Spectraflect^® White Reflectance Coating

FEATURES:

• High Reflectance
• Highly Lambertian
• Optically Stable
• Non-Toxic

APPLICATIONS:

• UV-VIS-NIR Applications
• Optical Components
• Integrating Spheres
• Lamp Housings

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Labsphere's Spectraflect^® coating is a proprietary, high-reflectance coating that is useful over a wide wavelength range. This non-toxic material is near-Lambertian in character and easily applied by spray to any substrate. Spray coating allows for faster prototyping and ensures that the final design is not limited by the application process. Labsphere is equipped with an in-house coating facility and is also able to perform on-site coating for very large or complex custom projects.

Spectraflect is applied by spraying the coating onto a specially prepared surface that generally consists of degreasing followed by sandblasting to roughen the surface. Spectraflect coating can be applied to virtually any substrate and is an ideal reflectance coating for items such as optical components, integrating spheres, lamp housings and spectral diffuser panels. Because it is water soluble, Spectraflect should be cleaned with an air power sprayer. It can easily be recoated to counteract wear and tear.

Spectraflect is a specially formulated barium sulfate coating which produces a nearly perfect diffuse reflectance surface. Spectraflect is generally used as a reflectance coating in the UV-VIS-NIR region and is useful over the wavelength range from 350 to 2400 nm. The reflectance of Spectraflect, as with all reflectance coatings, is dependent on the thickness of the coating. At thicknesses above 0.5 mm (0.020 inches), the coating is opaque with reflectance of >96% over the wavelength range from 400 to 1000 nm. Spectraflect is thermally stable to approximately 100°C.

Labsphere has tested Spectraflect for laser damage threshold using a Q-switched YAG laser at 532 nm and determined the damage threshold to be 1.7 J/cm2.

Performance