Abstract: A multi-spectral light-field device, including an imaging component, arranged to image a light-field emitted by an object point of an object and for setting an input signal including a range of incidence angles on an optical filter. The optical filter has a transmission function depending on the incidence angles to transform the input signal into an output signal including a spectral distribution associated to an angular distribution. A micro-lens array is arranged to transform the spectral distribution of the output signal into a spatial distribution on an image plane. This multi-spectral light-field device is adapted to be integrated in a small, compact and/or handheld device, as a smartphone and also to deliver high resolution images. Also an imaging system which is a compact twin camera device. Also an object identification system allowing an image reconstruction in real-time on limited computational resources of a mobile device, by using a machine-learning module.

Abstract: The invention concerns a device comprising at least a transducer (1) in the form of a matrix wherein is embedded an optical fiber segment (7) provided with means designed to modify light transmission in accordance to a stress to be measured. One input end of said optical fiber (7) is designed to be connected to an optical transmitter (8) and one output end to an optical detector (9). The transducer (1) is elongated in shape, longitudinally run through by said optical fiber segment (7). A median section (2) is designed to be subjected to stresses to be measured, its two ends being respectively secured to two portions transmitting stresses (3, 4) to said median section (2), arranged to be attached to the structure to be measured Said matrix is made of a composite material reinforced with filaments to provide the transducer (1) with a modulus of elasticity close to that of the structure to be measured.

Abstract: An optical sensor with intermodal interferometry, using a bimodal optical fiber propagating a first mode and giving rise to a second mode coupled to the first in response to a disturbance cause by a physical or chemical quantity of which it is wished to determine the position along the optical fiber by compensating the difference in the delay time between modes at the input of the interferometer.