WO2018149577A1 - Dispositif d'exposition à un rayonnement comprenant une unité de rayonnement de pompage et un élément de conversion - Google Patents

Dispositif d'exposition à un rayonnement comprenant une unité de rayonnement de pompage et un élément de conversion Download PDF

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Publication number
WO2018149577A1
WO2018149577A1 PCT/EP2018/050872 EP2018050872W WO2018149577A1 WO 2018149577 A1 WO2018149577 A1 WO 2018149577A1 EP 2018050872 W EP2018050872 W EP 2018050872W WO 2018149577 A1 WO2018149577 A1 WO 2018149577A1
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WIPO (PCT)
Prior art keywords
radiation
irradiation
unit
sensor unit
pump radiation
Prior art date
Application number
PCT/EP2018/050872
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German (de)
English (en)
Inventor
Andre Nauen
Oliver Woisetschlaeger
Frank Buchmann
Oliver Hering
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Osram Gmbh
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Publication date
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Publication of WO2018149577A1 publication Critical patent/WO2018149577A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q11/00—Arrangement of monitoring devices for devices provided for in groups B60Q1/00 - B60Q9/00
    • B60Q11/005—Arrangement of monitoring devices for devices provided for in groups B60Q1/00 - B60Q9/00 for lighting devices, e.g. indicating if lamps are burning or not
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/176—Light sources where the light is generated by photoluminescent material spaced from a primary light generating element
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
    • F21S45/70—Prevention of harmful light leakage
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
    • F21S41/67—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on reflectors
    • F21S41/675—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on reflectors by moving reflectors

Definitions

  • the present invention relates to an irradiation device with a pump radiation unit for emitting pump radiation and a conversion element for at least partial conversion thereof into a conversion radiation.
  • a conversion element also referred to as a phosphor element, irradiated with pump radiation, which is thereby converted into a conversion radiation of other spectral composition.
  • the pump radiation can be, for example, blue light, wherein, in the case of a so-called version.
  • ⁇ jointly may result as a conversion radiation in a mixture of white light not proportionally converted blue light with yellow light ge.
  • the pump radiation unit typically a laser, and the conversion element are arranged at a distance from one another, with which an irradiation device of high beam or luminance can be realized.
  • a more recent field of application is the street illumination with a motor vehicle headlight, which illustrates the present subject matter, but should not initially limit its generality. Presentation of the invention
  • the present invention is based on the technical problem of specifying a particularly advantageous irradiation device .
  • a Bestrahlungsvor- device which thus in addition to the pump radiation unit and the distance therefrom being arrange ⁇ th conversion element comprises a sensor unit for detecting a radiation power. Furthermore, the irradiation device is set up in such a way that, during operation of the pump radiation unit, an irradiation surface of the conversion element is irradiated with the pump radiation in a time-variable manner, not necessarily over the entire operation, but in any case temporarily (possibly during a measurement interval, see below in detail).
  • the sensor unit a certain surveil ⁇ monitoring of the conversion element.
  • This may, for example, affect its mechanical integrity, such as in the case of the aforementioned automotive applications, the Conversion element namely a considerable requirement profile ⁇ be exposed (temperature fluctuations, mechanical vibrations, etc.). Solves itself, for example, the mechanical attachment of the conversion element, so it falls z. B. from a carrier, this can be a critical error case.
  • the bundled pump radiation could then exit via an optics actually provided for dissipating the conversion radiation, which can represent a source of danger for an observer, namely can lead to damage to the retina and in the worst case loss of sight.
  • the partial conversion a little pump radiation but not bundled on ⁇ ground of scattering processes in the conversion element in the reform gel comes out even in normal operation.
  • the radiation power is further not only temporally integrated, but recorded time-resolved, in Ver ⁇ bond with the portable excitation.
  • This can, for example, be advantageous in as a comparison of the time-resolved measurement signal can be reversed enabling ortsaufgelös ⁇ te assignment of the measured signal with the location over time ⁇ variable excitation then.
  • the time-resolved measurement signal can be correlated therewith, for example, with a respective mirror position which can be derived from the mirror unit itself (its operating data) or also measured separately.
  • a first region of the irradiation surface is exposed to pump radiation. is radiated, one of them different second area but not, but which is inversely irradiated in a different from the first second time with pump radiation in which the first area is not irradiated, so a detected with the sensor unit in the first time ⁇ point radiation power the assigned to the first area and the radiation power detected at the second time the second area.
  • conversion radiation is only emitted there where it is excited by pumping radiation.
  • a respective region can be assigned or matched to a respective mirror position.
  • the spatial resolution can thereby be advantageously obtained from the time-resolved measurement signal, so it must, for example. Does not move the sensor unit on the conversion element, so this "scanned" in the survey who ⁇ .
  • the conversion element and the Sen ⁇ sor bain are fixed in position relative to each other, so another in a static arrangement, resulting in a mechanically simple and robust design permits.
  • the spatial resolution nevertheless gained on the other hand, for example. respects ⁇ Lich an early detection of a failure of interest.
  • damage to the Konversionsele- can ment, which then possibly in a complete waste Mün ⁇ det announce by local cracking.
  • the conversion element may, for example with cerium doped yttrium aluminum garnet (YAG: Ce). As a phosphor aufwei ⁇ sen. Irrespective of the phosphor used in detail, it may also be provided in particle form in the conversion element, in which case the particles may then be embedded, for example, in a matrix material. On the other hand, ⁇ can also be a Einkris ⁇ tall the phosphor material, the conversion element.
  • a dichroic coating can be arranged at the irradiation and / or the emission surface of the conversion element, which is transmissive depending on the predominantly only for the pumping or the conversion radiation, but reflective for the respective other radiation.
  • the entire area of the conversion element which is exposed to pump radiation over the operation, ie in the temporal integral, with pump radiation or conversion radiation is considered to be the "incident surface” or "emission surface” of a possibly larger side surface of the conversion element.
  • the "Sensoreinaji” at least includes a sensor, which is, for example, may be a single photodiode or an array thereof, as well as a CCD or CMOS image sensor.
  • the evaluation unit (s) may preferably have a comparatively high sampling rate, for example in the range of at least 1 kHz, 10 kHz or 100 kHz, with possible upper limits at 100 GHz, 10 GHz or 1 GHz
  • a cycle time could result, for example, from the size of a pump radiation spot (has, for example, 20 ⁇ m), which in the case of an irradiation area having a height or width of, for example, 10 mm has a clock frequency of 5 GHz (at 100 Hz MEMS Mirror) and would be technically feasible.
  • the path length can also be based on multiples (eg 2 or 3 times) of the size of the pump radiation spot, which correspondingly reduces the clock rate.
  • the "radiation power" is detected indirectly with the sensor unit to ⁇ minimum and fed as measurement signal of the Auswer ⁇ tevenez; it can also be any other technical lighting ⁇ African size, which can at least supply a qualitative, preferably quantitative conclusion on the radiation power, are evaluated,
  • the radiation preferably passes directly from the irradiation and / or emission surface to the sensitive sensor surface, if necessary from an interposed bandpass filter (highpass or lowpass filter, see below for definition) with the radiation falling on the sensitive sensor surface in any case partially implemented in the measurement signal.
  • the sensor inputs namely disposed opposite usually instead, one oblique to the radiating and / or
  • For the irradiation surface "looking" sensor unit preferably, on the sensitive sensor surface according to the Lambertian radiation characteristic of both the pump radiation and the conversion radiation falls a small part of the radiation.
  • the angle can, for example, be chosen so that the radiation incident on the sensor surface still has a radiant intensity which makes 1 / e or 1 / e 2 a maximum radiant intensity;
  • the pumping and conversion radiation is typi- It is usually based on those whose radiant intensity is lower at the oblique angles.
  • the sensor surface of the single-jet and / or the emitting surface may be associated with the two surfaces are present under the generic term "reflecting surfaces" summarized.
  • the conversion element in Re ⁇ flexion can be operated, wherein said single-beam and the radiating then coincide, can be and, for example, on the opposite rear surface. a mirror angeord- net.
  • the sensor unit could then the a ⁇ beam and the emitting surface be assigned the same time, thus the two reflecting surfaces.
  • an operation preferably in transmission wherein the single-jet and the radiating surface of the conversion element are opposite to each other.
  • one of the input surface associated sensor unit an arrangement would generally be thinking ⁇ bar, but preferably one of the radiating surface is supplied ⁇ ordered arrangement.
  • the "Zumersein" such that at the respective Strahlflä- che emitted radiation a falls on the sensitive sensor surface.
  • the pump radiation unit includes as the beam source before Trains t ⁇ a laser source that can be constructed for example from a plurality of individual laser sources, the single bundle of rays may, for example, are superimposed with a Stahlkompressi ⁇ onsoptik.
  • a laser source or single laser source a laser diode is preferred.
  • op ⁇ table effectively a volume of fluid, preferably a gas volume, particularly preferably air;
  • Such a structure is also called a "LARP arrangement" (Laser Activated Remote Phosphor).
  • the radiation of the irradiation surface that is "spatially variable over time” means that the power of the pump radiation (per region) varies over time in several mutually different regions, and this does not necessarily have to be simultaneous for the regions
  • the irradiation may preferably be due to a pump radiation spot passing over the irradiation surface
  • the pumping radiation is guided onto the irradiation surface by means of a tiltable mirror (also referred to as MEMS mirror) .
  • the irradiation surface can then be "scanned" to a certain extent with the pump radiation, ie scanned with the pump radiation spot.
  • the time-resolved measurement signal can also then allow ei ⁇ nen conclusion; conversely, the above-described spatially resolved evaluation is not intended to limit the main object of the claim, but one of various, within the scope of the dependent claims each to illustrate in concrete terms possible applications of time-resolved recording.
  • the sensor unit has at least two sensors, preferably exactly two sensors.
  • the sensors are preferably assigned to the irradiation and / or the emission surface in such a way that they detect them at different angles of rotation. This means that the sensors are rotated relative to each other with respect to a revolution about an axis which passes through the center of the irradiation and / or emission surface (in the area centroid) and perpendicularly, ie include an angle taken over the axis, which, for example. may be at least 30 °, 50 ° or 70 ° and there ⁇ of independently, for example, not more than 150 °, 130 ° and 110 ° (increasingly in each case in the order of naming before ⁇ given).
  • the senor is based on the shortest connecting line from the centroid of the surface to its sensitive sensor surface to said axis.
  • the sensors can preferably be arranged on two adjoining side edges of the rectangle.
  • the incident and / or emission surface is detected from different directions, which may be of interest, for example, in the case of an irradiation surface scanned in the x and y directions with a pump radiation spot, for example because of a pump radiation guide via two mutually rotated MEMS mirrors then there is a certain sensitivity regarding both mirrors. Details of a corresponding evaluation are explained below. On the other hand, a corresponding sensor unit can however also help to improve the spatial resolution, in principle make them "flat".
  • the sensor unit is adapted to at least predominantly detect a radiation power in the spectral range of the pump radiation.
  • the radiation power is preferably detected exclu ⁇ Lich in this spectral range is thus detected vice versa no radiation power in the spectral range of the conversion radiation.
  • the spectral selection is preferably achieved by appropriate filtering components of a sensor vorlie ⁇ quietly with a high pass (refers to the frequency, that permits high frequencies / short wavelengths passie ⁇ ren).
  • the conversion is namely preferably a Dora conversion is reacted conversion radiation in a low-energy (furrwelli ⁇ ge) thus higher energy (kurzwelli ⁇ ge) pump radiation.
  • the short-wave or high-frequency pump radiation can pass the high pass and reach the sensitive sensor surface.
  • the sensor unit is adapted to detect at least predominantly a radiation power in the spectral range of the conversion radiation.
  • the radiation power is detected exclusively in this spectral range, so conversely, no radiation power is detected in the spectral range of the pump radiation.
  • this is again appropriately filtered, ie preferably with a low-pass filter (refers to the frequency, thus allowing low frequencies / long wavelengths to pass).
  • KS- Sensor unit a sensor unit for Erfas ⁇ sung predominantly in the field of pump radiation as
  • a possible case of failure of the conversion element may be its-converting properties, degradation or in the worst case the full Ver ⁇ loss. As a result, would at the emission, higher due to the verringer ⁇ th conversion, the proportion of pump radiation which can be a photo biological risk (see pros ne). This error case can be detected, for example, with a KS sensor unit via the reduced conversion radiation component.
  • Another error case may be a degradation or the loss of the scattering properties of the conversion element.
  • the pump radiation which is not proportionally converted in the case of the partial conversion, generally does not penetrate the conversion element as a rule, but due to scattering processes, the beam widening occurs.
  • a degradation of the scattering properties could result in the emergence of unscattered, collimated laser radiation, which may represent a considerable safety risk.
  • This error case can be detected, for example, at the emission surface with a PS sensor unit which, in the case of an alignment obliquely to the emission surface, would no longer receive pump radiation in the event of an error (this is no longer scattered by Lambertsch to the flat angles).
  • both a KS sensor unit also called “first sensor unit”
  • a PS sensor unit also called “second sensor unit”
  • the two just described fault cases can be reliably detected.
  • the KS sensor unit ve ⁇ be verified. If conversion radiation is still detected, it is possible, for example, to preclude damage to the pump radiation unit as an alternative cause.
  • the evaluation unit wherein the measurement signals are supplied from the PS and the KS sensor unit arranged for evaluating a Quo ⁇ tienten of the two measuring signals.
  • the measurement signal of the KS sensor unit is set in the numerator, and that of the PS sensor unit in the denominator.
  • the pump radiation unit with correspondingly about and placed under defined threshold values or a threshold interval, the respective error case fixed ⁇ and, for example, be turned off or dimmed.
  • the "look" preferably each sensor unit of differing ⁇ chen directions on the single-jet and / or radiating the PS-sensor unit and / or the KS-sensor unit. It is above the Both the PS and the KS sensor units are because at least two mutually twisted sensors constructed, preferably from exactly two sensors.
  • a quotient is then preferably evaluated in the evaluation, in whose counter the measurement signals of the sensors of a sensor unit are added to ⁇ , and in its denominator, the measurement signals of the sensors of the other Sensor unit are added up.
  • the counter can, for example, form the KS sensor unit, the denominator the PS sensor unit.
  • the evaluation unit is set up to use the time-resolved measurement signal to allocate the radiation power detected at different times to the areas of the irradiation and / or emission surface that are different from time-variable irradiation.
  • the irradiation apparatus has a spot moving unit, which is adapted for the pumping radiation spot for site ⁇ variable irradiation on the irradiation surface to be ⁇ .
  • spot moving unit which is adapted for the pumping radiation spot for site ⁇ variable irradiation on the irradiation surface to be ⁇ .
  • the spot movement unit is a tiltable mirror, via which the pump radiation is guided onto the irradiation surface.
  • the mirror is designed as a MEMS mirror, ie as a microsystem mirror, which is advantageous due to the compact size.
  • the mirror can be designed to be one-way or two-dimensionally deflecting, ie tiltable about one or two axes.
  • the irradiation surface can be scanned preferably flat (see forward), which can also be achieved with a combination of several mirrors (which are "connected in series” with respect to the Pumpstrah ⁇ lung path, eg. With zueinan- the orthogonally aligned oscillation axis) ,
  • the evaluation unit is set up to detect a defect of the spot movement unit, in particular of the tiltable mirror, on the basis of the measurement signal from a deviation of the time-resolved measured radiation power from a reference. Also in this respect, express reference is made to the above remarks.
  • the evaluation unit is set up to use a quotient of the signals measured with different sensors of the same sensor unit for the failure detection.
  • the sensors are twisted towards each other (see front).
  • a quotient of the measurement signals of the two mutually rotated sensors is evaluated.
  • a radiation device which is suitable for continuous operation. of the sweeping or scanning of the Einstrahl Structure is set up with the pump radiation spot, be ⁇ said quotient will then change continuously (not be constant). Regardless of the position of the pump radiation spot in detail, as a result of which movement, at least one of the measurement signals will change.
  • the evaluation unit can also be supplied with information about the power of the pump radiation unit over time, whereby the time-resolved measurement signal can be normalized, for example, power-dependent (with a normalization factor).
  • Preferred scan frequencies of a tiltable mirror can be, for example, at least 25 Hz , further and more preferably at least 50 Hz and 75 Hz, respectively; possible upper limits may (independently of this), for example, be at most 300 Hz, further and more preferably at most 250 Hz or 200 Hz.
  • a follow-powered conversion element may be preferred:
  • the pump radiation spot is moved periodically over the input surface, preferably with a ver ⁇ tilting mirror, wherein the pumping radiation power selec- tively, depending on the position of the spot on the Einstrahlflä ⁇ che, is adjusted.
  • the input surface a performance profile can be inscribed with the pump radiation which is either predefined or can also be adaptive depending on äuße ⁇ ren sizes.
  • the more pump radiation is introduced at one point of the radiation surface, the more conversion radiation (and possibly also proportionately unconverted pump radiation) is emitted at an opposite point of the emission surface (operation in transmission) or at the same point (reflection).
  • the radiating an Op tik is then assigned, in the simplest case, a lens or a lens system, which, for example reflects the radiating surface. Unend into ⁇ Liche. Radiation emitted at a respective point of the emission surface is then supplied to a respective solid angle region, ie, the local distribution is converted into a solid angle distribution.
  • a certain solid angle volume can be ⁇ lights up with the generated on the input surface Pumpstrahlungspro ⁇ fil so deliberately.
  • the opposite lane may be excluded from the illumination for dipped beam, but a light finger may be defined for the own lane.
  • Particularly preferred and advantageous may be an adaptive street illumination in which the pump radiation profile is adjusted, that is, for example, depending on the detected with a camera oncoming traffic or vehicles ahead of certain areas of the solid angle volume no light is supplied, ie corresponding points of the A ⁇ beam surface not or only reduced with pump radiation are supplied.
  • the pump radiation spot scans, for example, over the Einstrahl Type, and the pump radiation is selectively on or off or reduced (even if there are in places virtually no pump radiation spot in the sense of an actual radiation, is for simplicity on the on One- beam surface moved "spot" reference, the tat ⁇ sumbleliche irradiation on or off can be).
  • a presently described time-resolved detection or evaluation can be performed on the one hand during the ongoing operation of the irradiation device.
  • the pump radiation profile whether predefined or adap ⁇ tive, and also its development over time are known, so it can be calculated back to a spatial resolution.
  • an evaluation can also take place during ongoing operation with the quotient formation described above.
  • the irradiation device is, however, adapted to the portable Be ⁇ radiation of the irradiation surface during a Messinter- Valls start with a predefined irradiation profile ⁇ ver.
  • a line of the Einstrahl Structure with the pumping radiation spot can be driven off ⁇ ;
  • the pump radiation power can also vary predefined, preferably it is constant across the line. (See the above scan. Frequencies) can during Messin ⁇ tervalls multiple lines or the entire input surface can be scanned, and this can be a total nevertheless still below the human perception threshold.
  • the power in the measuring interval is preferably reduced, namely in the order of naming increasingly preferred at most 90%, 80% or 70% thereof (with possible lower limits of at least 20%, 30%, 40% or 50%).
  • the irradiation device is set up to switch on a corresponding measuring interval between ⁇ during the ongoing operation at intervals. So far as in general the measuring interval, for example, in a switch-on and / or switch-off, ie outside of the actual operation, can be placed, it is preferably integrated in the latter.
  • the application of the conversion radiation ie, for example, is used to illuminate the road, a measurement interval is then embedded at certain intervals.
  • the measuring interval may, for example, have a duration of at most 100 ms, 50 ms or 10 ms, with possible lower limits (independently thereof) being able to lie, for example, at least 1 ms or 5 ms.
  • Different measuring intervals can be integrated, which, for example, also result randomly distributed or can be adapted accordingly to the current operation; preferably de ⁇ CKEN the different measurement intervals in sum then the entire single-beam and / or radiating from.
  • the invention also relates to a method of operating a presently disclosed irradiation apparatus, the irradiation surface is spatially varying irradiated with the pumping radiation and with the sensor unit reflecting surface which Strah ⁇ lung power at the input surface and / or the waste is measured with time resolution. It is from ⁇ expressly also referred to the remainder of the disclosure; So far as, for example, an irradiation device or an evaluation unit is mentioned that is "set up" for certain processes, the disclosure also refers to a corresponding operating method.
  • the invention also relates to the use of a presently disclosed irradiation device for illumination, in particular for automotive lighting, in particular for automotive exterior lighting, preferably in a headlight.
  • the motor vehicle (motor vehicle) is preferably an automobile.
  • a light source of high luminance is provided which, for example, the long distance, but also form the low beam and can support, wherein the sensor unit to monitor the mechanical integrity or the optical security and so high secure ⁇ uniform standards ensure helps.
  • Particularly preferred is an application of the irradiation device in the field of adaptive street illumination, cf. also the comments above.
  • FIG. 1 shows an inventive irradiation device with pump radiation unit, conversion element and sensor unit in a schematic representation
  • FIG. 2 shows the conversion element of the irradiation device according to FIG. 1 in a plan view
  • FIG. 3 shows time-resolved measurement signals acquired with the sensor units of the arrangement according to FIG. 2;
  • FIG. 4 shows filter curves of filters of the sensor units of FIG. 4
  • FIG. 1 shows a radiation device 1 according to the invention in a schematic side view.
  • a pump radiation unit 2 namely a Laserquel ⁇ le (laser diode), the pump radiation emitted 3, vorlie ⁇ ing blue laser radiation.
  • a spot movement unit 4 namely a tiltable mirror (MEMS mirror)
  • the pump radiation 3 passes to a Kon ⁇ version element 5, namely on a Einstrahl
  • the conversion element 5 comprises cerium-doped yttrium aluminum garnet (YAG: Ce) as the phosphor in which the pump radiation 3 (blue laser light) are converted into a proportionally longer wavelength conversion radiation 7, vorlie ⁇ quietly yellow light.
  • the conversion radiation 7 is ⁇ given thing in common with proportionately unconverted pump radiation at one of the input surface 6 opposite radiating surface 8, with a Lambert emission. For clarity, only the conversion radiation 7 is shown at the emission 8, in fact, the mixture of conversion radiation 7 (yellow light) and a pro rata not Conver ⁇ -oriented pump radiation results in there (blue light) in a mixture of white light. Due to scattering processes in the conversion element 5, the proportionately unconverted pump radiation occurs the emission surface 8 is no longer bundled (collimated), but also with essentially Lambertian radiation.
  • the pump radiation spot 9 which the pump radiation 3 forms on the irradiation surface 6, can be moved over the irradiation surface 6. This is indicated by dashed lines in FIG. 1 for two other times.
  • the emission of the conversion radiation 7 (and also the proportionately unconverted pump radiation 3) travels across the emission surface 8.
  • the emission surface 8 is associated with optics (not shown), which project the emission surface 8 into the emission surface 8 Infinite images, that is, the white light emitted at different locations of the emission surface 8 then leads into different solid angle regions.
  • a white light emission pattern can be generated on the emission surface 8, as a result, white light can be selectively supplied to the solid angle regions. It is also possible to specifically exclude solid angle ranges from the illumination; reference is made to the comments in the introduction to the preferred field of application for adaptive street illumination.
  • the irradiation device 1 also has a sensor unit 10.
  • This is the radiating 8 zuge ⁇ assigned and constructed of a sensor 11, a photodiode, and a filter 12.
  • the filter 12 can designed as high- or low-pass be guided, so that then passes to the sensor 11 either exclusively pump or conversion radiation.
  • the sensor unit 10 is aligned obliquely laterally with respect to the emission surface 8, so it does not disturb the beam path (not shown) for the illumination application. Since the conversion radiation 7 Lambertsch is emitted or also the pump radiation at the emission surface 8 due to scattering processes has a Lambert's emission characteristic, nevertheless always also some radiation passes under the flat angles to the sensor unit 10.
  • the radiation power detected by the sensor unit 10 now varies.
  • time ti radiation reaches the sensor unit 10 only at a very shallow angle and thus (due to the Lambertian characteristic) with low power.
  • time t 2 the detected radiation power will already be greater, in the following time t 3 on biggest.
  • the time-resolved measured radiation power is connected to an evaluation unit of the sensor unit 10 13 is supplied as time-resolved measurement signal (in the present case is a wire-based connection Darge ⁇ is, but it is also a wireless connection possible lent).
  • a first possibility of further evaluation of the time- ⁇ -resolved measurement signal is now in a comparison with the portable over time irradiation of the irradiation surface 6.
  • ti, t2, t3 which area of the input surface was stimulated 6, and from which region of the Ab ⁇ radiating surface 8, the emission was contained in a respective time ti, t2, t3 detected radiation Leis ⁇ processing can be classified conces- a respective area of the radiating surface. 8
  • FIG. 2 shows the emission surface 8 of the Konversionsele- ment 5 in top view, wherein the back incident on the reflecting surface A ⁇ 6 pumping radiation spot is indicated by broken lines.
  • two Sen ⁇ sorritten 10a, b can be seen, which are each constructed from two sensors.
  • the sensors 11aa from the first sensor unit 10a are each provided with a low-pass filter 12a; the sensor unit is so designed for detecting conversion radiation (KS sensor unit).
  • the sensors llba, bb of the second Sen ⁇ sorappel 10b are each provided with a high-pass filter 12b as the second sensor unit 10b is thus adapted to detect the pumping radiation (PS-sensor unit).
  • the sensors 11a, ab and ba, bb of each of the sensor units 10a, 10b are arranged on different side edges of the conversion element 5, that is, each sensor unit 10a, b is rotated relative to one another.
  • the latter relates to a radiating surface 8 centrally and verticallyteurset ⁇ zende axis 20, in relation to which the sensors llaa, ab or ba, bb of a respective sensor unit 10a, b are rotated by ei ⁇ nen respective rotation angle 21 to each other (shown for the first sensor unit 10a is analogous to the second sensor unit 10b).
  • a quotient whose denominator is the sum of the time-resolved measurement signals of the sensors llba, bb the second sensor unit 10b, and its counter as the sum of the time-resolved measurement signals of the sensors llaa, formed from the first sensor unit 10a becomes.
  • the counter would lower values fall off.
  • the Nen ⁇ ner would develop to lower values, because then just less pumping radiation Lambertsch is scattered to the sensors llba, bb out.
  • the transmission T of the two filters 12a, b is plotted, the one filter 12b can pass only the pump radiation 3, the other filter 12a only the conversion radiation 7 (but cuts off a part of their spectral distribution).
  • the first sensor unit llaa from the second sensor unit llba, bb filter 12a, b

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Abstract

La présente invention concerne un dispositif d'exposition à un rayonnement (1) comprenant une unité de rayonnement de pompage (2) servant à l'émission d'un rayonnement de pompage (3) et un élément de conversion (5) doté d'une surface d'entrée (6) destinée à être exposée au rayonnement de pompage (3) et une surface de sortie (8) servant à l'émission d'un rayonnement de conversion (7), le dispositif d'exposition à un rayonnement (1) comprenant en outre une unité de détection (10) servant à détecter une puissance de rayonnement et une unité d'évaluation (13), et le dispositif d'exposition à un rayonnement (1) étant conçu de telle sorte que, lors du fonctionnement de l'unité de rayonnement de pompage (2), la surface d'entrée (6) de l'élément de conversion (5) est exposée au rayonnement de pompage (3) au moins temporairement de manière mobile au fil du temps, et l'unité de détection (10) étant conçue pour détecter une puissance de rayonnement avec une résolution temporelle au niveau de la surface d'entrée (6) et/ou de la surface de sortie (8) pendant l'exposition au rayonnement mobile et pour fournir cette puissance de rayonnement à l'unité d'évaluation (13) en tant que signal de mesure à résolution temporelle.
PCT/EP2018/050872 2017-02-15 2018-01-15 Dispositif d'exposition à un rayonnement comprenant une unité de rayonnement de pompage et un élément de conversion WO2018149577A1 (fr)

Applications Claiming Priority (2)

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DE102017103087.5A DE102017103087A1 (de) 2017-02-15 2017-02-15 Bestrahlungsvorrichtung mit Pumpstrahlungseinheit und Konversionselement
DE102017103087.5 2017-02-15

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WO2018149577A1 true WO2018149577A1 (fr) 2018-08-23

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WO (1) WO2018149577A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2767751A1 (fr) * 2013-02-14 2014-08-20 Valeo Vision Système d'éclairage adaptatif sécurisé
WO2015000006A1 (fr) * 2013-07-04 2015-01-08 Zizala Lichtsysteme Gmbh Projecteur de véhicule
DE102014202294A1 (de) * 2014-02-07 2015-08-13 Osram Gmbh Beleuchtungseinrichtung und Verfahren zum Betreiben einer Beleuchtungseinrichtung
DE102015202253A1 (de) * 2015-02-09 2016-08-11 Automotive Lighting Reutlingen Gmbh Laserlichtmodul für einen Kraftfahrzeugscheinwerfer
DE102015209340A1 (de) * 2015-05-21 2016-11-24 Osram Gmbh Leuchtvorrichtung

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Publication number Priority date Publication date Assignee Title
JP4975797B2 (ja) 2009-10-14 2012-07-11 シャープ株式会社 照明装置、車両用灯具および車両
FR3007820B1 (fr) 2013-06-28 2017-09-08 Valeo Vision Module optique securise pour vehicule automobile comprenant une source laser
DE102016200503A1 (de) 2016-01-16 2017-07-20 Robert Bosch Gmbh Vorrichtung und Verfahren zum Erzeugen von Licht mittels eines Leuchtstoffs

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2767751A1 (fr) * 2013-02-14 2014-08-20 Valeo Vision Système d'éclairage adaptatif sécurisé
WO2015000006A1 (fr) * 2013-07-04 2015-01-08 Zizala Lichtsysteme Gmbh Projecteur de véhicule
DE102014202294A1 (de) * 2014-02-07 2015-08-13 Osram Gmbh Beleuchtungseinrichtung und Verfahren zum Betreiben einer Beleuchtungseinrichtung
DE102015202253A1 (de) * 2015-02-09 2016-08-11 Automotive Lighting Reutlingen Gmbh Laserlichtmodul für einen Kraftfahrzeugscheinwerfer
DE102015209340A1 (de) * 2015-05-21 2016-11-24 Osram Gmbh Leuchtvorrichtung

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