Based on previous prototype of the Real time 3D holographic display developed last year, we developed a new concept of auto-stereoscopic multiview display (64 views), wide angle (90°) 3D full color display. The display is based on a RGB laser light source illuminating a DMD (Discovery 4100 0,7”) at 24.000 fps, an image deflection system made with an AOD (Acoustic Optic Deflector) driven by a piezo-electric transducer generating a variable standing acoustic wave on the crystal that acts as a phase grating. The DMD projects in fast sequence 64 point of view of the image on the crystal cube. Depending on the frequency of the standing wave, the input picture sent by the DMD is deflected in different angle of view. An holographic screen at a proper distance diffuse the rays in vertical direction (60°) and horizontally select (1°) only the rays directed to the observer. A telescope optical system will enlarge the image to the right dimension. A VHDL firmware to render in real-time (16 ms) 64 views (16 bit 4:2:2) of a CAD model (obj, dxf or 3Ds) and depth-map encoded video images was developed into the resident Virtex5 FPGA of the Discovery 4100 SDK, thus eliminating the needs of image transfer and high speed links
In this article is described a Real Time 3D video display of holographic images based on the principle of sequential
scanning of holograms with HPO (horizontal parallax only) generated by a high speed computer and sent at high frame
rate to DMD, and visualized by an anamorphic optical group. The device displays binary amplitude and phase modulated
images opportunely synchronized and scanned by a galvanometric mirror or polygonal mirror driven by the control
electronic circuitry. The elementary holograms are generated by a resident hardware which, through interpolation,
generates single elementary holograms starting from images and depth map. The device operates with incoherent light
(integral images) or with coherent light (holographic display) by changing the optical visualization group.