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Optical Engineering

Optical power and transmittance measurements and their use in detector-based realization of the luminous intensity scale
Author(s): Petri Kaerhae; Antti Lassila; Hanne Ludvigsen; Farshid Manoochehri; Heidi Fagerlund; Erkki Ikonen
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Paper Abstract

Responsivity calibrations of trap detectors with a cryogenic absolute radiometer and a power-stabilized 543.51 6-nm He-Ne laser are described. The trap detectors are used as transfer standards of optical power at visible wavelengths because they have a predictable spectral responsivity. New results on transmittance measurements of PRC Krochmann V(λ) filters are presented, especially the angle and temperature dependence of the transmittance. The characterized trap detector and the V(λ) filter are used for a novel realization of the SI base unit of luminous intensity, the candela. Test measurements indicate a good agreement with previous photometric scales.

Paper Details

Date Published: 1 September 1995
PDF: 8 pages
Opt. Eng. 34(9) doi: 10.1117/12.208095
Published in: Optical Engineering Volume 34, Issue 9
Show Author Affiliations
Petri Kaerhae, Helsinki Univ. of Technology (Finland)
Antti Lassila, Helsinki Univ. of Technology (Finland)
Hanne Ludvigsen, Helsinki Univ. of Technology (Finland)
Farshid Manoochehri, Helsinki Univ. of Technology (Finland)
Heidi Fagerlund, Helsinki Univ. of Technology (Finland)
Erkki Ikonen, Helsinki Univ. of Technology (Finland)

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