The lampshade can be divided into many types according to the material. Therefore, there is no specific specification for the lampshade advanced light transmittance meter. It is necessary to select a suitable advanced light transmittance meter according to different materials. Let's first take a look at the classification of lampshade
The lampshade is mainly divided into a plexiglass mask, a plastic mask, an acrylic mask, and the most commonly used acrylic, PC, PVC. In fact, acrylic also named PC, PVC is a kind of plastic. It is characterized by light weight, good light transmission, stable chemical properties (no yellowing due to chemical reaction with light and heat), so these three materials are the most widely used in the lampshade industry.
There are three design principles for the lampshade advanced light transmittance meters on the market, namely point source, parallel light and diffuse transmission. These three advanced light transmittance meters differ in their design principles, so their measurement accuracy and test materials are also different. For example, the glass lampshade has the worst light transmission in the material of all the lampshades, so when the light cover is tested for the light transmittance, the advanced light transmittance meters of three working principles can all be used. Only instruments made with the principle of parallel light and diffuse transmission will be more accurate. The data measured by the instrument with point-source is less accurate.
If the transparency in plastic and acrylic materials is very high (similar to the material of crystal glass), you can use the advanced light transmittance meter which adopt the parallel light or diffuse transmission design principle. If the material is translucent, or a rough surface, we should use the advanced light transmittance meter with diffuse transmission principle. Because this kind of instrument is more comprehensive, the test data is more accurate.
Therefore, we should choose the advanced light transmittance meter according to the lampshade of different materials.