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在我们的日常生活中,光是不可缺少的一部分,光线照明所起的作用是,在揭示我们周围的世界时,为我们提供了弄清表面结构、外部形态、距离和色彩的线索。有了光线我们不仅能看清前面的东西和它们周围环境的关系,并以此形成了判断。 照明在人们生活中起了一种巧妙的感染作用,无形中影响着我们对待事物所产生的情感。人们眼睛所看到的是可见光谱中的一个整体而光谱之外的辐射是肉眼所察觉不到的,只有通过摄影机和各种测试仪器等方可记录下来。 人的视力有高度的适应能力,因此,必须经常区分肉眼认为自己看到的主观效果和未能所知的客观效果。如一只蜡烛的光线在一间很黑的房间里看起来何等明亮,而同是一支蜡烛所发出的光量放在灿烂的阳光下面却是何等暗淡无光。由于环境的不同因而产生的光效变化也不同。如,雪景中的蓝色阴影,用彩色胶片
Light is an indispensable part of our daily life. The function of lighting is to provide us with clues to the surface structure, external form, distance and color in revealing the world around us. With the light we can not only see the relationship between the front and their surroundings, but also form a judgment. Lighting plays an ingenious infectious role in people's lives, virtually affecting the emotions that we have to treat things. What the human eye sees is an integral part of the visible spectrum. Radiation beyond the spectrum can not be detected by the naked eye. It can only be recorded by cameras and various testing instruments. Human vision has a high degree of adaptability, therefore, the subjective effects perceived by the naked eye and the objective effects that can not be known by the naked eye must be often distinguished. How bright a candle's light looks in a very dark room, and how dark it is when a candle emits the same amount of light under the bright sunshine. Due to the different environment and the resulting changes in luminous efficiency is also different. For example, the blue shadow in the snow, with color film