COMPACT, HOLOGRAPHIC CORRECTION OF ABERRATED TELESCOPES

We demonstrate a compact reflector telescope design that incorporates the holographic correction of a large, low-quality primary spherical m irror by using a laser beacon located at the center of curvature. The simple design makes use of conventional optics and is easily scalable to much larger apertures. Experimental results indicate diffraction-li mited performance from a heavily aberrated 0.5-m-diameter spherical mi rror. (C) 1997 Optical Society of America.