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Free-space volumetric display using laser-excited light scattering voxels in air

Research Project

Project/Area Number 21K17777
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 61020:Human interface and interaction-related
Research InstitutionUtsunomiya University

Principal Investigator

Kumagai Kota  宇都宮大学, オプティクス教育研究センター, 助教 (90879628)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2023: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2022: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2021: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Keywordsボリュメトリックディスプレイ / フェムト秒レーザー / 計算機ホログラム
Outline of Research at the Start

AI技術の躍進により,知能を得た機械との対話が現実のものとなるなかで,それを視覚化するための映像によるヒューマンインターフェースは,情報提示がいまだ2次元平面に拘束されており,物体と映像との間に大きなギャップが存在する.一方で,ボリュメトリックディスプレイは,体積的画素(ボクセル)を用いて実空間中に直接3D映像を表示できるため,このギャップを埋める技術として注目されている.本研究では,フェムト秒レーザー励起空中散乱ボクセルの実証と,体積映像描画への適用に関する研究を遂行する.本研究の遂行により,色表現可能な自由空間ボリュメトリックディスプレイの実現を目指す.

Outline of Final Research Achievements

We evaluated the light scattering characteristics of femtosecond laser-excited voxels generated in air for the realization of free-space full-color volumetric display. Through the investigation of light sources for excitation and colorization of voxels in air, we constructed an optical system that enables simultaneous observation of the spectrum, color, and shape of a voxel obtained by focused irradiation of a 515-nm femtosecond laser. From these evaluations, we found that the voxel color depends on the polarization state and wavelength of the incident light, indicating that laser-excited aerial voxels, which have been used as light-emission voxels, can be used as light-scattering voxels. Furthermore, we extended the system to a double-pulse optical system in which the excitation pulse and the coloring pulse can be given arbitrary time differences, and investigated the enhancement of the light scattering intensity of a voxel.

Academic Significance and Societal Importance of the Research Achievements

レーザー励起によるボリュメトリックディスプレイは,ボクセルを空気中に直接生成することで,本来物体が有する体積的な3D情報を映像として提示できる技術である.しかし,ボクセルの色は,材料(空気)に依存するため,青白色のみの表現に留まっていた.本研究では,これまでボクセルとしてその自発光のみ利用されてきたレーザー励起空中ボクセルの散乱光を評価し,色表現可能な光散乱型ボクセルとしての有用性を示した.

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (25 results)

All 2024 2023 2022 2021 Other

All Presentation (24 results) (of which Int'l Joint Research: 12 results,  Invited: 10 results) Remarks (1 results)

  • [Presentation] Volumetric Display with Dual-Path Holographic Laser Rendering2024

    • Author(s)
      Kota Kumagai, Hisashi Oka, Kazuki Horikiri, Tetsuji Suzuki, Yoshio Hayasaki
    • Organizer
      ACM SIGGRAPH 2024 Emerging Technologies
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] レーザー描画による体積的光源生成の応用2023

    • Author(s)
      熊谷幸汰,早崎芳夫
    • Organizer
      日本学術会議公開シンポジウム「光がもたらす未来社会」
    • Related Report
      2023 Annual Research Report
  • [Presentation] レーザー励起による光散乱型ボクセルの生成と体積映像描画への適用2023

    • Author(s)
      熊谷幸汰,沼澤 啓亮,早崎芳夫
    • Organizer
      情報フォトニクス研究討論会2023
    • Related Report
      2023 Annual Research Report
  • [Presentation] フェムト秒レーザー励起光散乱型ボクセルを用いたボリュメトリックディスプレイ2023

    • Author(s)
      熊谷幸汰,早崎芳夫
    • Organizer
      第84回応用物理学会秋季学術講演会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] 水膜を用いた空間選択的広帯域光源生成と計算イメージングへの応用2023

    • Author(s)
      熊谷幸汰,黄心慧,畑中耕治,早崎芳夫
    • Organizer
      Optics & Photonics Japan 2023 (OPJ2023)
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] Computational imaging with laser-generated light sources2023

    • Author(s)
      Kota Kumagai, Hsin-hui Huang, Koji Hatanaka, and Yoshio Hayasaki
    • Organizer
      International Workshop on Optics, Biology, and Related Technologies (IWOB2023)
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Holographic laser-driven light sources for computational imaging2023

    • Author(s)
      Kota Kumagai, Hsin-hui Huang, Koji Hatanaka, and Yoshio Hayasaki
    • Organizer
      SPIE/COS Photonics Asia
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Femtosecond-laser-driven structured illumination for computational broadband imaging2023

    • Author(s)
      Kota Kumagai, Hsin-hui Huang, Koji Hatanaka, and Yoshio Hayasaki
    • Organizer
      Information Photonics (IP2023)
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Femtosecond-laser-excited micro-clouds voxel for volumetric display2023

    • Author(s)
      Keisuke Numazawa, Kota Kumagai, and Yoshio Hayasaki
    • Organizer
      Laser Display and Lighting Conference 2023 (LDC2023) in OPTICS & PHOTONICS International Congress 2023 (OPIC2023)
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Aerial volumetric display with 10 kHz femtosecond laser excitations2022

    • Author(s)
      Tatsuki Mori, Kota Kumagai and Yoshio Hayasaki
    • Organizer
      Information Photonics 2022 (IP2022)
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Colored voxels of laser-excited aerial volumetric display2022

    • Author(s)
      Kota Kumagai and Yoshio Hayasaki
    • Organizer
      Digital Holography and Three-Dimensional Imaging 2022 (DH2022)
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Centimeter-sized volumetric display with femtosecond laser excitations to various gas2022

    • Author(s)
      Tatsuki Mori, Kota Kumagai and Yoshio Hayasaki
    • Organizer
      The 22nd International Meeting on Information Display (IMID2022)
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Color volumetric display with laser-driven aerial voxels2022

    • Author(s)
      Kota Kumagai and Yoshio Hayasaki
    • Organizer
      The 22nd International Meeting on Information Display (IMID2022)
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Volumetric display with holographic-femtosecond laser drawing2022

    • Author(s)
      Yoshio Hayasaki, Tasuki Mori, Kota Kumagai
    • Organizer
      25th Congress of the International Commission for Optics (ICO)
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Aerial Volumetric Display with Femtosecond-Laser-Driven Colored Voxels2022

    • Author(s)
      Kota Kumagai and Yoshio Hayasaki
    • Organizer
      29th International Display Workshops (IDW '22)
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] レーザー励起空中ボリュメトリックディスプレイにおける画素の色表示2022

    • Author(s)
      熊谷幸汰,早崎芳夫
    • Organizer
      第16回新画像システム・情報フォトニクス研究討論会
    • Related Report
      2022 Research-status Report
  • [Presentation] フェムト秒レーザーと液晶空間光変調素子を用いた体積映像表示2022

    • Author(s)
      熊谷幸汰,早崎芳夫
    • Organizer
      立体メディア技術研究会(3DMT)
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] 霧箱を用いたフェムト秒レーザー励起体積的ディスプレイ2022

    • Author(s)
      沼澤啓亮,熊谷幸汰,森建基,早崎芳夫
    • Organizer
      Optics & Photonics Japan 2022 (OPJ2022)
    • Related Report
      2022 Research-status Report
  • [Presentation] 気体型励起体積ディスプレイの発光特性の評価2022

    • Author(s)
      森建基,熊谷幸汰,早崎芳夫
    • Organizer
      Optics & Photonics Japan 2022 (OPJ2022)
    • Related Report
      2022 Research-status Report
  • [Presentation] マイクロ雲をボクセルとする体積的ディスプレイの検討2022

    • Author(s)
      沼澤 啓亮,熊谷幸汰,早崎芳夫
    • Organizer
      第70回応用物理学会春季学術講演会
    • Related Report
      2022 Research-status Report
  • [Presentation] 自由空間カラーボリュメトリックディスプレイに向けたフェムト秒レーザー励起空中ボクセルの散乱光評価2022

    • Author(s)
      熊谷幸汰,早崎芳夫
    • Organizer
      第70回応用物理学会春季学術講演会
    • Related Report
      2022 Research-status Report
  • [Presentation] Aerial volumetric display with femtosecond laser excitations2022

    • Author(s)
      Kota Kumagai
    • Organizer
      The 2nd International Workshop on Optics, Biology, and Related Tecnologies (IWOB2022)
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] レーザー励起空中体積ディスプレイの大画面化と画素数増加2022

    • Author(s)
      森建基, 熊谷幸汰, 早崎芳夫
    • Organizer
      第16回関東学生研究論文講演会
    • Related Report
      2021 Research-status Report
  • [Presentation] 実空間体積映像の実現に向けて2021

    • Author(s)
      熊谷幸汰
    • Organizer
      第8回板橋オプトフォーラム, 第3回UU-COREセミナー基礎講座
    • Related Report
      2021 Research-status Report
    • Invited
  • [Remarks] Kota Kumagai web

    • URL

      https://kotakumagai.uu-core.com/

    • Related Report
      2021 Research-status Report

URL: 

Published: 2021-04-28   Modified: 2025-01-30  

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