Accessories for Machine Vision Products - STEMMER IMAGING

ACCESSORIES

Important enablers for the perfect solution

MidOpt Neutral Density Filters

Neutral Density Filters ND- and Ni-Series

Neutral density filters work like “sunglasses” for your system and can be used with monochrome or colour cameras. Designed to reduce light intensity neutrally over a specific wavelength range without affecting image colour or contrast, these filters can be stacked with each other to test various optical densities. These filters are available in a variety of optical densities, they can help to minimise the pixel saturation and reduce the light intensity while maintaining a wide aperture and a shallow depth of field.

ND series- Visible Spectrum

This filter series is an absorptive series which is effective from 425 - 675 nm and is available in optical density ranges from 0.10 - 6.0  

Ni series- Broad Spectrum; VIS/NIR

This neutral density filter series is available in optical density ranges from 0.3 - 1.2 with low reflectivity from 400 - 1100 nm. They are coated on low-expansion, heat-resistant Borofloat® glass.



  • Reduces light intensity without affecting colour
  • Reduces depth of field while maintaining same shutter speed
  • Can be used with monochrome and colour cameras in the visible spectrum

Learn more about optical filters in our knowledge base


Markets and Applications

Applications include imaging in intense lighting situations (i.e. molten metal and welding), outdoor aerial imaging and photography. Neutral Density Filters help reduce shutter speed to create blur, preventing a “jello” effect in aerial imaging.


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Model Filter type Filter mounting Diameter (mm) Filter thread Transmittance (wavelength) Transmission (%)
MIDOPT FIL ND030/72 Neutral Density mounted M72 x 0.75 425 - 675 50.00
MIDOPT FIL ND060/27 Neutral Density mounted M27 x 0.5 425 - 675 25.00
MIDOPT FIL ND060/72 Neutral Density mounted M72 x 0.75 425 - 675 25.00
MIDOPT FIL ND090/25.5 Neutral Density mounted M25.5 x 0.5 425 - 675 12.50
MIDOPT FIL ND090/27 Neutral Density mounted M27 x 0.5 425 - 675 12.50
MIDOPT FIL ND090/72 Neutral Density mounted M72 x 0.75 425 - 675 12.50
MIDOPT FIL ND120/27 Neutral Density mounted M27 x 0.5 425 - 675 6.25
MIDOPT FIL ND120/72 Neutral Density mounted M72 x 0.75 425 - 675 6.25
MIDOPT FIL ND180/25.5
MIDOPT FIL ND200/20 SLIP Neutral Density Slipmount 20.0 425 - 675 1.00
MIDOPT FIL ND200/27 Neutral Density mounted M27 x 0.5 425 - 675 1.00
MIDOPT FIL ND200/30.5 Neutral Density mounted M30.5 x 0.5 425 - 675 1.00
MIDOPT FIL ND300/25.5 Neutral Density mounted M25.5 x 0.5 425 - 675 0.01
MIDOPT FIL ND300/31 SLIP Neutral Density Slipmount 31 425 - 675 0.10