The test set adapter collimates the light source provided by the ANV-126/A and focuses it on the Image Tube’s photocathode within the NVD thus creating a Halo image.  The image is focused and the Halo diameter is observed by the user via a crosshair and micrometer measurement procedure.  The system streamlines inspection, maintenance, and performance checks allowing users to observe Halo diameter in existing NVDs’ and allows packaging of image tubes that are ‘within-tolerance’ of Halo diameter specifications.

A U.S. State Department export license is required for all international sales


Key features

  • Focused image
  • Used in conjunction with the ANV-126A and ANV-126 Test Sets


  • Unlikely failure
  • Uses a crosshair and micrometer measurement procedure.