Optical measuring arrangement for capturing the local stress of a flexible object, comprising - a spectral broadband light source for emitting spectral broadband light (a), - a first fibre Bragg grating sensor to which the spectral broadband light (a) is supplied and which subsequently reflects light (c) of a specific first wave length (λ 1), in which the reflection spectrum of the first FBG sensor has a maximum, - a first optical splitter arranged between the light source and the first FBG sensor that decouples the light (c) reflected by the first FBG sensor, - a second fibre Bragg grating sensor to which the light (c) reflected by the first FBG sensor is supplied and that reflects light (e) of a specific second wave length (λ 2), in which the reflection spectrum of the second FBG sensor has a maximum, - a second optical splitter arranged between the first splitter and the second FBG sensor that decouples the light (e) reflected by the second FBG sensor, - a light-sensitive sensor and evaluating unit connected to the same (11, 12), in which the light (e) reflected by the second FBG sensor is conducted onto the light-sensitive sensor and the evaluating unit (11, 12) is configured to determine the stress of the object from the sensor signal of the light-sensitive sensor, characterised by - the first FBG sensor and the second FBG sensor being firmly connected to the object in such a manner that the stress of the object is transferred to both FBG sensors (7, 9), - the first and second wave length (λ 1, λ 2) differing in such a manner that the reflection spectra of the first and second FBG sensor (7, 9) overlap only partly in the non-stress state of the object, and - the two FBG sensors (7, 9) being arranged on or in the object in such a manner that they absorb forces that act in opposite directions. - a spectral broadband light source for emitting spectral broadband light (a), - a first fibre Bragg grating sensor to which the spectral broadband light (a) is supplied and which subsequently reflects light (c) of a specific first wave length (λ 1), in which the reflection spectrum of the first FBG sensor has a maximum, - a first optical splitter arranged between the light source and the first FBG sensor that decouples the light (c) reflected by the first FBG sensor, - a second fibre Bragg grating sensor to which the light (c) reflected by the first FBG sensor is supplied and that reflects light (e) of a specific second wave length (λ 2), in which the reflection spectrum of the second FBG sensor has a maximum, - a second optical splitter arranged between the first splitter and the second FBG sensor that decouples the light (e) reflected by the second FBG sensor, - a light-sensitive sensor and evaluating unit connected to the same (11, 12), in which the light (e) reflected by the second FBG sensor is conducted onto the light-sensitive sensor and the evaluating unit (11, 12) is configured to determine the stress of the object from the sensor signal of the light-sensitive sensor, characterised by - the first FBG sensor and the second FBG sensor being firmly connected to the object in such a manner that the stress of the object is transferred to both FBG sensors (7, 9), - the first and second wave length (λ 1, λ 2) differing in such a manner that the reflection spectra of the first and second FBG sensor (7, 9) overlap only partly in the non-stress state of the object, and - the two FBG sensors (7, 9) being arranged on or in the object in such a manner that they absorb forces that act in opposite directions.