Hybrid display of static image and aerial image by use of transparent acrylic cubes and retro-reflectors

Shogo Morita; Shusei Ito; Hirotsugu Yamamoto

doi:10.1117/12.2251847

16 February 2017 Hybrid display of static image and aerial image by use of transparent acrylic cubes and retro-reflectors

Shogo Morita, Shusei Ito, Hirotsugu Yamamoto

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Proceedings Volume 10126, Advances in Display Technologies VII; 101260P (2017) https://doi.org/10.1117/12.2251847
Event: SPIE OPTO, 2017, San Francisco, California, United States

Abstract

Aerial display can form transparent floating screen in the mid-air and expected to provide aerial floating signage. We have proposed aerial imaging by retro-reflection (AIRR) to form a large aerial LED screen. However, luminance of aerial image is not sufficiently high so as to be used for signage under broad daylight. The purpose of this paper is to propose a novel aerial display scheme that features hybrid display of two different types of images. Under daylight, signs made of cubes are visible. At night, or under dark lighting situation, aerial LED signs become visible. Our proposed hybrid display is composed of an LED sign, a beam splitter, retro-reflectors, and transparent acrylic cubes. Aerial LED sign is formed with AIRR. Furthermore, we place transparent acrylic cubes on the beam splitter. Light from the LED sign enters transparent acrylic cubes, reflects twice in the transparent acrylic cubes, exit and converge to planesymmetrical position with light source regarding the cube array. Thus, transparent acrylic cubes also form the real image of the source LED sign. Now, we form a sign with the transparent acrylic cubes so that this cube-based sign is apparent under daylight. We have developed a proto-type display by use of 1-cm transparent cubes and retro-reflective sheeting and successfully confirmed aerial image forming with AIRR and transparent cubes as well as cube-based sign under daylight.

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Shogo Morita, Shusei Ito, and Hirotsugu Yamamoto "Hybrid display of static image and aerial image by use of transparent acrylic cubes and retro-reflectors", Proc. SPIE 10126, Advances in Display Technologies VII, 101260P (16 February 2017); https://doi.org/10.1117/12.2251847

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KEYWORDS

Light sources

Airborne remote sensing

Beam splitters

Retroreflectors

Light emitting diodes

Light sources and illumination

Light

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