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Spectral Characteristics of Light Sources for Fading and Degradation Testing
Author(s) -
COOPER B. S.,
HAWKINS F. S.
Publication year - 1949
Publication title -
journal of the society of dyers and colourists
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.297
H-Index - 49
eISSN - 1478-4408
pISSN - 0037-9859
DOI - 10.1111/j.1478-4408.1949.tb02535.x
Subject(s) - incandescent light bulb , fading , materials science , spectral power distribution , intensity (physics) , tungsten , degradation (telecommunications) , optics , sunlight , electric arc , chemistry , physics , electrode , telecommunications , computer science , metallurgy , decoding methods
The spectral distribution of energy in the visible and ultra–violet regions has been measured for the enclosed carbon are commonly employed in fading test apparatus. Tests have boen made on both D. C. and A. C. arcs, and the effect of electrical loading, asymmetrical polar distribution, and obscuration of the enclosing globe has been investigated. Certain data are also presented for the high–intensity carbon arc and for three types of metal–vapour electric discharge lamp likely to be suitable for photochemical work. Comparison is made with incandescent tungsten sources and with sunlight for corresponding spectral regions.