The STAN-SSL Low-reflectivity Specular Reflectance Standard is a black glass standard that can be used as a reference when measuring surfaces with low specular reflectance values such as thin film coatings, anti-reflective coatings, blocking filters and substrates. The coated surface of the STAN-SSL provides an ~4.0% reflectance across the 200-2500 nm wavelength range. |
Substrate Dimensions: | 1.25" outer diameter x 0.25" height |
Housing Dimensions: | 1.5" outer diameter x 0.75" height |
Reflectance material: | Black glass |
Reflectivity: |
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The STAN-SSH High-reflectivity Specular Reflectance Standard is a mirrored, fused-silica standard that can be used as a reference when measuring surfaces with high specular reflectance values such as optical substrates, optical coatings, machined metals and semiconductor materials. The STAN-SSH provides an ~85-90% reflectance across the 250-800 nm wavelength range and an ~85-98% reflectance across the 800-2500 nm range. |
Substrate Dimensions: | 1.25" outer diameter x 0.25" height |
Housing Dimensions: | 1.5" outer diameter x 0.75" height |
Reflectance material: | Mirrored, fused-silica with protective overcoat |
Reflectivity: |
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WS-1 Diffuse Reflectance Standard | |
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. |
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WS-1-SL White Reflectance Standard with Spectralon | |
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. |
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WS-1-SS White Standard with Stainless-steel Housing | |
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. |
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WS-3-GEM White Standard | |
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. |
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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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