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SCHOTT NG1, 25mm Dia., 1mm Thick, Absorptive ND Filter

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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
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Stock #14-075 3-5 days
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A$70.40
Qty 1-10
A$70.40
Qty 11+
A$60.80
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Product Details

Type:
Neutral Density Filter

Physical & Mechanical Properties

Diameter (mm):
25.00
Thickness (mm):
1.00 ±0.1
Parallelism (arcmin):
≤3
Dimensional Tolerance (mm):
±0.2

Optical Properties

Optical Density OD (Average):
4.84
Glass/Filter Number:
Coating:
Uncoated
Index of Refraction nd:
1.52
Surface Quality:
60-40
Transmission (%):
0.001
Transmission Tolerance (%):
(nominal)
Optical Density Tolerance (%):
(nominal)

Material Properties

Transformation Temperature (°C):
471

Regulatory Compliance

RoHS:
Reach 223:
Certificate of Conformance:

Product Family Description

  • 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
Filter

Understanding Neutral Density Filters

Neutral Density (ND) Filters are designed to evenly reduce transmission. For more information on specifications and products, read more at Edmund Optics.

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What is an ND Filter?

Can I place ND filters back-to-back and increase optical density?

What is the difference between using an absorptive ND filter and a reflective ND filter?

How should I orient my reflective ND or interference filter?

Continuously Variable Apodizing Filter

Neutral Density Filter (ND)

Optical Filters

Do you want to learn about optical filters? Find terminology, fabrication techniques, a selection guide, and application examples at Edmund Optics.

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How do I clean my filters?

What is the largest diameter filter available from Edmund Optics®?

What are some of the most common filter substrates?

How do I select the right filter for my application?

What types of filters can Edmund Optics® manufacture?

Filter

Optical Density (OD)

Stopband

Removing Protective Plastic Coating

A protective plastic coating protects a variety of our flat optics, such as optical windows, optical mirrors, and beamsplitters, from scratches during shipping.

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Transmission

How do I clean my optics?

Clear Aperture (CA)

Edmund Optics Global Manufacturing Facilities

Edmund Optics® (EO) manufactures millions of precision optical components and subassemblies every year in our 5 global manufacturing facilities.

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Metrology at Edmund Optics: Measuring as a Key Component of Manufacturing

Learn about the metrology that Edmund Optics® uses to guarantee the quality of all optical components and assemblies.

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Surface Quality

Title  Type Compare Stock Number   Price  Buy
25.0mm Optic Dia., Optic Mount Fixed #64-560 A$48.80
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5.0 - 25.0mm Optic Height, Metric Bar-Type Optic Holder Fixed #55-529 A$152.00
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7.0 - 40.0 Optic Height, English Bar-Type Optic Holder Fixed #03-676 A$158.40
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10.0 - 60.0mm Optic Height, Metric Bar-Type Optic Holder Fixed #55-530 A$161.60
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7.0 - 67.0 Optic Height, English Bar-Type Optic Holder Fixed #03-669 A$172.80
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8.0 - 118.0 Optic Height, English Bar-Type Optic Holder Fixed #03-666 A$179.20
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25.0/25.4mm Optic Dia., Optical Cell Assembly Fixed #36-461 Clearance A$220.80
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4.0 - 36.0mm Optic Dia., Self-Centering Jaw Clamp Fixed #16-077 A$235.20
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2"/50.8mm Diameter, Bar Type Lens / Filter Holder, Quick Start Optical Mounts Fixed #17-530 A$240.40
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25.0/25.4mm Optic Dia., X-Y Translating Optic Mount Adjustable - Linear (XY) #62-956 A$412.80
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25.0/25.4mm Optic Diameter, X-Y Translating Quick Start Optical Mounts Adjustable - Linear (XY) #17-513 A$482.00
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5.0 - 100.0mm Optic Dia., Self-Centering Jaw Clamp Fixed #16-078 A$612.80
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25.0/25.4mm Optic Dia., Precision Gimbal Mount Adjustable - Gimbal #54-999 A$688.00
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25/25.4mm ID, Precision Gimbal Mount, Quick Start Optical Mounts Adjustable - Gimbal #17-517 A$773.20
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25.0/25.4mm Optic Dia., X-Y-Z Translating Optic Mount Adjustable - Linear (XYZ) #62-959 A$808.00
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25.0/25.4mm Optic Dia., 5 Axes Optical Mount Adjustable - Linear (XYZ) & Tip-Tilt #13-776 A$1,128.00
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Please enter your required specifications here:
Filter Number
This size filter is outside of our standard range. Please contact us to discuss manufacturing feasibility and get a custom quote.
This size filter is outside of our standard range. Please contact us to discuss manufacturing feasibility and get a custom quote.
This size filter is outside of our standard range. Please contact us to discuss manufacturing feasibility and get a custom quote.
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