Patent ID: 8335041

Claim:
A head mounted display comprising: a display unit that displays an image; a concave mirror that has a first end which is closer to one eye rather than to the other eye and a second end which is closer to the other eye rather than to the one eye; an optical unit that is arranged between the display unit and the concave mirror, and transmits a part of incident light from the display unit and reflects the other part of the incident light from the display unit; a first optical system that guides light reflected by the concave mirror to the other eye; and a second optical system that guides light reflected by the optical unit to the one eye, wherein the first end is closer to the display unit in comparison with the second end, a curvature of the concave mirror at the first end is larger than a curvature of the concave mirror at the second end, the optical unit includes: a transparent base body that has a first convex surface at the side of the display unit and a second convex surface at the side of the concave mirror, and a semi-transmissive layer that covers the second convex surface, the second convex surface has a third end which is closer to the one eye rather than to the other eye and a fourth end which is closer to the other eye rather than to the one eye, the fourth end is closer to the display unit in comparison with the third end, and a curvature of the second convex surface at the fourth end is larger than a curvature of the second convex surface at the third end.