The transmittance of the lampshade is mainly determined by the following factors:
1. * * Material * *: The material of the lampshade has a direct impact on its light transmittance. For example, glass lampshades typically have higher light transmittance compared to plastics such as PC or PMMA, but are more fragile. Transparent plastic lampshades have a higher light transmittance, while lampshades with added frosting, texture, color powder, or other diffusion materials will have a lower light transmittance.
2. * * Surface treatment * *: The surface treatment method of the lampshade, such as frosting or matte treatment, will scatter light, reduce the transmission of direct light, lower the transmittance, but can provide a more uniform and soft lighting effect.
3. * * Color *: The color of the lampshade is also an important factor. Dark or colored lampshades will absorb more light, leading to a decrease in light transmittance. For example, a milky white lampshade may reduce light transmittance by more than 10% compared to a transparent lampshade.
4. * * Thickness * *: The thickness of the lampshade also affects the transmittance. Generally speaking, the thicker the lampshade, the greater the loss of light when passing through, and the lower the transmittance.
5. Internal structure: If there are ribs, patterns, or other structures inside the lampshade, these elements will also block or scatter light, affecting the transmittance.
6. * * Manufacturing process * *: The manufacturing process of the lampshade, including steps such as molding and polishing, can also affect the transparency quality of the final product.
Understanding the transmittance of lampshades is crucial for the correct selection and use of lighting equipment, especially in situations that require specific lighting effects and brightness control. In order to accurately measure transmittance, specialized transmittance meters can be used, which can provide accurate transmittance data based on specific optical principles.
