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Definition
In photometry, Illuminance Meter is a device that measures the total luminous flux incident on a surface, per unit area. Illuminance is a measure of how much the incident light is spread over a given surface, wavelength-weighted by the luminosity function to correlate with the brightness perception of human eyes.
Introduction
There are many units for defining illuminance. The International System of Units defines using the unit of lux (symbol: lx) or lumens per square meter (cd sr m−2), which is most frequently used. In the centimeter-gram-second system, the unit of illuminance is the phot, which is equal to 10,000 lx. The foot-candle is a nonmetric unit of illuminance that is also used in photography. Illuminance is sometimes called brightness, but this leads to confusion with other uses of the word, such as brightness perception. Hence, “brightness” should never be used for quantitative description, but rather for describing the visual perceptions of...
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References
Butler, L.R.P., Laqua, K.: Nomenclature, symbols, units and their usage in spectrochemical analysis – IX. Instrumentation for the spectral dispersion and isolation of optical radiation. Pure Appl. Chem. 67(10), 1725–1744 (1995)
Finlayson, G., Fredembach, C., Drew, M.S.: Detecting illumination in images. In: Computer Vision, 2007. IEEE 11th International Conference on Computer Vision, ICCV 2007, pp. 1–8, 14–21 Oct 2007
Chung, T.Y.: Instrument Calibration Technique for Illuminance Meter of Absolute Radiometer System, 07-3-80-0086, 10th edn. Center for Measurement Standards/Industrial Technology Research Institute (2019)
Ohta, N., Robertson, A.R.: Colorimetry Fundamentals and Applications. Wiley, Chichester (2005)
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Wen, BJ., Wen, CH. (2020). Illuminance Meter. In: Shamey, R. (eds) Encyclopedia of Color Science and Technology. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-27851-8_357-2
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DOI: https://doi.org/10.1007/978-3-642-27851-8_357-2
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Chapter history
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Latest
Illuminance Meter- Published:
- 12 March 2020
DOI: https://doi.org/10.1007/978-3-642-27851-8_357-2
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Original
Illuminance Meter- Published:
- 29 September 2015
DOI: https://doi.org/10.1007/978-3-642-27851-8_357-1