Abstract

In this paper, the Atacama Submillimeter Telescope Experiment (ASTE) is presented. A 10-m aperture telescope hosts a camera equipped with a transition edge sensor (TES). We developed a fore-optics module—“APol,” to convert the 271 pixels of the TES working at 350 GHz into a sensitive imaging polarimeter without sacrificing the image quality and the 7.50 field of view. Here, we describe the detailed optical design of APol and present the results of the preliminary test in a laboratory.