Andover Corporation

ISO 9001:2000
Quick Part No. Search
about-usproduct & servicespress & eventsCartSearch
Home » Products & Services » Neutral density filter sets

 Neutral Density Filter Sets
Metallic ND Filter Sets    
Absorptive ND Filter Sets  

 

We offer two types of neutral density filter sets: the metallic type and the absorptive type. The metallic type is mainly used in attenuation applications, and the absorptive type is used in calibration applications.

All ND sets are supplied with a hardwood storage case for convenient and safe storage 

 

Metallic Neutral Density Filter Sets

 General Specifications
Thickness: 1.5mm
Dimensional Tolerances: ±0.5mm
Clear Aperture: 90% of diameter
Surface Quality: 60/40 Per MIL-0-13830B
Coating Quality: 40/20 Per MIL-0-13830B
Coating Adherence: Per MIL-M-13508C
Humidity: Per MIL-STD-810C
Max. operating temperature: +100°C
Optical Quality: Flatness of 3 to 5 waves per inch
and parallelism of 3 arc minutes or better

Metallic Neutral Density Filter Sets (7 pieces)

 
Consists of the following densities: 0.10, 0.30, 0.50, 1.0, 2.0, 3.0 and 4.0
Available in four different sizes, and two different substrate materials.
See the Metallic ND section for complete specifications of the individual parts.

Filter Size

Substrate
Material

Set Part No.
Click to add to cart
12.5mmØ Glass 128FA52-12.5
25.0mmØ Glass 128FA52-25
50.0mmØ Glass 128FA52-50
50.0mm sq. Glass 128FA52-50S
12.5mmØ Fused Silica 130FA46-12.5
25.0mmØ Fused Silica 130FA46-25
50.0mmØ Fused Silica 130FA46-50
50mm sq. Fused Silica 130FA46-50S


Metallic Neutral Density Filter Sets (17 pieces)

 
Consists of the following densities: 0.10, 0.15, 0.20, 0.30, 0.40, 0.50, 0.60, 0.70, 0.80, 0.90, 1.0, 1.30, 1.50, 2.0, 2.50, 3.0 and 4.0
Available in four different sizes, and two different substrate materials.
See the Metallic ND section for complete specifications of the individual parts.

Filter Size

Substrate
Material

Set Part No.
Click to add to cart
12.5mmØ Glass 132FA52-12.5
25.0mmØ Glass 132FA52-25
50.0mmØ Glass 132FA52-50
50.0mm sq. Glass 132FA52-50S
12.5mmØ Fused Silica 134FA46-12.5
25.0mmØ Fused Silica 134FA46-25
50.0mmØ Fused Silica 134FA46-50
50mm sq. Fused Silica 134FA46-50S

 

Absorptive Neutral Density Filter Sets

 General Specifications
Clear Aperture: 90% of diameter
Surface Quality: 60/40 Per MIL-0-13830B
Max. operating temperature: +100°C

Substrate Material:

Schott® absorption type glass
Optical Quality: Flatness of 3 to 5 waves per inch
and parallelism of 3 arc minutes or better
Anti-Reflection Coatings:

< or = to 0.5% avg. per surface
from 400nm to 700nm

Absorptive Neutral Density Filter Sets (7 pieces)

 
Consists of the following densities: 0.10, 0.30, 0.50, 1.0, 2.0, 3.0 and 4.0
Available in two different sizes.
See the Absorptive ND section for complete specifications of the individual parts.

Filter Size

Set Part No.
Click to add to cart
25.0mmØ 135FAND-25
50mm sq. 135FAND-50S

Absorptive Neutral Density Filter Sets (14 pieces)

 
Consists of the following densities: 0.10, 0.20, 0.30, 0.40, 0.50, 0.60, 0.70, 0.80, 0.90, 1.0, 2.0, 3.0 and 4.0
Available in two different sizes.
See the Absorptive ND section for complete specifications of the individual parts.

Filter Size

Set Part No.
Click to add to cart
25.0mmØ 136FAND-25
50mm sq. 136FAND-50S

Website designed & developed by Kirk Communications