Temperature-Resistant Ir Measurement Probe

A temperature-resistant fibre-optic-coupled IR measurement probe and an FTIR measurement system with a connected temperature-resistant fibre-optic-coupled IR measurement probe are presented. The temperature stability is achieved by mounting the optical fibre sections (13, 14) in the temperature-controlled probe head housing (12) without any fastening points. The optical fibres are manufactured using a restoring force which acts along the optical fibre axes (22,23) in the direction of the probe element. In the event of a change in temperature, the optical fibres expand in the probe head housing. The probe head housing should be dimensioned in such a manner that, on the one hand, expansion of the optical fibres without damage is ensured and, on the other hand, the optical fibre ends (15,16) are mounted in front of the probe element (11) using a restoring force. This is achieved, for example, by means of plastic bending of the optical fibres in the probe head housing, wherein the optical fibres are firmly connected to the probe head housing in the section between plastic bending and flexible optical fibre section.