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50μm x 3mm, Mounted, Acktar Blackened Air Slit

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Acktar Blackened Air Slits (mounted)

Acktar Blackened Air Slits (mounted)
Stock #12-181 3-4 days
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Outer Diameter (mm):
25.0 ±0.2
Stainless Steel
Slit Length (mm):
Slit Width (μm):
50 ±3
Diameter of Mount (mm):
25.0 ±0.2
Thickness (mm):
0.01 nominal
Magic Black™
Mount Thickness (mm):
3.0 ±0.1
Absorbance (%):
Model Number:

Regulatory Compliance

RoHS 2015:
Certificate of Conformance:
Reach 240:

Product Family Description

  • Wide-Band Low Reflectance Coating
  • 99% Absorbance from the EUV to SWIR
  • Slit Sizes Down to 25μm x 3mm
  • Unmounted and Mounted Versions Available

Acktar Blackened Air Slits are ideal for light aperture applications where back reflections from light sources are a concern. These air slits feature stainless steel substrates coated with Acktar’s Magic Black™ coating, which is a super black, low reflectance coating used in wavelengths from the extreme ultraviolet (EUV) to the short-wave infrared (SWIR). This wide-band coating is stable in temperatures up to 380°C and has no particulation from use. Acktar Blackened Air Slits are coated on both sides, including the slit edge, and are available unmounted or mounted for increased mechanical stability.

Note: Please contact us for custom slit sizes.