2023 Fiscal Year Final Research Report
Free-space volumetric display using laser-excited light scattering voxels in air
| Project/Area Number |
21K17777
|
|---|
| Research Category |
Grant-in-Aid for Early-Career Scientists
|
| Allocation Type | Multi-year Fund |
|---|
| Review Section |
Basic Section 61020:Human interface and interaction-related
|
|---|
| Research Institution | Utsunomiya 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
|
| Keywords | ボリュメトリックディスプレイ |
|---|
| 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.
|
| Free Research Field |
ヒューマンインタフェースおよびインタラクション関連
|
| 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．
|
