Holobricks: modular coarse integral holographic displays

Abstract

Here, we propose and demonstrate a modular holographic display system that allows seamless spatial tiling of multiple coarse integral holographic (CIH) displays called “holobricks”. A holobrick is a self-contained CIH module enclosing a spatial light modulator (SLM), a scanner, and periscopic coarse integral optics. Modular CIH uses a coarse pitch and small area but high-bandwidth SLM in conjunction with periscopic coarse integral optics to form the angularly tiled 3D holograms with large viewing areas and fields of view. The creation of periscopic coarse integral optics prevents the optical system from being larger than the holographic image and allows the holographic fringe pattern to fill the entire face of the holobrick. Thus, multiple holobricks can be seamlessly abutted to form a scalable spatially tiled holographic image display capable of both wide field-of-view angle and arbitrary large-size area. We demonstrate an initial prototype that seamlessly tiles two holobricks each with 1024 × 768 pixels, 40° FOV, full color, 24 fps, displaying 2D, 3D holographic stereograms, and full parallax 3D CGI Fresnel holograms.

An efficient real-time target tracking algorithm using adaptive feature fusion

“…The proposed method can better solve the problem of target occlusion and scale variation, meeting the requirements of real-time performance and high accuracy. This work has also a potential application to extend the field of 3D holographic video systems [44].…”

Tunable liquid crystal grating based holographic 3D display system with wide viewing angle and large size

“…Compared with 2D display, 3D display can present more information, which greatly enhances the interactivity and selectivity of information 1 , 2 . Holography records and reconstructs the complete wavefront information of the object according to the principles of interference and diffraction 3 , 4 . Its appearance has promoted the vigorous development of many technologies, such as 3D display, data storage 5 , 6 , optical encryption 7 , 8 , medical imaging 9 , 10 and digital microscopy 11 , 12 .…”

Towards a modular and scalable holographic display

“…In a recent paper published by Jin Li, Quinn Smithwick, and Daping Chu 13 , the authors are taking the approach of making a modular holographic display that can eventually be scaled up by adding more and more elements. Dubbed the “Holobricks,” a single element of the display has a limited filed of view by itself, but it can be extended by stacking additional elements side by side (Figure 1 of ref.…”

“…Dubbed the “Holobricks,” a single element of the display has a limited filed of view by itself, but it can be extended by stacking additional elements side by side (Figure 1 of ref. 13 ). At the heart of this display is the Texas Instruments DMD, which has an image refresh rate higher than commercially available liquid crystal micropanels.…”

“…A combination of pre-compensation calibration method for the hardware and correcting the reminding error during the computation of the hologram was used to obtain a good display quality (Figure 5 of ref. 13 ).…”