Aluminum is the most commonly used filter material. It
has good mechanical properties and provides a wide bandpass while also excluding visible
light. Its bandpass characteristics are often modified by the addition of carbon or
titanium.
Tin and indium are used to
provide bandpasses at the longer wavelengths. However, tin and indium have relatively
short shelf lives, and require proper storage.
Boron and carbon are used
to provide a bandpass in the shorter wavelengths, but they do not provide much visible
light rejection.
Polyimide has a bandpass similar to carbon but offers
greater mechanical strength. It is used for very large filters and those used to support
pressure differentials.
Although most metal foils are free of any pinholes, some submicron foils may develop
microscopic "windows" which appear to be pinholes when strongly backlit. These
"virtual holes" are relatively transparent low-grade oxide, whose transmission
is principally in the red. They tend to occur at only a few discrete points in the foil.
If your research requires it, Luxel can "plug" these pinholes when necessary.
General transmittance performance are given for the 13
standard materials. For more detailed performance curves on individual materials,
click the material of interest.
Check out our Modeled Transmission vs Wavelength (Å) and Photon Energy (eV) plots for
standard, semi-custom, and specialty custom filter materials.
Standard Filter Order Form
Note: Certain filter material types are simply too fragile to exist
without support provided by using 70 line-per-inch
electroformed nickel mesh.
Contact us for details.
Select Filter MaterialSelect Standard Thickness Select Frame Style
Mesh Support Desired
Meshless Preferred
Quantity
Require Date
Other
Filter
Requirements
Have an
engineer contact me for specific questions.
LUXEL CORPORATION
