16 February 2017 Augmented reality 3D display using head-mounted projectors and transparent retro-reflective screen
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Proceedings Volume 10126, Advances in Display Technologies VII; 101260E (2017) https://doi.org/10.1117/12.2252439
Event: SPIE OPTO, 2017, San Francisco, California, United States
Abstract
A 3D augmented reality display is proposed that can provide glass-free stereo parallax using a highly transparent projection screen. The proposed display is based on a transparent retro-reflective screen and a pair of laser pico projectors placed close to the viewer’s head. The retro-reflective screen directs incident light towards its source with little scattering so that each of the viewer’s eyes only perceives the content projected by the associated projector. Each projector displays one of the two components (left or right channel) of stereo content. The retro-reflective nature of screen provides high brightness compared to the regular diffused screens. The partially patterned retro-reflective material on clear substrate introduces optical transparency and facilitates the viewer to see the real-world scene on the other side of screen. The working principle and design of the proposed see-through 3D display are presented. A tabletop prototype consisting of an in-house fabricated 60×40cm2 see-through retro-reflective screen and a pair of 30 lumen pico-projectors with custom 3D printed housings is demonstrated. Geometric calibration between projectors and optimal viewing conditions (eye box size, eye-to-projector distance) are discussed. The display performance is evaluated by measuring the brightness and crosstalk for each eye. The screen provides high brightness (up to 300 cd/m2 per eye) using 30 lumens mobile projectors while maintaining the 75% screen transparency. The crosstalk between left and right views is measured as <10% at the optimum distance of 125-175 cm, which is within acceptable range.
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Shoaib R. Soomro, Shoaib R. Soomro, Hakan Urey, Hakan Urey, } "Augmented reality 3D display using head-mounted projectors and transparent retro-reflective screen", Proc. SPIE 10126, Advances in Display Technologies VII, 101260E (16 February 2017); doi: 10.1117/12.2252439; https://doi.org/10.1117/12.2252439
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