photometer
英
[fəʊ'tɒmɪtə]
美
[foʊ'tɒmətə]
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Noun:
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measuring instrument for measuring the luminous intensity of a source by comparing it (visually or photoelectrically) with a standard source
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photographic equipment that measures the intensity of light
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用作名词 (n.)
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We must carry out the measuremnt with a photometer on an airplane.
要进行这种测量，我们必须使用一台装在飞机上的光度计。
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Photometer for measuring the directional light distribution characteristics of sources or luminaires.
测量光源或灯具定向光线分布特性的光度计。
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