eo_logo
 
Product added to cart
All Products / Optics / SCHOTT Optical Components / SCHOTT NG Gray Glass Neutral Density (ND) Filters
See all 36 Products in Family

SCHOTT NG3, 50mm Sq., 2mm Thick, Absorptive ND Filter

See More by SCHOTT Optical Components
SCHOTT NG Gray Glass Neutral Density (ND) Filters

SCHOTT NG Gray Glass Neutral Density (ND) Filters

SCHOTT NG Gray Glass Neutral Density (ND) Filters SCHOTT NG Gray Glass Neutral Density (ND) Filters
×
Stock #14-082 In Stock
×
Quantity Selector - Use the plus and minus buttons to adjust the quantity. +
£82.45
Qty 1-10
£82.45
Qty 11+
£72.25
Volume Pricing
Request Quote
Prices shown are exclusive of VAT/local taxes
Product Downloads

Specifications

General

Type:
Neutral Density Filter

Physical & Mechanical Properties

Dimensions (mm):
50.0 x 50.0
Length (mm):
50.00
Thickness (mm):
2.00 ±0.2
Width (mm):
50.00
Parallelism (arcmin):
≤3
Dimensional Tolerance (mm):
±0.2

Optical Properties

Optical Density OD (Average):
1.95
Glass/Filter Number:
SCHOTT NG3
Coating:
Uncoated
Index of Refraction (nd):
1.51
Surface Quality:
60-40
Transmission (%):
1.1
Transmission Tolerance (%):
(nominal)
Optical Density Tolerance (%):
(nominal)

Material Properties

Transformation Temperature (°C):
462

Regulatory Compliance

RoHS:
Compliant
×
Reach 224:
Compliant
×
Certificate of Conformance:
View
×

Product Details

  • Tightly Controlled Thickness Specifications
  • Standard Thicknesses of 1, 2, and 3mm
  • Even Light Attenuation in the Visible Spectrum
  • NG1, NG3, NG4, NG5, NG9 and NG11 Glass Types Available
  • Precision SCHOTT NG Glass Filters Also Available

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 3mm. Filters can be stacked to achieve custom optical densities. SCHOTT NG Gray Glass Neutral Density (ND) Filters are used in a variety of machine vision, factory automation, and analytical instrumentation applications. Custom sizes from 5 to 160mm 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.

While SCHOTT NG Gray Glass Neutral Density (ND) Filters will provide consistent transmission values from 400 - 700nm, variations in filter lot manufacturing may lead to variations in transmission from filter to filter. Please see the table in the Technical Information tab for acceptable transmission variations for each glass type and thickness.

Filter Simulation Software

Click here to download SCHOTT’s colored glass filter calculation program which can be used to calculate the internal transmittance and external transmission of each SCHOTT glass type. The program can simulate the performance of individual filters with user specified thickness or of stacked filters with varying glass types and thicknesses.

Interactive transmission curves are also available here.

Immediate Custom Quotes Available

If you have a need for any round, square, or rectangular size of a SCHOTT NG Gray Glass Neutral Density (ND) Filter in dimensions between 5mm and 50mm, please visit our Colored Filter Glass Tool.  We’ll provide an immediate quote, and can deliver the part to your requested size in approximately 2 weeks.  A full list of standard manufacturing tolerances and restrictions are listed.  For fully customized filters to your requirements, visit our Customized Optical Filter Glass Capabilities page.

Technical Information

 
 Glass Type Thickness Min. Transmission (%) Max. Transmission (%)
NG3 1 7.4 11.1
2 0.01 2.8
3 0.01 1.9
NG4 1 24.9 31.3
2 6.1 11.6
3 0.01 5.5
NG5 1 49.8 55.4
2 27.2 32.8
3 14.3 19.9
NG9 1 1.8 5.5
2 0.01 2.0
3 0.01 1.8
NG11 1 70.1 73.8
2 54.2 57.9
3 42.2 45.9

Quote Your Size

Please enter your required specifications here:
Glass Type
  • BG - Blue, blue-green, and multiband
  • GG - Colorless to yellow, IR transmitting
  • KG - Colorless glasses, high VIS transmission and IR absorption
  • NG - Neutral density glasses with uniform attenuation in VIS
  • OG - Orange glasses, IR transmitting
  • RG - Red and black glasses, blocking VIS, IR transmitting
  • UG - Black and blue glasses, UV transmitting
  • VG - Green glasses
  • WG - Colorless glasses w/ different UV cut-offs, transmitting in VIS and IR
Filter Number
Thickness (mm) Select 1, 2 or 3 mm.
For any other thicknesses, please contact our product support team
Shape If you require any other shape, please contact our product support team
Diameter (mm) Minimum: 5 mm, Maximum: 49 mm diameter.
Please contact product support to request any filters with different diameters
This size filter is outside of our standard range. Please contact us to discuss manufacturing feasibility and get a custom quote.
Length (mm) Minimum: 5 mm, Maximum: 49 mm.
Please contact product support to request filters with different dimensions
This size filter is outside of our standard range. Please contact us to discuss manufacturing feasibility and get a custom quote.
Width (mm) Minimum: 5 mm, Maximum: 49 mm.
Please contact product support to request filters with different dimensions
This size filter is outside of our standard range. Please contact us to discuss manufacturing feasibility and get a custom quote.
Quantity Maximum quantity 25 pcs.
For larger volumes, please contact our product support team
Typical 3-4 week delivery. Delivery date to be confirmed at time of order.
Standard Manufacturing Tolerances:
Edge length and diameter +/-0.2 mm
Thickness For ≤ 1mm: ± 0.1mm
For > 1 – 3mm: ± 0.2mm
Surface Quality 60 – 40
Surface Accuracy ≤8 Waves
Parallelism ≤3 arcmin
Clear Aperture ≥90%
Edges & Bevels Round parts ≥ ∅5mm: polished edges & protective bevel
Square & rectangular parts < 50 x 50mm: polished edges, no bevel
Edge Chips For ≤ ∅80mm: < 0.3mm (5/E0.3),
for ≥ ∅81mm < 0.6mm (5/E0.6)

Surface quality according to DIN ISO 10110:
Polishing quality P2
Defects 5/3 x 0.63
All edges machined
Round filters with chamfer max. 0.5mm, square and rectangular < 50x50mm without chamfer
Edge chips permitted up to 5/E0.3
General Information SCHOTT Optical Filter Glass:
BG Blue, blue-green, and multiband glasses
GG Nearly colorless to yellow glasses, IR transmitting
KG Virtually colorless glasses with high transmission in the visible and absorption in the IR
NG Neutral density glasses with uniform attenuation in the visible range
OG Orange glasses, IR transmitting
RG Red and black glasses, blocking visible, IR transmitting
UG Black and blue glasses, UV transmitting
VG Green glasses
WG Colorless glasses with different cut-offs in the UV, transmitting in the visible and IR ranges
Note: The spectral curves above show the internal transmittance of the individual optical filter glasses
Back
 

Frequently Purchased Together

Compatible Mounts

Title  Type Compare Stock Number   Price  Buy
Spring Mount Filter Holder, Metric Fixed #55-531 £69.27
Request Quote
  • 3-4 days
    ×
40mm Sq., Fixed Filter Holder Fixed #54-997 £74.38
Request Quote
  • 3-4 days
    ×
Filter Kinematic Mount, 2-Screw Adjustable - Tip-Tilt #58-874 £100.30
Request Quote
  • 3-4 days
    ×
60mm sq - Rectangular Bar Clamp Fixed #54-995 £100.30
Request Quote
  • 3-4 days
    ×
Filter Kinematic Mount, 3-Screw Adjustable - Tip-Tilt #58-875 £108.80
Request Quote
  • 3-4 days
    ×
50/50.8mm Sq. Kinematic Mount, 2 Screws Adjustable - Tip-Tilt #58-858 £112.20
Request Quote
  • 3-4 days
    ×
50/50.8mm Sq. Kinematic Mount, 3 Screws Adjustable - Tip-Tilt #58-861 £123.25
Request Quote
  • In Stock
    ×