Spectralon® Optical-Grade Reflectance Material
FEATURES:
- >99% Diffuse Reflectance
- Extremely Lambertian
- Chemically Inert
- Thermally Stable
- Environmentally Stable
- NIST Traceable Calibration
APPLICATIONS:
- Optical Components
- Densitometer Standards
- Remote Sensing Targets
Labsphere's Spectralon® Reflectance Material can be machined into a wide variety of shapes for the construction of optical components. The material has hardness roughly equal to that of high-density polyethylene and is thermally stable to >400°C.
Spectralon® Reflectance Material gives the highest diffuse reflectance of any known material or coating over the UV-VIS-NIR region of the spectrum.
In-house machining allows samples to be created quickly and easily, and modified throughout the design, prototyping and testing process. This manufacturing flexibility means low or high volume quantities can be ordered. Labsphere's engineering staff has an established industry-wide reputation for its knowledge and experience in laser pump chamber design and often collaborates with customers to develop custom Spectralon® designs.
 The surface and immediate subsurface of Labsphere's Spectralon® exhibits highly Lambertian behavior. The porous network produces multiple reflections in the first few tenths of a millimeter of Spectralon®.
The use of Labsphere's Spectralon® should be limited to the UV-VIS-NIR. Spectralon® exhibits absorbencies at 2800 nm, then absorbs strongly (>20% reflectance) from 5.4 to 8 μm.
Spectralon® exhibits relatively flat spectral distribution over most of the UV-VIS-NIR from 250 to 2000 nm. These spectral properties exceed those of most paints, which show strong absorbencies in the UV due to absorbencies by TiO2 or similar pigments. The hydrophobic nature of Spectralon® also leads to exclusion of water overtone bands in the NIR, which may occur in barium-sulfate-based materials. The open structure of Spectralon® causes both reflectance and transmittance, but not absorbance of light.
Specifications:
| Thermal Stability: |
Decomposes at > 400OC |
| Laser Damage Threshold: |
4 Joule/cm2 |
Physical, Thermo-Optical and Electronic Properties of Spectralon
| Value |
Test Method |
|
| Substance: |
n/a |
Polytetrafluoroethylene |
| Vacuum Compatibility: |
n/a |
to 10-6 Torr |
| Flammability: |
n/a |
Non flammable (UL rating V-O) |
| Water Permeability: |
ASTM D-570 |
<0.001% Hydrophobic |
| Volume Resistivity: |
IEC 60093 |
>1018 ohm/cm |
| Dielectric Strength: |
ASTM D-149 |
18 V/μm
|
| Yield Stress: |
ASTM D638 |
208 psi
|
| Ultimate Stress: |
ASTM D638 |
891 psi
|
| Absorbance: (as) |
n/a |
0.07 |
| Emittance: (e) |
n/a |
0.88
|
Products
Download A Datasheet for Optical-Grade Spectralon
Download Spectralon Design Guidelines
Technical Library
Download A Guide To Reflectance Materials and Coatings
|