Neutral Density Filter

Neutral Density Filter

Neutral optical density filter is often used in imaging or laser applications to avoid strong light damage to camera sensors or other optical components. ND filters absorb or reflect untransmitted light to evenly reduce transmission in a given part of the spectrum.

If you want to get the neutral optical density lens filters price, please feel free to contact us. BRD Optical can provide different types of neutral density filters.


Description Of Neutral Optical Density Filter


BRD Optical makes fixed OD value neutral density filter by depositing Inconel film on a clear cubstrate. The advantage of the coated density filter is in the broader band and lower ripple than that of absorptive density filter. The coated wavelengthcan be extended to 200nm to 1100nm or more. The disadvantage is that there is some reflective light on the optical filter glass. The OD value can vary from 0.1 to 0.5. The OD value is controlled by coating inconel thin film thickness. Regular thickn thickness of the NDF is 1.1mm or 0.55mm.

Neutral density filters can be used for video, waterfalls, ophthalmology and landscape photography.


Description Of Neutral Density Filter
Description Of Neutral Density Lens Filter

Specifications Of Neutral Optical Density Filter


MaterialBK7
Diameter   tolerance+0.0/-0.1mm
Thickness   tolerance±0.1mm
Parallelism<3 arc min
Flatnessλ~λ/10
Clear aperture>90%
Density   tolerance±2%


Part No.Wanvelength   Range
   (nm)
Optical Density   (OD)
   @550nm
ND01400-11000.1
ND02400-11000.2
ND03400-11000.3
ND04400-11000.4
ND05400-11000.5
ND06400-11000.6
ND07400-11000.7
ND08400-11000.8
ND09400-11000.9
ND10400-11001
ND20400-11002
ND30400-11003
ND40400-11004
ND50400-11005


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