這些尖銳邊緣濾波器通常被稱為長波通（LWP）和短波通（SWP）濾光片，其特征在于它們在反射和透射區域之間的高轉換率。如此高的轉換率使其成為熒光應用中的發射濾光片以及光度法中的排序濾光片的xxx選擇。它們還可以用作雜散光或微調濾光片，以消除任何不需要的近帶輻射。所有Andover LWP / SWP濾光片均由堅硬，耐用的D一表面介電涂層構成，可承受與任何高質量光學組件相關的常規清潔和處理。它們的膜結構本質上是經過修改的四分之一波長疊堆，利用干涉效應而不是吸收來隔離其光譜帶。與濾鏡不同 由于對波長隨角度的變化不敏感，這些濾光器的波長隨入射角的增加而變短。此功能在可能需要微調50％截止波長或截止波長的應用中很有用。所有標準邊緣濾光片都可以從400nm到1000nm以50nm的增量遞增。
? Low-cost
? Wide slection of wavelengths
? Provide steeper transistion than color glass filters
General Specifications
| 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 |
| 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
| Long Wave Pass: | 99% or greater from 0.9 x the 50% point to the UV |
| 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) |
| DESCRIPTION | PART NO. |
| 300.0nm Cut-on, 12.5 mm dia., unmounted, Long Wave Pass Edge Filter | 300FH90-12.5 |
| 300.0nm Cut-on, 25.0 mm dia., unmounted, Long Wave Pass Edge Filter | 300FH90-25 |
| 300.0nm Cut-on, 50.0 mm dia., unmounted, Long Wave Pass Edge Filter | 300FH90-50 |
| 300.0nm Cut-on, 50.0 x 50.0 mm sq., unmounted, Long Wave Pass Edge Filter | 300FH90-50S |
| 325.0nm Cut-on, 12.5 mm dia., unmounted, Long Wave Pass Edge Filter | 325FH90-12.5 |
| 325.0nm Cut-on, 25.0 mm dia., unmounted, Long Wave Pass Edge Filter | 325FH90-25 |
| 325.0nm Cut-on, 50.0 mm dia., unmounted, Long Wave Pass Edge Filter | 325FH90-50 |
| 325.0nm Cut-on, 50.0 x 50.0 mm sq., unmounted, Long Wave Pass Edge Filter | 325FH90-50S |
| 350.0nm Cut-on, 12.5 mm dia., unmounted, Long Wave Pass Edge Filter | 350FH90-12.5 |
| 350.0nm Cut-on, 25.0 mm dia., unmounted, Long Wave Pass Edge Filter | 350FH90-25 |
| 350.0nm Cut-on, 50.0 mm dia., unmounted, Long Wave Pass Edge Filter | 350FH90-50 |
| 350.0nm Cut-on, 50.0 x 50.0 mm sq., unmounted, Long Wave Pass Edge Filter | 350FH90-50S |
| 375.0nm Cut-on, 12.5 mm dia., unmounted, Long Wave Pass Edge Filter | 375FH90-12.5 |
| 375.0nm Cut-on, 25.0 mm dia., unmounted, Long Wave Pass Edge Filter | 375FH90-25 |
| 375.0nm Cut-on, 50.0 mm dia., unmounted, Long Wave Pass Edge Filter | 375FH90-50 |
| 375.0nm Cut-on, 50.0 x 50.0 mm sq., unmounted, Long Wave Pass Edge Filter | 375FH90-50S |
| 400.0nm Cut-on, 12.5 mm dia., unmounted, Long Wave Pass Edge Filter | 400FH90-12.5 |
| 400.0nm Cut-on, 25.0 mm dia., unmounted, Long Wave Pass Edge Filter | 400FH90-25 |
| 400.0nm Cut-on, 50.0 mm dia., unmounted, Long Wave Pass Edge Filter | 400FH90-50 |
| 400.0nm Cut-on, 50.0 x 50.0 mm sq., unmounted, Long Wave Pass Edge Filter | 400FH90-50S |
| 450.0nm Cut-on, 12.5 mm dia., unmounted, Long Wave Pass Edge Filter | 450FH90-12.5 |
| 450.0nm Cut-on, 25.0 mm dia., unmounted, Long Wave Pass Edge Filter | 450FH90-25 |
| 450.0nm Cut-on, 50.0 mm dia., unmounted, Long Wave Pass Edge Filter | 450FH90-50 |
| 450.0nm Cut-on, 50.0 x 50.0 mm sq., unmounted, Long Wave Pass Edge Filter | 450FH90-50S |
| 500.0nm Cut-on, 12.5 mm dia., unmounted, Long Wave Pass Edge Filter | 500FH90-12.5 |
| 500.0nm Cut-on, 25.0 mm dia., unmounted, Long Wave Pass Edge Filter | 500FH90-25 |
| 500.0nm Cut-on, 50.0 mm dia., unmounted, Long Wave Pass Edge Filter | 500FH90-50 |
| 500.0nm Cut-on, 50.0 x 50.0 mm sq., unmounted, Long Wave Pass Edge Filter | 500FH90-50S |
| 550.0nm Cut-on, 12.5 mm dia., unmounted, Long Wave Pass Edge Filter | 550FH90-12.5 |
| 550.0nm Cut-on, 25.0 mm dia., unmounted, Long Wave Pass Edge Filter | 550FH90-25 |
| 550.0nm Cut-on, 50.0 mm dia., unmounted, Long Wave Pass Edge Filter | 550FH90-50 |
| 550.0nm Cut-on, 50.0 x 50.0 mm sq., unmounted, Long Wave Pass Edge Filter | 550FH90-50S |
| 600.0nm Cut-on, 12.5 mm dia., unmounted, Long Wave Pass Edge Filter | 600FH90-12.5 |
| 600.0nm Cut-on, 25.0 mm dia., unmounted, Long Wave Pass Edge Filter | 600FH90-25 |
| 600.0nm Cut-on, 50.0 mm dia., unmounted, Long Wave Pass Edge Filter | 600FH90-50 |
| 600.0nm Cut-on, 50.0 x 50.0 mm sq., unmounted, Long Wave Pass Edge Filter | 600FH90-50S |
| 650.0nm Cut-on, 12.5 mm dia., unmounted, Long Wave Pass Edge Filter | 650FH90-12.5 |
| 650.0nm Cut-on, 25.0 mm dia., unmounted, Long Wave Pass Edge Filter | 650FH90-25 |
| 650.0nm Cut-on, 50.0 mm dia., unmounted, Long Wave Pass Edge Filter | 650FH90-50 |
| 650.0nm Cut-on, 50.0 x 50.0 mm sq., unmounted, Long Wave Pass Edge Filter | 650FH90-50S |
| 700.0nm Cut-on, 12.5 mm dia., unmounted, Long Wave Pass Edge Filter | 700FH90-12.5 |
| 700.0nm Cut-on, 25.0 mm dia., unmounted, Long Wave Pass Edge Filter | 700FH90-25 |
| 700.0nm Cut-on, 50.0 mm dia., unmounted, Long Wave Pass Edge Filter | 700FH90-50 |
| 700.0nm Cut-on, 50.0 x 50.0 mm sq., unmounted, Long Wave Pass Edge Filter | 700FH90-50S |
| 750.0nm Cut-on, 12.5 mm dia., unmounted, Long Wave Pass Edge Filter | 750FH90-12.5 |
| 750.0nm Cut-on, 25.0 mm dia., unmounted, Long Wave Pass Edge Filter | 750FH90-25 |
| 750.0nm Cut-on, 50.0 mm dia., unmounted, Long Wave Pass Edge Filter | 750FH90-50 |
| 750.0nm Cut-on, 50.0 x 50.0 mm sq., unmounted, Long Wave Pass Edge Filter | 750FH90-50S |
| 800.0nm Cut-on, 12.5 mm dia., unmounted, Long Wave Pass Edge Filter | 800FH90-12.5 |
| 800.0nm Cut-on, 25.0 mm dia., unmounted, Long Wave Pass Edge Filter | 800FH90-25 |
| 800.0nm Cut-on, 50.0 mm dia., unmounted, Long Wave Pass Edge Filter | 800FH90-50 |
| 800.0nm Cut-on, 50.0 x 50.0 mm sq., unmounted, Long Wave Pass Edge Filter | 800FH90-50S |
| 850.0nm Cut-on, 12.5 mm dia., unmounted, Long Wave Pass Edge Filter | 850FH90-12.5 |
| 850.0nm Cut-on, 25.0 mm dia., unmounted, Long Wave Pass Edge Filter | 850FH90-25 |
| 850.0nm Cut-on, 50.0 mm dia., unmounted, Long Wave Pass Edge Filter | 850FH90-50 |
| 850.0nm Cut-on, 50.0 x 50.0 mm sq., unmounted, Long Wave Pass Edge Filter | 850FH90-50S |
| 900.0nm Cut-on, 12.5 mm dia., unmounted, Long Wave Pass Edge Filter | 900FH90-12.5 |
| 900.0nm Cut-on, 25.0 mm dia., unmounted, Long Wave Pass Edge Filter | 900FH90-25 |
| 900.0nm Cut-on, 50.0 mm dia., unmounted, Long Wave Pass Edge Filter | 900FH90-50 |
| 900.0nm Cut-on, 50.0 x 50.0 mm sq., unmounted, Long Wave Pass Edge Filter | 900FH90-50S |
| 950.0nm Cut-on, 12.5 mm dia., unmounted, Long Wave Pass Edge Filter | 950FH90-12.5 |
| 950.0nm Cut-on, 25.0 mm dia., unmounted, Long Wave Pass Edge Filter | 950FH90-25 |
| 950.0nm Cut-on, 50.0 mm dia., unmounted, Long Wave Pass Edge Filter | 950FH90-50 |
| 950.0nm Cut-on, 50.0 x 50.0 mm sq., unmounted, Long Wave Pass Edge Filter | 950FH90-50S |
| 1000.0nm Cut-on, 12.5 mm dia., unmounted, Long Wave Pass Edge Filter | 100FH90-12.5 |
| 1000.0nm Cut-on, 25.0 mm dia., unmounted, Long Wave Pass Edge Filter | 100FH90-25 |
| 1000.0nm Cut-on, 50.0 mm dia., unmounted, Long Wave Pass Edge Filter | 100FH90-50 |
| 1000.0nm Cut-on, 50.0 x 50.0 mm sq., unmounted, Long Wave Pass Edge Filter | 100FH90-50S |
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