The photoelectric sensor realizes control by converting changes in light intensity into changes in electrical signals.

In general, the photoelectric sensor is composed of three parts, which are divided into: transmitter, receiver and detection circuit.
The transmitter is aimed at the target to emit a light beam, and the emitted light beam generally comes from a semiconductor light source, a light emitting diode (LED), a laser diode, and an infrared emitting diode. The beam is emitted uninterrupted, or the pulse width is changed. The photoelectric sensor manufacturer tells you that the receiver consists of a photodiode, a phototransistor, and a photocell. In front of the receiver, optical components such as lens and aperture are installed. Behind it is the detection circuit, which can filter out the effective signal and apply the signal.
In addition, there are emission plates and optical fibers in the structural elements of the photoelectric switch.
The photoelectric sensor manufacturer tells you that the triangular reflector is a solid-structured emitting device. It is composed of a small triangular pyramid reflecting material, which can make the light beam accurately return from the reflector, which has practical significance. The photoelectric sensor manufacturer tells you that it can change the emission angle from 0 to 25 relative to the optical axis, so that the light beam is almost from an emission line, and after reflection, it still returns from this reflection line.