Keywords: 050128quad-from-crane.jpg A photograph of the en QUaD telescope inside its groundshield taken from a crane above the telescope The telescope structure consists of a en cassegrain optical system mated to the existing DASI mount surrounded by a reflective groundshield which limits signal contamination by the warm ~200K ground below The secondary mirror is suspended by a large white foam cone which is transparent to microwave frequency radiation en wikipedia 2007-05-23 Rfriedman81 wikipedia en rfriedman81 original upload log page en wikipedia 050128quad-from-crane jpg 2007-05-23 15 12 Rfriedman81 3072×2048×8 1804884 bytes <nowiki>A photograph of the QUaD telescope inside its groundshield take from a crane above the telescope The telescope structure consists of a cassegrain optical system mated to the existing DASI mount surrounded by a reflective groundshield which l</nowiki> QUaD |