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 component. This kind of optical density filters absorb or reflect untransmitted light to evenly reduce transmission in a given part of the spectrum.

 

Ecoptik (also known as BRD Optical) provides different types of neutral density filters wholesale. If you want to get the neutral optical density lens filters price, please feel free to contact us.

 

Description Of Neutral Optical Density Filter

 

Ecoptik 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.

 

This kind of optical density filters can be used for video, waterfalls, ophthalmology and landscape photography.

 

Specifications Of Neutral Optical Density Filter

 

Material

BK7

Diameter   tolerance

+0.0/-0.1mm

Thickness   tolerance

±0.1mm

Parallelism

<3 arc min

Flatness

λ~λ/10

Clear aperture

>90%

Density   tolerance

±2%

 

Part No.

Wanvelength   Range
   (nm)

Optical Density   (OD)
   @550nm

ND01

400-1100

0.1

ND02

400-1100

0.2

ND03

400-1100

0.3

ND04

400-1100

0.4

ND05

400-1100

0.5

ND06

400-1100

0.6

ND07

400-1100

0.7

ND08

400-1100

0.8

ND09

400-1100

0.9

ND10

400-1100

1

ND20

400-1100

2

ND30

400-1100

3

ND40

400-1100

4

ND50

400-1100

5

 


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