How de-focusing makes wavefront errors more apparentΒΆ

The model beams with various amount of defocus for a telescope with moderate coma and the error beam for that focus setting, that is the difference between the model beam and the model beam for a perfect (no coma) telescope.

Defocus Beam Error beam
None bm-zn7-dz0 diff-zn7-dz0
1 rad bm-zn7-dz1 diff-zn7-dz1
2 rad bm-zn7-dz2 diff-zn7-dz2
5 rad bm-zn7-dz5 diff-zn7-dz5

Previous topic

Zernike Polynomials

Next topic

Example of an OOF analysis for the GBT