Abstract: A system for measuring a solution pH includes a potentiostat with a working electrode made of an electro-conductive solid polymer transducer, an input to receive the potential to be applied between the working electrode and a reference electrode, and an output to transmit a signal representative of the current flowing between a counter electrode and the working electrode, the three electrodes being immerged into the solution. The system further includes a digital processor connected to a digital to analog converter for generating the potential to be applied between the working and the reference electrodes; and to an analog to digital converter for receiving a digital value representative of the current. The digital processor is adapted to modify the potential to maintain the current inside a predetermined range such that the potential is representative of the solution pH when the current is inside the predetermined range.

Abstract: The present invention relates to a compliant deformable conductor and a method for producing the same, comprising a wire or a tube made of an electrically insulating material and one or more electrical leads applied on said wire or tube, wherein one or more of said leads comprise a plurality of islets of conductive material, forming an electrically conductive layer providing electrical conduction and/or electrical percolation.

Abstract: A system for measuring a solution pH includes a potentiostat with a working electrode made of an electro-conductive solid polymer transducer, an input to receive the potential to be applied between the working electrode and a reference electrode, and an output to transmit a signal representative of the current flowing between a counter electrode and the working electrode, the three electrodes being immerged into the solution. The system further includes a digital processor connected to a digital to analog converter for generating the potential to be applied between the working and the reference electrodes; and to an analog to digital converter for receiving a digital value representative of the current. The digital processor is adapted to modify the potential to maintain the current inside a predetermined range such that the potential is representative of the solution pH when the current is inside the predetermined range.

Abstract: The present invention relates to a compliant deformable conductor and a method for producing the same, comprising a wire or a tube made of an electrically insulating material and one or more electrical leads applied on said wire or tube, wherein one or more of said leads comprise a plurality of islets of conductive material, forming an electrically conductive layer providing electrical conduction and/or electrical percolation.

Abstract: The invention concerns a semipermeable chamber for encapsulation of cells producing at least a biological substance of interest, characterised in that it consists of a porous polycarbonate biocompatible film modified at the surface by generated polar sites and covered with at least a layer of hydrophilic polymer.

Abstract: The invention concerns a semipermeable chamber for encapsulation of cells producing at least a biological substance of interest, characterised in that it consists of a porous polycarbonate biocompatible film modified at the surface by generated polar sites and covered with at least a layer of hydrophilic polymer.

Abstract: A fringe deflectometry apparatus illuminates an optical component to be measured using radiation with a known wavefront, deflects the radiation after it has been reflected or transmitted by the optical component to be measured, and materializes a reference ray. Transverse aberration of the reference ray after reflection or transmission by the optical component is measured. A deflectometry method using the apparatus enables an absolute phase reference to be provided.

Abstract: The present invention concerns a biomaterial for the selective adhesion of cell and/or tissue, which comprises a polymeric support having an heterogeneous surface conditioned with a surfactant and an extracellular matrix protein or a portion of said protein. The present invention concerns also the biosensor, the diagnostic device, the bioreactor, the tissue and the organ comprising the biomaterial according to the invention.

Abstract: A method and device for measurement of the geometrical or optical structure of an optical component such as a lens or a mold for making lens are provided. The method comprises the steps of illuminating the optical component to be measured with incident light having a known wavefront, measuring, in a given plane, the maps of the wavefront slopes of the light, after reflection at or transmission by the optical component, and deducing the surface topography or refraction index map of the optical component to be measured from the measurements of the slope maps by the application of at least one calculating procedure.

Abstract: A device for phase detection testing any kind of optical system, in particular an ophthalmic lens, comprises along an optical axis, an emission device which constitutes a light source, a holding station which receives the optical system under test, an array, a receiving device which receives the image observable downstream of the array, and a data processing device which exploits this image by phase detection. Between the holding station and the array is a convergence adapter element and the data processing device includes a ray plotting program and a calibration system allowing for theoretical and manufacturing aberrations due to the convergence adapter element.

Abstract: A device for phase detection testing any kind of optical system, in particular an ophthalmic lens, comprises, along an optical path, an emission device which constitutes a light source, a holding station which receives the optical system under test, an array, a receiving device which receives the image observable downstream of the array, and a data processing device which exploits this image by phase detection. Between the light source and the holding station is a separator element which constitutes on the axis of the optical path a semi-reflecting surface. The receiving device is disposed to the side, in line with the separator element. The data processing device includes a ray plotting program and a calibration system allowing for theoretical and manufacturing aberrations due to the separator element.

Abstract: A curved acoustic probe provided with a plurality of electroacoustic transducers delivers a beam of acoustic energy which is directed by electronic scanning. Electronic scanning is carried out by utilizing only those electroacoustic transducers which are capable of insonating the target. It is thus possible to employ a large number of electroacoustic transducers in respect of each azimuth and therefore to obtain high definition. The invention applies to imaging techniques involving the use of acoustic waves such as ultrasonic waves and is primarily concerned with the field of ultrasonic medical imaging. Chief among potential applications are nondestructive testing, production of images within liquids such as, for example, underwater or ocean-bottom images.