3D Sensing: Behind OLED 3D Imaging By trinamiX
trinamiX captures not only a 2D picture and a 3D depth map of the face, but also checks for “live skin” to recognize liveness in real-time. Spoofing the unlock system…
3D Sensing: Lumentum M&A and Market Update
Lumentum made a strategic move to acquire Coherent Lumentum made a strategic move to acquire Coherent in a cash-and-stock deal valued at USD5.7B. This helps Lumentum to fight against II-VI,…
AR: Apple AR Plan
(Image credit: idropnews/Martin Hajek) Apple’s first crack at a headset is allegedly designed to be a pricey, niche precursor to a more ambitious augmented reality product that will take longer…
3D Sensing: VCSEL Laser Illumination
1. VCSEL Overview Vertical Cavity Surface Emitting Lasers (VCSELs) are semiconductor-based devices that emit light perpendicular to the chip surface, as shown in Figure 1. A MEMS tunable VCSEL is shown…
LiDAR: FMCW vs. ToF
This article compares Frequency Modulated Continuous Wave (FMCW) and Time of Flight (ToF) for LiDAR. In summary, FMCW is better in longer term but ToF is still better now. What…
LiDAR: Apple LiDAR Analysis
Figure 1. Apple’s promotion of DTOF This article tries to analyze Apple’s LiDAR sensor and the technologies behind it. This article discusses the following: dToF principle, receiver (RX), illumination (TX),…
ToF: Direct ToF vs. Indirect ToF
3D sensing iToF vs. dToF dToF 2. iToF iToF Modulation 3. iToF vs. dToF performance 4. Applications Related reading Apple Lidar https://3da.medium.com/lidar-apple-lidar-and-dtof-analysis-cc18056ec41a Reference https://zhuanlan.zhihu.com/p/135836088http://www.f4news.com/2018/07/07/ams-presentation-on-3d-sensing-for-consumer-applications/