Product Presentation The diffuse reflection standard white board has higher stability than other standard boards. It is suitable for the wide spectrum of ultraviolet-visible-near infrared (250-2500nm) with a reflectance ratio of up to 99%. The diameter of the diffuse reflection standard white board is 38mm and 27mm, and the size can be customized according to the needs. It is made of imported PTFE material and processed at high temperature. It has waterproof function and will not fall powder or turn yellow over time. It is the most commonly used Lambertian reflector in the wavelength range of 250-2500nm. The diffuse reflection standard white board can be combined with a spectrometer and a light source to form a diffuse reflection test system, which is suitable for measuring the reflectivity of various samples, such as silicon wafers, ceramics, frosted glass, plastics, etc.