Patent ID: 7345822

Claim:
An image display apparatus comprising: an image display device having a display surface for displaying an image; and an ocular optical system having a first surface provided at position which faces an observer's eyeball, a second surface disposed to face said first surface such that a spacing between said first and second surfaces gradually increases toward said image display device from the observer's visual axis, a third surface provided so that said third surface faces the display surface of said image display device, and that one end of said third surface intersects an extension of said first surface, and the other end of said third surface intersects an extension of said second surface, and a medium which is surrounded by said first, second and third surfaces, and which has a refractive index (n) larger than 1 (n>1); said second surface being a reflecting surface that reflects light rays in said ocular optical system, and said second surface having such a surface configuration that a surface configuration in a plane (YZ-plane) containing light rays turned back by said reflecting surface is different from a surface configuration in a XZ-plane perpendicular said YZ-plane.