2. Sony direct ToF X Ray
3. Intro on ToF is at https://3d-ai.medium.com/direct-tof-vs-indirect-tof-8ccecb7399fd
Reference https://mp.weixin.qq.com.
Marc. Y. , Tech Leader. Focus on AR and AV and AI (AI-IoT and AI-Sensing). More info at http://4da.tech/ and https://www.linkedin.com/in/ymarc/
