A LiDAR (Light Detection and Ranging) sensor in smartphones works by using laser pulses to measure distances and create depth maps of the surroundings. It enhances augmented reality (AR), photography, and object detection. Here’s how it works:
How LiDAR Works in Smartphones:
- Laser Emission
- The LiDAR sensor emits invisible infrared laser pulses into the environment.
- Time-of-Flight (ToF) Measurement
- The sensor calculates the time it takes for the laser pulses to hit an object and return to the sensor.
- This is known as the Time-of-Flight (ToF) principle.
- Depth Map Creation
- By measuring distances across multiple points, the LiDAR sensor generates a 3D depth map of the scene.
- This map helps the smartphone understand the shape, size, and position of objects in real-time.
Applications of LiDAR in Smartphones:
✅ Augmented Reality (AR)
- Enhances AR apps by providing accurate depth sensing for realistic object placement and interaction.
- Used in Apple’s ARKit for improved AR gaming, home design, and virtual shopping.
✅ Photography & Night Mode Focus
- Improves autofocus in low-light conditions, leading to sharper photos.
- Enhances portrait mode by accurately separating the subject from the background.
✅ 3D Scanning & Object Measurement
- Can scan real-world objects and spaces to create 3D models.
- Used in apps like Measure (iOS) to accurately measure distances and objects.
✅ Gesture & Motion Recognition
- Can detect hand gestures for touchless controls and gaming.
- Helps in accessibility features for people with disabilities.
Which Smartphones Have LiDAR?
Apple introduced LiDAR in:
📱 iPad Pro (2020 & later)
📱 iPhone 12 Pro, 13 Pro, 14 Pro, 15 Pro & Pro Max models
Some Android smartphones use ToF sensors for depth sensing, but full-fledged LiDAR is still rare outside Apple devices.