DOTI has manufactured many mirrors for small and simple to large and complex arrays. DOTI has been selected as the Sole Source Supplier for several projects due to the accuracy of our polished surfaces, our ability to machine multiple, accurate through-holes for mounting (and other functions) and for our ability to meet the delivery requirements of our customers. Currently, DOTI is the sole supplier of mirrors to the VERITAS Program that is to be installed at Mt. Wilson, AZ under the direction of the Smithsonian Astrophysical Observatory for and by the VERITAS' members. DOTI has also supplied mirrors for Gamma Ray Research to the University of Chicago, Case Western Reserve University, University of California-Riverside, and others.