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- W2062590230 abstract "The checking of illuminance meters and luminance meters, following the recommendations issued by the International Commission of Illumination as to their frequency effects and their crest factor requires the use of a modulated luminous beam. A light source with light emitting diodes is suggested to carry out this check. It emits light sinusoidally modulated (frequency: from 10 Hz to 32 kHz) or in pulses of variable width (frequency: 100 Hz; duty cycle: 1/16 to 16/16) modulated in a constant average luminous flux, thanks to an electronic supply with logging control." @default.
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- W2062590230 date "1989-09-01" @default.
- W2062590230 modified "2023-09-27" @default.
- W2062590230 title "Light source with light emitting diodes. Determination of limited frequencies and of the crest factor of illuminance meters and luminance meters" @default.
- W2062590230 cites W1985567708 @default.
- W2062590230 doi "https://doi.org/10.1088/0150-536x/20/5/003" @default.
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