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Technical Information

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Spectralon reflectance material is a perfectly diffuse reflecting material that is ideal for applications ranging from the UV-VIS to the NIR-MIR wavelength region. Spectralon is a highly lambertian, thermoplastic material that can be machined into a wide variety of shapes to suit any reflectance component requirement. Typical applications include back-light illuminators, lamp housings, integrating spheres, laser cavities and calibration targets. Three grades of Spectralon reflectance material are available for component fabrication. These include optical-grade, space-grade and laser-grade Spectralon.

OEM and Custom Component Fabrication

We welcome inquiries for the development of custom or OEM Spectralon fabricated components. With our dedicated Spectralon development laboratory and a fully equipped Spectralon machining facility we can rapidly handle orders ranging from 1 to 100,000 pieces.

Please contact our Technical Sales Department to discuss your specific requirements.

Ordering Information

To receive an immediate quotation, forward a sample or print of the component to our Technical Sales Department. Please indicate the quantity desired and any special handling requirements.

Physical Properties

  • Density: 1.25 - 1.5 g/cm3
  • Water Permeability: <0.001% (Hydrophobic)
  • Hardness: 20 - 20 Shore D
  • Coefficient of Linear Expansion: 5.5 - 6.5 x 10(-5) in/in-F°, 10(-40)C(-1)
  • Thermal Stability: to 350°C
  • Vacuum Stability: No outgassing except for entrained air
  • Flammability: Nonflammable (UL rating V-O)

SRM-99O Optical-Grade Spectralon® Material

Optical-grade Spectralon reflectance material is characterized by a high reflectance and lambertian behavior over the UV-VIS-NIR wavelength region. The reflectance of Spectralon is >99% over the wavelength range from 400 to 1500 nm, and >95% over the wavelength range from 250 to 2500 nm. This wide range of high reflectance allows for the material to be used from the UV into the NIR region of the spectrum. The material is ideal for fabrication of components such as integrating spheres, lamp housings, backlight panels, line illuminators and panel reflectors.

Optical-grade Spectralon is hydrophobic and thermally stable to 350°C. It is chemically inert to all but the most powerful bases such as sodium amide and organo-sodium of lithium compounds. The material is durable and maintains consistent reflectance even under harsh laboratory or field conditions. The use of optical-grade Spectralon assures the user of highly accurate, reproducible spectral data when used in the construction of optical components.


  • Calibration targets
  • Densitometer standards
  • Fluorescent screens
  • Illuminators
  • Integrating Spheres
  • Lamp housings
  • Laser cavities
  • Laser targets
  • Line scanners
  • Panel reflectors
  • Reflectance standards
  • Remote sensing targets
  • Spectral diffuser panels
  • Underwater lamp diffusers

View Optical-Grade Spectralon Spectral Distribution Curve


SRM-99L Laser-Grade Spectralon Material 

Laser-grade Spectralon, which combines extremely high reflectance with nearly perfect diffuse scattering is the ideal material for fabricating laser cavities. Laser-grade Spectralon offers the same physical properties as optical-grade with a different formulation of resin that gives enhanced performance when used in laser pump cavities. The material is slightly lower in reflectance than optical-grade Spectralon; however, it is much more suitable to prolonged exposure to high intensity arc lamp radiation. Lambertian properties are unaffected by change in the materials resin formulation.

Development of:

  • Laser Range Finder Systems
  • Laser Delivery Systems
  • Dental Laser Systems
  • Surgical Laser Systems

View Laser-Grade Spectralon Spectral Distribution Curve

SRM-99S Space-Grade Spectralon Material

Space-grade Spectralon reflectance material has gained wide acceptance as a reflecting diffuser material for terrestrial remote sensing applications for both field and laboratory applications. Space-grade Spectralon combines high reflectance with an extremely lambertian reflectance profile, exhibiting reflectance values of >99% reflectance over the wavelength range from 400 to 1500 nm and >95% reflectance from 250 to 2500 nm.

The material is processed in a clean-room environment and packaged to protect against molecular and particulate contamination. Each step in the manufacturing and handling process ensures that the material is of the highest purity and cleanliness, essential for space applications. Lambertian properties are unaffected by the reformulation and manufacturing process.


  • Calibration Panels for Remote Sensing Applications
  • Spectral Diffuser Panels

View Space-Grade Spectralon Spectral Distribution Curve

Spectralon UV-VIS-NIR Diffusion Material 

Spectralon diffusion material consists of thin sections, generally between 0.1 and 1.0 mm, of specially formulated Spectralon designed to transmit and efficiently scatter incident light. Diffusers fabricated from Spectralon are particularly useful for broad-band diffusion of optical radiation, from the UV spectral region to the NIR spectral region. Spectralon diffusion material is invaluable in reducing the sensitivity of detectors to beam alignment and improving the uniformity of light sources.

These diffusers have a useful range of 200-2500 nm, and are significantly more diffuse than double-ground quartz. 


  • Fluorescence Chambers
  • Improvement of Light Source Uniformity
  • Improvement of Detector Performance
  • Photomicroscopy
  • Transillumination
  • UV-VIS-NIR Diffusion

View Spectralon UV-VIS-NIR Diffusion Spectral Distribution Curve

Specifications and Ordering Information

Part Number
Overall Dimension (inches)
Disc, unmounted
Disc, mounted
Disc, unmounted
0. 007
Disc, mounted
Disc, unmounted
0. 007
Disc, mounted
Sheet, unmounted
2.0 x 2.0
0. 007
Sheet, mounted
2.25 x 2.25
Sheet, unmounted
5.0 x 5.0
0. 007
Sheet, mounted
5.25 x 5.25



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