ARScope originally Presented at SIGGRAPH 2008 by the University of Tokyo (yes, the guys behind ARForce), is obviously not a new concept. However, as far as I can see, it got only little coverage at the time, and certainly deserves our attention.
ARScope is an interesting combination of old world metaphors such as a magnifying glass and a crystal ball, head mounted display and projected AR. The user holds a handheld device covered by reflective material, on which an image is projected from a micro-projector the user wears on his head. Two cameras, one on the handheld device and one on the headset, and a sophisticated algorithm are used to calculate the user’s point of view relative to the handheld device, and thus ARScope is able to project a suitable image. In the case of the crystal ball, it even allows two users to see two different perspectives on the augmented world.
Can’t understand why no-one has commercialized this idea yet. It seems to be far more natural than HMD that blocks your peripheral vision.