Patent ID: 7088516

Claim:
A wide field of view head mounted display device comprising: a display element for displaying an image; a dioptric system for projecting a displayed image on said display element; and a catoptric system with a concave mirror adaptable to a wide field of view of horizontally 120 degree per one eye and a convex mirror with which a reflected light on said convex mirror can arrive as an incident light at whole of said concave mirror, wherein: said concave mirror is an ellipsoidal mirror defining a part of an elliptical shape when viewing from a side position thereof or a spherical mirror; said concave mirror is located at the front of a predetermined position for an observing pupil; said convex mirror is a hyperboloid mirror comprising two sheets defining a part of a hyperbola when viewing from a side position thereof, a parabolic mirror defining a part of a parabolic line when viewing from a side position thereof, or a spherical mirror; said convex mirror is located above said dioptric system and in front of and obliquely upward on said predetermined position for the observing pupil, or a half mirror located at the front of the predetermined position for the observing pupil; if the concave mirror is an ellipsoid mirror and the convex mirror is the hyperboloid mirror, one of focus points of said ellipsoidal mirror coincides with one of focus points of said convex mirror, and an other one of focus points of said ellipsoidal mirror is located at said predetermined position for the observing pupil, and an other one of focus points of said convex mirror is located at a lenticular principal point of said dioptric system; if the convex mirror is a parabolic mirror, said dioptric system projects parallel rays of light to said parabolic mirror; and a light of the displayed image on said display element is projected to said convex mirror through said dioptric system and the reflected light of the projected light on said convex mirror arrives as an incident light at said concave mirror, and a virtual image of a beam of reflected light of the incident light on said concave mirror is observed at said predetermined position for the observing pupil.