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Method to Form Uniform Aerial Thermal Image

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Abstract

Three-dimensional aerial display can be realized by use of lens array [1] and reflective optical elements [2, 3]. Aerial display of light and heat using crossed-mirror array (CMA) and double-layered arrays of rectangular mirrors (WARM) has been proposed [4, 5]. These reflective optical elements form a thermal aerial image by converging infra-red ray. After double reflections, the incident rays are con-verged into the image position because reflection surfaces are placed perpendicularly. Shape of thermal image is same of heat source. However, the intensity of the converged radiation varies depending on the distance between the WARM and the heat source. Therefore, when forming a large-size aerial thermal image, the temperature distribution of the formed aerial thermal image is not uniform.

© 2017 Japan Society of Applied Physics, Optical Society of America

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