Abstract: A device for conveying a substance that comprises: a first duct for containing the substance; an optical fiber connected to the first duct and extending along the duct, the optical fiber including several detection members spaced along its length, each detection member having a separate reflection spectrum that varies with the presence of the substance to be detected; a control device including a light source capable of emitting a light in the reflection spectrum of each detection member, a light receiver capable of detecting the light amplitude in the detection spectrum of each detection member, and an analysis module capable of determining the presence of a leak of the substance based on the light amplitude provided by the light receiver.

Abstract: A measuring device including at least one optical fiber which contains a series of Bragg gratings distributed between first and second ends of the fiber. A light source is arranged to emit a luminous flux at multiple wavelengths incident on the first end of the fiber, and an instrument connected to the second end of the fiber measures the power of the light transmitted at each emitted wavelength, enabling implementation of the method. In the method the power of the light transmitted by the optical fiber in a spectrum including wavelengths is measured.

Abstract: The invention relates to a method for producing an ophthalmic lens exhibiting optical function coexisting in producing an optical component (10) incorporating at least one type of active material (2) which is distributed in a parallel direction to the surface thereof. Said active material exhibits a radiation-modifiable optical property. The active material (5) portions disposed through the component (10) surface are, afterwards, selectively irradiated in such a way that the optical function is obtainable by modulating said property from one portion to another one, wherein the sizes of said portions are less than 1 mm.

Abstract: A device for conveying a substance that comprises: a first duct for containing the substance; an optical fiber connected to the first duct and extending along the duct, the optical fiber including several detection members spaced along its length, each detection member having a separate reflection spectrum that varies with the presence of the substance to be detected; a control device including a light source capable of emitting a light in the reflection spectrum of each detection member, a light receiver capable of detecting the light amplitude in the detection spectrum of each detection member, and an analysis module capable of determining the presence of a leak of the substance based on the light amplitude provided by the light receiver.

Abstract: The invention relates to a method for producing an ophthalmic lens exhibiting optical function coexisting in producing an optical component (10) incorporating at least one type of active material (2) which is distributed in a parallel direction to the surface thereof. Said active material exhibits a radiation-modifiable optical property. The active material (5) portions disposed through the component (10) surface are, afterwards, selectively irradiated in such a way that the optical function is obtainable by modulating said property from one portion to another one, wherein the sizes of said portions are less than 1 mm.

Abstract: In the method for on-substrate cleaving of a sol-gel waveguide, a sol-gel buffer layer is produced on a substrate, and a first portion of the sol-gel buffer layer is masked. The second portion of the sol-gel buffer layer is exposed to UV light to make this second buffer layer portion resistant to a given solvent. A sol-gel guide layer is produced on the sol-gel buffer layer after exposure of that second buffer layer portion to UV light. Then the sol-gel guide layer is covered with a mask having an elongated slit opening presenting the general configuration of the waveguide. This elongated slit opening crosses an intersection between the first and second buffer layer portions. The masked sol-gel guide layer is exposed to UV light to form the waveguide in the sol-gel guide layer, exposure to UV light rendering the waveguide resistant to the given solvent.