Abstract
The Extremely Large Telescope (ELT) projects presuppose segmented primary mirrors. The metrology of the off-axis aspherical segments is particularly challenging in terms of global form, mid spatial frequencies and matching of the base-radius and conic constant. We propose to use a swing arm profilometer (SAP) to provide verification independent of interferometry. In this paper we present results of a simulation of the swing arm profilometer as applied to mirror segments, and experimental verification of the simulation using a prototype instrument.
| Original language | English |
|---|---|
| Pages (from-to) | 2036-2048 |
| Number of pages | 13 |
| Journal | Optics Express |
| Volume | 18 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 1 Feb 2010 |
| Externally published | Yes |