| 摘要 |
PROBLEM TO BE SOLVED: To provide a head-up display device capable of projecting a virtual image on a curved surface.SOLUTION: A curved surface optical system 40 is facingly disposed with: a semi-transmissive curved surface 41 on which parallel light M from a collimating optical system 30 is incident, that reflects a part of the parallel light M, and transmits a part thereof as transmission light; and a reflection curved surface 42 that reflects the parallel light M to the semi-transmissive curved surface 41. Consequently, the curved surface optical system has a convex surface shape on the transmission side such that, when a plurality of beams of transmission light N are emitted and the plurality of beams of emitted transmission light N are reflected by the curved surface, the reflected transmission light N becomes display light N representing a virtual image substantially parallel to a first plane (a YZ plane). |
