Patent ID: 7355795

Claim:
An optical apparatus comprising: means for forming an image to be observed; and an ocular optical system for leading said image to an observer's eyeball, said ocular optical system including, in order from said image side, a third surface which forms an entrance surface, a first surface which forms both a reflecting surface and an exit surface, and a second surface which forms a reflecting surface, said first to third surfaces being integrally formed with a medium disposed therebetween, wherein said means for forming an image is an image display device for forming an image for observation, said device being disposed at a position facing said third surface, said optical apparatus further comprising means for fitting both said device and said ocular optical system to an observer's head, wherein at least said first surface in said ocular optical system is formed from a rotationally asymmetric curved surface so as to correct aberrations produced by a decentered surface having an optical action.