2019 年 24 巻 1 号 p. 113-123
In this paper, we propose an optical system called Deco-Wall that can form mid-air images in front of building walls. This is achieved by installing optical components overhead. It displays a vertical mid-air image that is easily visible in front of the viewer. Our contributions are formulating its field of view, measuring the luminance of mid-air images formed with our system by using a luminance meter, measuring the resolution of the mid-air images by MTF, and selection of suitable materials for our system. We prototyped two applications for proof of concept and observed user reactions to evaluate our system.