Augmented reality 3D display system based on holographic optical element

摘要

Augmented reality (AR) technology is a hot topic research field in recent years. It combines the real world scene andvirtual 2D or 3D images. We propose two AR 3D display systems based on integral imaging (II) by using a micro-lensarray holographic optical elements (HOE). In the first AR display system, we realize a dual-view-zone 3D display basedon angle multiplexing technology. In recording process, two parallel beams with different incident angles illuminate amicro lens array (MLA) to form two sets of inclined spherical wave arrays, and another parallel beam illuminates theopposite side of the photopolymer. After exposure, the MLA-HOE is fabricated. In reconstruction process, only theBragg matched light can be diffracted, while the Bragg mismatch light transmits through the HOE directly. Thus, when aprojector beam satisfies the Bragg match condition, two inclined spherical wave arrays with the different diffractiondirections will be rebuilt to realize the dual-view-zone AR 3D display. In the second AR display system, we improve theresolution of the AR 3D display by using a lenticular lens array HOE. In this system, we use a divergent light as thereference beam to simplify the display system and enlarge the display size of the HOE. The AR 3D display system hasenhanced resolution and is compact.