Is it possible with modern optic technologies to achieve the following effect: A relatively thing laser beam passes 30-50 cm and after that completely defocuses? It should defocus under very broad angle. What I exactly mean is creation of a 2D screenless images just in a thin air with help of a lasers. For example a few lasers could beam in viewer's direction from a narrow point. After their beams pass few tens of inches they completely defocus and create a picture. Is such a thing possible?