An optical solution for the radioastronomic observation bands of the new 40m radiotelescope of Centro Astronomico de Yebes - Garcia, E; de Haro, L; Fernandez, JAL; Tercero, F; Galocha, B; Barcia, A; Besada, JL; (2002 3rd International Conference On Microwave And Millimeter Wave Technology Proceedings, 2002)