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Neutral density (by absorption) filters
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Neutral density (by absorption) filters

Main features

 

  • Optical density selection from 0,1 to 4
  • ⌀25,4 mm standard diameter
  • Excellent for low-power applications
  • Custom dimensions, optical densities are available upon request

 

Application examples

 

  • Overexposure prevention for cameras and other detectors
Request custom View stock
  • Description
  • Standard specifications

Neutral density (by absorption) filters are designed for a flat transmission over a particular wavelength range and defined by the optical density (OD). Overall optical attenuation is a sum of optical absorption in neutral density optical glass and Fresnel reflection losses. Neutral density optical filter densities add up when used in series.

Neutral density (by absorption) filters
Material Neutral density optical glass
Design wavelength 450-650 nm
Optical density tolerance ±5%
Clear aperture >85%
Face dimensions tolerance +0,0/-0,2 mm
Parallelism error <3 arcmin
Protective chamfers <0,35 mm at 45°
Surface quality 60-40 S-D
Surface flatness <1λ@632,8 nm
Coatings Uncoated, available upon request

 

Order your item
Face dimensions Design wavelength Optical density Transmission SKU PRICE QUANTITY
⌀25,4 mm
450-650 nm
0,1
79%
6498
21 €
⌀25,4 mm
450-650 nm
0,2
63%
6499
21 €
⌀25,4 mm
450-650 nm
0,3
50%
6500
21 €
⌀25,4 mm
450-650 nm
0,4
40%
6501
21 €
⌀25,4 mm
450-650 nm
0,5
32%
6502
21 €
⌀25,4 mm
450-650 nm
1
10%
6503
21 €
⌀25,4 mm
450-650 nm
1,5
3%
6504
21 €
⌀25,4 mm
450-650 nm
2
1%
6505
21 €
⌀25,4 mm
450-650 nm
3
0,1%
6506
21 €
⌀25,4 mm
450-650 nm
4
0,01%
6507
21 €