Optical Filters

 

Sets of longpass absorption filters

We offer four sets of technical grade longpass absorption filters covering the UV to NIR spectral range. These filters transmit more than 80% of the light at 0^o AOI and have no AR coating. These sets enable tailoring the passband to a specific machine vision application. Unlike interference filters, these filters enable large FOV, and are used to enhance contrast when the blue-shift effect is a problem. The filters can be supplied as round windows with a 12.5mm or 25mm diameter, or as 50mmX50mm square windows. There are four types of sets:
UV – 9 longpass filters 2mm thick: 220,240,260,280,300,320,340,360,380 nm.
LVR – 10 longpass filters 2mm thick: 400,420,450,470,490,510,535,550,565,580 nm
TVR – 9 longpass filters 2mm thick: 600,610,630,640,650,670,685,700,720 nm
NIR – 5 longpass filters 3mm thick: 760,780,800,830,850 nm

 

UV Cut-on Absorption filter set CSTM P/N   Description FS-UV-CO-12.5D-G   12.5mm Dia. X 2mm Thick – 9 longpass filters covering the 200-400nm spectral range a FS-UV-CO-25D-G   25mm Dia. X 2mm Thick  – 9 longpass filters covering the 200-400nm spectral range a FS-UV-CO-50S-G   50mm X 50mm X 2mm Thick – 9 longpass filters covering the 200-400nm spectral range a

Low Visible range Cut-on Absorption filter set CSTM P/N   Description FS-LVR-CO-12.5D-G   12.5mm Dia. X 2mm Thick -10 longpass filters covering the 400-580nm spectral range a FS-LVR-CO-25D-G   25mm Dia. X 2mm Thick  – 10 longpass filters covering the 400-580nm spectral range a FS-LVR-CO-50S-G   50mm X 50mm X 2mm Thick -10 longpass filters covering the 400-580nm spectral range a

 

Near IR range Cut-on Absorption filter set CSTM P/N   Description FS-NIR-CO-12.5D-G   12.5mm Dia. X 3mm Thick – 5 longpass filters covering the 760-950nm spectral range a FS-NIR-CO-25D-G   25mm Dia. X 3mm Thick  – 5 longpass filters covering the  760-950nm spectral range a FS-NIR-CO-50S-G   50mm X 50mm X 3mm Thick – 5 longpass filters covering the  760-950nm spectral range a