Abstract: A headlight module includes a light source to emit light; and a light guide projection optical element including an incidence surface to condense the light, thereby forming a first light, a first reflecting surface to reflect partial light as part of the first light, thereby forming light in a first light distribution pattern having a cutoff line from light other than the partial light, and a second reflecting surface inclined with respect to an optical axis of the light source so as to be farther from the optical axis as a distance from the light source along the optical axis increases. The second reflecting surface forms light in a second light distribution pattern by reflecting second light formed of the partial light reflected by the first reflecting surface and adds the light in the second light distribution pattern to the light in the first light distribution pattern.

Abstract: A headlight module includes: a light source; a condensing optical unit that allows light generated by the light source to enter and transforms the light into condensed light; and a light guide member including a first cutoff line formation part that forms light in a first light distribution pattern from the condensed light, a second cutoff line formation part that forms light in a second light distribution pattern from the condensed light, a first emission surface that emits light in a first illuminance distribution pattern corresponding to the first light distribution pattern, and a second emission surface that emits light in a second illuminance distribution pattern corresponding to the second light distribution pattern. Light in a combined illuminance distribution pattern obtained by adding the light in the first illuminance distribution pattern and the light in the second illuminance distribution pattern is emitted.

Abstract: A headlight module (100) includes a light source (1) to emit first light, a first reflecting surface (21a) to reflect partial light (R1a) as part of the first light, thereby forming light (R1b, R1c) in a first light distribution pattern having a cutoff line from light other than the partial light (R1a), and a second reflecting surface (22a) inclined with respect to an optical axis (C1) of the light source (1) so as to be farther from the optical axis (C1) as a distance from the light source along the optical axis (C1) increases. The second reflecting surface (22a) forms light (R3) in a second light distribution pattern by reflecting second light (R2) formed of the partial light (R1a) reflected by the first reflecting surface (21a) and adds the light (R3) in the second light distribution pattern to the light (R1b, R1c) in the first light distribution pattern.

Abstract: A headlight module includes: a light source; a condensing optical unit that allows light generated by the light source to enter and transforms the light into condensed light; and a light guide member including a first cutoff line formation part that forms light in a first light distribution pattern from the condensed light, a second cutoff line formation part that forms light in a second light distribution pattern from the condensed light, a first emission surface that emits light in a first illuminance distribution pattern corresponding to the first light distribution pattern, and a second emission surface that emits light in a second illuminance distribution pattern corresponding to the second light distribution pattern. Light in a combined illuminance distribution pattern obtained by adding the light in the first illuminance distribution pattern and the light in the second illuminance distribution pattern is emitted.