Optical Sensor

An optical sensor is a device that converts light rays into electronic signals.

Usually, the optical sensor is part of a larger system integrating a measuring device, a source of light and the sensor itself. This is generally connected to an electrical trigger, which reacts to a change in the signal within the light sensor.

One of the features of an optical sensor is its ability to measure the changes from one or more light beams. This change is most often based around alterations to the intensity of the light.

When a phase change occurs, the light sensor acts as a photoelectric trigger, either increasing or decreasing the electrical output, depending on the type of sensor.

Optical sensors can work either on the single point method or through a distribution of points.

In terms of the distribution concept, the sensor is reactive along a long series of sensors or single fiber-optic array.

For example, when the door to a completely darkened area such as the inside of a copy machine is opened, light impacts the sensor, causing an increase in electrical productivity. This will trigger an electric response and stop the machine for safety.