The WS-1 Diffuse Reflectance Standard is made of PTFE, a diffuse white plastic that provides a Lambertian reference surface for reflectance experiments. The WS-1 comes in an anodized aluminum housing, and is hydrophobic, chemically inert and very stable, even in deep-ultraviolet applications. It is >98% reflective from 250-1500 nm and >95% reflective from 250-2200 nm. The reflective area of the WS-1 has a 32 mm OD. The diffusing material is encased in a small receptacle with screw-on top. The material is almost uniformly reflective (>95%) by wavelength across the entire range of 250-2000 nm.
|Dimensions:||38 mm diameter (housing)||32 mm OD, 10 mm thick (tile)|
|Weight:||30 g||30 g|
|Spectral range:||250-2000 nm||250-2500 nm|
|Reflectivity:||>98% (250-1500 nm)>95% (250-2200 nm)||99% (400-1500 nm)>96% (250-2000 nm)|