What role does a borosilicate glass lens play in cob street light?

Excellent thermal shock resistance: Borosilicate glass has a very low thermal expansion coefficient, approximately one-third of that of ordinary glass. When the temperature changes, its volume changes less, and as a result, the temperature gradient stress inside the lens is also reduced. This thermal shock resistance enables the borosilicate glass lens to remain stable under extreme weather conditions, reducing the risk of cracking or breaking due to temperature changes. In the use of cob street light, especially under extreme weather conditions, this thermal shock resistance ensures the stability and durability of the lens.
Good optical performance: Borosilicate glass has a low refractive index. Refractive index is a physical quantity that measures the change in direction of light when it propagates in a medium. For lenses, the size of the refractive index directly affects the focusing and dispersion of light. Due to the low refractive index of borosilicate glass, light can maintain a more stable and concentrated propagation path when passing through the lens, thus avoiding excessive dispersion and blurring of light. Additionally, borosilicate glass has low dispersion. Dispersion refers to the separation phenomenon that occurs when light passes through a medium due to the different refractive indices of different wavelengths of light. For cob street light, excessive dispersion can lead to color separation in the light during propagation, affecting the lighting effect. However, the low dispersion of borosilicate glass ensures that the light maintains high color purity during propagation, making the lighting effect clearer. Furthermore, borosilicate glass has good optical transparency. Transparency is a measure of a material's ability to transmit light. For lenses, the higher the transparency, the greater the light transmittance and the better the lighting effect. Borosilicate glass has high optical transparency, ensuring that light loss is minimal during transmission, improving the energy efficiency of cob street light.
Excellent corrosion resistance: In outdoor environments, streetlight lenses often face erosion from various natural factors such as acid rain, sandstorms, and salt fog. These environmental factors often contain corrosive substances such as acids, alkalis, and salts, which can cause spots, blurring, or even cracking on the lens surface, severely affecting the lighting effect and service life of cob street light. However, borosilicate glass lenses can maintain stable performance in these corrosive environments. Its chemical structure allows it to effectively resist the erosion of acids, alkalis, and other corrosive substances, maintaining the clarity and transparency of the lens surface. Even when exposed to harsh environments for a long time, borosilicate glass lenses can still maintain their original optical performance, ensuring the lighting effect and service life of cob street light. Moreover, the corrosion resistance of borosilicate glass lenses can also reduce the maintenance cost of cob street light. Since it can resist corrosion, the damage and aging rate of the lens surface are slower, reducing the frequency of lens replacement. This not only reduces maintenance costs but also minimizes lighting interruptions and safety hazards caused by lens replacement.
Good mechanical performance: Borosilicate glass has excellent mechanical strength and hardness. This material undergoes special treatment during manufacturing, resulting in a dense and sturdy internal structure that can withstand significant external forces and pressure. Therefore, even when accidentally collided or compressed during the use of cob street light, borosilicate glass lenses can maintain their integrity and are unlikely to break or damage. Borosilicate glass lenses have high compressive strength and bending strength, allowing them to withstand pressure and bending forces from various directions without significant deformation or breakage. Borosilicate glass lenses perform well in dealing with various complex external forces, such as strong winds, vibrations, and even human factors like traffic accidents. The excellent mechanical performance of borosilicate glass lenses is also reflected in their abrasion resistance and scratch resistance. Due to their high surface hardness, they are not easily scratched or worn, enabling them to maintain their original smoothness and clarity even after long-term exposure to outdoor environments and erosion from factors such as dust and rainwater.