Bolometer arrays for Mm/Submm astronomy

Arrays consisting of large numbers of sensitive bolometers have become powerful tools for Mm/Submm Astronomy. On large ground-based telescopes for example they were essential in the discovery of a population of faint, highly redshifted point sources which provide important clues to the star-formation history of the universe. The Bolometer group at the Max-Planck-Institut fur Radioastronomie has been developing bolometer arrays since 1980. This paper is meant to give an overview of the state and future of this effort.