| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a light source device capable of illumination by setting a desirable illumination area where the range of illumination is not centralized and is suitably dispersed even if a light source having strong directivity is used. <P>SOLUTION: The light source device 3 includes: an LED 4 having strong directivity; a reflective hood 7 having a reflecting surface for reflecting the illumination light from this light source inside; and a pair of first and second polarizing reflective plates 9A and 9B for polarizing the illumination light from the LED 4 in a specific direction. The first and second polarizing reflective plates 9A and 9B have a specific length and width, and a back surface formed from a high reflectance plate. The light source 4 is secured to the reflective hood 7. A specific interval is provided between the first and second polarizing reflective plates 9A and 9B and the reflecting surface of the reflective hood 7, and a specific interval is mutually provided with the optical axis passing through the zero direction angle of the light source 4 interposed therebetween. That is, each predetermined inclination angle α is formed with respect to the optical axis so that the interval in the vicinity of the light source is large, and the interval further away is small. <P>COPYRIGHT: (C)2010,JPO&INPIT |
