度角尺度干涉儀 (Degree Angular Scale Interferometer，DASI)是位於南極的一座天文望遠鏡。這個干涉儀擁有13個透鏡波紋喇叭（lensed corrugated horn），操作頻率在26 and 36 GHz之間共分為十個頻帶。這儀器的設計與宇宙背景成像儀（Cosmic Background Imager）與極小陣列類似。2002年，DASI團隊首先宣佈發現宇宙微波背景的偏振各向異性。[1]
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