Product overview

 The standard reference plate for diffuse reflection is made of international standard material PTFE by special technology and has good diffuse reflection characteristics. By adding only a small amount of black material in the developed reference body, a standard reference plate with a certain gray scale can be obtained, and the optical characteristics are similar to those of a high reflective reference plate. By detecting the spatial reflection distribution characteristics of the diffuse reflection reference body / target, the quantized parameters of the product direction - hemispherical reflection ratio DHR (directional hemisphere reflectance) and the bidirectional reflectance factor BRF (bidirectional reflectance factor) are provided for the end users. The features of the product are as follows ：

 The whiteboard has a high reflectivity ；

 With better spectral flatness ；

 With better spatial distribution characteristics ；

 Traceability to the national standard of China National Metrology Institute .

 The product is specially designed for aluminum alloy box, suitable for field spectrum measurement and transportation protection.

Physical picture

     The diffuse reflectance standard reference plate (reflectivity 99%) of different specifications is shown in Figure 1, and the standard reference plate of 500mm * 500mm specs is as shown in Figure 2.

 Fig. 1 diffuse reflectance standard reference plate with different specifications (reflectivity 99%)

 Figure 2 gray scale of standard reference plate with different reflectivity

Product index ：

 The technical specifications of the diffuse reference standard plate are as follows：

 Spectral range ：400nm～2500nm；

 Effective optical size ：250mm×280mm；400mm×400mm；500mm×500mm；

1000mm×1000mm；1200m×1200m；

 Directional hemispherical reflection ratio （@550nm）：2±0.5%；5±1%；10%；20%；30%；40%；50%；60%；70%；80%；90%；99%。

 Surface inhomogeneity: better than 1% ；

 Fig. 3 the directional hemispherical reflectivity of gray scale diffuse reflection standard reference plate