Short Wave Pass
Overview
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 2 microns. 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).
Typical Characteristics
| Available wavelength range (edge position) | ~1.5 to 20 µm |
| 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% up to 1.5 x 5% cut off or greater |
Typical Performance
