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Longpass Filters

figure Longpass Filters

Longpass filters are commonly used to isolate regions of a broad spectrum. The role of this type of filter is to transmit energy over a specified band at wavelengths longer than the cut-on wavelength, and to block the transmittance of energy at wavelengths shorter than the cut-on wavelength. In addition, longpass filters are useful for custom bandpass filtering by using with shortpass filters. Asahi Spectra offers a wide variety of longpass filters in the broad wavelength range: ultraviolet, visible, or infrared wavelengths.

Description Cut-on (nm) Thickness (mm) Item#
25mm dia. 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 XVL0530 ZVL0530
Longpass Filter / VIS 550nm 550 1 XVL0550 ZVL0550
Longpass Filter / VIS 570nm 570 1 XVL0570 ZVL0570
Longpass Filter / VIS 590nm 590 1 XVL0590 ZVL0590
Longpass Filter / VIS 610nm 610 1 XVL0610 ZVL0610
Longpass Filter / VIS 630nm 630 1 XVL0630 ZVL0630
Longpass Filter / VIS 650nm 650 1 XVL0650 ZVL0650
Longpass Filter / VIS 670nm 670 1 XVL0670 ZVL0670
Longpass Filter / VIS 690nm 690 1 XVL0690 ZVL0690
Longpass Filter / VIS 710nm 710 1 XVL0710 ZVL0710
Longpass Filter / VIS 730nm 730 1 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 XIL0840 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