using alternate full- and reduced-size apertures. A separate run on a blackbody crucible allows determination of the corresponding lbb and lbb' values at the same temperature. The equation for true emittance is shown to be e = ls - ls' / lbb - lbb'.
CODEN
RSINAK
Publication Date
19761001
Document Type
OP; Journal Article
Fiscal Year
1977
NTIS Accession No.
NTIS Price
Identifying No.
OP 100-76
Issue of Publication
10
ISSN
0034-6748
NIOSH Division
ALRC
Source Name
Review of Scientific Instruments
State
OR
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