| 摘要 |
An electric lamp (1) according to the present invention is so constructed that it comprises a bulb (2) comprising a first curved face (10), the first curved face having a substantially ellipsoidal shape in cross section with a first focal point (F1) and a second focal point (F2), and being convex outwardly, and a filament (6) comprising a coil part (16) formed by winding a wire and generating a light by being energized, the filament being so arranged that the coil part (16) is positioned in an inner space (5) of the bulb (2), wherein a reflective coating is formed on the whole of outer surface or the whole of inner surface of the first curved face (10), and wherein the first curved face (10) is so adapted that the first focal point (F1) is positioned at the coil part (16), and the second focal point (F2) is positioned at a light transmission medium (20) to which an emerged light generated at the coil part (16) and reflected on the first curved face (10) is provided. |
