Analysis of the Spectral Sensitivity of Luxmeters and Light Sensors of Smartphones in Terms of Their Influence on the Results of Illuminance Measurements—Example Cases

Przemyslaw Tabaka () and Justyna Wtorkiewicz
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Przemyslaw Tabaka: Institute of Electrical Power Engineering, Lodz University of Technology, 90-537 Lodz, Poland
Justyna Wtorkiewicz: Laboratory of Physicochemistry, Regional Office of Measures in Lodz, 90-132 Lodz, Poland

Energies, 2022, vol. 15, issue 16, 1-21

Abstract: The article presents spectral sensitivity curves of 22 typical luxmeters and 3 smartphones as a result of laboratory measurements. Based on the measurement data, errors in the spectral correction of the considered instruments and devices were calculated. Due to the fact that the value of the measured illuminance is influenced by the spectral characteristics of the radiation, in order to determine the spectral corrections coefficients, 10 light sources with different spectral distributions of radiation were taken into account. Spectral corrections factors were determined using two methods for all luxmeters and smartphones. This paper presents the relationship between the shape of the spectral sensitivity curves of a given luxmeter and the measured values of f′ 1 errors. Moreover, the limitations related to the use of spectral corrections in environmental measurements with the use of a luxmeter were demonstrated.

Keywords: illuminance; illuminance meter; photometric head; spectral correction; spectral correction error; spectral sensitive curve; smartphone; light source (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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