Abstract: A headlight module includes a light source, a light guide element, and a projection optical element. The light source emits light. The light guide element has a reflecting surface for reflecting light emitted from the light source and an emitting surface for emitting light reflected by the reflecting surface. The projection optical element projects light emitted from the emitting surface. In a direction of an optical axis of the projection optical element, an end portion on the emitting surface side of the reflecting surface includes a point located at a focal position of the projection optical element.

Abstract: A headlight unit includes: a light source that emits a light beam for irradiating a forward area in a traveling direction; a light guide portion that receives the light beam and forms planar light having a divergence angle; a projection lens portion that projects the planar light forward; and a drive unit that changes a position of the projection lens portion. The drive unit is disposed in a region overlapping with the projection lens portion, as optically viewed from an optical axis direction of the light guide portion or the projection lens portion.

Abstract: A vehicle headlight module includes: a light source that emits light that becomes illumination light; a light guide component having an incident surface through which the light emitted from the light source enters the light guide component as incident light, a side surface that reflects the incident light to superpose beams of the incident light, and an emitting surface from which the reflected incident light is emitted; and a projection lens that projects the light emitted from the emitting surface. The light guide component has an inclined surface in the side surface. A part of the incident light that has been reflected by the inclined surface is superposed with another part of the incident light that has not been reflected by the inclined surface in a partial region on the emitting surface, so that a luminance of the partial region is higher than a luminance of the other region.

Abstract: A vehicle headlight device 100 according to the present invention includes a first lamp 92 that has a light source 211, an optical system 21, a rolling mechanism 50, and a control circuit 60. The optical system 21 includes a first wedge prism 30 and a second wedge prism 40 in which an incident ray from the light source 211 is deflected and projected. The rolling mechanism 50 rotates the first wedge prism 30 about a rotation axis. The control circuit 60 controls the rolling mechanism 50 so that the first wedge prism 30 is rotated in a direction opposite to a vehicle bank direction in accordance with a vehicle bank angle d. The first wedge prism 30 and the second wedge prism 40 are disposed so that their surfaces perpendicular to the rotation axis face each other. The first wedge prism 30 is disposed so that a wedge angle a1 directs in a road surface direction. The first wedge prism 30 is disposed so as to be rotatable about the rotation axis.

Abstract: A vehicle headlight device 100 includes a light source 11, a Dove prism 40, and a rotation mechanism 50. The light source 11 emits light. The Dove prism 40 changes a propagation direction of light received at an incidence surface 401 to bring the light to a reflecting surface 402, and changes a propagation direction of light reflected at the reflecting surface 402 to output the light from an exit surface 403. The rotation mechanism 50 rotatably supports the Dove prism 40 about a line which passes through the incidence surface 401 and the exit surface 403 as an axis of rotation R, and rotates the Dove prism 40 in a direction opposite to a bank direction of a vehicle body in accordance with a bank angle k of the vehicle body.