This paper is to describe a color digital holographic projector and this system is comprised of RGB lasers, 3 units of
Digital Micro-Mirror Device (DMD) and high speed rotating diffuser. In this research, we focused on colorings Digital
holograms and synchronized RGB digital holograms versus rotated diffuser. To achieve this phenomenon, three of the
holograms optical path need to be aligned to pass through a same beam splitter and eventually combined as one colored
holograms output While, this colored hologram will be reconstructed on volumetric screen (rotated diffuser) at the
floating manner in free space. To obtain these result 3 key factors is investigated:
1. To configured 1 master and 2 slaves digital micro mirror illumination time
2. To reconstructed holograms orientation angle diffuser versus rotating speed.
3. To synchronize rotating diffuser speed versus DMD frame-rate
Last but not least, the team built a prototype Color Digital Holography Display but more developments are required to
follow up such as, enhance system's reliability, robustness, compactness and 3D realistic images floating in the free air
This paper describes how a Digital Holographic Projector is designed and implemented to project two-dimension virtual images onto the volumetric display media. In this research, we focus on the method to create 3D models, diffractive algorithm and the display media. A 3D model is generated based on the 360° view with views at every 10° interval from a 3D perspective view software. The hologram interference fringes are re-producing from the Fraunhofer algorithm. In order to make more flexible and portable, a Compact Vision System is introduced to storage multiply interference fringes. At the same time, the fringes are sent out at 30 Hz frame by frame continually to the digital micro-mirror1. With the presence of Nd: YVO4 green laser and various optical components, the 3D 360° hologram images are dynamically reconstructed and projected onto the high speed rotating diffuser forming a 3D model at any viewing angle on the volumetric display media. Both volumetric display media, wet and dry methods are demonstrated to show their feasibility and convenience. Finally, the dry volumetric technique with vertical projection mounting is adopted and as the result shown that the speckle noise is significance reduced.