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An Integrating Sphere is a hollow spherical cavity whose inner wall is coated w
An Integrating Sphere is a hollow spherical cavity whose inner wall is coated with a white diffuse-reflectance material, also known as a photometric sphere or Ulbricht sphere. One or more apertures in the sphere wall serve as the light-input port and detector port. The interior is coated with an ideal diffuse reflector—such as PTFE foam coating or gold plating—mixed with a binder and sprayed onto the wall. With >99% reflectance across the visible spectrum, incoming light undergoes multiple reflections, creating a uniform irradiance on the inner surface.
The DWT-R Diffuse Reflectance Standard Whiteboard is precision-molded from imported PTFE, offering waterproof performance and resistance to yellowing or powder loss over time. It serves as the Lambertian reference for 200–2500 nm wavelengths. Calibrated by the National Institute of Metrology with spectral reflectance data, it provides a standard reference for measuring the optical properties of other samples.
● Spectral range: 200–2500 nm;
● Reflectance: >99%;
● Aluminum alloy housing with sand-blasted, anodized finish;
● Imported PTFE material, high-temperature molded;
● Lambertian diffuse reflector, obeys cosine law;
● Waterproof, no powder loss or yellowing;
● National metrology standard;
● Ideal for instrument calibration and reflectance reference;
Instrument calibration, reflectance measurement references, building diffuse-reflectance test systems.
| Parameter | Unit | Value |
|---|---|---|
| Wavelength Range | nm | 200–2500 |
| Diameter | mm | 30/50/80 |
| Material | — | Imported PTFE |
| Reflectance | % | >99% |
| Housing | — | Aluminum alloy (sand-blasted, anodized) |
Spectra Light & Power can provide customized integrating sphere solutions to meet specific application needs. Contact us for tailored designs.
