Abstract: The arrangement for supercapacitor device comprises an electrode (1) provided with an electrically conductive element (4). It also comprises a separator element (3) fixed against a first face (4a) of the electrically conductive element (4), the arrangement being perforated with a plurality of through holes (5) which pass through both the electrically conductive element (4) and the separator element (3). The perforated separator element (3) forms a membrane that is both electrically insulating and porous to ions of an electrolyte of the supercapacitor device. The electrically conductive element (4) of the electrode (1) being perforated, the equivalent surface area of the electrodes of the supercapacitor device is dependent on the number of holes made and on their depth.

Abstract: The arrangement for supercapacitor device comprises an electrode (1) provided with an electrically conductive element (4). It also comprises a separator element (3) fixed against a first face (4a) of the electrically conductive element (4), the arrangement being perforated with a plurality of through holes (5) which pass through both the electrically conductive element (4) and the separator element (3). The perforated separator element (3) forms a membrane that is both electrically insulating and porous to ions of an electrolyte of the supercapacitor device. The electrically conductive element (4) of the electrode (1) being perforated, the equivalent surface area of the electrodes of the supercapacitor device is dependent on the number of holes made and on their depth.

Abstract: A device for measuring the concentration of a gas contained in a cavity and for checking the operation of a catalytic element in an exhaust line in an automobile vehicle. A first emitter (E1) composed of an optical pumped micro-cavity and for which the emission spectrum is within the gas absorption band emits a first radiation that passes through the cavity. A second emitter emits a second radiation that passes through the cavity. A receptor measures the optical intensity (I) of the radiation that passed through the cavity.

Abstract: A device for measuring the concentration of a gas contained in a cavity and for checking the operation of a catalytic element in an exhaust line in an automobile vehicle. A first emitter (E1) composed of an optical pumped micro-cavity and for which the emission spectrum is within the gas absorption band emits a first radiation that passes through the cavity. A second emitter emits a second radiation that passes through the cavity. A receptor measures the optical intensity (I) of the radiation that passed through the cavity.

Abstract: The invention relates to a velocity measurement device of the coherent detection type comprising:an active laser medium (10),an input mirror (M.sub.1) and a first output mirror (M.sub.3) defining, with the laser medium, a first resonant cavity of quality factor Q.sub.max making it possible to emit a laser beam (4),a second output mirror (M.sub.2) defining, with the active laser medium (10) and the input mirror (M.sub.1), a second resonant cavity of quality factor Q.sub.min (<Q.sub.max), making it possible to amplify a measuring signal from a target which has intercepted the laser beam (4) emitted with the aid of the first resonant cavity.

Abstract: This invention relates to a device for measuring the duration of a time interval between a start signal (D) and an end signal (F) comprising: a clock (H) supplying pulses with a period T, a digital circuit (2, 3, 4) to carry out a coarse measurement of the number of clock pulses between D and F, an analog circuit (6, 8, 10, 12, 14) to carry out a fine measurement of the time respectively between D and the first (respectively between F and the last) clock pulse which begins after D (respectively before F), this circuit comprising: means (8, 10) of generating N ramps with the same direction, means of sampling at least one the ramps at the instants that D and F occur. Application to a microlaser telemeter.

Abstract: Autodyne laser velocimeter comprising:a microlaser (10) capable of emitting respectively a first (40) and second (42) beam,pumping means (12) capable of supplying a pumping beam light to the microlaser,optical means (14) capable of directing the first beam (40) at a target (50) and of sending the light re-emitted by the target (50) to the microlaser (10),photoelectric detection means (16) of receiving the second beam and emitting a detection signal corresponding to a modulation in the intensity of the second beam, andmeans (17) of processing the detection signal to determine a characteristic magnitude of a displacement velocity of the target.Application to metrology.

Abstract: This laser telemetry device operating on the principle of the measurement of the transit time of a light pulse, is characterized in that it comprises:a passive switching microlaser (2),means (6, 10) for receiving a light pulse (18, 19) reflected by an object (4) and for the detection of the reception time of said pulse,means (8, 10) for the detection of the emission time of a pulse from the microlaser (2),means (12) for measuring the time interval or slot separating the microlaser pulse emission time and the reflected beam reception time.

Abstract: A device for measuring the duration of a time slot or interval includes a first clock for supplying pulses of period T and a second clock, whose pulses are shifted with respect to the first. A digital circuit counts the number of pulses of the clocks, which are followed by a complete period T and which occur between the start signal and the stop signal. An analog circuit determines the times separating the start signal and the start of the first pulses of the clocks after the start signal and the times separating the stop signal and the end of the final periods of the clocks before the stop signal, and converts the analog data into digital data. A processing circuit determines the duration of the time slot, and resolves any ambiguity situation, which could lead to a clock period counting error.

Abstract: The invention relates to time of flight telemetry and has application to detection and imaging systems. Determination takes place of a response time of an optoelectronic measuring chain or cascade (20, 34, 36) able to measure an outward and return time (flight time) of a first light pulse emitted in the direction of an object whose distance is to be determined. This response time, determined by means of a second light pulse emitted and then detected by the measuring chain or cascade, is subtracted from the previously determined outward and return time in order to obtain a corrected time used for calculating the sought distance.