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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Visual photometer is a simple instrument with measuring accuracy of ~10 % ( 0.1 mag ).
结构简单的目视光度测量器,准确度达百分之十 ( 0.1星等 ).
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The paper erects math model of determined ammomial nitrogen compound uncertainty by prismatic photometer.
建立了分光光度法测定水中氨氮含量的合成不确定度的数学模式.
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