| 摘要 |
The present invention addresses the problem of inhibiting a reduction in light-condensing properties at light-condensing points, even in cases when light-emission points of a light source are large. This light-condensing light guide is provided with a first reflective surface (50) which extends from an LED package having a plurality of light-emission points (P) provided to a light-emission surface (29) thereof, to at least a place near a light-reception point, and which condenses light from the LED package, and guides said light to the light-reception point. The first reflective surface (50) has a cylindrical shape having, as the central axis (L1) thereof, a line linking the centre (O) of the light-emission surface (29) and the light-reception point. Furthermore, the first reflective surface (50) is formed by overlapping each of a plurality of elliptical reflection planes (70) defined for each of the light-emission points (P) using the light-emission points (P) as first focal points (f1) and the light-reception point as a second focal point (f2). |
