Abstract: A device for emitting a laser beam comprises, in a housing, a laser-emitting component emitting a laser beam and mounted on a base, a heat-dissipating component, at least one collimating lens, and a lens mounting. The heat-dissipating component dissipates the heat produced by the laser of the laser-emitting component and secures the base of the laser-emitting component. The heat-dissipating component has a positioning mark and at least three holes for centering pins machined together with the positioning mark. The lens mounting secures the lens opposite the laser-emitting component and is positioned relative to the heat-dissipating component by at least three centering pins positioned in the holes of the heat-dissipating component.

Abstract: The photoacoustic device for measuring the quantity of at least one gas. The Helmholtz-type esonant container comprises at least two tubes closed at their ends and linked together, close to each of their respective ends, by capillary tubes of diameter lower than the diameter of the parallel tubes. Each of the two radiant laser energy sources is physically separated and adapted to supply an excitation energy to the gas in the container at a different emission wavelength. The modulation means modulates the excitation energy supplied by each laser energy source with a modulation frequency corresponding to the acoustic resonance frequency of the container. At least one acoustoelectric transducer disposed on one of the tubes detects the produced acoustic signals produced and supplies an electric signal representative of the gas concentration in the container.

Abstract: According to the invention, in an assembly comprising an electronic component (108), said component is connected by microbeads (107) to at least one heat sink (106, 109), said beads being connected to electrically-conductive lines on said electronic component and to electrically-conductive lines on at least one heat sink, said beads carrying, on the one hand, electrical signals between the electronic component and each heat sink bearing said electrically-conductive lines and, on the other hand, the heat from the electronic component to each heat sink, via heat conduction.

Abstract: Process and device for the passive alignment of optical fibers and optoelectronic components. According to the invention, at least one component comprising a substrate layer, a first layer and a second layer comprising at least one active zone (16) is used, the component is placed on the support, the second layer facing it, the component is at least partially coated with a coating material (30) from the support to a level beyond that of the first layer and selectively up to this level at least a part of the substrate facing the active zone is removed in order to reveal a cavity (38) able to accept one end of at least one optical fiber (32).

Abstract: An image sensor comprises a detector circuit (17) with detector diodes (3), which are reverse biased during image sensing. It is characterized in that the cathode voltage of the detector diodes is controlled by forward biasing detector circuit (17) diodes via the read circuit (20). The control diodes can be dedicated diodes or forward biased photodetector diodes. In the latter case, a picture is taken in several sequences.

Abstract: Process and device for the passive alignment of optical fibres and optoelectronic components.