Chart Key identifies three transmission regions for each material:
- Below 10%: UV and IR cutoffs – reported wavelengths correspond to 10% transmission
- Below 50%: Practical UV and IR limits – reported wavelengths correspond to 50% transmission
- Above 50%: Useful range – transmission above the UV limit and below the IR limit
Note: Chart not to scale. Wavelengths in UV-VIS (nm) and IR (microns)
Click or tap to enlarge.
© 2018 Sealed Optics
Transmission is a fundamental optical characteristic of materials. The amount of light transmitted at a given wavelength is unique for a given material. This transmission response to wavelength is a prime consideration when identifying the best material to serve as a window for an application (e.g. pressure sight-glass, vacuum viewport, vessel window).
The chart below compares the transmission of common optical materials. The transmission for each material is represented by a stacked histogram (all values based on a 2mm optical path).