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3.5 OD, 50mm Dia., NIR II Coated, Absorptive ND Filter

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Anti-Reflection (AR) Coated HOYA Absorptive Neutral Density (ND) Filters

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Stock #13-267 3-4 days
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£132.60
Qty 1-10
£132.60
Qty 11+
£116.45
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Diameter (mm):
50.00
Optical Density OD (Average):
3.5 ±0.2 @ 400-700nm (Uncoated Filter)
Nominal Optical Density @ Center of Coating:
2.77 @ 1200nm
Glass/Filter Number:
Hoya ND-006
Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More
ND Filter Glass
Coating:
NIR II (750-1550nm)
Index of Refraction nd:
1.531
Surface Quality:
80-50
Transformation Temperature (°C):
542
Thickness (mm):
2.50
Thickness Tolerance (mm):
±0.5
Transmission (%):
0.03 (average) @ 400 - 700nm
Type:
Neutral Density Filter
Blocking Wavelength Range (nm):
400 - 700
Dimensional Tolerance (mm):
±0.1
Parallelism (mm):
<0.02
Coating Specification:
Rabs ≤1.5% @ 750 - 800nm
Rabs ≤1.0% @ 800 - 1550nm
Ravg ≤0.7% @ 750 - 1550nm
Wavelength Range (nm):
750 - 1550
Stock No. of Uncoated Filter:
#36-270

Regulatory Compliance

RoHS 2015:
Compliant
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Certificate of Conformance:
View
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Reach 233:
Compliant
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Product Family Description

  • Optical Densities from 0.1 to 4.0
  • VIS 0°, NIR I, and NIR II Coating Options
  • 12.5, 25, and 50mm Diameter Sizes
  • Uncoated HOYA or SCHOTT ND Filters Also Available

Anti-Reflection (AR) Coated HOYA Absorptive Neutral Density (ND) Filters feature HOYA colored glass substrates that are AR coated on both surfaces to reduce back reflections in the visible or near-infrared (NIR) spectra. VIS 0°, NIR I, and NIR II broadband AR coatings cover the spectral ranges of 425-675nm, 600-1050nm, and 750-1550nm. These neutral density filters attenuate light via absorption and can be stacked together to achieve custom optical densities to meet application requirements. Anti-Reflection (AR) Coated HOYA Absorptive Neutral Density (ND) Filters are ideal for use in imaging and detection applications to reduce stray light, as well as in general filter stacking applications to control intensity. The standard metric diameters of 12.5, 25, and 50mm are compatible with our TECHSPEC® C, S, and T-Mount Circular Optic Mounts for benchtop applications.