Astronomical Applications Department, U.S. Naval Observatory - Beam Comp Example (Page 47)

Astronomical Applications Department, U.S. Naval Observatory Beam Comp Example Page 47

OPD

radius (cm)

Wavefront Error (pm)

Now the residual coma terms are apparent at about 3 picometers. We see that the
compensating rotation of the primary has reduced the coma aberration by 6 orders of

magnitude. The residual is due to the

2

component of the coma, which we did not correct for

in the rotation. Let's see what else besides coma that we have left. We should expect a very
small astigmatism.

>

PlotZernikeWavefront( opd, [Delta,psi], c,
[[0,0],[1,1],[2,0],[4,0],[6,0],[8,0],[10,0],[12,0],
[3,1],[5,1],[7,1],[9,1],[11,1]],
`fm`, [10*10^(-4),epsilon*arcsec], 100.0, 10.0 );