英语词汇“illuminance”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	illuminance
释义	illuminance Optics.\|ɪˈl(j)uːmɪnəns\| [f. L. illūmin-āntem (see illuminant a. and n.) + -ance.] The amount of luminous flux per unit area; = illumination 1 b. 1943D. H. Jacobs Fund. Optical Engin. iv. 66 We have derived equations that give the illumination (or illuminance) only at points on the axis of the system.1949H. Margenau et al. Physics Princ. & Applications xliv. 621 Illuminance is expressed in lumens/ft² (foot candles) or lumens/m² (luxes).1955R. C. Brown Textbk. Physics IV. l. 902 The illumination (sometimes called ‘intensity of illumination’ and also illuminance) of a surface is defined as the luminous flux incident per unit area on the surface.1961F. W. Weymouth in Hirsch & Wick Vision Aging Patient iv. 41 Since the extent of dark adaptation is..curtailed with age, the performance at low levels of illuminance begins to decline even before the age of 40 years.1970Nature 24 Jan. 347/2 Each pattern..was projected.. at an average screen illuminance of 3 millilamberts.
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