Abstract

We describe the fabrication of the 6.5 m f/1.25 primary mirrors for the Multiple Mirror Telescope Conversion and the first Magellan telescope. Figuring was performed with a 1.2 m stressed lap-which bends under active control to match the local curvature of the optical surface-and small passive tools. The figure was measured with IR and visible interferometers, using refractive null correctors to compensate 810 microns of aspheric departure. We present the final measurements as surface maps, synthetic interferograms and synthetic images.

© 1999 Optical Society of America