Longpass filter
Nearly 50 years of experience in coating processes and the new Magnetron Sputtering Technology combined with Japanese discipline, enables such outstanding specifications in all types of filters.
Product features:
These long pass filters with their steep edges, safe blocking of unwanted wavelengths and high transmission values in the passband are offered up to a cut-on at 990nm. The blocking range typically starts at 350nm. The passband is often guaranteed up to 1400nm.
UV long pass filter:
The ASAHI Spectra UV long pass filters have very steep flanks between the reflection and passband ranges,
while maintaining a very high permeability in the UV transmission range. The spectral transmission properties are constant over the entire passband of the filters.
Overview of the standard products of the long pass filters
| Description | Cut-on (nm) | Thickness (mm) | Item# 25mm dia. | Item# 50x50mm |
|---|---|---|---|---|
| Longpass Filter / UV 250nm | 250 | 1 | XUL0250 | ZUL0250 |
| Longpass Filter / UV 275nm | 275 | 1 | XUL0275 | ZUL0275 |
| Longpass Filter / UV 300nm | 300 | 1 | XUL0300 | ZUL0300 |
| Longpass Filter / UV 325nm | 325 | 1 | XUL0325 | ZUL0325 |
| Longpass Filter / UV 350nm | 350 | 1 | XUL0350 | ZUL0350 |
| Longpass Filter / UV 385nm | 385 | 1 | XUL0385 | ZUL0385 |
| Longpass Filter / UV 400nm | 400 | 1 | XUL0400 | ZUL0400 |
| Longpass Filter / UV 422nm | 422 | 1 | XUL0422 | ZUL0422 |
| Longpass Filter / VIS 430nm | 430 | 1 | XVL0430 | ZVL0430 |
| Longpass Filter / VIS 450nm | 450 | 1 | XVL0450 | ZVL0450 |
| Longpass Filter / VIS 470nm | 470 | 1 | XVL0470 | ZVL0470 |
| Longpass Filter / VIS 490nm | 490 | 1 | XVL0490 | ZVL0490 |
| Longpass Filter / VIS 510nm | 510 | 1 | XVL0510 | ZVL0510 |
| Longpass Filter / VIS 530nm | 530 | 1.5 | XVL0530 | ZVL0530 |
| Longpass Filter / VIS 550nm | 550 | 1.5 | XVL0550 | ZVL0550 |
| Longpass Filter / VIS 570nm | 570 | 1.5 | XVL0570 | ZVL0570 |
| Longpass Filter / VIS 590nm | 590 | 1.5 | XVL0590 | ZVL0590 |
| Longpass Filter / VIS 610nm | 610 | 1.5 | XVL0610 | ZVL0610 |
| Longpass Filter / VIS 630nm | 630 | 1.5 | XVL0630 | ZVL0630 |
| Longpass Filter / VIS 650nm | 650 | 2 | XVL0650 | ZVL0650 |
| Longpass Filter / VIS 670nm | 670 | 2 | XVL0670 | ZVL0670 |
| Longpass Filter / VIS 690nm | 690 | 2 | XVL0690 | ZVL0690 |
| Longpass Filter / VIS 710nm | 710 | 2 | XVL0710 | ZVL0710 |
| Longpass Filter / VIS 730nm | 730 | 2 | XVL0730 | ZVL0730 |
| Longpass Filter / IR 750nm | 750 | 2 | XIL0750 | ZIL0750 |
| Longpass Filter / IR 780nm | 780 | 2 | XIL0780 | ZIL0780 |
| Longpass Filter / IR 810nm | 810 | 2 | XIL0810 | ZIL0810 |
| Longpass Filter / IR 840nm | 840 | 2 | ZIL0840 | |
| Longpass Filter / IR 870nm | 870 | 2 | XIL0870 | ZIL0870 |
| Longpass Filter / IR 900nm | 900 | 2 | XIL0900 | ZIL0900 |
| Longpass Filter / IR 930nm | 930 | 2 | XIL0930 | ZIL0930 |
| Longpass Filter / IR 960nm | 960 | 2 | XIL0960 | ZIL0960 |
| Longpass Filter / IR 990nm | 990 | 2 | XIL0990 | ZIL0990 |
The long pass filters are available in two standard sizes:
- Round with 25mm diameter or
- Square 50x50mm
Special cuts or customized filters with other pass-through or blocking ranges can be made. Please contact your technical advisor for more information.