A projection apparatus projects holographic images. The projection apparatus includes, within a housing, a laser projection system that outputs a laser beam, a diffuser to diffuse the laser beam projected by the laser projection system, a beam diverter/splitter that polarizes the received beam after it has been diffused by the diffuser, and a concave mirror onto which the beam is diverted and which reflects the images to the floating display position that is outside the housing. The apparatus may further include an adjustable lens to adjust the focus and/or size of images that are reflected from the concave mirror. Multiple projection apparatuses may be mounted around the floating display position to synchronously project the holographic images. A conical mirror may be used with the projection apparatus or with multiple projection apparatuses to display the images at a position above the conical mirror.