Optoelectronic sensors

Optoelectronic sensors are devices that use light (within a certain spectrum) to detect objects and thus trigger control, switching and regulating functions.

Electrical impulses are converted into light pulses by the optical sensor’s transmitter, and these are then converted back into electrical signals by the receiver. The amplifier circuit with a subsequent comparator evaluates and compares the resulting signal against a predefined switching threshold. The switching function of the output stage is triggered depending on whether the light beam reaches the receiver or not. Optosensors enable precise positioning and very long ranges, regardless of the material of the object being detected.

The wide range of optoelectronic sensors for standard and special applications in all areas of automation technology covers all common designs, such as compact, cylindrical, and miniature versions. One-way, retroreflective, or push-button functions with infrared, red light, or laser light sources are available. In addition, there are special application sensors, for example, for distance measurement or color recognition.

A detailed explanation of the different operating principles can be found in the PDF “Operating Principles” at the end of the page in the download area.