1 March 2013 Aerial LED signage by use of crossed-mirror array
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Proceedings Volume 8643, Advances in Display Technologies III; 864302 (2013) https://doi.org/10.1117/12.2005733
Event: SPIE OPTO, 2013, San Francisco, California, United States
Abstract
3D representation of digital signage improves its significance and rapid notification of important points. Real 3D display techniques such as volumetric 3D displays are effective for use of 3D for public signs because it provides not only binocular disparity but also motion parallax and other cues, which will give 3D impression even people with abnormal binocular vision. Our goal is to realize aerial 3D LED signs. We have specially designed and fabricated a reflective optical device to form an aerial image of LEDs with a wide field angle. The developed reflective optical device composed of crossed-mirror array (CMA). CMA contains dihedral corner reflectors at each aperture. After double reflection, light rays emitted from an LED will converge into the corresponding image point. The depth between LED lamps is represented in the same depth in the floating 3D image. Floating image of LEDs was formed in wide range of incident angle with a peak reflectance at 35 deg. The image size of focused beam (point spread function) agreed to the apparent aperture size.
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Hirotsugu Yamamoto, Hirotsugu Yamamoto, Ryousuke Kujime, Ryousuke Kujime, Hiroki Bando, Hiroki Bando, Shiro Suyama, Shiro Suyama, } "Aerial LED signage by use of crossed-mirror array", Proc. SPIE 8643, Advances in Display Technologies III, 864302 (1 March 2013); doi: 10.1117/12.2005733; https://doi.org/10.1117/12.2005733
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