Inverse Extreme USAF tri-bar resolution test target for microscopes.

Transparent Glass Bars in a Chrome Field

Reduces Glare for Trans-Illumination

SKU: 2017_InvUSAF Category: Tag:


  • This target is the inverse polarity of 2015a USAF target.
  • The field is chromium and the tri-bar pattern is transparent quartz glass.
  • Inverse pattern reduces glare for trans-illumination
  • Manufactured by: Ready Optics Company
  • 137 nanometer Single Bar or Space.
  • High Contrast Chromium on Quartz Glass
  • Conforms to 1951 US Air Force MIL-STD-150A
  • Starts at Group 4, Element 1; (31 µm bar width / 62µm period)
  • Ends at Group 11, Element 6 (137 nanometer bar width / 274nm period)


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