| Thickness |
4.0 mm maximum |
| Size Tolerance |
+0.0 mm/-0.5 mm |
| Min. Clear Aperture |
85% of outside dimension |
| Substrate Material |
Glass (Note: BK-7 or Borofloat available as an option for higher Tx.) |
| Flatness |
3-5 waves per 25 TWF |
| Surface Quality |
80-50 per MIL-C-48497A |
| Humidity and Abrasion |
Per MIL-C-675A |
| Operating Temperature |
-50℃ to +200℃ |
| Cut-on Slope |
6% maximum (11% for 300 nm filter) |
| Cut-on Tolerance |
±10 nm from 400nm-1100 nm |
| ±5 nm from 300 nm – 375 nm |
| Mechanical |
Unmounted |
| Transmission |
– |
| Short Wave Pass |
400-450 nm: 85% avererage from the 50% cut-on point to 0.75 x the 50% cut-off point |
| 500-1000 nm:85% avererage from the 50% cut-on point to 0.75 x the 50% cut-off point |
| Note: with the exception of the 400 nm filter, all SWP filters will drop off in transmission at wavelengths under 400 nm.) |
| Rejection |
– |
| Short Wave Pass |
99% or greater from 1.07 x the 50% point to 1.25 x the 50% point |
| Effective index of refraction (n*) |
1.7 (approximately) |
