| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a lighting fixture capable of preventing deterioration of fixture efficiency due to a light-transmitting member in the lighting fixture having the light-transmitting member for protecting a light source. <P>SOLUTION: The lighting fixture includes a light source 3, a concave reflecting mirror 4 for concentrating light emitted from the light source 3, and the light-transmitting member 51 arranged on an opening of the reflecting mirror 4. The light-transmitting member 51 forms a hemi-spherical surface with a radius R wherein a distance from the center 31 of the light source 3 to an opening edge 41 of the reflecting mirror 4 is equal to R, and minute unevenness 6 is prepared on the surface of the light-transmitting member 51. Thus, interface reflection on the light-transmitting member 51 can be restrained, and light-transmitting efficiency of the light-transmitting member 51 can be improved. <P>COPYRIGHT: (C)2011,JPO&INPIT |
