Slit   Filter      V           X            Signal            Width
                    deg     mm      sig     nV-s    sig       um    sig
  None   None     182.75  41.585  0.00073    8.5    0.04    110.9   0.92

  None   Pyrex    182.75  41.582  0.00050   13.2    0.07     74.5   1.00
  None   Sapphire 182.75  41.590  0.00023   15.4    0.03     91.4   0.32
  None   7um      182.75  41.622  0.00538   1.34    0.22    121.1  16.26
  None   None     182.75  41.563  0.00076   23.3    0.19     90.4   0.88

  None   None     182.75  41.605  0.00039  214.6    1.22     62.7   0.35