Abstract
Rigid tools can confer advantages at certain stages of manufacturing off-axis mirror segments, but the misfit due to surface asphericity and asymmetry poses constraints on their application. Types of misfit are classified and, using least squares, the best-fit tool forms with different distances from the pole of the parent asphere are calculated. The outer mirror segment for the European extremely large telescope is taken as a case-study, assuming a rigid tool size of 150 mm. A simple independent approximation validates the calculation. A close parallel is wavefront misfit in subaperture interferometry, which is also considered.
| Original language | English |
|---|---|
| Article number | 073401 |
| Journal | Optical Engineering |
| Volume | 50 |
| Issue number | 7 |
| DOIs | |
| Publication status | Published - 1 Jul 2011 |
| Externally published | Yes |