| 摘要 |
PROBLEM TO BE SOLVED: To provide a clear image further effectively with a simple and inexpensive structure for projecting the image on a screen inside a magnetic shield room by using a lens system from outside the magnetic shield room. SOLUTION: The optical apparatus comprises an incoming lens 12 for letting an image of a projector 13 come in, a cylinder 4 piercing through the wall of the magnetic shield room for guiding the incoming image of the projector 13 into the magnetic shield room through the wall of the magnetic shield room, cylinders 2 and 3, mirrors 6, 9 and 11 or prisms, relay lenses 15 and 16, and a projection lens 18 for relaying and projecting the image guided into the magnetic shield room. |
