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0.4 OD 50mm Sq, Absorptive ND Filter

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Stock #46-219 3-5 days
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S$137.75
Qty 1-10
S$137.75
Qty 11+
S$121.80
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Dimensions (mm):
50.0 x 50.0
Optical Density OD (Average):
0.4 ±0.05
Glass/Filter Number:
Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More
ND Filter Glass
Length (mm):
50.00
Coating:
Uncoated
Index of Refraction nd:
1.50
Surface Quality:
80-50
Transformation Temperature (°C):
525
Thickness (mm):
2.50
Thickness Tolerance (mm):
±0.5
Transmission (%):
40.0 (average)
Type:
Neutral Density Filter
Width (mm):
50.00
Blocking Wavelength Range (nm):
400 - 700
Dimensional Tolerance (mm):
±0.2
Parallelism (mm):
<0.02

Regulatory Compliance

RoHS 2015:
REACH 201:
Certificate of Conformance:

Product Family Description

  • Attenuates Visible Light Via Absorption, Rather than Reflection
  • Multiple Filters Can be Stacked for Increased Blocking
  • Optical Densities from 0.1 to 4.0 are Available
  • Also Available Pre-mounted in C-Mount Housings

Hoya Absorptive Neutral Density (ND) Filters possess level spectral transmittance characteristics in the visible region and attenuate light by absorption with minimal reflection. Typically, the neutrality and density of absorptive filters are a function of the material and the thickness. Since Hoya neutral density filters are held to a specific optical density, the thickness is only a function of the glass type. Hoya Absorptive Neutral Density (ND) Filters are useful in light control applications for measuring instruments and exposure control in imaging. Spectral variations occur as optical density increases. 

Optical Density exhibits an additive relationship; for example, stacking filters with OD values of 0.6 and 0.9 yields a resultant density of 1.5. The optical density is related to the transmission by the following equation: T = 10^-OD x 100 = percent transmission.

Note: Due to supply chain issues, our kits may be delivered with an alternative packaging solution in place of a wooden box. For any questions, please contact [email protected].

Filter Simulation Software

Click here to download HOYA’s colored glass filter simulation software which can be used to calculate the internal transmittance and external transmission of each HOYA glass type. The software can simulate the performance of individual filters with user specified thickness.

Absorptive Neutral Density Filter Kits

#55-222 includes 6 filters in optical density values of 0.15, 0.3, 0.4, 0.6, 0.9 and 2.5. 

#63-468, #63-469, #63-470 and #66-155 each include 14 filters in optical density values of 0.1, 0.15, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.9, 1.0, 1.3, 1.5, 2.0 and 2.5. Please note that OD 3.0 is the only one not included in these kits. 

Title CompareStock Number  Price Buy
25mm Dia, Absorptive ND Filter Kit (6 Filters) #55-222 S$284.20   Request Quote
  • 3-5 days
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12.5mm Dia, Absorptive ND Filter Kit (14 Filters) #63-468 S$465.45   Request Quote
  • 3-5 days
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25mm Dia, Absorptive ND Filter Kit (14 Filters) #63-469 S$617.70   Request Quote
  • Contact Us
    ×
50mm Square, Absorptive ND Filter Kit (14 Filters) #63-470 S$1,464.50   Request Quote
  • 3-5 days
    ×
50mm Dia, Absorptive ND Filter Kit (14 Filters) #66-155 S$1,464.50   Request Quote
  • 3-5 days
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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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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?

Stopband

Filter

Optical Density (OD)

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
Spring Mount Filter Holder, Metric Fixed #55-531 S$116.00
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  • 3-5 days
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40mm Sq., Fixed Filter Holder Fixed #54-997 S$124.70
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  • 3-5 days
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60mm sq - Rectangular Bar Clamp Fixed #54-995 S$168.20
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  • 3-5 days
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Filter Kinematic Mount, 2-Screw Adjustable - Tip-Tilt #58-874 S$171.10
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  • 3-5 days
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Filter Kinematic Mount, 3-Screw Adjustable - Tip-Tilt #58-875 S$185.60
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  • 3-5 days
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50/50.8mm Sq. Kinematic Mount, 2 Screws Adjustable - Tip-Tilt #58-858 S$191.40
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  • 3-5 days
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50/50.8mm Sq. Kinematic Mount, 3 Screws Adjustable - Tip-Tilt #58-861 S$210.25
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  • 3-5 days
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