In this study, we propose Floagent, as a human-computer interaction system that displays images in mid-air using infrared light reflected by a hot mirror. Floagent is an interaction system that allows users to focus on a mid-air image without being aware of sensors. By combining a hot mirror and a retroreflective transmissive optical element, Floagent conceals the camera from the user without affecting the mid-air image. To evaluate the proposed system, we investigated the accuracy of touch input interactions with mid-air images. The results show that the proposed system was able to measure user input well. Floagent enables an interaction design with a hidden sensor in which mid-air images appear to respond spontaneously to a wide variety of interaction events.



  1. Shohei Ando and Naoya Koizumi. 2022. Floagent: Interaction with Mid-Air Image via Hidden Sensors. In SIGGRAPH Asia 2022 Emerging Technologies (SA '22 Emerging Technologies). Association for Computing Machinery, New York, NY, USA, Article 4, 1–2.
    DOI: https://doi.org/10.1145/3550471.3558398
  2. 安藤将平,小泉直也.ホットミラーによる赤外光反射を用いた空中像インタラクション手法の提案.第64回EC・第198回HCI合同研究発表会, 2022.06.16.(PDF)