Andover Corporation社について
Andover Corporationは、米国／ニューハンプシャー州（東海岸）に本社を構え、各種フィルター（バンドパスフィルター、赤外線フィルター、熱制御フォルター等）を製造しています。
Standard Edge Filters
Long Wave Pass
特徴
- 低コスト
| Thickness | 4.0mm maximum |
|---|---|
| Size Tolerance | +0.0mm/-0.5mm |
| 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°C to +200°C |
| Cut-on Slope | 6% maximum (11% for 300nm filter) |
| Cut-on Tolerance | ±10nm from 400nm-1100nm |
| ±5nm from 300nm – 375nm | |
| Mechanical | Unmounted |
| Transmission | – |
| Long Wave Pass | 85% average from the 50% cut-on point to 2000nm |
| Rejection | – |
| Long Wave Pass | 99% or greater from 0.9 x the 50% point to the UV |
| Effective index of refraction (n*) | 1.7 (approximately) |
Short Wave Pass
特徴
- 低コスト
| Thickness | 4.0mm maximum |
|---|---|
| Size Tolerance | +0.0mm/-0.5mm |
| 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°C to +200°C |
| Cut-on Slope | 6% maximum (11% for 300nm filter) |
| Cut-on Tolerance | ±10nm from 400nm-1100nm |
| ±5nm from 300nm – 375nm | |
| Mechanical | Unmounted |
| Transmission | – |
| Short Wave Pass | 400-450nm: 85% avererage from the 50% cut-on point to 0.75 x the 50% cut-off point |
| 500-1000nm:85% avererage from the 50% cut-on point to 0.75 x the 50% cut-off point | |
| Note: with the exception of the 400nm filter, all SWP filters will drop off in transmission at wavelengths under 400nm.) | |
| 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) |