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Array based goniospectroradiometer for measurement of spectral radiant intensity and spectral total flux of light sources.

Shaw, M J; Goodman, T M (2008) Array based goniospectroradiometer for measurement of spectral radiant intensity and spectral total flux of light sources. Appl. Opt., 47 (14). pp. 2637-2647.

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Abstract

This paper presents a description of a new goniospectroradiometric measurement system developed at the National Physical Laboratory. The instrument incorporates a modified array spectrometer mounted on a series of rotary stages to allow measurement of the spectral radiant intensity distribution of a variety of different types of light sources from 350 nm to 830 nm. Associated source properties such as chromaticity and correlated colour temperature distributions and total spectral flux are then calculated from the radiant intensity data. A preliminary comparison with NPL's integrating sphere based luminous flux scale shows agreement to within 0.4%, well within the combined measurement uncertainty. Measurements of the luminous intensity and colour temperature distributions and the spectral total flux of tungsten filament flux standard, a white LED cluster and a compact fluorescent source made using the goniospectroradiometer are also presented.

Item Type: Article
Keywords: Goniospectroradiometer, goniophotometer, spectral flux, luminous flux, radiant intensity, luminous intensity
Subjects: Optical Radiation and Photonics
Optical Radiation and Photonics > Photometry and Sources
Last Modified: 02 Feb 2018 13:15
URI: http://eprintspublications.npl.co.uk/id/eprint/4173

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