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NOTCam Entrance Wheel Slits & Masks

The aperture wheel can carry up to 4×50-mm (3 plus one OPEN) and 8×18-mm slits or masks at the telescope focus. The diameter of the cylindrical holes in the wheel are 56mm and 24mm respectively. Currently we have the following:

  • One 22µm slit mounted in a large aperture.
  • One 44µm slit in a small mask.
  • One 64µm slit mounted in a large aperture.
  • One 128µm slit mounted in a large aperture.

  • One 50µm pinhole mounted in a small aperture.
  • One 136µm pinhole in a small mask.
  • One 1mm pinhole mounted in a small aperture.