ZB-B whiteness meter is an instrument used to measure the whiteness of solid materials.

Principle: It is based on the diffuse reflection principle of the integrating sphere, which means that the light emitted by the tungsten halogen lamp is converted into blue purple light through a condenser and a color filter, and shines on the integrating sphere. After slow reflection on the inner wall of the integrating sphere, it shines on the sample in the test hole. The reflected light from the sample is absorbed by the silicon photovoltaic cell after being combined by the condenser and color filter, and converted into an electrical signal. The other silicon photovoltaic cell receives the substrate signal inside the sphere,Two signals are mixed and processed, and the measurement results are displayed on the LCD screen