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Assessment of smoke density with a helium–neon laser
Author(s) -
Clark Ferrers R. S.
Publication year - 1985
Publication title -
fire and materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.482
H-Index - 58
eISSN - 1099-1018
pISSN - 0308-0501
DOI - 10.1002/fam.810090105
Subject(s) - monochromatic color , neon , helium , optics , laser , smoke , light source , atomic physics , physics , materials science , meteorology , argon
Smoke‐obscuration of monochromatic (0.632μm) light helium‐neon lasers and of broad‐band continuum light a hot tungsten filament is reported. The effect of forward‐scattered light is evaluated for the monochromatic source, and the degree to which the Bouguer law is obeyed for a non‐monochromatic source is discussed. Practical experience with both small‐scall and fire experiments is described.