SCHOTT NG Gray Glass Neutral Density (ND) Filters
• Tightly Controlled Thickness Specifications
• Standard Thicknesses of 1, 2, and 3 mm
• Even Light Attenuation in the Visible Spectrum
SCHOTT NG Gray Glass Neutral Density (ND) Filters feature nearly constant transmittance in the visible spectrum,
attenuating light through absorption. The filters are available in 6 materials, each with a thickness of 1, 2,
or 3 mm. Filters can be stacked to achieve custom optical densities. SCHOTT NG Absorptive Neutral Density
Filters are used in a variety of machine vision, factory automation, and analytical instrumentation applications.
Custom sizes from 5 to 160 mm are available upon request; for more information, visit our Colored Glass Filter
Manufacturing capabilities webpage. SCHOTT NG Absorptive Neutral Density (ND) Filters with precision optical
density and transmission values are also available.
Dimensional Tolerance (mm): ±0,2
Thickness Tolerance (mm):
1 mm: ±0,1
2 and 3 mm: ±0,2
Parallelism (arcmin): ≤3
Surface Quality:
60-40
Specification Wavelength (nm): 550
Optical Density Tolerance: Nominal
Transmission Tolerance: Nominal
Schott NG Absorptive ND Filters
(1mm Thickness) Visible Spectrum SCHOTT NG Gray Glass Neutral Density (ND) Filters
Material Thickness
(mm)
Optical
Density
Transmission
(%)
Refractive
Index (nd)
Density
(g/cm3)
Transformation
Temperature (°C)
25 mm Diameter 50 x 50 mm
Stock No. Price Stock No. Price
NG11 1 0,14 72 1,52 2,41 481 #14-105 €32,50 #14-104 €77,50
NG11 2 0,25 56 1,52 2,41 481 #14-107 €32,50 #14-106 €77,50
NG11 3 0,35 44 1,52 2,41 481 #14-109 €32,50 #14-108 €77,50
NG5 1 0,28 53 1,50 2,43 474 #14-093 €32,50 #14-092 €77,50
NG5 2 0,51 31 1,50 2,43 474 #14-095 €32,50 #14-094 €77,50
NG5 3 0,75 18 1,50 2,43 474 #14-097 €32,50 #14-096 €77,50
NG4 1 0,55 28 1,51 2,43 483 #14-087 €32,50 #14-086 €77,50
NG4 2 1,06 8,6 1,51 2,43 483 #14-089 €32,50 #14-088 €77,50
NG4 3 1,58 2,6 1,51 2,43 483 #14-091 €32,50 #14-090 €77,50
NG3 1 0,99 10 1,51 2,44 462 #14-081 €32,50 #14-080 €77,50
NG3 2 1,95 1,1 1,51 2,44 462 #14-083 €32,50 #14-082 €77,50
NG3 3 2,91 0,12 1,51 2,44 462 #14-085 €32,50 #14-084 €77,50
NG9 1 1,42 3,8 1,51 2,45 470 #14-099 €32,50 #14-098 €77,50
NG9 2 2,8 0,15 1,51 2,45 470 #14-101 €32,50 #14-100 €77,50
NG9 3 4,18 0,007 1,51 2,45 470 #14-103 €32,50 #14-102 €77,50
NG1 1 4,84 0,001 1,52 2,47 471 #14-075 €32,50 #14-074 €77,50
NG1 2 >5 <0,001 1,52 2,47 471 #14-077 €32,50 #14-076 €77,50
NG1 3 >5 <0,001 1,52 2,47 471 #14-079 €32,50 #14-078 €77,50
SCHOTT NG Absorptive Neutral Density (ND) Filters
• Tightly Controlled Transmission Specifications
• NG4, NG9, or NG11 Glass Types
• Specified Optical Densities from 0,15 to 5,0
SCHOTT NG Absorptive Neutral Density (ND) Filters consist of NG4, NG9, or NG11 SCHOTT glass types and
provide even light attenuation through absorption in the visible spectrum. These filters are manufactured to
achieve a specified optical density, ranging from 0,15 to 5,0, to simplify integration into optical systems. SCHOTT
NG Absorptive Neutral Density (ND) Filters are available in a standard 50 x 50 mm size and multiple filters can be
stacked to achieve custom optical densities. Custom sizes from 5 to 160 mm as well as custom optical densities
or transmission values for specific wavelengths are available on request; for more information, visit our Colored
Glass Filter Manufacturing capabilities webpage. SCHOTT NG Gray Glass Filters are also available.
Each filter lot is measured and thickness is adjusted to meet the specified transmission value at 546 nm.
Each filter is then polished with a ±0,05 mm thickness tolerance to guarantee consistent performance. Variations
in filter lot performance can result in variations in nominal thickness; however, the transmission variations
between lots will be minimal.
NG9 NG1
NG11
400 450 500 550 600 650 λ (nm)
Schott NG Absorptive ND Filters
(1mm Thickness) Extended Spectrum
NG9
NG1
NG5
NG4
NG3
NG11
NG5
NG4
NG3
T (%)
90
80
70
60
50
40
30
20
10
0
T (%)
90
80
70
60
50
40
30
20
10
0
400 600 800 1000 1200 1400 1600 1800 λ (nm)
166 +44 (0) 1904 788600 | Edmund Optics® N NEW PRODUCT NEW LOW PRICE
testing & detection targets illumination cameras imaging lenses microscopy lasers optomechanics optics
Dimensional Tolerance (mm): ±0,2
Thickness Tolerance (mm): nominal
Parallelism (arcmin): ≤3
Surface Quality: 60-40
Specification Wavelength (nm): 546
SCHOTT NG Absorptive Neutral Density (ND) Filters
Optical
Thickness
Transmission
Glass/Filter
Density
(mm)
(%)
Number
12,5 mm Diameter 25 mm Diameter 50 x 50 mm
Stock No. Price Stock No. Price Stock No. Price
0,1 ± 0,006 0,60 79,4 ± 0,013 SCHOTT NG11 #16-717 €20,00 #16-718 €35,00 #16-719 €80,00
0,15 ± 0,006 1,20 70,79 ± 0,013 SCHOTT NG11 #16-645 €20,00 #16-661 €35,00 #14-042 €80,00
0,2 ± 0,006 1,40 63,1 ± 0,013 SCHOTT NG11 #16-720 €20,00 #16-721 €35,00 #16-722 €80,00
0,3 ± 0,006 2,50 50,11 ± 0,013 SCHOTT NG11 #16-646 €20,00 #16-662 €35,00 #14-044 €80,00
0,4 ± 0,03 0,70 39,8 ± 0,06 SCHOTT NG4 #16-723 €20,00 #16-724 €35,00 #16-725 €80,00
0,5 ± 0,03 0,90 31,6 ± 0,06 SCHOTT NG4 #16-726 €20,00 #16-727 €35,00 #16-728 €80,00
0,6 ± 0,03 1,20 25,11 ± 0,06 SCHOTT NG4 #16-647 €20,00 #16-663 €35,00 #14-046 €80,00
0,9 ± 0,03 1,70 12,6 ± 0,06 SCHOTT NG4 #16-729 €20,00 #16-730 €35,00 #16-731 €80,00
1,0 ± 0,03 2,00 10 ± 0,06 SCHOTT NG4 #16-648 €20,00 #16-664 €35,00 #14-048 €80,00
1,3 ± 0,03 2,50 5,01 ± 0,06 SCHOTT NG4 #16-649 €20,00 #16-665 €35,00 #14-050 €80,00
1,6 ± 0,07 1,10 2,51 ± 0,17 SCHOTT NG9 #16-650 €20,00 #16-666 €35,00 #14-052 €80,00
2,0 ± 0,07 1,40 1 ± 0,17 SCHOTT NG9 #16-651 €20,00 #16-667 €35,00 #14-054 €80,00
2,3 ± 0,07 1,60 0,5 ± 0,17 SCHOTT NG9 #16-652 €20,00 #16-668 €35,00 #14-056 €80,00
2,6 ± 0,07 1,80 0,25 ± 0,17 SCHOTT NG9 #16-653 €20,00 #16-669 €35,00 #14-058 €80,00
3,0 ± 0,07 2,10 0,1 ± 0,17 SCHOTT NG9 #16-654 €20,00 #16-670 €35,00 #14-060 €80,00
3,3 ± 0,07 2,30 0,05 ± 0,17 SCHOTT NG9 #16-655 €20,00 #16-671 €35,00 #14-062 €80,00
3,6 ± 0,07 2,50 0,025 ± 0,17 SCHOTT NG9 #16-656 €20,00 #16-672 €35,00 #14-064 €80,00
4 ± 0,07 2,80 0,01 ± 0,17 SCHOTT NG9 #16-657 €20,00 #16-673 €35,00 #14-066 €80,00
4,3 ± 0,07 3,00 0,005 ± 0,17 SCHOTT NG9 #16-658 €20,00 #16-674 €35,00 #14-068 €80,00
4,6 ± 0,07 3,20 0,0025 ± 0,17 SCHOTT NG9 #16-659 €20,00 #16-675 €35,00 #14-070 €80,00
5 ± 0,07 3,50 0,001 ± 0,17 SCHOTT NG9 #16-660 €20,00 #16-676 €35,00 #14-072 €80,00
N
N
NN
N
N N
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/