Editing Opto-isolator (section)

==Types of configurations==
{{Anchor |optosensor}}
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[[File:Gabelkopp.jpg|thumb|A reflective pair (left) and two slotted couplers with the light paths in purple]]

Usually, optocouplers have a ''closed pair'' configuration. This configuration refers to optocouplers enclosed in a dark container wherein the source and sensor are facing each other.

Some optocouplers have a ''slotted coupler/interrupter'' configuration. This configuration refers to optocouplers with an open slot between the source and sensor that has the ability to influence incoming signals. The ''slotted coupler/interrupter'' configuration is suitable for object detection, vibration detection, and bounce-free switching.

Some optocouplers have a ''reflective pair'' configuration. This configuration refers to optocouplers that contain a source that emits light and a sensor that only detects light when it has reflected off an object. The ''reflective pair'' configuration is suitable for the development of tachometers, movement detectors and reflectance monitors.

The later two configurations are frequently referred to as ''optosensors'' or ''[[photoelectric sensor]]s''.