Virtual image display device

A virtual image display device for presenting a virtual image to a user via a virtual image presentation plate, comprising:

• a display unit that generates an image display light;
• and
• a projection optical system that includes a projection mirror that projects the image display light toward the virtual image presentation plate such that the image display light is incident and reflected on a first concavely curved surface of the virtual image presentation plate diagonally, wherein
• the projection mirror has a second concavely curved surface on which the image display light is incident and reflected diagonally and is arranged such that a direction orthogonal to both a direction of incidence and a direction of reflection of the image display light on the first concavely curved surface and a direction orthogonal to both a direction of incidence and a direction of reflection of the image display light on the second concavely curved surface are orthogonal to each other, and
• the display unit is provided at a focal point of a composite optical system within a meridional plane, the composite optical system being formed by the virtual image presentation plate and the projection optical system, and the focal point of the composite optical system within the meridional plane is a position of convergence of parallel beams assumed to be incident from the user toward the virtual image presentation plate along the meridional plane of the virtual image presentation plate.