luxmetern.
/ˈlʌksmiːtə/ An instrument for measuring the luminance (brightness) or illuminance (illumination) of a surface.
ΘΚΠ
the world > matter > light > illumination > [noun] > instrument for measuring
luxmeter1910
lumeter1911
the world > matter > physics > electromagnetic radiation > light > intensity of light, luminosity > [noun] > degree of intensity > instrument
photometer1779
photoscope1872
spectrophotometer1881
light meter1889
Hefner1891
illuminometer1895
luxmeter1910
lumeter1911
telephotometer1915
1910 H. M. Hobart Dict. Electr. Engin. II. 319/2 Luxmeter, photometric. This is a photometer of the ‘cat's-eye type’.
1912 W. C. Clinton tr. L. Bloch Sci. of Illumination v. 101 A further development..in the direction of greater portability and lightness has been made in the luxometer.
1915 Gaster & Dow Mod. Illuminants vii. 261 Another small instrument of the surface-brightness type, the ‘Luxometer’, has recently been introduced.
1932 Proc. Internat. Illumination Congr., 1931 I. 215 Two types of luxmeter have been studied: the luxmeter with a scale of illuminations, and the luxmeter with a single comparison illumination, controllable either by the distance of the lamp or by the interposition of a photometric wedge.
1967 E. Chambers Photolitho-offset vii. 85 Meters can be purchased for measuring the number of Lux (luxmeters) or [printed of] foot-candela (foot-candela meters).
This entry has not yet been fully updated (first published 1976; most recently modified version published online December 2020).
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n.1910