TEST - the TElescope and STar simulator for BUSCA

TEST has been designed by Jürgen Schmoll and Klaus Bagschik to analyse the optical performance of the BUSCA beam splitter, in particular the correction for astigmatism. The main goal was to produce at the output an f/8 beam with a large back focal distance of about 400mm where the whole beam splitter unit can be placed. The basic arrangement is that of two Newton type telescopes looking face to face.

TEST can be used in two modes