| Patent Number |
Title Of Patent |
Date Issued |
| 6160933 |
Optical fiber wavelength multiplexer-demultiplexer |
December 12, 2000 |
| An optic fiber wavelength multiplexer-demultiplexer comprising a dispersing system (1) exhibiting a dispersing plane, at least one input fiber (2) with an output face, at least one output fiber (3) with an input face, and a device (4) for optic matching of the output face of the input fi |
| 6157764 |
Optic fiber wavelength multiplexer-demultiplexer |
December 5, 2000 |
| A multiplexer, demultiplexer or router includes an input fiber and an output fiber, each fiber having a core and a sheath. At least one of the input fiber and the output fiber includes an intermediate ring having an optic index greater than the optic indexes of immediately adjacent p |
| 6014482 |
Selective optical device and wavelength multiplexer-demultiplexer |
January 11, 2000 |
| A wavelength selective optical device includes a two-dimensional grating (6) and a device 11. The two-dimensional grating represents an intrinsic function. The device (11) is to change the complex amplitude of the electromagnetic field of the light wave, according to a filtering func |
| 5991482 |
Optic wavelength dispersing system |
November 23, 1999 |
| An optic dispersing system, designed for usage in a wavelength field of a beam, includes a network or grating (1) carried by a support (2) with a dilatation coefficient .epsilon.. The system suggested is temperature-stabilized. To do so, it contains a front blade or optical element ( |
| 5939648 |
System and method of introducing a sample for analytical atomic spectrometry allowing concomitan |
August 17, 1999 |
| A system for introducing a liquid sample (1) for analytical atomic spectrometry includes a nebulizer (20) and separator (27) at the exit (23) of the nebulizer. The system also includes at least one drain (30) fitted with evacuator (16, 17) for evacuating residual liquid (8) in a cons |
| 5898500 |
Device and method for three-dimensional measurements and observation in situ of a surface layer |
April 27, 1999 |
| Device and method for three-dimensional measurements and observation of a surface layer of a thin-film structure, comprising a monitoring unit 4 which includes a video camera 12, a wide-beam illumination source 14, a narrow-beam illumination source, 20, an operation and control unit and |
| 5889586 |
System of photodetection and associated process for analyzing a luminous flux |
March 30, 1999 |
| A photodetection system that analyzes a luminous flux (15) received on a line (10). The photodetection system includes an opaque mask (4) provided with at least one aperture (6), placed in the vicinity of the line, driver (7) designed to rotate the mask, detector (8, 9) of an angular pos |
| 5838848 |
N.times.N wavelength router, optical routing method and associated communication network |
November 17, 1998 |
| An N.times.N wavelength router (1) includes n m.times.m couplers (10, 15, 20, 25), N being equal to n.times.m, and the N inputs (11, 12, 16, 17, 21, 22, 26, 27) of the couplers being the inputs (E1-E8) of the N.times.N router. The N.times.N router also includes m n.times.n routers (30, 4 |
| 5808765 |
Multiplexer-demultiplexer for optical wavelengths |
September 15, 1998 |
| The present invention relates to a multiplexer-demultiplexer for optical wavelengths comprising:endpoints of input-output lines (22.sub.1, 22.sub.2, . . . ,22.sub.n),an endpoint of a transmission line (23),a diffraction network with a diffraction plane and,an optical system ensuring the optical |
| 5726438 |
Luminous flux measuring device with a gain-controlling slave circuit enabling the device to rapi |
March 10, 1998 |
| A luminous flux measuring device has a gain slaving circuit (10, 9), that receives an electrical output signal (m) produced by a photoreceiver (1) and includes a gain control circuit (9) and a comparator (10). The gain slaving circuit is connected to an A/D converter and a computer to re |
| 5666200 |
Method of ellipsometric measurement, an ellipsometer and device for controlling the carrying out |
September 9, 1997 |
| This invention relates to a method and a device for the ellipsometric measurement of physical parameters representative of a sample.The measured values I.sub.om, I.sub.sm and I.sub.cm are calculated (51, 52) from the signal (50) which represents the measured intensity I(t).In a first step (5 |
| 4836634 |
Wavelength multiplexer/demultiplexer using optical fibers |
June 6, 1989 |
| Selector for separating at least two wavelength bands from a complex light introduced into the apparatus through the end of an optical fiber (12) arranged in the immediate vicinity of the focal point of a concave mirror (5) producing a parallel beam directed towards a plane reflecting de |
| 4675860 |
Compact wavelength multiplexer-demultiplexer with variable filtration |
June 23, 1987 |
| Multiplexer-demultiplexer device for wavelengths in an optical transmission fiber (6) for introducing therein a wavelength from an emitter (18) and for extracting wavelengths therefrom towards receivers (19), comprising several spherical mirrors (13-14) at least one of which (3) is a sel |
| 4583820 |
Wavelength multiplexer/demultiplexer using optical fibers |
April 22, 1986 |
| Selector for separating at least two wavelength bands from a complex light introduced into the apparatus through the end of an optical fiber (12) arranged in the immediate vicinity of the focal point of a concave mirror (5) producing a parallel beam directed towards a plane reflecting de |
| 4571074 |
Spectrometry device for analyzing polychromatic light |
February 18, 1986 |
| Spectrometry device capable of splitting up, for analysis, polychromatic light, thus yielding a spectrum which extends into the ultraviolet, visible and near infra-red ranges. The device makes it possible to analyze the polychromatic light coming from an excitation source and comprises a |
| 4484793 |
Switching device between optical fibers |
November 27, 1984 |
| Switching device between optical fibers, for ensuring continuity of transmission between the end of a first fiber (2) and the end of any of a group of other fibers (3). The end of the first fiber (2) is placed at the center (C) of a spherical mirror (1) and the ends of the other fibers ( |
| 4470910 |
Chromatographic apparatus and process for its use |
September 11, 1984 |
| A liquid-phase preparative chromatographic apparatus comprising a column in the form of a cylindrical tube equipped at its lower section with a cap; a filling device to be connected by means of a compression nozzle and comprising a cylinder for actuating a non-porous solid body that |
| 4351643 |
Method for concentrating a low-concentration element in a solution |
September 28, 1982 |
| Method of concentrating a low-concentration element in a solution and removing other, high-concentration elements, using an ion exchange resin specific to the element to be concentrated.The resin is disposed in a mini-column less than 3 mm in diameter into which the solution is made to p |
| 4337415 |
High frequency inductive generator for the inductive coil of a plasma generator |
June 29, 1982 |
| High frequency inductive generator for the inductive coil of a plasma generator constituted by a head for inflow of gas into an inductive coil. The high frequency generator has a quarter wave anode resonant line oscillator circuit and a coupling circuit connected to the inductive coil. |
| 4298845 |
Dye lasers |
November 3, 1981 |
| In a dye laser comprising a cavity, one end of which is closed by an angular dispersion system, and which is provided with a separator for extracting the laser beam from the cavity, the separator is arranged so that the dispersive system and the system for application of the laser be |
| 4271100 |
Apparatus for producing an aerosol jet |
June 2, 1981 |
| Apparatus for producing an aerosol jet comprising an atomizing means and a flow of carrier gas for entraining the particles formed.Downstream of the atomizing means, the conduit for carrying the aerosol constitutes the central passage (20) of a double nozzle (21) whose annular passage (2 |
| 4204638 |
Process of coding a card with a diffraction grating having lines with irregular spacing |
May 27, 1980 |
| A process for coding a set of access cards adapted to control an apparatus for opening, locking or releasing a processing device and for the ultimate determination of the validity of a card when it is presented in the apparatus, the coding being effected by the formation on the cards of |
| 4191474 |
Spectrograph for an extended spectral field in which partial planar diffraction spectra are succ |
March 4, 1980 |
| A spectrograph for an extended spectral field having an inlet slot for defining a source of light to be analyzed and a dispersive system constituted by a concave holographic grating which has recording points with coordinates in relation with the coordinates of the light source to be |
| 4087183 |
Spectrograph |
May 2, 1978 |
| A spectrograph for use in analyzing an extended spectral field comprising a dispersive system consisting solely of one or more concave holographic gratings, each grating being specified so that the diffraction spectrum is formed in a plane. Where a plurality of gratings are provided they |
| 4072814 |
Furnace for melting metal by the Joule effect |
February 7, 1978 |
| A furnace for melting metal by the Joule effect to enable extraction of gases contained in the metal comprising a hollow tubular body which constitutes a heater resistor clamped between two electrodes, and a separate crucible for the metal which is supported within the tubular body a |
| 4068954 |
Monochromator having a concave holographic grating |
January 17, 1978 |
| A monochromator having a concave holographic grating which is turnable in rotation and provided with an inlet slot parallel to the lines of the grating for incident light and an outlet slot also parallel to the lines of the grating, the inlet and outlet slots being disposed on opposite |
| 4063818 |
Monochromator having a toroidal holographic diffraction grating and utilizable in the ultraviole |
December 20, 1977 |
| A monochromator having a fixed inlet slot, a holographic grating carried on a concave turnable support, and a fixed outlet slot, the support surface of the holographic grating being a concave portion of a toroidal surface, taken at the outer periphery of the toroid, and symmetrically dis |
