isoluxadj.
/ˈʌɪsəʊlʌks/ = isophotal adj.
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the world > matter > physics > electromagnetic radiation > light > intensity of light, luminosity > [adjective] > relating to isophotes
isophotal1904
isolux1911
isophotic1931
1911 A. P. Trotter Illumination iv. 47 (heading) Contour lines of equal illumination or iso-lux curves, due to two lights at a distance apart equal to four times their height.
1926 J. W. T. Walsh Photometry iv. 99 An iso-lux diagram may be used to obtain a mental conception of the effect of a given system of light sources of known distribution.
1934 Archit. Rev. 75 66 (caption) Isolux diagram. This should be read similar to a contour map, the rings representing foot candle intensities on a plane 2 ft. 6 in. above the floor.
1967 E. Chambers Photolitho-offset xi. 164 With the glass screen the unit dots grow by exposure to a graded pattern formed by diffraction effects and..their contour shapes follow the isolux lines of equal intensity.
This entry has not yet been fully updated (first published 1976; most recently modified version published online December 2020).
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adj.1911