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

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Acktar Blackened Air Slits (unmounted)

Acktar Blackened Air Slits (unmounted)
Stock #12-177 3-4 days
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Outer Diameter (mm):
9.53 ±0.1
Stainless Steel
Slit Length (mm):
Slit Width (μm):
50 ±3
Thickness (mm):
0.01 nominal
Magic Black™
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.