Optics unit and vehicular lighting fixture
An optics unit includes a light source and a rotary reflector that includes a rotation unit that rotates about an axis of rotation, and a blade mounted to the rotation unit, the blade including a reflective surface that reflects light emitted by the light source. The optics unit further includes a fan that includes a vane that rotates along with the rotation unit.
1. An optics unit, comprising:
a light source;
a rotary reflector that includes:
a rotation unit that rotates about an axis of rotation, and
a blade mounted on the rotation unit, the blade including a reflective surface that reflects light emitted by the light source;
a fan that includes a vane that rotates along with the rotation unit; and
a plurality of fins provided on a surface of the rotary-reflector blade, on a side thereof reverse from its reflective surface.
2. The optics unit according to claim 1 , wherein the fan is a blower fan.
3. The optics unit according to claim 1 , wherein the fan is provided to a side of the rotary reflector reverse from its reflective surface.
4. The optics unit according to claim 1 , provided with an air duct for guiding airflow produced by the fan to either the light source or a motor for rotationally driving the rotary reflector.
5. A vehicular lighting fixture, comprising the optics unit according to claim 1 .
6. The vehicular lighting fixture according to claim 5 , wherein the rotary reflector and the fan are driven starting with either vehicular idling, or when the vehicular lighting fixture is switched to low beam.