  Fundamentally new technology is described for constructing low areal mass
density (1kg/m^2), high precision (< 10micron RMS) reflectors scalable to large
apertures (10 to 20 meters) for use as the primary element of a telescope
system. A large reduction in mass is achieved by minimizing the mass of the
reflective surface using a high reflectivity metallic membrane. A wide field
diffraction limited telescope system can be constructed using the primary
reflector in conjunction with secondary and tertiary optics.
