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WS-1 Diffuse Reflectance Standard |
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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. WS-1: $314. |
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WS-1-SL White Reflectance Standard with Spectralon |
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The WS-1-SL is a diffuse reflectance standard from
Labsphere and is made from their patented diffuse reflectance
material, Spectralon. Spectralon is hydrophobic and is thermally
stable to 350 °C. The durable material provides highly accurate,
reproducible data. Unlike all the other PTFE-based standards on this
page, the WS-1-SL often can be smoothed, flattened and cleaned if
nicked or soiled. WS-1-SL: $346 |
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WS-1-SS White Standard with Stainless-steel Housing |
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The WS-1-SS comes in a stainless steel housing and
has the same properties as the WS-1. In addition, the surface of the
WS-1-SS is slightly recessed to allow the RPH-1 Reflection Probe
Holder to sit on the standard without coming in direct contact with
the standard’s surface. WS-1-SS: $469 |
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WS-3-GEM White Standard |
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Conceived for use in colorimetric
applications involving diamonds and other gems, the WS-3-GEM White
Reference Tile
consists of a diffuse PTFE-based material, shaped to form a holder within
its stainless steel receptacle. Because of its concave shape, the WS-3-GEM
becomes an integrating sphere when illuminated.
The WS-3-GEM has >98% reflectivity from 400-1500 nm and >95% reflectivity from 250-2000 nm. Like the WS-1, the WS-3-GEM's reflectance material is hydrophobic, chemically inert and very stable, even in deep-UV applications. WS-3-GEM: $627 |
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| Specification | WS-1 | WS-1-SL | WS-1-SS | WS-3-GEM |
| Dimensions housing: | 38 mm diameter | 38 mm diameter | 38 mm diameter | 38 mm diameter |
| Dimensions tile: | 32 mm OD, 10 mm thick |
32 mm OD, 10 mm thick |
32 mm OD, 10 mm thick |
31 mm OD, 10 mm thick |
| Weight: | 30 g | 30 g | 30 g | 70 g |
| Spectral range: | 250-2000 nm | 250-2500 nm | 250-2000 nm | 250-2000 nm |
| Housing: | Aluminum | Delrin holder, protective cover | Stainless steel | Stainless steel |
| Reflectivity: | >98%
(250-1500 nm) >95% (250-2200 nm) |
99%
(400-1500 nm) >96% (250-2000 nm) |
>98%
(250-1500 nm) >95% (250-2200 nm) |
>98%
(250-1500 nm) >95% (250-2200 nm) |
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