laser-dat

Lasers are widely used in sensors to measure the shape, distance, or surface profile of an object.

🔍 How Laser Works as a Sensor

Lasers can be used in sensors through the following key principles:

Method	Principle	What It Measures
Laser triangulation	Measures angle of reflected beam from an object	Distance, surface profile
Time-of-flight (ToF)	Measures time light takes to reflect back	Distance (even long-range)
Laser scanning	Sweeps a laser across an object and records distances	Shape, surface contour, 3D modeling
Laser interferometry	Measures phase change of reflected laser light	Ultra-high precision displacement

激光的发射原理及产生过程的特殊性决定了激光具有普通光所不具有的特点：即三好（单色性好、相干性好、方向性好）一高（亮度高）。