Short wave pass filters are distinguished by a sharp transition from a zone of transmission to a zone of rejection. The rejection region typically extends to the far infrared but can be limited for filters with edge positions below 2um. When ordering it is necessary to specify the 5% or 50% cut off edge position (the 5% point is measured as an absolute value but the 50% point is measured as 50% of peak transmittance).
Available wavelength range (edge position) | ~1.8 to 20 um |
Edge tolerance | To customers requirements, from +/-1% but standard tolerance +/-4% |
Average transmittance | Typically >75% (depending on wavelength) |
Cut on slope | Typically < 5% |
Blocking (attenuation) | Typically <0.1% to 0.3 micron. |
We have a wide range of filters available for purchase through our online catalogue. If you can’t find the product you need, please click here to contact us and discuss bespoke orders.
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