Abstract: A fiber optic switching system which includes an optical switch having a movable actuator and a light fiber coupled to the actuator which terminates at an end surface thereof for conducting light from a light source to the optical switch mechanism. A flexible reflective film whose reflectivity is conditioned to provide at least two different reflective surfaces is positioned such that an end surface of the actuator abuts the film throughout its movement from one position to another. A detector detects light reflected from the film. The actuator is movable so as to direct light from the light fiber from the one reflective surface of the film to another and the detector detects light reflected from the film so as to determine which reflective surface of the film from which light has been reflected.

Abstract: An optical control panel system which communicates by means of light to an electro-mechanical control system which, in turn, couples to various sensors and loads. The loads may, for example, be motors that perform various functions and the sensors may be plant system monitors for monitoring various facets of a process.

Abstract: A fibre optic switch for controlling the electrical power to a load or for logical applications is disclosed in which the switch has a secondary guided light beam to provide status indicator light. The moulded plastic components of the switch are used to provide the means for light transmission and control.

Abstract: A fibre optic switch which includes an actuator reversibly movable between at least two switch positions, an actuator position detector and a single optical fibre path connected between the actuator and the actuator position detector. A beam splitter is provided to couple light from a light source into the fibre so as to travel towards the actuator. A filter is selectably insertable into the path of light emanating from an end of the fibre at the actuator and a retro-reflector reflects the filtered light back to the fibre. The reflected light is directed by the beam splitter towards the actuator position detector.