Knight Optical (UK) Ltd Datasheets for Optical Filters

Filters are used to attenuate light across a certain portion of the spectrum.
Optical Filters: Learn more

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Product Name Notes
1.1 OD Absorptive Glass ND Filter 27.2mmdia x 2mmthk -- FNP2799
Glass Neutral Density filters attenuate light by absorption just like the gelatine neutral density filters. Glass ND Filters are more robust and tend to have more uniform absorption characteristics. They...
0.03 OD Metallic ND Filter UV Grade 25mmdia x 2mmthk -- FNU00325
0.03 OD Metallic ND Filter UV Grade 50x50x2mmthk -- FNU00350
0.1 OD Metallic ND Filter UV Grade 25mmdia x 2mmthk -- FNU0125
0.1 OD Metallic ND Filter UV Grade 50x50x2mmthk -- FNU0150
0.2 OD Metallic ND Filter UV Grade 25mmdia x 2mmthk -- FNU0225
0.2 OD Metallic ND Filter UV Grade 50x50x2mmthk -- FNU0250
0.3 OD Metallic ND Filter UV Grade 12.5mmdia x 2mmthk -- FNU0313
0.3 OD Metallic ND Filter UV Grade 25mmdia x 2mmthk -- FNU0325
0.3 OD Metallic ND Filter UV Grade 50x50x2mmthk -- FNU0350
0.4 OD Metallic ND Filter UV Grade 25mmdia x 2mmthk -- FNU0425
0.4 OD Metallic ND Filter UV Grade 50x50x2mmthk -- FNU0450
0.5 OD Metallic ND Filter UV Grade 12.5mmdia x 2mmthk -- FNU0513
0.5 OD Metallic ND Filter UV Grade 25mmdia x 2mmthk -- FNU0525
0.5 OD Metallic ND Filter UV Grade 50x50x2mmthk -- FNU0550
0.6 OD Metallic ND Filter UV Grade 25mmdia x 2mmthk -- FNU0625
0.6 OD Metallic ND Filter UV Grade 50x50x2mmthk -- FNU0650
0.7 OD Metallic ND Filter UV Grade 25mmdia x 2mmthk -- FNU0725
0.7 OD Metallic ND Filter UV Grade 50x50x2mmthk -- FNU0750
0.8 OD Metallic ND Filter UV Grade 25mmdia x 2mmthk -- FNU0825
0.8 OD Metallic ND Filter UV Grade 50x50x2mmthk -- FNU0850
1 OD Metallic ND Filter UV Grade 25mmdia x 2mmthk -- FNU1025
1 OD Metallic ND Filter UV Grade 50x50x2mmthk -- FNU1050
1.5 OD Metallic ND Filter UV Grade 25mmdia x 2mmthk -- FNU1525
1.5 OD Metallic ND Filter UV Grade 50x50x2mmthk -- FNU1550
2 OD Metallic ND Filter UV Grade 25mmdia x 2mmthk -- FNU2025
2 OD Metallic ND Filter UV Grade 50x50x2mmthk -- FNU2050
3 OD Metallic ND Filter UV Grade 25mmdia x 2mmthk -- FNU3025
3 OD Metallic ND Filter UV Grade 50x50x2mmthk -- FNU3050
Metallic Neutral Density filters comprise a thin metallic layer on a borosilicate glass or UV grade fused silica polished window. Metallic ND filters attenuate the light by reflection and thus...
2 OD Gelatin ND Filter 50x50x0.1mmthk -- FNP2050
3 OD Gelatin ND Filter 50x50x0.1mmthk -- FNP3050
4 OD Gelatin ND Filter 50x50x0.1mmthk -- FNP4050
Neutral density filters attenuate light by a constant amount that is, to first order, independent of the wavelength. Gelatin ND filters are the cheapest but tend to have more fluctuation...

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