Page 9 of catalogue Fibre optics of ifm Electronic GmbH

Fibre optics and Amplifiers

Precise connection of different fibre optics. Manual or automatic setting by means of “teach in”. LED display to check operation, switching status and function. Various Glass fibre materials for different applications. Easy mounting on DIN rail possible.

Introduction Fully automatic manufacturing Machines become more and more compact. Fibre optics are used where mounting space for photoelectric standard Sensors is confined. Advantages of these systems: The evaluation electronics and the optoelectronic components are located separately from the sensing surface of the system. Fibre optic sensing heads can therefore be mounted in places where access is difficult. Fibre optics are the best choice, in particular for short ranges. Versions of fibre optic systems Through-beam principle Transmitting and receiving fibre optics are laid separately. The two ends (fibre optic heads) are mounted opposite each other. The light beam interruption is evaluated according to the through-beam principle. The maximum range is 380 cm. Diffuse reflection principle Transmitting and receiving fibres are in one sheath. The sensing head incorporates receiving and transmitting fibre bundles. The ranges of the ifm sensors are max. 300 mm. Applications of fibre optic systems: Confined space The fibre optic head is directly located where sensing takes place, the mating amplifier where sufficient mounting space is available. Detection of minute objects Depending on the type of sensing head and range objects up to 0.5 mm can be detected safely. When the movement of objects is precise, it is possible to detect fine structures, e.g. thread pitches. High temperatures Fibre optics with metal sheath can be used up to 290 °C, fibre optics with metal silicone sheath up to 150 °C. Chemical resistance Metal silicone sheathed fibre optics are resistant to many aggressive chemicals.
Fibre optic systems can also be mounted in places where access is difficult. Minute objects up to 0.5 mm are detected safely.

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