https://techcrunch.com/2020/10/13/snapchat-among-first-to-leverage-iphone-12-pros-lidar-scanner-for-ar/

Apple introduced its latest flagship iPhone models, the iPhone 12 Pro and 12 Pro Max, at its iPhone event on Tuesday. Among other things, the devices sport a new LiDAR Scanner designed to allow for more immersive augmented reality (AR) experiences. Snapchat today confirms it will be among the first to put the new technology to use in its iOS app for a LiDAR-powered Lens.

As Apple explained during the event, the LiDAR (Light Detection And Ranging) Scanner measures how long it takes for light to reach an object and reflect back.