Nowadays lighting industry has developed rapidly, but the use of unreasonable phenomenon also more and more light. Sometimes, the causes of light pollution is very simple. So, in the lighting design, it is particularly important to understand the basic principle of optical.
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Like above installation wash wall lamp, originally want to spend bit of idea make a good design. But ignored the metope of specular reflection, as a result, just to wash down, but the people in the following article will see light reflective particles.
Like the picture described above, in specific scenarios of reading, for example, careless slightly, will be destroyed by the reflection paper reading.
So, rather than design have difficulty scratching his head cannot be solved, it is better to start with the good source school principle, avoid because of the reflection on the back of your design.
Light reflection, can be said to be the most important part of the optical. Also because the reflection we can see the colorful world. Light all the time in reflection, illuminates the sunlight from the window came in, fell on the ground, the light and diffuse to the other direction, on the ground as a result, the whole room is bright.
Under normal circumstances, only a portion of land on the surface of the light is reflected, the reflection of the amount depends on the type of surface, the Angle of the incident light and light spectrum. Scope of reflection from the surface of the dark, such as black velvet in less than a few percent to aluminum, silver and other types of more than 90% of white paint.
Reflection can be divided into three kinds: mirror reflection, diffuse reflection and mixed reflection:
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1 mirror reflection
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Specular reflection occurs on a smooth surface, such as static or polishing the surface of the glass of water. The Angle of the incident light Angle is equal to the launch. This is called the mirror reflection. When need precise control of light, often using mirror reflector. Omni mirror reflector of the vehicle, for example, indoor lighting lamps and lanterns and depends on the shape of the mirror (spherical, elliptic, parabolic) and the position of the light source, can be easily manufactured (distributed, parallel, or of the convergent type) beam.
2 diffuse
Diffuse reflection, if a little irregular surface, the incident light can go in all directions, downy light, this reflection is called diffuse reflection.
3 mixed reflection
Mixed reflection and specular reflection and diffuse reflection have many mixed form:
1. Spread reflection, it is essentially a diffuse, but reflected form dispersed beam. The wet pavement is a good example. On the surface of corrugated surface, pounding, corrosion surface or tarnish on the surface, all make a divergent reflection.
2. Composite reflection, that is, a strong component of diffuse and specular direction. In matt paint surface, stone, dry pavement, produces this kind of reflection.
3. The total internal reflection, when the light is totally reflected, called total internal reflection. For total internal reflection, must meet the principle of two conditions:
1. The light from the light to medium to light thin medium;
2. The incident Angle is bigger than what we call a critical Angle.
