The roughness of the tungsten wire surface has a certain influence on the luminous effect, which is mainly reflected in the following aspects:
- Light scattering and reflection
When the surface roughness of the tungsten wire is high, there are more tiny bumps and depressions on its surface. These uneven surface structures will cause light to scatter on the surface of the tungsten wire, so that some light cannot propagate in the expected direction, thereby reducing the luminous efficiency. On the contrary, when the surface of the tungsten wire is smooth, the light is more likely to be reflected by the mirror on its surface, making the light more concentrated and improving the luminous effect.
- Heat conduction and heat dissipation
Tungsten wire will generate a lot of heat during the luminous process. If the heat cannot be dissipated in time, it will cause the temperature of the tungsten wire to rise, which will affect its luminous effect and life. The roughness of the tungsten wire surface will affect its thermal conduction and heat dissipation performance. The rough surface will increase the resistance of heat conduction, making it more difficult for heat to be transferred from the inside of the tungsten wire to the external environment. The smooth surface is more conducive to the rapid dissipation of heat, thereby keeping the tungsten wire working at a lower temperature. , improve its luminous efficiency and life.
- Current distribution and resistance
The roughness of the tungsten wire surface may also affect the distribution of current and the size of resistance. The rough surface may cause uneven distribution of current on the surface of the tungsten wire, making the current density in some areas too large, generating too much heat, and thus affecting the luminous effect and life. The smooth surface is more conducive to the uniform distribution of current, reducing the generation of heat and improving the luminous efficiency.
- Considerations in practical applications
In practical applications, in order to obtain better luminous effects, tungsten wires with smooth surfaces and low roughness are usually selected. At the same time, it is also necessary to pay attention to the influence of factors such as the purity, diameter, and length of the tungsten wire on the luminous effect in order to comprehensively optimize the performance of the bulb.
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