In 2020, apple (AAPL) released a new iPad pro, in which lidar based on dtof technology is the highlight of this tablet computer, which has aroused heated discussion in and outside the 3D imaging and sensing industry. Previously, mcmus consulting has published articles such as, to uncover the mystery of this lidar. This paper is written by Feixin technology, and interprets the principle of dtof sensing technology.
Disassemble Apple’s new iPad pro to obtain the rear camera module. On the right side is Apple’s new iPad Pro lidar
First of all, let’s review Apple’s official announcement: “a special lidar scanner uses direct time of flight (dtof) technology to measure the light reflected from the farthest five meters in indoor or outdoor environment. It can detect from the photon level and run at nanosecond speed, opening up endless possibilities for augmented reality (AR) and a wider range of 3D sensing applications.
The viewing angle of the lidar on Apple’s new iPad Pro is about 60 ° X 48 °. In order to ensure a certain detection distance, apple uses DOE (diffractive optical element) to realize infrared laser lattice emission, and each point covers an angle range of about 1 °× 1 °.