A 0.3mm-Resolution Time-of-Flight CMOS Range Imager with Column-Gating Clock-Skew Calibration

📋 论文概要

本文提出了一种采用列选通时钟偏斜校准技术的CMOS飞行时间（ToF）距离成像仪，实现了0.3毫米的高距离分辨率，解决了传统光截面法需要长基线和机械扫描的局限性，为小型化3D扫描提供了新方案。

💡 主要创新点

• 提出了列选通时钟偏斜校准技术，有效补偿像素阵列中的时钟偏差，提升ToF测距精度。
• 实现了0.3毫米级的高分辨率CMOS ToF成像仪，显著优于先前几厘米的分辨率水平。
• 可能采用了新型像素结构或读出电路优化，以支持高速高精度距离测量。

🏷 关键词

📄 原文摘要

combination with 3D printers. One of the common technologies in contactless 3D scanners is the light-section method, which has advantages in term of accuracy. The method, however, requires a long base line between a camera and light source to achieve high resolution and a mechanical scanning system. A high range resolution Time-of-Flight (ToF) imager provides new possibilities of implementing a miniature head, which allows flexible scanning of an object with a complicated structure. The range resolution of reported CMOS ToF imagers [1-3] is limited to a few centimeters. For higher resolution, higher modulation frequency is required. However, the modulation frequency used for CMOS ToF imagers is limited to several tens of MHz. This paper presents a ToF imager with 0.3mm range resolution, which

👥 作者与机构

Keita Yasutomi, Takahiro Usui, Sang-Man Han, Taishi Takasawa,

Keiichiro Kagawa, Shoji Kawahito Shizuoka University, Hamamatsu, Japan Recently, 3D scanning systems have attracted rapidly rising attention in