| 摘要 |
<p>Disclosed is a vehicle headlight that can be made more compact and that is also highly efficient and has excellent cutoff properties. The vehicle headlight (100) is provided with a surface-emitting light source (2), a first reflecting mirror (1), and a lens (3); uses the z-axis facing the direction of vehicle progression; uses the position of the vertex of the first reflecting mirror (1) that has curvature as the coordinate origin (P) and has the light source (2) disposed within the yz plane on the center of curvature of the first reflecting mirror (1) when the horizontal direction intersecting the z-axis is the x-axis and the vertical direction is the y-axis; and fulfills formula (1) when the focal point on the light source (2) side of the first reflecting mirror (1) that is closest to the vertex from the position of the origin (P) is a first focal point, another focal point is a second focal point, the distance from the position of the origin (P) to the position of the first focal point is F1, the distance from the position of the origin (P) to the position of the second focal point is F2, and the distance from the position of the origin (P) to the position of a focal point on the reverse side of the lens (3) in the z-axis direction is F. Formula (1) |F-F1| ? |F2|(mm)</p> |
