基于扫描振镜及数字微镜显示器控制的静态体三维显示系统  

Static Volumetric 3D Display System Based on Scanning Galvanometer and Digital Micromirror Display Control

作　　者：韩东成 杨世植[1,3] 赵强 张亮亮 邓燕 Han Dongcheng;Yang Shizhi;Zhao Qiang;Zhang Liangliang;Deng Yan(Key Laboratory of Atmospheric Optics,Anhui Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Hefei 230031,Anhui,China;Science Island Branch,Graduate School,University of Science and Technology of China,Hefei 230026,Anhui,China;Advanced Laser Technology Laboratory of Anhui Province,Hefei 230037,Anhui,China;School of Environment and Energy Engineering,Anhui Jianzhu University,Hefei 230601,Anhui,China;Anhui Easpeed Technology Co.,Ltd.,Hefei 230088,Anhui,China)

机构地区：[1]中国科学院安徽光学精密机械研究所大气光学重点实验室,安徽合肥230031 [2]中国科技大学研究生院科学岛分院,安徽合肥230026 [3]安徽省先进激光技术实验室,安徽合肥230037 [4]安徽建筑大学环境与能源工程学院,安徽合肥230601 [5]安徽省东超科技有限公司,安徽合肥230088

出　　处：《光学学报》2024年第8期52-62,共11页Acta Optica Sinica

基　　金：国家自然科学基金(11704003);安徽省高校协同创新项目(GXXT-2022-085);安徽省教育厅高校自然科学研究项目(2022AH050233);安徽省重点研究与开发计划(2020b05050006)。

摘　　要：本文介绍了一种波长宽、响应快的静态体三维显示系统,包括显示介质、控制系统及激光系统三部分。实验中,选取具有双频上转换效应的NaYF_(4)∶Er@NaGdF_(4)∶Yb@NaYF_(4)∶Er纳米晶溶液作为显示介质。控制系统选用1024×768的数字微镜显示器(DMD)及扫描振镜对红外激光进行投影,使用成像光学软件将立体图像的二维切片转换为DMD/扫描振镜的控制信号。激光系统选用1550 nm和850 nm的红外激光,用适当的光学元件调整光束和光路。最终在纳米晶的环己烷溶液中(1 mmol/mL)以30×1024×768的分辨率实现了绿色(532 nm)三维图像体的快速扫描,图像无闪烁、深度线索自然、可360°观看。该显示系统对材料性能要求不高,搭建方便,显示效果明显,为上转换材料在三维显示领域的初步研究及大尺寸体三维显示技术的探究提供了参考。Objective The static volumetric 3D display technology displays 3D objects by volume pixels in 3D space,presenting real stereoscopic images.It can provide physiological and psychological depth clues for human visual systems to perceive 3D objects and can meet all-around observation needs.Additionally,it is the most likely 3D display technology to achieve high spatial resolution,multi-angle,and simultaneous observation of multiple people,real-time interaction,and large size.Among them,the static volume 3D display technology based on dual beam addressing has attracted much attention due to its unique advantages such as fine voxel,high spatial resolution,easy realization of full-color display,and meanwhile the image is no shaking and does not require auxiliary equipment(such as glasses)to view.By employing the energy of two infrared photons to pump a material into an excited energy level,the electrons in the excited energy level will transition to a lower energy level and produce visible light,which is an effective way to achieve dual-beam addressing.The material that can implement this luminescence process is also known as the two-step two-frequency(TSTF)up-conversion luminescence(UCL)material,and it can have great potential applications in static volumetric 3D display technology due to its rapid response,high contrast,and high color purity.Despite this,the material has received few reports in volumetric 3D display applications because of its low UCL efficiency and small display volume.Additionally,some literature focuses on the properties of materials,with less introduction of 3D display systems.The above two points greatly limit the application and research interest of the 3D volume display of TSTF UCL materials.Thus,we develop a 3D imaging system based on the TSTF UCL mechanism of rare earth ions,and meanwhile build a projection imaging optical path based on digital optical processing(DLP)and a line laser shaping optical path based on scanning galvanometer and cylindrical mirror.The display system is based on the

关 键 词：体三维显示 双步双频上转换 NaYF4纳米晶 数字微镜显示器 

分 类 号：O436[机械工程—光学工程]