EP0992759B1 - Vorrichtung zur Justierung eines Lasersendungskanals mit einem passiven Beobachtungskanal - Google Patents

Vorrichtung zur Justierung eines Lasersendungskanals mit einem passiven Beobachtungskanal Download PDF

Info

Publication number
EP0992759B1
EP0992759B1 EP99402413A EP99402413A EP0992759B1 EP 0992759 B1 EP0992759 B1 EP 0992759B1 EP 99402413 A EP99402413 A EP 99402413A EP 99402413 A EP99402413 A EP 99402413A EP 0992759 B1 EP0992759 B1 EP 0992759B1
Authority
EP
European Patent Office
Prior art keywords
laser
emission
channel
photoluminescent
excitation beam
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP99402413A
Other languages
English (en)
French (fr)
Other versions
EP0992759A1 (de
Inventor
Michel Thomson-CSF Propriété Intellect. Papuchon
Denis Thomson-CSF Propriété Intellect. Rabault
Martin Thomson-CSF Propriété Intellect. Defour
Jean-Paul Thomson-CSF Propriété Intel. Pocholle
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Thales SA
Original Assignee
Thales SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Thales SA filed Critical Thales SA
Publication of EP0992759A1 publication Critical patent/EP0992759A1/de
Application granted granted Critical
Publication of EP0992759B1 publication Critical patent/EP0992759B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41G—WEAPON SIGHTS; AIMING
    • F41G3/00—Aiming or laying means
    • F41G3/32—Devices for testing or checking
    • F41G3/326—Devices for testing or checking for checking the angle between the axis of the gun sighting device and an auxiliary measuring device

Definitions

  • the invention relates to a device for the harmonization between a laser emission channel and passive observation channel, optical channels can be of separate or confused axes. Harmonization consists of make the optical axes of these channels parallel so that they have a line of common sight.
  • the invention is particularly applicable to target designation comprising a laser path and a passive path observation type imager or deviation meter. It also applies to active / passive imaging systems including a laser emission pathway scanning and a passive imaging channel. More generally, it applies to any system for which it is necessary to harmonize the emission channel laser and the passive observation path.
  • the target designation by laser is advantageously carried out thanks to a 'pod' (this term meaning nacelle in Anglo-Saxon language) arranged in external carriage of the aircraft.
  • a 'pod' this term meaning nacelle in Anglo-Saxon language
  • he can include an imaging channel with infrared detection, in band II or III, for locating the target and a laser path, whose optical axis can be separate or confused with that of the imaging channel, for example emitting in the near infrared and 'locked' on the imaging channel.
  • This locking assumes perfect 'alignment' between the two tracks, i.e. the perfect parallelism of their optical axes (combined or not), defining then the same line of sight. This harmonization must be able to be checked during the mission.
  • the emission wavelength of the laser is not included in the spectral band of the imaging channel sensor or if the laser emits pulses that are too short to be detected by the sensor, it is not possible to harmonize the channels by taking a fraction of the laser beam and reflecting it back to the sensor in order to determine the distance between the spot formed by the laser on the sensor and the center of the sensor.
  • French patent application 2,669,427 describes a device for checking the alignment of a laser beam sighting track and a track infrared imaging, for example in a laser designation pod. It is composed of a case comprising a cassette containing a film of polyimide and means of advancement of this film. During the procedure harmonization, the laser beam is focused on the film which heats up, thus generating a hot spot visualized on the infrared detector, which allows to measure the alignment deviation of the two channels. To be visible in band II or III, the heating must be significant and leads to destruction local film, which explains the presence of means to advance the film put in place.
  • the case is bulky and the solution described does not allow to harmonize during designation operations or to harmonize for the operational lines of sight, by particularly in the case where the system foresees a possible deflection line of sight.
  • the device according to the invention overcomes these drawbacks by putting in works conversion means to obtain from a fraction of the incident laser beam for example, a beam detectable by the passive channel detector. These means are based on the properties of photoluminescence of certain materials.
  • the invention relates to a device for harmonization between an emission channel comprising a laser emitting a laser beam and a passive observation path comprising a sensor, the device comprising means for converting a light beam incident in a retropropagative beam.
  • the device is characterized in that that it includes optical means making it possible to send simultaneously, towards the emission channel, almost all of the laser beam and, towards the means conversion, an excitation beam forming the incident beam and whose direction of propagation and divergence are related to those of the laser beam transmission to the conversion means, in that the means of conversion include a photoluminescent material, which, when excited wavelength of the excitation beam, emits radiation whose wavelength is within the spectral band of the channel sensor of observation as well as an optical assembly allowing to focus the excitation beam in the photoluminescent material and collect at minus part of the radiation emitted to form the beam retropropagative, and in that it further comprises means for sending the backpropagagative beam on the sensor allowing to locate in time real harmonization faults.
  • the means of conversion include a photoluminescent material, which, when excited wavelength of the excitation beam, emits radiation whose wavelength is within the spectral band of the channel sensor of observation as well as an optical assembly allowing to focus the excitation beam in the photolumin
  • the excitation beam is simply a fraction of the laser beam from the emission channel, sufficient to perform the conversion.
  • the means of converting the device according to the invention have a reduced size allowing great flexibility of implementation of harmonization procedures.
  • the very large variety of photoluminescent materials in terms of spectral band of emission and of lifetime of emission makes it possible to adapt the means of conversion to the characteristics of the sensor of the passive observation channel.
  • Figure 1 illustrates a layout diagram of a device according to the prior art of the patent cited above in a target designation system by laser pod type guidance.
  • the system considered here comprises an emission channel comprising a LAS laser emitting a laser beam FL whose optical axis is shown in dotted lines alternating short and long in Figure 1.
  • the LAS laser is for example a laser Nd: YAG type pulse emitting pulses of a few tens from nanoseconds to 1.06 ⁇ m for designation and / or telemetry.
  • the laser beam FL is in this example substantially collimated.
  • the system also includes a passive observation channel the optical axis of which is shown in dotted lines in FIG.
  • the detector can be a type imager thermal imager or a distance meter in the case for example of the designation of a target illuminated by an additional light beam.
  • the optical axes of the two channels are superimposed by means of a MEL mixer, for example a cube dichroic reflecting almost the entire laser emission flux and transmitting almost all of the incident infrared flux. But the two ways could be separate, with parallel optical axes.
  • the line of sight is common between the two ways; she can present, as in the example illustrated in Figure 1, a possibility of travel allowing to explore an important field, thanks to two rotations, indicated ROT A and ROT B, around two perpendicular axes of rotation.
  • a set of two beam alignment mirrors ML1 and ML2 laser (FL) is used defining the two axes around which the rotations.
  • the system also includes an afocal AFO device, common to both channels in the example illustrated in Figure 1, allowing to extend the laser beam (FL) of the emission channel and to collect the flux emitted by a scene to be observed.
  • the set including in particular the afocal device, the MEL mixer, the OBJ objective and the DET sensor of the passive observation channel forms the optical sighting head VIS, movable around axes of rotation ROT A and ROT B, the different elements of the head aimed being mechanically united.
  • FIG. 1 illustrates an example of setting up a harmonization device according to art which applies to a system in which the DET detector of the observation path is sensitive in the infrared. We assume that the laser emission emits in the visible or in the near infrared and that it cannot not be detected by the DET detector.
  • the device of the prior art includes a housing 10 in which there is a polyimide film 12 and means of advancement of this film not shown.
  • An optical assembly 11 allows the incident laser beam FL to be focused on the film which absorbs the incident and heating flux and collimation of the thermal flux emitted by the film to form a beam FC parallel to the incident beam FL.
  • the show thermal is done in the infrared and can therefore be viewed by the detector of the observation path, thus making it possible to identify faults harmonization. These faults are then corrected, for example by actuating a mirror MIR for adjusting the infrared imaging channel, or by processing of the acquired images, the reference point in the image being amended.
  • the device of the prior art which requires a complex mechanics for unwinding the film, is bulky and requires almost all the laser power of the emission channel. It is usually attached to the pod structure, so that to perform the harmonization procedure, the VIS optical sighting head is returned, to be in front of the harmonization device, as is shown in Figure 1.
  • the harmonization procedure therefore requires a interruption of image taking; it can only be done along a line of target which, moreover, is not operational.
  • FIG. 2 An embodiment of the device according to the invention and its implementation is shown schematically in Figure 2.
  • the designation system target chosen to illustrate the harmonization device is the same as that of FIG. 1.
  • the laser beam of the emission channel is substantially collimated and the optical axes of the two channels are superimposed using the MEL mixer, for example a dichroic cube.
  • the device according to the invention comprises conversion means MC comprising a photoluminescent material which, excited to length wave of an excitation beam whose direction of propagation and divergence are related to those of the emission laser beam, emits a radiation whose wavelength is within the spectral band of observation path sensor.
  • Photoluminescence results from the interaction between a material and an external light source.
  • the photoluminescent material the atoms, after absorption of a photon, are excited to a higher energy level and spontaneously relax towards a lower energy level, emitting a photon during the process.
  • the wavelength of the emitted photon is greater than that of the absorbed photon.
  • the excitation beam FE is simply a fraction of the laser beam (FL) of the emission path formed by the residual flux of the emission laser beam not reflected by the MEL cube. This fraction is very small (a few percent, for example) because most of the laser flux is reflected back to the target but it is sufficient because the physical mechanism involved is very effective.
  • the MC conversion means are for example centered on an axis parallel to that of the emission laser beam FL incident in the cube MEL and positioned so that all of the laser flux is collected emission transmitted by the cube MEL and forming the excitation beam FE.
  • the conversion means also include a set optics for focusing the excitation beam in the material photoluminescent and collect at least some of the radiation emitted to form a back-propagating FC beam, i.e. propagating in the same direction as the excitation beam but in opposite direction and having the same divergence.
  • the optical assembly can be constituted for example a concave mirror 21, achromatic in the spectral band of the sensor of the observation path, the photoluminescent material, denoted 22, being positioned so that the excitation beam is focused at inside the material. At the point of focus, the material emits so isotropic a light wave in the spectral band of the sensor. A part of this flux is collected by the mirror and reflected forming the FC beam.
  • the FC beam backpropagative has the same optical directional characteristics and of divergence as the incident excitation beam and therefore that the beam emission laser, which is the property sought in the context of a harmonization system.
  • the emission laser beam is significantly collimated and the excitation beam is a beam parallel to the emission laser beam; the beam resulting from the conversion is therefore collimated, parallel to the excitation beam, propagating in opposite directions.
  • the means of conversion then behave like a cube corner which, associated with cube MEL makes it possible to return to the DET sensor of the observation channel part of the FC beam resulting from the conversion.
  • the device according to the invention also works when the separation of the observation paths passive and laser emission is not done in collimated beams but in converging beams.
  • the excitation beam comes from a remote point over. You just need to have the right conjugation optics between the point from which the excitation beam comes and the material photoluminescent so that the beam (FC) resulting from the conversion is retropropagative of the excitation beam.
  • the optical assembly of the means of conversion may also contain dioptric elements (lens of focusing for example, associated or not with a collection mirror of the flow). In all cases, a simple optical assembly is sufficient; in particular it there is no need to set up fine and bulky mechanics.
  • the part of the FC beam resulting from the reflected conversion to the DET sensor is weak because the MEL mixing cube is designed to leave pass the radiation emitted by the scene and detected by the observation path. But the photoluminescence mechanisms are efficient enough so that the part of the FC beam focused on the sensor can be detected.
  • the means MC are integrated into the VIS optical sighting head, that is to say integral with the elements component as shown in Figure 2. So for each position of the aiming head defined by the rotations ROT A and ROT B, a harmonization procedure is possible. It allows to check if the stain resulting from photoluminescence on the DET detector of the passive channel, characteristic of the optical axis of the laser emission channel, is well centered on the detected image. It should be noted that this stain can be very fine because, unlike thermal mechanisms, there are no diffusion effects in photoluminescence mechanisms. Also, the stain resulting from the photoluminescence has roughly the same diameter as the spot of focusing of the excitation beam in the material.
  • the MC conversion means can be fixed, not integral with the aiming head, centered in the same way as above on the incident laser beam in the mixer.
  • the device according to the invention can also be used in a optronic system, for example a guiding designation system 'pod' type laser, in which the optical axes of the emission and the passive path are distinct.
  • a optronic system for example a guiding designation system 'pod' type laser, in which the optical axes of the emission and the passive path are distinct.
  • FIG. 3 An example of such a system is shown schematically in FIG. 3.
  • each channel comprises an afocal device, noted respectively 31 for the laser pathway and 32 for the imaging pathway.
  • the VIS optical sighting head comprising the elements of the laser channels and is mobile, for example according to the rotations ROT A and ROT B as previously described.
  • Part of the laser beam of the track emission is taken from the laser channel using a dichroic blade 33 forming the FE excitation beam then sent to the means of MC conversion.
  • the FC beam resulting from the conversion and backpropagative of the beam FE is partially reflected by the blade 33 then sent, to by means of a set of blades 34.35 towards the DET sensor of the passive channel observation.
  • the conversion means are for example fixed on the pod; in this case the harmonization is done according to a single line of sight.
  • the conversion means can be mobile so that you can follow the movements of the aiming head, according to rotations independent of the line of sight movements.
  • a photoluminescent material in the case of the harmonization of a channel laser emitting pulses of a few tens of nanoseconds at 1.06 ⁇ m and a sensitive passive observation channel in band II (about 3-5 ⁇ m), can be used solid material doped with photoluminescent ions, for example a rare earth like Erbium. Erbium ions indeed have a emission around 2.8 ⁇ m (detectable by the band II sensor) when they are excited at wavelength 1.06 ⁇ m.
  • FIG. 4 thus represents a setting possible.
  • the collimated FE excitation beam crosses the photoluminescent material 22 which appears as a thick plate of the order of a millimeter then is focused by the mirror 21 in the material 22 according to a focusing spot whose diameter is of the order of ten microns, creating a high power density.
  • the plate isotropically emits a light wave whose wavelength is close to 2.8 ⁇ m.
  • Part of the flow is collected by the mirror and collimated, thus forming the parallel FC beam which will be detected by the DET sensor of the imaging channel. Note that the flow not collected by the mirror is not annoying because it is very defocused on the channel sensor imaging and is therefore not detected.
  • the previously described configuration has many advantages; in particular, the adjustment precision in position of the photoluminescent material relative to the mirror is easy to obtain because it is enough that the focal point is inside the slide.
  • the device according to the invention is thus insensitive to the effects because a change in temperature leads to a displacement longitudinal of the focal point which has no disturbing effect because the point of focus remains inside the material.
  • the powers of the lasers of the emission channels in this type of target designation system are of the order of 100 MW for pulse widths of 20 ns.
  • the laser power withdrawn to ensure the harmonization function is almost negligible and will not cause any degradation of the performances of the active section of the equipment.
  • the photoluminescence lifetime of Erbium ions is important (greater than 1 msec), and therefore much greater than the duration of the laser pulse itself, which makes it a good wavelength transformer. but also a good pulse duration transformer.
  • the embodiment described here can be extended to other ions (Holmium, etc.) and to other laser wavelengths to adapt the conversion means to the conversion need. Since the photoluminescence intensities are large, it is also possible to cascade the types of photoluminescent material to obtain the desired emission band if a single photoluminescent material does not meet all the criteria (see the example given below).
  • a variant of the example of implementation of the conversion means described above consists in using a non-linear material with frequency conversion and a photoluminescent substance, the interaction between the excitation beam (FE) and the non-material linear generating a wave of wavelength less than that of the excitation beam, this wave being able to generate the photoluminescent emission of the luminescent substance.
  • a non-linear material doped with photoluminescent ions can be used.
  • a typical example is given by a Lithium Niobate crystal (LiNbO 3 ) doped with Erbium ions. Indeed, we know that this rare earth has a photoluminescence emission around 2.8 ⁇ m.
  • the absorption coefficient is lower at 1.06 ⁇ m than at 0.5 ⁇ m.
  • LiNbO 3 having a second order optical non-linearity it is possible to generate the second harmonic of 1.06 ⁇ m, or 0.532 ⁇ m. In this case, it is mainly the 0.532 ⁇ m wave that will excite the photoluminescence of the rare earth ion.
  • the crystal can be oriented relative to the incident FE excitation beam so as to check the phase tuning condition.
  • a variant consists in using two separate materials, one to perform the frequency conversion, the other to generate the photoluminescence in the desired band, we can then optimize the two interactions separately.
  • the observation path sensor can detect optical signals of short duration
  • a semiconductor material such as example that Indium Arsenide (InAs) or a more complex alloy for adapt the emission wavelength to the sensor.
  • Figure 5 shows photoluminescence emission (in arbitrary AU units) as a function of The wavelength.
  • Curve 51 thus represents an emission spectrum of the photoluminescence of InAs when it is excited by a pulse laser Nd: YAG (pulse width of about 10 ns).
  • the semiconductor can be used in massive form or in thin layer.
  • it can be implemented as a patch 61 in the center of a transparent window 62 for the near infrared and infrared. Indeed, this material being strongly absorbent at 1.06 ⁇ m, it it is preferable that the excitation beam does not pass through it before being focused for example by the mirror 21.
  • the photoluminescent materials can also cascade the types of photoluminescent materials to obtain the desired emission band if only one material photoluminescent does not meet all the criteria.
  • a first substance can be an Erbium doped material as described above, which, excited with a 1.06 ⁇ m pulse laser, emits around 2.8 ⁇ m with a life time close to a millisecond
  • a semiconductor material can be used, in a thin layer or in solid, absorbing at wavelength 2.8 ⁇ m and whose composition is adjusted to transmit exactly in the desired band.
  • the first one substance serves as a pulse duration transformer and the second serves as wavelength transformer.
  • FIG. 7 A variant of the device according to the invention is partially described in FIG. 7. This involves using a source 70 annexed to the LAS laser of the emission channel, emitting an FA beam (in solid line in FIG. 7), aligned by means of an alignment device 71 with the laser beam FL (in mixed dotted line in Figure 7). It is the beam FA which then forms the FE excitation beam incident on the conversion means according to means identical to those described above.
  • the annex source is independent of the emission laser, it can operate according to characteristics more favorable to the optimization of photoluminescence. For example, it can operate in long pulses or continuously, the emission wavelength of the additional source being close to that of emission laser so as not to have too severe constraints on the alignment of the two sources.
  • an additional source consisting of a semiconductor laser or a solid mini-laser pumped by diodes, emitting around 1 ⁇ m, can constitute the excitation beam of a photoluminescent material consisting for example of a semiconductor of InAs type as previously described.
  • the constraint on the emission wavelength of the auxiliary source is that it is shorter than that corresponding to the band gap of the semiconductor material used, when such material is used.
  • the alignment device comprises a cube separator 72, the separating surface of which is placed at 45 ° to the laser beam emission and beam from the auxiliary source, a deviation detector angular 73 receiving the two beams, which allows at any time to check for any angle difference between the two.
  • the alignment device can also include a diverter assembly 74 produced for example at using a motorized diasporameter assembly capable of realigning the two bundles in all conditions of use.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)

Claims (13)

  1. Vorrichtung zur Harmonisierung zwischen einem Emissionskanal, der einen einen Laserstrahl (FL) emittierenden Laser (LAS) aufweist, und einem einen Sensor (DET) aufweisenden, passiven Beobachtungskanal, wobei die Vorrichtung Mittel (MC) zur Umwandlung eines einfallenden Lichtstrahls in einen rückausbreitenden Strahl (FC) aufweist und dadurch gekennzeichnet ist, dass sie außerdem optische Mittel (MEL, 33) enthält, die es ermöglichen, gleichzeitig praktisch die Gesamtheit des Laserstrahls (FL) zum Emissionskanal und einen Anregungsstrahl (FE) zu den Umwandlungsmitteln (MC) zu schicken, der den einfallenden Strahl bildet und dessen Ausbreitungsrichtung und Divergenz mit denjenigen des Laserstrahls (FL) verbunden sind, dass die Umwandlungsmittel ein fotolumineszentes Material (22), das, wenn es auf der Wellenlänge des Anregungsstrahls angeregt wird, eine Strahlung emittiert, deren Wellenlänge im Spektralband des Sensors (DET) liegt, sowie eine optische Einheit (21) enthalten, die es ermöglicht, den Anregungsstrahl (FE) im fotolumineszenten Material zu fokussieren und mindestens einen Teil der emittierten Strahlung zu sammeln, um den rückausbreitenden Strahl (FC) zu bilden, und dass sie außerdem optische Mittel aufweist, um den rückausbreitenden Strahl (FC) zum Sensor zu schicken, wodurch die Harmonisierungsfehler in Echtzeit lokalisiert werden können.
  2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass, da der Laserstrahl (FL) des Emissionskanals im wesentlichen kollimiert ist, die Umwandlungsmittel (MC) sich wie eine Kubusecke verhalten, den im wesentlichen kollimierten Anregungsstrahl (FE) parallel zum Laserstrahl (FL) empfangen und den rückausbreitenden Strahl (FC) parallel zum Anregungsstrahl zurückschicken.
  3. Vorrichtung nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass das fotolumineszente Material (22) einen mit fotolumineszenten Ionen dotierten Feststoff aufweist.
  4. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, dass, da die Wellenlänge des Anregungsstrahls zum Spektralband des sichtbaren/nahen-Infrarotbereichs gehört, die fotolumineszenten Ionen Erbiumionen sind.
  5. Vorrichtung nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass das fotolumineszente Material (22) ein nichtlineares Material mit Frequenzumwandlung und eine fotolumineszente Substanz enthält, wobei die Wechselwirkung zwischen dem Anregungsstrahl (FE) und dem nichtlinearen Material eine Welle mit einer Wellenlänge erzeugt, die kürzer ist als die des Anregungsstrahls, wobei diese Welle die fotolumineszente Emission der Substanz erzeugen kann.
  6. Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, dass, da die Wellenlänge des Anregungsstrahls in der Größenordnung von 1,06 µm liegt und die fotolumineszente Substanz Erbiumionen enthält, das nichtlineare Material eine Nichtlinearität der Größenordnung 2 hat, wobei die Wechselwirkung zwischen dem Anregungsstrahl und dem nichtlinearen Material zu einer Frequenzdopplung führt.
  7. Vorrichtung nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass das fotolumineszente Material (22) ein Halbleitermaterial enthält, wobei die Wellenlänge des Anregungsstrahls kürzer ist als diejenige, die dem verbotenen Band des Halbleitermaterials entspricht.
  8. Vorrichtung nach Anspruch 7, dadurch gekennzeichnet, dass der Halbleiter von der Art Indiumarsenid (InAs) ist.
  9. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das fotolumineszente Material (22) zwei fotolumineszente Substanzen enthält, wobei die erste vom Anregungsstrahl (FE) erregt wird, um eine fotolumineszente Emission zu erzeugen, und die zweite durch die Emission der ersten erregt wird.
  10. Vorrichtung nach Anspruch 9, dadurch gekennzeichnet, dass, da der Anregungsstrahl (FE) von einem Impulslaser stammt, die Fotolumineszenz-Lebensdauer der ersten Substanz größer ist als die Impulsdauer des Lasers und das Fotolumineszenz-Emissionsspektrum der zweiten Substanz zumindest teilweise das Empfindlichkeits-Spektralband des Sensors (DET) des Beobachtungskanals abdeckt.
  11. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Anregungsstrahl (FE) ein Bruchteil des Laserstrahls (FL) des Emissionskanals ist.
  12. Vorrichtung nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, dass sie weiter eine Nebenquelle (70) des Lasers (LAS) des Emissionskanals, die einen Strahl (FA) emittiert, und ein System (71) zur fluchtenden Ausrichtung des Strahls (FA) mit dem Strahl (FL) des Laser-Emissionskanals aufweist, und dass der Anregungsstrahl (FE) ein Bruchteil des Strahls (FA) ist.
  13. System zur lasergeführten Zielbezeichnung, das insbesondere einen optischen Kollimatorkopf (VIS) zur Ausrichtung der Kollimationslinie aufweist, der aus mindestens einer afokalen Vorrichtung (AFO) für einen Laser-Emissionskanal und einem passiven Beobachtungskanal besteht, der einen Detektor (DET) aufweist, wobei das System Mittel zur Korrektur möglicher Harmonisierungsfehler zwischen den beiden Kanälen aufweist und dadurch gekennzeichnet ist, dass es außerdem eine Vorrichtung zur Harmonisierung des Laser-Emissionskanals und des passiven Kanals nach einem der vorhergehenden Ansprüche aufweist, wobei die Vorrichtung es ermöglicht, die Harmonisierungsfehler zu lokalisieren, die so von den Korrekturmitteln korrigiert werden können.
EP99402413A 1998-10-06 1999-10-01 Vorrichtung zur Justierung eines Lasersendungskanals mit einem passiven Beobachtungskanal Expired - Lifetime EP0992759B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9812498A FR2784185B1 (fr) 1998-10-06 1998-10-06 Dispositif pour l'harmonisation entre une voie d'emission laser et une voie passive d'observation
FR9812498 1998-10-06

Publications (2)

Publication Number Publication Date
EP0992759A1 EP0992759A1 (de) 2000-04-12
EP0992759B1 true EP0992759B1 (de) 2004-03-24

Family

ID=9531243

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99402413A Expired - Lifetime EP0992759B1 (de) 1998-10-06 1999-10-01 Vorrichtung zur Justierung eines Lasersendungskanals mit einem passiven Beobachtungskanal

Country Status (5)

Country Link
US (1) US6307623B1 (de)
EP (1) EP0992759B1 (de)
DE (1) DE69915758T2 (de)
FR (1) FR2784185B1 (de)
IL (1) IL132215A (de)

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IL133835A (en) * 1999-12-30 2003-10-31 Rafael Armament Dev Authority In-flight boresight
WO2001055684A2 (en) * 2000-01-25 2001-08-02 Lambda Physik Ag Energy monitor for molecular fluorine laser
FR2814281B1 (fr) * 2000-09-19 2003-08-29 Thomson Lcd Matrice active tft pour capteur optique comportant une couche semi-conductrice photosensible, et capteur optique comportant une telle matrice
FR2816118B1 (fr) * 2000-10-27 2003-01-31 Thomson Csf Dispositif pour l'harmonisation entre une voie d'emission laser et une voie passive d'observation
FR2830339B1 (fr) * 2001-10-02 2003-12-12 Thales Sa Dispositif optronique de veille passive
US7047801B2 (en) * 2004-04-30 2006-05-23 Raytheon Company Portable guidance assembly test station
US7310153B2 (en) 2004-08-23 2007-12-18 Palo Alto Research Center, Incorporated Using position-sensitive detectors for wavelength determination
US7522786B2 (en) 2005-12-22 2009-04-21 Palo Alto Research Center Incorporated Transmitting light with photon energy information
US7433552B2 (en) 2005-12-22 2008-10-07 Palo Alto Research Center Incorporated Obtaining analyte information
US8437582B2 (en) 2005-12-22 2013-05-07 Palo Alto Research Center Incorporated Transmitting light with lateral variation
US7315667B2 (en) * 2005-12-22 2008-01-01 Palo Alto Research Center Incorporated Propagating light to be sensed
US7718948B2 (en) * 2006-12-04 2010-05-18 Palo Alto Research Center Incorporated Monitoring light pulses
US8821799B2 (en) 2007-01-26 2014-09-02 Palo Alto Research Center Incorporated Method and system implementing spatially modulated excitation or emission for particle characterization with enhanced sensitivity
US9164037B2 (en) 2007-01-26 2015-10-20 Palo Alto Research Center Incorporated Method and system for evaluation of signals received from spatially modulated excitation and emission to accurately determine particle positions and distances
FR2921149B1 (fr) * 2007-09-14 2009-11-06 Thales Sa Procede de telemetrie sur image stabilisee
US8320983B2 (en) 2007-12-17 2012-11-27 Palo Alto Research Center Incorporated Controlling transfer of objects affecting optical characteristics
US8629981B2 (en) 2008-02-01 2014-01-14 Palo Alto Research Center Incorporated Analyzers with time variation based on color-coded spatial modulation
US8373860B2 (en) 2008-02-01 2013-02-12 Palo Alto Research Center Incorporated Transmitting/reflecting emanating light with time variation
FR2931559B1 (fr) * 2008-05-20 2010-08-27 Thales Sa Source d'imagerie a 1,5 micron et dispositif d'imagerie integrant la source
DE102009019700A1 (de) * 2009-05-05 2010-12-09 Deutsches Zentrum für Luft- und Raumfahrt e.V. Vorrichtung zur Lagebestimmung von Fahrzeugen
WO2012177449A1 (en) * 2011-06-20 2012-12-27 Bae Systems Information And Electronic Systems Integration Inc System and method for using a portable near ir led light source and photogrammetry for boresight harmonization of aircraft and ground vehicle components
US9029800B2 (en) 2011-08-09 2015-05-12 Palo Alto Research Center Incorporated Compact analyzer with spatial modulation and multiple intensity modulated excitation sources
US8723140B2 (en) 2011-08-09 2014-05-13 Palo Alto Research Center Incorporated Particle analyzer with spatial modulation and long lifetime bioprobes
EA028638B1 (ru) * 2015-11-30 2017-12-29 Открытое Акционерное Общество "Пеленг" Прицел-прибор наведения

Family Cites Families (83)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3977763A (en) 1972-06-07 1976-08-31 Thomson-Csf Coupling device for an optical waveguide and a method for manufacturing such a device
FR2193990B1 (de) 1972-07-25 1976-01-16 Thomson Csf Fr
US4077113A (en) 1974-06-14 1978-03-07 Thomson-Csf Method of manufacturing an electro-optical switch
FR2299662A1 (fr) 1974-06-14 1976-08-27 Thomson Csf Commutateur electro-optique et procede de fabrication d'un tel commutateur
US4198116A (en) 1975-04-30 1980-04-15 Thomson-Csf Electro-optical switch and modulator
FR2379086A1 (fr) 1977-01-31 1978-08-25 Thomson Csf Dispositif optique de transmission guidee a commande electrique
FR2385114A1 (fr) 1977-03-23 1978-10-20 Thomson Csf Dispositif optique non lineaire en couche mince et son procede de fabrication
FR2399736A1 (fr) 1977-08-05 1979-03-02 Thomson Csf Procede de fabrication d'une structure electro-optique comportant une electrode integree et composant optoelectronique utilisant ladite structure
FR2409518A1 (fr) 1977-11-22 1979-06-15 Thomson Csf Gyrometre interferometrique a laser
FR2410884A1 (fr) 1977-11-30 1979-06-29 Thomson Csf Dispositif de raccordement a une ligne bus optique et ligne bus comprenant un tel dispositif
FR2417866A1 (fr) 1978-02-17 1979-09-14 Thomson Csf Laser multiple a resonateur distribue
FR2424674A1 (fr) 1978-04-25 1979-11-23 Thomson Csf Circuit optique integre de demultiplexage
FR2453426A1 (fr) 1979-04-03 1980-10-31 Thomson Csf Modulateur d'intensite lumineuse en optique integree et circuit optique integre comportant un tel modulateur
FR2457505A1 (fr) 1979-05-23 1980-12-19 Thomson Csf Modulateur d'intensite lumineuse a commande numerique en optique integree et convertisseur numerique analogique comprenant un tel modulateur
FR2460582A1 (fr) 1979-06-29 1981-01-23 Thomson Csf Hydrophone a fibre optique monomode fonctionnant par effet elasto-optique
FR2461956A1 (fr) 1979-07-24 1981-02-06 Thomson Csf Dispositif interferometrique de mesure de courant electrique a fibre optique
FR2465243A1 (fr) 1979-09-06 1981-03-20 Thomson Csf Commutateur electro-optique a commande electrique et circuit optique integre comprenant un tel commutateur
FR2471617A1 (fr) 1979-12-14 1981-06-19 Thomson Csf Dispositif optique non lineaire a guide d'onde composite et source de rayonnement utilisant un tel dispositif
FR2471595B1 (de) 1979-12-14 1982-12-31 Thomson Csf
FR2474694B1 (de) 1980-01-29 1983-09-02 Thomson Csf
FR2490835A1 (fr) 1980-08-29 1982-03-26 Thomson Csf Structure optique integree a couplage directionnel conforme
FR2492116A1 (fr) 1980-10-10 1982-04-16 Thomson Csf Jonction optique hybride et application a un dispositif interferometrique en anneau
FR2555739B1 (fr) 1980-11-07 1986-04-04 Thomson Csf Dispositif de mesure d'un dephasage non reciproque engendre dans un interferometre en anneau
US4422758A (en) * 1981-07-24 1983-12-27 The United States Of America As Represented By The Secretary Of The Army Boresighting of airborne laser designation systems
FR2515811A1 (fr) 1981-11-03 1983-05-06 Thomson Csf Dispositif interferometrique de mesure de champ magnetique et capteur de courant electrique comportant un tel dispositif
FR2516232B1 (fr) 1981-11-09 1986-02-21 Thomson Csf Interferometre de type michelson a miroir photorefractif
FR2533714A1 (fr) 1982-09-28 1984-03-30 Thomson Csf Dispositif coupleur optique integre non lineaire et oscillateur parametrique comprenant un tel dispositif
FR2548393B1 (fr) 1983-06-17 1986-11-21 Thomson Csf Dispositif polariseur optique integre et son procede de fabrication
GB2165957B (en) * 1984-10-18 1988-05-25 Ferranti Plc Checking aiming apparatus alignment
FR2573547B1 (fr) 1984-11-16 1987-04-10 Thomson Csf Source optique monomode et dispositif amplificateur optique accordables dans le proche infra-rouge et l'application aux dispositifs amplificateurs selectifs et de regeneration
FR2579774B1 (fr) 1985-03-26 1988-07-08 Thomson Csf Dispositif optique integre de conversion de polarisation optique
FR2588093B1 (fr) 1985-09-27 1987-11-20 Thomson Csf Polariseur par absorption differentielle, son procede de realisation et dispositif mettant en oeuvre ledit procede
FR2596529B1 (fr) 1986-03-28 1988-05-13 Thomson Csf Guide d'onde optique en materiau semiconducteur, laser appliquant ce guide d'onde et procede de realisation
FR2609560B1 (fr) 1987-01-09 1990-11-23 Thomson Csf Films de langmuir-blodgett utilisables en optique non lineaire
FR2615006B1 (fr) 1987-05-04 1991-10-04 Thomson Csf Guide d'onde optique integre, son procede de fabrication, et son utilisation dans un modulateur electro-optique
FR2616272B1 (fr) 1987-06-02 1990-10-26 Thomson Csf Dispositif en materiaux semiconducteurs realise sur un substrat de parametre de maille different, application a un laser et procede de realisation
FR2618273B1 (fr) 1987-07-17 1994-06-17 Thomson Csf Modulateur/commutateur electro-optique integre a reponse passe-bande.
FR2618278B1 (fr) 1987-07-17 1989-12-01 Thomson Csf Correlateur a fibre optique.
FR2618221B1 (fr) 1987-07-17 1991-07-19 Thomson Csf Detecteur d'onde electromagnetique et analyseur d'image comportant un tel detecteur.
FR2619936B1 (fr) 1987-09-01 1989-12-01 Thomson Csf Modulateur pour onde electromagnetique, a puits quantiques, et utilisation de ce modulateur comme polariseur
FR2619938B1 (fr) 1987-09-01 1989-12-01 Thomson Csf Translateur de frequence pour onde du domaine infrarouge moyen
FR2620863B1 (fr) 1987-09-22 1989-12-01 Thomson Csf Dispositif optoelectronique a base de composes iii-v sur substrat silicium
FR2622706B1 (fr) 1987-11-03 1992-01-17 Thomson Csf Dispositif d'interconnexion optique dynamique pour circuits integres
FR2637092B1 (fr) 1988-05-11 1991-04-12 Thomson Csf Modulateur d'onde electromagnetique a puits quantiques couples, et application a un detecteur d'onde electromagnetique
FR2640438B1 (fr) 1988-12-09 1991-01-25 Thomson Csf Procede de realisation de lasers semi-conducteurs et lasers obtenus par le procede
FR2642858B1 (fr) 1989-02-09 1991-04-12 Thomson Csf Dispositif optique de traitement d'une onde optique, son procede de realisation et un doubleur de frequence
FR2647973B1 (fr) 1989-05-30 1991-08-16 Thomson Csf Lasers de puissance pompes par diodes lasers
FR2648962B1 (fr) 1989-06-23 1994-09-09 Thomson Csf Structure d'illumination d'un barreau laser, a sources optiques defocalisees
US5047638A (en) * 1989-06-28 1991-09-10 Cameron Jeffery A Passive boresighting system
FR2649536B1 (fr) 1989-07-04 1994-07-22 Thomson Csf Detecteur d'ondes electromagnetiques
FR2649548B1 (fr) 1989-07-06 1994-08-26 Thomson Csf Laser solide a longueur d'onde d'emission 0,5-0,65 micrometres
FR2649833A1 (fr) 1989-07-11 1991-01-18 Thomson Csf Source laser de puissance accordable
FR2652685B1 (fr) 1989-10-03 1991-12-06 Thomson Csf Source laser de puissance a commande optique de balayage de faisceau.
FR2655461B1 (fr) 1989-12-01 1992-11-27 Thomson Csf Source optique miniature et procede de realisation.
FR2655486B1 (fr) 1989-12-01 1994-08-26 Thomson Csf Dispositif laser a longueur d'onde elevee.
FR2658307A1 (fr) 1990-02-13 1991-08-16 Thomson Csf Guide d'onde optique integre et procede de realisation.
FR2660493A1 (fr) * 1990-03-30 1991-10-04 Thomson Csf Dispositif laser a changeur de frequence integre de facon monolithique.
FR2661784B1 (fr) 1990-05-02 1992-07-03 Thomson Csf Laser de puissance a miroir actif.
FR2663787B1 (fr) 1990-06-26 1997-01-31 Thomson Csf Detecteur d'ondes electromagnetiques.
FR2666699A1 (fr) 1990-09-11 1992-03-13 Thomson Csf Laser a guides optiques couples.
FR2667207B1 (fr) 1990-09-21 1993-06-25 Thomson Csf Convertisseur de frequences lumineuses.
FR2669126B1 (fr) 1990-11-09 1993-01-22 Thomson Csf Systeme de visualisation d'images fournies par un modulateur spatial avec transfert d'energie.
FR2669427B1 (fr) * 1990-11-16 1993-01-22 Thomson Csf Dispositif de controle d'alignement de deux voies optiques et systeme de designation laser equipe d'un tel dispositif de controle.
FR2671237B1 (fr) 1990-12-28 1995-03-31 Thomson Csf Laser solide de grande energie.
FR2674081B1 (fr) 1991-03-15 1994-10-07 Thomson Csf Systeme de communication optique entre stations mobiles et procede de communication correspondant.
FR2675949B1 (fr) 1991-04-25 1993-07-09 Thomson Csf Modulateur d'ondes et detecteur optique a puits quantiques.
FR2676853B1 (fr) 1991-05-21 1993-12-03 Thomson Csf Procede d'ecriture et de lecture optique sur support d'informations a stockage haute densite.
FR2679050B1 (fr) 1991-07-09 1994-08-26 Thomson Csf Dispositifs d'optique non lineaire.
FR2680751A1 (fr) 1991-09-03 1993-03-05 Thomson Csf Procede d'evitement des collisions pour des porteurs cooperatifs et ensemble optique embarque destine a sa mise en óoeuvre.
FR2681738B1 (fr) 1991-09-24 1993-11-05 Thomson Csf Lasers de puissance a filtre semiconducteur.
FR2681737A1 (fr) 1991-09-24 1993-03-26 Thomson Csf Source monofrequence de puissance a fibre optique.
FR2682791B1 (fr) 1991-10-18 1995-04-28 Thomson Csf Procede d'evitement des collisions entre aeronefs et ensemble optique destine a sa mise en óoeuvre.
FR2684772B1 (fr) 1991-12-10 1994-08-26 Thomson Csf Reseau d'indice optique commandable electriquement.
FR2686431A1 (fr) 1992-01-21 1993-07-23 Thomson Csf Doubleur de frequence optique utilisant des structures quantiques semiconductrices.
FR2689251B1 (fr) 1992-03-27 1994-08-26 Thomson Csf Dispositif de télémétrie et son application à un système de détection d'obstacles.
FR2696874B1 (fr) 1992-10-13 1994-12-09 Thomson Csf Modulateur d'onde électromagnétique à puits quantiques.
GB9309750D0 (en) * 1993-05-12 1993-07-21 Pilkington Perkin Elmer Ltd Method of monitoring coalignment of a sighting or surveilance sensor suite
FR2715776B1 (fr) 1994-01-28 1996-03-01 Thomson Csf Semiconducteurs Laser de grande puissance à deux étages.
FR2718539B1 (fr) 1994-04-08 1996-04-26 Thomson Csf Dispositif d'amplification de taux de modulation d'amplitude d'un faisceau optique.
FR2722307B1 (fr) 1994-07-05 1996-08-14 Thomson Csf Source optique compacte, basee sur le doublage de frequence d'un laser
FR2725081B1 (fr) 1994-09-23 1996-11-15 Thomson Csf Source optique compacte, basee sur le doublage de frequence d'un laser et auto-stabilisee par depeuplement de la pompe
FR2728697B1 (fr) 1994-12-23 1997-01-24 Thomson Csf Convertisseur de frequence a tres haute efficacite, en optique guidee
FR2749721B1 (fr) 1996-06-07 1998-11-27 Thomson Csf Commutateur electrique a photoconducteur

Also Published As

Publication number Publication date
FR2784185A1 (fr) 2000-04-07
US6307623B1 (en) 2001-10-23
FR2784185B1 (fr) 2001-02-02
DE69915758D1 (de) 2004-04-29
EP0992759A1 (de) 2000-04-12
IL132215A0 (en) 2001-03-19
DE69915758T2 (de) 2005-02-24
IL132215A (en) 2003-01-12

Similar Documents

Publication Publication Date Title
EP0992759B1 (de) Vorrichtung zur Justierung eines Lasersendungskanals mit einem passiven Beobachtungskanal
EP0511346B1 (de) Ausrichtungskontrollvorrichtung und ihre verwendung
EP1949055B1 (de) Optische heterodyne-sampling-einrichtung
JP2015526741A (ja) 長波長赤外線の検出および長波長赤外光源を用いた画像処理
US11644418B2 (en) Far-infrared light source and far-infrared spectrometer
FR3058012A1 (fr) Systeme combine d'imagerie et de communication par signaux laser
FR2976132A1 (fr) Procede et dispositif de generation d'impulsions attosecondes isolees.
Bruneau et al. A new lidar design for operational atmospheric wind and cloud/aerosol survey from space
EP2147487B1 (de) Gepulster microchip-laser
US9733431B2 (en) Noise reduction device and detection apparatus including same
EP0702246B1 (de) Tragbares Gerät zum Messen der Rückstreuung von Licht
FR2518763A1 (fr) Ensemble de visee et de pointage jour-nuit
FR2996000A1 (fr) Installation de mesures spectroscopiques a partir d'un plasma induit par laser
FR2740227A1 (fr) Dispositif de detection tomoscopique laser
BE1026154B1 (fr) Système optique
FR2689252A1 (fr) Dispositif laser pour poursuivre et brouiller un missile autoguidé par rayonnement infrarouge.
Ageorges et al. Atmospheric sodium monitor for laser guide star adaptive optics
FR3059156B1 (fr) Module de detection optique
Fastig et al. Multispectral lidar system: design, build, and test
Im et al. Experimental evaluation of the performance of pulsed two-color laser-ranging systems
FR2728971A1 (fr) Telemetre discret multifonctionnel
EP0718600B1 (de) Messvorrichtung für die Winkelposition eines beweglichen Teiles, insbesondere einer Antenne, mit Bezug auf ein anderes mechanisches Teil
WO2024002965A1 (fr) Système de détermination de l'atténuation d'une onde lumineuse traversant un volume d'échantillonnage
EP0559549A1 (de) Vorrichtung zur optoelektronischen Detektion mit Verwendung der optischen Amplifikation, und Anwendung bei Telemetrie und Winkelabweichungsmessung
EP2708862A1 (de) Optischer Wellenfrontanalysator

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR GB IT

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

17P Request for examination filed

Effective date: 20000816

AKX Designation fees paid

Free format text: DE FR GB IT

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: THALES

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REF Corresponds to:

Ref document number: 69915758

Country of ref document: DE

Date of ref document: 20040429

Kind code of ref document: P

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20040628

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20041228

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 18

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 19

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20180928

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20180920

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20180918

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20181018

Year of fee payment: 20

REG Reference to a national code

Ref country code: DE

Ref legal event code: R071

Ref document number: 69915758

Country of ref document: DE

REG Reference to a national code

Ref country code: GB

Ref legal event code: PE20

Expiry date: 20190930

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20190930

P01 Opt-out of the competence of the unified patent court (upc) registered

Effective date: 20230529