The difference between laser sensor and photoelectric sensor

Photoelectric sensors achieve control by converting changes in light intensity into changes in electrical signals. The laser sensor first aligns the laser emitting diode with the target and emits laser pulses. After being reflected by the target, the laser scatters in all directions. Part of the scattered light returns to the sensor receiver, and after being received by the optical system, it is imaged onto the avalanche photodiode and converted into the corresponding electrical signal.

2. Light source
The light source of photoelectric sensors can see red and infrared light, but laser sensors use laser technology for measurement. The difference here is that the spot size of red and infrared light is large and increases with distance, which is not conducive to detecting small objects. The light source of a laser sensor is a laser, and the light source will change size with distance. The difference between laser and ordinary light is that the spot size of a laser is very small, and it will also expand with distance, but it is a subtle change that cannot be seen by the naked eye. Therefore, people usually say that the light source of a laser does not expand.

3. Laser sensors are mainly used for object detection, positioning, counting, concave convex, positive and negative functions, and are widely used in industries such as packaging and electronics. Optoelectronic sensors are used in various fields such as crop position detection, liquid level control, product counting, width discrimination, speed detection, fixed length cutting, hole recognition, signal delay, automatic door sensing, color code detection, punching and shearing machines, and safety protection. In addition, by utilizing the concealment of infrared radiation, it can also be used for anti-theft surveillance in banks, warehouses, shops, offices, and other necessary places.

4. Cost laser sensors are also a type of photoelectric sensor, as the manufacturing cost varies depending on the light source. Therefore, laser sensors and photoelectric sensors are distinguished.