- WG1 : Theoretical calculations
- WG2 : Surface preparation and tests
| - WG3 Fabrication and test of interferential mirrors
- WG4 Fabrication and tests of diffractive and refractive optics
| | | |
 | COST P7:WG and MC meeting Prague 14-15 May 04 | | | COST P7:WG and MC meeting Rome October 21-23 | |
| COST P7:WG and MC meeting Madrid May 2005 | |  | NEXT MEETING COST P7:WG and MC meeting Budapest October 2005 | |