基于metasurface和PCSEL的结构光用于单眼深度感知和面部识别
Wen-Cheng Hsu1,2, Chia-Hsun Chang1, Yu-Heng Hong2
1Department of Photonics, College of Electrical and Computer Engineering, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan.
Nano letters
|January 10, 2024
概括
这项研究引入了一种新的超表面和光子晶体表面发射激光 (PCSEL) 系统,用于高效的单眼深度传感和面部识别. 紧的,没有镜头的设计为可穿戴设备提供了卓越的性能和更低的功耗.
科学领域:
- 光学和光子学 在光学和光子学.
- 计算机视觉 计算机视觉
- 材料科学 材料科学 材料科学
背景情况:
- 结构光 (SL) 深度传感系统传统上使用衍射光学元件 (DOE) 和聚合器,导致重和耗电的设备.
- 现有的系统面临着点投影密度,尺寸和功率效率的局限性,阻碍了将其集成到可穿戴设备等紧应用中.
研究的目的:
- 开发一种新的,紧的,节能的深度传感系统,用于使用超表面和PCSEL进行面部识别.
- 克服传统SL深度传感技术的局限性.
主要方法:
- 使用基于GaAs的超表面和光子晶体表面发射激光器 (PCSEL) 进行红外点投射.
- 设计了一个没有镜头的轻量级光学架构.
- 测量了系统的视野 (FOV) 和点采样角度.
主要成果:
- 从297μm的超表面投射了大约45,700个红外点,显著超过了基于DOE的投影仪.
- 获得了158°的宽FOV和0.611°的点采样角度.
- 与垂直腔表面发射激光 (VCSEL) 阵列相比,其功耗低5至10倍.
结论:
- 开发的系统为SL深度传感提供了一种革命性的方法,可以实现高效的面部识别.
- 紧的尺寸,没有镜头的设计和低功耗使其非常适合集成到可穿戴设备中.
- 这一创新为在消费电子产品中广泛采用先进的深度传感技术铺平了道路.
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