Macbeth illuminometer

[mək′beth ə‚lüm·ə′näm·əd·ər] (optics) A type of portable visual photometer in which the light to be measured is balanced by a Lummer-Brodhun sight box against a comparison lamp, whose apparent brightness can be varied by moving it along a tube; a control box supplies a calibrated current to the comparison lamp, and calibrated optical filters can be placed in the light paths to correct for color differences in the comparison and measured sources and to extend the range of the instrument.

单词	macbeth illuminometer
释义	Macbeth illuminometer Macbeth illuminometer [mək′beth ə‚lüm·ə′näm·əd·ər] (optics) A type of portable visual photometer in which the light to be measured is balanced by a Lummer-Brodhun sight box against a comparison lamp, whose apparent brightness can be varied by moving it along a tube; a control box supplies a calibrated current to the comparison lamp, and calibrated optical filters can be placed in the light paths to correct for color differences in the comparison and measured sources and to extend the range of the instrument.
随便看	usnavak us naval academy us naval battalion aid station us naval chemical downwind message us naval computer and telecommunications station, iceland us naval effective downwind message us naval forces, southern command us naval observatory us naval reserve corps us naval training usnavcent usnaveur usnavhosp usnavmilcomun usnavoff usnavspecwarcen us navy us navy medium to heavy twin amphibious aircraft used for maritime patrol, water bomber, and search and rescue usnavymilcomuno us navy-naval air sea systems command us navy radio and sound laboratory us navy recruit training command us navy reporting officer us navy travel instructions usnb