Abstract: Optical device comprising: a spatial filter means for eliminating, from the light rays emanating from an observed scene those coming from a direction or restricted range of directions in space, while letting through most of the light rays coming from said scene; means for varying the direction or the restricted range of directions in space in correspondence with which the spatial filter means eliminates said light rays; a spectral dispersion means for imparting to the light rays coming from said spatial filter means a deviation that is dependent on their wavelength; and an image detector for recording the light rays dispersed by said spectral dispersion means, each point on said image detector receiving light rays coming from said scene and having a different wavelength depending on the direction in space from which they come.

Abstract: Optical device comprising: a spatial filter means for eliminating, from the light rays emanating from an observed scene those coming from a direction or restricted range of directions in space, while letting through most of the light rays coming from said scene; means for varying the direction or the restricted range of directions in space in correspondence with which the spatial filter means eliminates said light rays; a spectral dispersion means for imparting to the light rays coming from said spatial filter means a deviation that is dependent on their wavelength; and an image detector for recording the light rays dispersed by said spectral dispersion means, each point on said image detector receiving light rays coming from said scene and having a different wavelength depending on the direction in space from which they come.

Abstract: The invention concerns a device for acquiring the three-dimensional shape of an object (10) by opto-electronic process, comprising a chromatic system (18) for illuminating the object (10) and for picking up the light reflected or backscattered by the object (10), and a reflecting mirror (26) placed on the optical axis between the optical system (18) and an illumination slot (16) for deflecting the light reflected by the object towards a spectral analysis means (30).

Abstract: A spectral rejection device for forming an image on an optical sensor, including a system for forming a beam of light rays coming from an observed scene, a scanning system, a system for spectrally dispersing the beam in a direction, at least one mask disposed on the path of the dispersed rays to intercept a narrow band of wavelengths, and a system for combining the dispersed rays into a beam of parallel rays focused by a lens onto an optical sensor. The invention applies in particular to the spectral analysis of a luminous flux coming from an observed scene.

Abstract: The invention concerns a device for acquiring the three-dimensional shape of an object (10) by opto-electronic process, comprising a chromatic system (18) for illuminating the object (10) and for picking up the light reflected or backscattered by the object (10), and a reflecting mirror (26) placed on the optical axis between the optical system (18) and an illumination slot (16) for deflecting the light reflected by the object towards a spectral analysis means (30).

Abstract: A spectral rejection device for forming an image on an optical sensor, including a system for forming a beam of light rays coming from an observed scene, a scanning system, a system for spectrally dispersing the beam in a direction, at least one mask disposed on the path of the dispersed rays to intercept a narrow band of wavelengths, and a system for combining the dispersed rays into a beam of parallel rays focused by a lens onto an optical sensor.

Abstract: A method and a device for opto-electrically acquiring the shape of a surface by illuminating the surface (S) with light beams (10) having different wavelengths and which converge at different points on the axial illumination direction (Y) in the vicinity of the surface (S), by spectral analysis of the light reflected or backscattered by the surface (S) in the direction (Y) and by determining distances of points on the surface (S) relative to a reference plane (X, Y) from the wavelength and/or the spectral widths of the light analyzed.

Abstract: A method and apparatus for remote optical detection of a gas present in an observed volume using a thermal imager or camera including one or more sensitive elements which are sensitive to radiant fluxes in a determined band of wavelengths, two filters interposable on the optical axis of the camera, the filters having similar transmission bands, one of which includes an absorption line characteristic of the looked-for gas, while the other of which is complementary to said absorption line, and signal processing means for taking the difference between the radiated fluxes received from two points at different temperatures in the volume as observed first through one of the filters and then through the other filter, for taking the ratio of said differences, and for deducing therefrom whether the gas is present in the observed volume.

Abstract: A device for the bi-directional transmission of data between a master system and a slave system uses a single transmission antenna and a single reception antenna each tuned to the same frequency; the master system comprises first data transmission circuits for transmitting first data to the slave system by modulating an electromagnetic signal at the frequency; detection circuits for detecting, during the transmission of the electromagnetic signal, variations in electrical characteristics of the master system induced by a modulation of the impedance of the slave system as a function of second data to be transmitted from the slave system to the master system; and restoring circuits for restoring the second data on the basis of the detected variations; and the slave system comprises reception circuits connected to the reception antenna for restoring the first data; a rectifier circuit connected across the reception antenna for rectifying an electrical signal induced in the reception antenna by the electromagneti

Abstract: Method and apparatus for surveillance of a determined space in which a camera lens enables an image of said space to be formed on a set of photodetectors associated with information processing means, the set of photodetectors being a linear strip of photodetectors, for example, mounted so as to be fixed relative to the lens which is itself mounted to rotate about a transverse axis and which is displaceable by drive means to occupy predetermined angular positions about said axis.

Abstract: A microbeam laser machine for operating on objects having thin layers comprises a platen (14) which is rigid and undeformable and which has optical components mounted thereon defining a laser beam transmission path (34, 36, 38, 46), an illumination path (54, 55, 46), and an observation path (70, 74, 76). The invention is intended, in particular, for microoperations on integrated circuits and other objects having thin layers.