Common sense of light td common sense of light td
1.自然光 将自然光透---过三棱镜照射在日幕上时，可以看到具有类似彩虹颜色的光，红、红黄、黄、黄绿、蓝绿、蓝、蓝紫、紫的顺序并列着，This is the so-called spectrum, which is the component of visible light.Light that cannot be discerned by the human eye, such as infrared light that makes people feel warm like skin and ultraviolet light that can make the film sensitive, are widely used in many industries.In visible light, the light that humans feel by their brightness is yellow-green light (550 nm).
2.Artificial light The so-called artificial light is the light composed of only the light necessary for human beings from the components of visible light, which will make the color rendering of the light different and affect the items seen.
3.色温度 色温度是指将物体加热，温度升高到某一程度时，颜色开始由深红→浅红→橙黄→白→蓝白→蓝逐渐改变，利用光色变化的特色，当某光源的When the light color is the same as the light color of the object, the absolute temperature of the object at that time is called the color temperature of the light source.When the color temperature is below 3000K (Kelvin), the light color is reddish with a warm feeling, and when the color temperature is 5000K, the light color is bluish with a cold feeling.
4.演色性 光源对于物体色彩呈现的程度称为演色性，也就是色彩的逼真程度，演色性越高的光源对色彩的表现越好，所看到的色彩也就越接近自然色，演色性越低The light sources performance of color is also worse, the greater the color deviation we see.The key to the level of color rendering is the "spectral characteristics" of the light. The wavelength of visible light is in the range of 380nm-760nm, that is, when we see the red and chili red dragon mouth in the spectrum when red orange, yellow, green, Blue, blue, indigo, and purple.If the proportion of each color contained in the light emitted by the light source is similar to that of natural light, the colors seen by our eyes will be more realistic.
5.Economic efficiency The efficiency of a light source is the value obtained by dividing the light speed of the light it emits by its power consumption: light source power (lm / w) = speed of light (lm) / power consumption (W).
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