A wireless communication system transmits a data packet from a cell to a terminal and to a diversity relay. A spherical cavity is formed by mating upper mold half 4 and lower mold half 6. The excitation light source emits excitation light for generating fluorescent light on the subject. The total length of the one or more blending zones ranges about 5% to about 35% of the total length of the proceeding zones and the blending zones.