LIGHT GUIDE MEMBER, OPTICAL UNIT, VIRTUAL IMAGE DISPLAY DEVICE, AND HEAD-MOUNTED DISPLAY

To improve light utilization efficiency.SOLUTION: A light guide member comprises: a first light guide unit having a plurality of reflection surfaces that branches an incident light beam incident from a light incident unit into a plurality of light beams; and a second light guide unit that guides the plurality of light beams branched by the plurality of reflection surfaces and emits the light beams from a light emission unit. The plurality of reflection surfaces includes at least one first reflection surface and at least one second reflection surface. A part of the incident light beam is made incident on the first reflection surface, reflected on the first reflection surface, and guided to the second light guide unit. The second reflection surface reflects the other part of the incident light beam that is not made incident on the first reflection surface and made incident on the second reflection surface, and guides the light beam to the second light guide unit.SELECTED DRAWING: Figure 2 【課題】光利用効率を向上させること。【解決手段】導光部材は、光入射部より入射された入射光束を複数の光束に分岐する複数の反射面を有する第１導光部と、複数の反射面にて分岐された複数の光束を導光して光射出部より射出する第２導光部と、を備える。複数の反射面は、少なくとも１つの第１反射面と、少なくとも１つの第２反射面を含む。入射光束の一部が第１反射面に入射され、第１反射面にて反射されて第２導光部に導光される。第２反射面は、第１反射面に入射されることなく第２反射面に入射された、他の一部の入射光束を反射して、第２導光部に導光する。【選択図】図２