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Metallic Neutral Density Filters

Metallic Neutral Density Filters

 

Metallic Coated

Metallic-coated neutral density (ND) filters obtain their optical density from a metal alloy coating on

a substrate determined by the wavelength region of interest. Unlike the all-dielectric or absorption

type, the metallic type ND filter employs a combination of absorption and reflection to reduce

the intensity of light. While able to withstand more incident energy than the absorptive type,

metallic ND filters are suitable only for low-power applications. (Note: If used in series, these filters

should be tilted to avoid multiple reflections and any reduction of density).


       Applications：

  • Calibration
  • Attenuation
  • Low-Power Lasers
  • Scientific Measurements and Research
  • Machine Vision and Other Imaging Applications

General Specifications

Thickness:                                       1.5 ±0.5mm

Dimensional Tolerances:                 +0/-0.2mm

Clear Aperture:                                90% of outside dimension

Surface Quality:                               80/50 per MIL-0-13830B

Coating Adherence:                        Per MIL-M-13508C

Humidity:                                         Per MIL-STD-810F

Max. Operating Temperature:         +100°C

Substrate Materials:                        Glass (350–2000nm region) or

                                                        fused silica (250–2000nm region)

Optical Quality:                                Glass: Flatness of 3–5 waves per inch and parallelism

                                                        of 3 arc minutes or better. Fused Silica: Flatness of λ/4

                                                        per inch and parallelism of 30 arc seconds or better.

Mechanical:                                    Unmounted

Optional: Mounted in threaded ring - see pg 60 for thread sizes

 



METALLIC NEUTRAL DENSITY SPECIFICATIONS

Metallic Neutral Density Transmittance Specifications
  Transmission Deviation From Normal
Optical
Density (OD)		 Nominal
Transmittance (%)		 250nm to
350nm		 350nm to
700nm		 700nm to
800nm		 800nm to 
2000nm
0.10 79.49 ± 8% ± 2% ± 2% ± 8%
0.15 70.79 ± 7% ± 2% ± 2% ± 7%
0.20 63.10 ± 6% ± 2% ± 2% ± 6%
0.30 50.12 ± 5% ± 2% ± 2% ± 5%
0.40 39.81 ± 4% ± 1.5% ± 1.5% ± 4%
0.50 31.62 ± 4% ± 1.5% ± 1.5% ± 4%
0.60 25.12 ± 4% ± 1.5% ± 1.5% ± 4%
0.70 19.95 ± 4% ± 1.5% ± 1.5% ± 4%
0.80 15.85 ± 4% ± 1.5% ± 1.5% ± 4%
0.90 12.59 ± 3.5% ± 1.0% ± 1.0% ± 3.5%
1.00 10.00 ± 3.5% ± 1.0% ± 1.0% ± 3.5%
1.30 05.01 ± 3.0% ± 1.0% ± 1.0% ± 3.0%
1.50 03.16 ± 1.5% ± 0.5% ± 0.5% ± 1.5%

金属镀膜型中性密度滤光片选型表：

Optical
Density
O.D.		 Nominal
Transmittance (%)		 12.5mmØ 25mmØ 50mmØ 50mm x 50mm
0.10 79.43 010FN46-12.5 010FN46-25 010FN46-50 010FN46-50S
0.15 70.79 015FN46-12.5 015FN46-25 015FN46-50 015FN46-50S
0.20 63.10 020FN46-12.5 020FN46-25 020FN46-50 020FN46-50S
0.30 50.12 030FN46-12.5 030FN46-25 030FN46-50 030FN46-50S
0.40 39.81 040FN46-12.5 040FN46-25 040FN46-50 040FN46-50S
0.50 31.62 050FN46-12.5 050FN46-25 050FN46-50 050FN46-50S
0.60 25.12 060FN46-12.5 060FN46-25 060FN46-50 060FN46-50S
0.70 19.95 070FN46-12.5 070FN46-25 070FN46-50 070FN46-50S
0.80 15.85 080FN46-12.5 080FN46-25 080FN46-50 080FN46-50S
0.90 12.59 090FN46-12.5 090FN46-25 090FN46-50 090FN46-50S
1.00 10.00 100FN46-12.5 100FN46-25 100FN46-50 100FN46-50S
1.30 5.01 130FN46-12.5 130FN46-25 130FN46-50 130FN46-50S
1.50 3.16 150FN46-12.5 150FN46-25 150FN46-50 150FN46-50S
2.00 1.00 200FN46-12.5 200FN46-25 200FN46-50 200FN46-50S
2.50 0.32 250FN46-12.5 250FN46-25 250FN46-50 250FN46-50S
3.00 0.10 300FN46-12.5 300FN46-25 300FN46-50 300FN46-50S
4.00 0.01 400FN46-12.5 400FN46-25 400FN46-50 400FN46-50S

VIS-NIR ND filters （VIS-NIR中性密度滤光片，玻璃基底，350-2000nm）
   
Optical
Density
O.D.		 Nominal
Transmission(%)		 12.5mmØ 25mmØ 50mmØ 50mm x 50mm
0.10 79.43 010FN52-12.5 010FN52-25 010FN52-50 010FN52-50S
0.15 70.79 015FN52-12.5 015FN52-25 015FN52-50 015FN52-50S
0.20 63.10 020FN52-12.5 020FN52-25 020FN52-50 020FN52-50S
0.30 50.12 030FN52-12.5 030FN52-25 030FN52-50 030FN52-50S
0.40 39.81 040FN52-12.5 040FN52-25 040FN52-50 040FN52-50S
0.50 31.62 050FN52-12.5 050FN52-25 050FN52-50 050FN52-50S
0.60 25.12 060FN52-12.5 060FN52-25 060FN52-50 060FN52-50S
0.70 19.95 070FN52-12.5 070FN52-25 070FN52-50 070FN52-50S
0.80 15.85 080FN52-12.5 080FN52-25 080FN52-50 080FN52-50S
0.90 12.59 090FN52-12.5 090FN52-25 090FN52-50 090FN52-50S
1.00 10.00 100FN52-12.5 100FN52-25 100FN52-50 100FN52-50S
1.30 5.01 130FN52-12.5 130FN52-25 130FN52-50 130FN52-50S
1.50 3.16 150FN52-12.5 150FN52-25 150FN52-50 150FN52-50S
2.00 1.00 200FN52-12.5 200FN52-25 200FN52-50 200FN52-50S
2.50 0.32 250FN52-12.5 250FN52-25 250FN52-50 250FN52-50S
3.00 0.10 300FN52-12.5 300FN52-25 300FN52-50 300FN52-50S
4.00 0.01 400FN52-12.5 400FN52-25 400FN52-50 400FN52-50S

2、吸收型中性密度滤光片

吸收型中性密度滤光片技术参数：
General Specifications
Thickness: 4.0mm (maximum)
Dimensional
Tolerances:		 ±0.5mm
Clear Aperture: 90% of diameter
Surface Quality: 60/40 Per
MIL-0-13830B
Max. operating
temperature:		 +100°C
Substrate
Material:		 Schott®
absorption glass
Optical Quality: Flatness of 3 to 5 waves
per inch and parallelism
of 3 arc minutes or better
Anti-Reflection
Coatings		 < or = .5% avg.
per surface from 
400nm to 700nm
Mechanical: Not mounted
in metal holder


 

 

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