Patent ID: 7806533

Claim:
An optical system comprising: (a) a first image capture device for capturing an image of an observation area, (b) a first display device, (c) a semi-reflecting plate, (d) a concave mirror disposed facing said first display device, (e) a second display device for displaying a background image, a light beam being scattered by said first display device through said semi-reflecting plate and then reflected by said concave mirror and said semi-reflecting plate in order to display an aerial image between said semi-reflecting plate and said observation area, (f) a projector adapted to project a light beam toward one of said first display device and second display device, said first image capture device being adapted to capture an image of said observation area through said one display device, and (g) means for alternating capture of said image of said observation area by said first image capture device and projection of the light beam projected by said projector.