PortOn is a portable optical system that can form mid-air images that stand on a glossy surface such as a table or the floor. Porton projects light to form a mid-air image at a position that is easy for a human to see when it is placed on a flat surface. Our contribution is a practical optical design that can be easily installed. We designed the arrangement of optical elements to form a mid-air image by placing it on a flat and glossy surface. We also developed a method to erase unnecessary light by adding optical films to the system. With this method, it is possible to display computer graphics in the real world easily and realize mixed reality interaction.



  • Naoya Koizumi, Sano Ayaka. Optical System to Display Mid-Air Images on a Glossy Plane and Remove Ground Images. Optics Express, Vol. 28, Issue 18, pp. 26750--26763, 2020
  • Ayaka Sano and Naoya Koizumi. 2019. PortOn: Portable mid-air imaging optical system on glossy materials . In Proceedings of SA ’19 Emerging Technologies. ACM, New York, NY, USA, 2 pages. https://doi.org/10.1145/ 3355049.3360527
  • Ayaka Sano and Naoya Koizumi. 2019. Portable Mid-air Imaging Optical System on Glossy Surface. In 25th ACM Symposium on Virtual Reality Software and Technology (VRST ’19), November 12–15, 2019, Parramatta, NSW, Australia. ACM, New York, NY, USA, 5 pages. https://doi.org/10.1145/3359996. 3364255 【Best Short Paper - Runner Up】
  • 佐野 文香, 小泉 直也. Porton: 光沢のある水平面上に直立空中像を表示する持ち運び可能な光学系の設計. 情報処理学会 インタラクション2019, インタラクション2019 論文集, pp.940 - 944, 2019.3.8 ( PDF )


  • 2019年度グッドデザイン賞
  • インタラクション 2019 インタラクティブ発表賞(一般投票)
  • インタラクション 2019 インタラクティブ発表賞(PC推薦)



  1. 光沢平面上に直立空中像、裸眼で視認 電通大「PortOn」開発. ITmedia. 2020.03.12.