Filter-radiometer-based realization of candela and establishment of photometric scale at UME

The luminous intensity unit of candela was realized based on filter-radiometer, which is traceable to detector-based primary standard electrical substitution cryogenic radiometer (ESCR). In that realization the traditional Osram Wi41/G-type incandescent lamp and filter-radiometer consisting of an ap...

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Bibliographic Details
Published in:Optics and lasers in engineering 2005-11, Vol.43 (11), p.1252-1266
Main Authors: Samedov, Farhad, Durak, Murat, Bazkır, Özcan
Format: Article
Language:English
Subjects:
Candela
Exact sciences and technology
Filter-radiometer
Instruments, apparatus, components and techniques common to several branches of physics and astronomy
Luminous intensity
Optical instruments, equipment and techniques
Optical power
Photometers, radiometers and colorimeters
Physics
Responsivity
Trap detector
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Summary:The luminous intensity unit of candela was realized based on filter-radiometer, which is traceable to detector-based primary standard electrical substitution cryogenic radiometer (ESCR). In that realization the traditional Osram Wi41/G-type incandescent lamp and filter-radiometer consisting of an aperture, a V ( λ ) filter and a silicon photodiode based trap detector were used as light source and detection element, respectively. Measurement techniques of effective aperture area, spectral transmittance of V ( λ ) filter and absolute responsivity of trap detector are also presented.
ISSN:0143-8166
1873-0302
DOI:10.1016/j.optlaseng.2004.12.001