Vehicle headlight

摘要

A vehicle headlight capable of switching beams between low and high beams by vertically tilting a reflector by a predetermined angle so that upward forward visibility ahead of a vehicle can be secured during high-beam traveling by using a light distribution pattern having a cutoff line as a low-beam light distribution pattern. An upward deflection prism, projecting substantially perpendicularly downward from an upper side of a reflector up to a vicinity of a height position of an upper end edge of the reflective surface of the reflector, is provided in the vicinity of the front of the front end opening of the reflector. Part of the light reflected from the reflective surface of the reflector is made incident on the upward deflection prism interlocked with the upward tilting of the reflector when a low beam is switched to a high beam, whereby part of the beam is deflected and emitted to the vicinity of a position over a cutoff line by means of the deflecting and transmitting functions of the upward deflection prism.