A high temperature camera apparatus having an elongated steel camera housing tube and an elongated camera support member, supporting a video camera at the furnace interior end of the camera housing tube. A ceramic heat shield tube telescopically surrounds at least a portion of the camera, and preferably...http://www.google.com/patents/US20010013892?utm_source=gb-gplus-sharePatent US20010013892 - Furnace video camera apparatus
