Patent ID: 7118260

Claim:
A lamp unit for a vehicle, comprising: a light emitting element that emits light; and a translucent member disposed to cover a forward side of the light emitting element, said translucent member comprising, an inner surface of the translucent member that reflects said emitted light that is incident into the translucent member from the light emitting element, and a reflecting irradiating surface of the translucent member that irradiates the reflected light in a forward direction of the lamp unit, wherein a vertical sectional shape of the reflecting surface, along a plane that passed through a light emitting center of the light emitting element, is concave and formed by a hyperbola having its focusing point substantially near the light emitting center, and the a vertical sectional shape of the irradiating surface along said plane is convex curved shape and formed by an ellipse having its focusing point substantially near a virtual image position of the light emitting element formed by the reflecting surface.