| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a light source device that has high light utilization efficiency and a narrow light emission angle, is simple and inexpensive, and can be miniaturized. <P>SOLUTION: A light emitting device 11 emits light in the ±y-axis direction and ±z-axis direction around the x-axis direction on the basis of its light distribution characteristics. Light emitted in the x-axis direction from the light emitting device 11 is reflected parallel to the yz-plane on a device reflecting face 12, so that most part of the light is reflected in the y-axis direction on a device reflecting face 14 whereas the remainder is directly emitted in the y-axis direction. On the other hand, light emitted in the ±y-axis direction and ±z-axis direction from the light emitting device 11 is light emitted in parallel to the yz plane, so that most of the light is reflected in the y-axis direction on the device reflecting face 14 whereas the remainder is directly emitted in the y-axis direction. Thus, the light emitted from a light emitting device is effectively used, and high light use efficiency is ensured. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
