WO2010044028A1 - Dispositif à laser pour systèmes de projection - Google Patents

Dispositif à laser pour systèmes de projection Download PDF

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Publication number
WO2010044028A1
WO2010044028A1 PCT/IB2009/054432 IB2009054432W WO2010044028A1 WO 2010044028 A1 WO2010044028 A1 WO 2010044028A1 IB 2009054432 W IB2009054432 W IB 2009054432W WO 2010044028 A1 WO2010044028 A1 WO 2010044028A1
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WO
WIPO (PCT)
Prior art keywords
wavelength
crystal
cavity
pump
laser
Prior art date
Application number
PCT/IB2009/054432
Other languages
English (en)
Inventor
Rifat A. M. Hikmet
Original Assignee
Koninklijke Philips Electronics N. V.
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 Koninklijke Philips Electronics N. V. filed Critical Koninklijke Philips Electronics N. V.
Publication of WO2010044028A1 publication Critical patent/WO2010044028A1/fr

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
    • H01S3/08—Construction or shape of optical resonators or components thereof
    • H01S3/081—Construction or shape of optical resonators or components thereof comprising three or more reflectors
    • H01S3/082—Construction or shape of optical resonators or components thereof comprising three or more reflectors defining a plurality of resonators, e.g. for mode selection or suppression
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/23—Arrangements of two or more lasers not provided for in groups H01S3/02 - H01S3/22, e.g. tandem arrangements of separate active media
    • H01S3/2383—Parallel arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
    • H01S3/08—Construction or shape of optical resonators or components thereof
    • H01S3/08086—Multiple-wavelength emission
    • H01S3/0809—Two-wavelenghth emission
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
    • H01S3/102—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling the active medium, e.g. by controlling the processes or apparatus for excitation
    • H01S3/1022—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling the active medium, e.g. by controlling the processes or apparatus for excitation by controlling the optical pumping
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
    • H01S3/106—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/14—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range characterised by the material used as the active medium
    • H01S3/16—Solid materials
    • H01S3/1601—Solid materials characterised by an active (lasing) ion
    • H01S3/1603—Solid materials characterised by an active (lasing) ion rare earth
    • H01S3/1613—Solid materials characterised by an active (lasing) ion rare earth praseodymium
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/14—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range characterised by the material used as the active medium
    • H01S3/16—Solid materials
    • H01S3/163—Solid materials characterised by a crystal matrix
    • H01S3/1645—Solid materials characterised by a crystal matrix halide
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/23—Arrangements of two or more lasers not provided for in groups H01S3/02 - H01S3/22, e.g. tandem arrangements of separate active media
    • H01S3/2383—Parallel arrangements
    • H01S3/2391—Parallel arrangements emitting at different wavelengths

Definitions

  • the invention relates to the field of laser devices adapted for projection systems, and preferably adapted to be applied in flying spot projectors, in lighting and/or in imaging applications.
  • Such projectors comprise at least three lasers emitting red, e.g. at 635 nm, green, e.g. at 532 nm, and blue light, e.g. at 440 nm.
  • red e.g. at 635 nm
  • green e.g. at 532 nm
  • blue light e.g. at 440 nm.
  • the use of three lasers emitting the mentioned colors makes the system bulky and expensive.
  • the system comprises a light source system configured and operable to generate structured light in the form of a plurality or spatially separated light beams, and a beam shaping arrangement.
  • the beam shaping arrangement is configured as a diffractive optical unit configured and operable to carry out the following: combining an array of spatially separated light beams into a single light beam thereby significantly increasing intensity of the illuminating light and affecting intensity profile of the light beam to provide the illuminating light of a substantially rectangular uniform intensity profile.
  • Laser-based light sources are suitable for sequential projection of colors in projection displays as they comprise a lower bandwidth and a lower power consumption than incoherent light sources.
  • MEMS micro-electromechanical system
  • an MEM scanner can be used to generate an image making the system compact.
  • very small beamers so called pico beamers, can be integrated in mobile devices such as in cellular telephones.
  • Conventional projection systems comprising laser devices are rather complex, bulky and expensive. In almost all projection systems three separate lasers are used and, thus, the size of such systems is big and the costs are high.
  • a laser device for projection systems comprising: a laser emitting a pump laser beam at a pump wavelength, a first cavity arrangement with a first cavity and a crystal being adapted for generating a first laser beam at a first wavelength when pumped with the pump laser beam, a second cavity arrangement with a second cavity and a crystal being adapted for generating a second laser beam at a second wavelength when pumped with the pump laser beam, and an optical arrangement for sequentially directing the first laser beam and the second laser beam to an output of the laser device, wherein the second wavelength is different from the first wavelength, and the first wavelength and the second wavelength are in the visible spectral range and are higher than the pump wavelength.
  • the first cavity arrangement and the second cavity arrangement comprise a common crystal, and a cavity switch is provided for sequentially switching the first cavity and the second cavity to the common crystal, respectively.
  • the first cavity arrangement comprises a first crystal and the second cavity arrangement comprises a second crystal, the second crystal being different from the first crystal, and an optical switch is provided for sequentially switching the pump laser beam to the first cavity arrangement and to the second cavity arrangement, respectively.
  • the feature that the second crystal is different from the first crystal does not necessarily mean that the materials of these crystals are different from each other. In fact, according to a preferred embodiment of the invention, the materials are even the same. However, this feature means that two separate crystals are provided, i.e. one for the first cavity arrangement and one for the second cavity arrangement.
  • the pump wavelength is in the violet or/and visible spectral range, the pump wavelength preferably being > 380 nm and ⁇ 540 nm. Further, according to a preferred embodiment of the invention, the first wavelength and/or the second wavelength are > 440 nm and ⁇ 700 nm. If the pump wavelength is in the visible spectral range, especially if a blue pump laser beam is used, according to a preferred embodiment of the invention, the optical arrangement for sequentially directing the first laser beam and the second laser beam to the output of the laser device is also adapted for sequentially directing the pump laser beam to the output of the laser device. In this way, no separate cavity arrangement for blue light of the laser device is necessary.
  • a single laser source emitting a wavelength in the visible spectral range comprising a high energy is used for pumping at least one crystal to generate laser beams emitting at different wavelengths in the visible spectral range comprising a lower energy than the energy of the pump wavelength.
  • Such lasers are also called "down conversion lasers”.
  • oxides such as YVO 4 , Y3 Al 5 O u, YAIO3 and/or fluoride crystals such as LiYF 4 , LiLuF 4 , BaY 2 F 8 , and fluoride glass ZBLAN doped with various rare earth metals such as Tm 3+ , Tb 3+ , Pr 3+ , Er 3+ , Eu 3+ , Nd 3+ , Sm 3+ , Sm 2+ , Ti 3+ are used.
  • the optical arrangement comprises an optical system that comprises at least one of a plurality of lenses and a plurality of mirrors.
  • the laser device comprises a first output coupler adapted for coupling out a laser beam at the first emission wavelength and/or the second emission wavelength.
  • the laser device further comprises a third crystal in a third cavity for a third emission wavelength, the third emission wavelength being different from the first emission wavelength and/or the second emission wavelength.
  • a third crystal in a third cavity for a third emission wavelength, the third emission wavelength being different from the first emission wavelength and/or the second emission wavelength.
  • the first crystal, the second crystal and the third crystal preferably comprises a rare-earth-doped host material.
  • the rare-earth dopant ion preferably corresponds to praseodymium.
  • the crystal comprises co-dopants such as ytterbium that support the effect of energy transfer between the first rare-earth ion, for instance praseodymium, and the second rare-earth ion, for instance ytterbium. Therefore, the efficiency of the respective laser transitions is increased.
  • the laser corresponds to a solid state diode-pumped crystal laser. Also other lasers, such as gaseous lasers, can be applied.
  • the pump wavelength preferably comprises one of violet, blue and green color.
  • pumping the first crystal and the second crystal with the laser beam at the pump wavelength corresponds to down converting the pump wavelength to the first emission wavelength in the visible spectral range and to the second emission wavelength in the visible spectral range, wherein the first emission wavelength and the second emission wavelength comprise lower energy than the energy of the pump wavelength.
  • Pumping the first crystal and the second crystal with the laser beam at the pump wavelength preferably comprises one of sequential and simultaneous pumping.
  • the first cavity and the second cavity can be pumped one after another or at the same time.
  • Such a laser device is preferably applied in at least one of the following applications: digital image projectors with image forming elements such as liquid crystal cells and deformable mirror devices, flying spot projectors, lighting and in imaging applications.
  • the invention is also advantageously used in bio marker applications such as recognition of labeled protein and DNA. Preferably, it is also used in flow cytometry. BRIEF DESCRIPTION OF THE DRAWINGS
  • Fig. 1 schematically depicts a single laser source for pumping two crystals to produce laser emission at different wavelengths in the visible spectral range according to an embodiment of the invention
  • Fig. 2 shows the energy level diagram of a praseodymium-doped LiLuF 4 crystal and the relevant laser transitions according to the embodiment of the invention.
  • Fig. 3 schematically depicts a laser resonator comprising an anti- reflection coating for the pump wavelength and a high reflection coating for a first emission wavelength at the pumping mirror according to the embodiment of the invention.
  • Fig. 1 shows a single laser source for pumping for example a praseodymium-doped crystal comprised by two cavities or resonators, respectively, to produce laser emission at different wavelengths in the visible spectral range according to a preferred embodiment of the invention.
  • a laser 1 emitting a light beam comprising the pump wavelength is used.
  • the pump wavelength comprises blue color (blue wavelength).
  • the direction of the laser beam at the blue wavelength is altered using an optical switch 2.
  • the optical switch may comprise a mechanically moving element such as one ore more rotating or moving mirror(s), but it can also comprise polarizing beam splitters in combination with polarisation direction rotators. This results in the laser beam getting directed to the different laser cavities comprising the first crystal 4 and the second crystal 5.
  • the laser cavities generate other laser emission wavelengths comprising colors being different from the color of the pump wavelength but being also in the visible spectral range.
  • the laser device emits green and red colors at its output.
  • the optical arrangement 3 comprises a plurality of mirrors as shown in Fig. 1. In the configuration illustrated in Fig. 1 blue light from the laser is also used in the image 6.
  • the position of the laser beam is kept constant and a mirror and/or a lens is replaced by another mirror and/or lens comprised by the optical arrangement 3. Therefore, the color of the laser emission is changed.
  • a laser emitting a laser beam comprising violet color and a third cavity comprising a third crystal is used, wherein the first, second and third crystal are pumped with the laser beam (pump beam) comprising violet color (violet wavelength).
  • the laser beam pump beam
  • violet color violet wavelength
  • a rare-earth doped host comprising a low phonon energy (LPE) material is used for the down conversion laser.
  • the energy of the pump wavelength comprising blue color is down converted to lower energies at the emission wavelengths comprising green and red color.
  • Fig. 2 shows the energy level diagram of praseodymium in a LiLuF 4 crystal according to the preferred embodiment of the invention.
  • the most relevant laser transitions comprising red, orange, green and blue emissions are shown as well.
  • the most common laser transitions are indicated with arrows in the energy level diagram that also labels the energy levels in the transition window of the host material.
  • the host material comprises a LiLuF 4 crystal.
  • praseodymium can be pumped with blue light to generate green and red emissions.
  • two different materials such as praseodymium and ytterbium, are used to generate green and red emissions.
  • Fig. 3 schematically depicts a laser resonator according to the preferred embodiment of the invention.
  • a rare-earth-doped crystal 10 is inserted into the cavity or resonator, respectively, wherein the resonator comprises appropriate coatings for the focusing lens 8 and/or for the mirror(s) used.
  • Fig. 3 schematically depicts a resonator comprising an anti-reflection coating for blue color, i.e. for the pump wavelength, and a high reflection coating for the green emission wavelength at the pump mirror 9.
  • the resonator shows a high reflecting coating for blue and a partially reflector for the green emission wavelength.
  • the output lens 12 is used to collimate the laser beam with an emission wavelength comprising green color.
  • red and green colors are emitted as well.
  • a single laser source is sufficient.
  • a pump mirror is switched between the red and the green reflection states so that the lasing color is selected.
  • the output mirror is reflective for both green and red color.
  • the lasing color i.e. the emission wavelength
  • the pump window can be switched between green and reflecting states. It is also possible to switch both pump and output window switching between green and red reflecting states.
  • using a deep blue or violet pump and selecting the appropriate mirrors and/or lenses blue, red and green colors are emitted as well.
  • a pump mirror is switched between the blue, red and the green reflection states so that the lasing color is selected.
  • the output mirror is reflective for blue, green and red color.
  • Switchable mirrors can be obtained for example by physically changing the position of the mirrors. It is also possible to use materials such as switchable cholesteric liquid crystals and or switchable photonic band gap materials which can be switched under the influence of external stimuli such as electric fields and temperature. While the invention has been illustrated and described in detail in the drawings and foregoing description, such illustration and description are to be considered illustrative or exemplary and not restrictive; the invention is not limited to the disclosed embodiments.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Optics & Photonics (AREA)
  • Lasers (AREA)
  • Projection Apparatus (AREA)

Abstract

L'invention porte sur un dispositif à laser pour systèmes de projection, comprenant : un laser (1) émettant un faisceau laser de pompage à une longueur d'onde de pompage, un premier agencement de cavité comprenant une première cavité et un cristal conçu pour générer un premier faisceau laser à une première longueur d'onde, lorsqu'il est pompé par le faisceau laser de pompage, un second agencement de cavité comprenant une seconde cavité et un cristal conçu pour générer un second faisceau laser à une seconde longueur d'onde lorsqu'il est pompé par le faisceau laser de pompage, et un agencement optique (3) pour diriger séquentiellement le faisceau laser de pompage, le premier faisceau laser et le second faisceau laser vers une sortie (6) du dispositif à laser, la seconde longueur d'onde étant différente de la première longueur d'onde et la première longueur d'onde et la seconde longueur d'onde étant dans la plage spectrale visible et étant supérieures à la longueur d'onde de pompage. Le premier agencement de cavité et le second agencement de cavité peuvent comprendre un cristal commun, un commutateur de cavité étant prévu pour commuter séquentiellement la première cavité et la seconde cavité vers le cristal commun, respectivement. En variante, le premier agencement de cavité comprend un premier cristal (4) et le second agencement de cavité comprend un second cristal (5) différent du premier cristal (4), et un commutateur optique (2) est prévu pour commuter séquentiellement le faisceau laser de pompage vers le premier agencement de cavité et vers le second agencement de cavité, respectivement.
PCT/IB2009/054432 2008-10-17 2009-10-09 Dispositif à laser pour systèmes de projection WO2010044028A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP08166939 2008-10-17
EP08166939.2 2008-10-17

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WO2010044028A1 true WO2010044028A1 (fr) 2010-04-22

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WO (1) WO2010044028A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023061911A1 (fr) * 2021-10-12 2023-04-20 Signify Holding B.V. Source de lumière blanche

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012032670A1 (fr) * 2010-09-07 2012-03-15 大日本印刷株式会社 Dispositif d'éclairage utilisant une source de lumière cohérente
JP6124385B2 (ja) * 2014-09-05 2017-05-10 インテル・コーポレーション イメージプロジェクタおよび光アセンブリ

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4167712A (en) * 1978-01-31 1979-09-11 The United States Of America As Represented By The Secretary Of The Navy Praseodymium blue-green laser system
US4441186A (en) * 1981-12-31 1984-04-03 Gte Products Corporation Electronically switchable multiwavelength laser system
DE4110189A1 (de) * 1991-03-25 1992-10-01 Wolf Jean Pierre Mehrwellenlaenge-laseroszillator mit geometrisch gekoppelten resonatoren
EP0635986A1 (fr) * 1989-02-27 1995-01-25 Texas Instruments Incorporated Appareil et méthode pour système de vidéo numérisée
US20030035447A1 (en) * 2001-08-14 2003-02-20 Richard Scheps All solid-state RGB and white light generator
WO2007006092A1 (fr) * 2005-07-11 2007-01-18 Ellex Medical Pty Ltd Laser a pompage par diode
US20070189343A1 (en) * 2006-02-14 2007-08-16 Wolf Seelert White light solid-state laser source with adjustable RGB output
WO2009022291A2 (fr) * 2007-08-16 2009-02-19 Philips Intellectual Property & Standards Gmbh Laser à solide à double longueur d'onde commutable

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4167712A (en) * 1978-01-31 1979-09-11 The United States Of America As Represented By The Secretary Of The Navy Praseodymium blue-green laser system
US4441186A (en) * 1981-12-31 1984-04-03 Gte Products Corporation Electronically switchable multiwavelength laser system
EP0635986A1 (fr) * 1989-02-27 1995-01-25 Texas Instruments Incorporated Appareil et méthode pour système de vidéo numérisée
DE4110189A1 (de) * 1991-03-25 1992-10-01 Wolf Jean Pierre Mehrwellenlaenge-laseroszillator mit geometrisch gekoppelten resonatoren
US20030035447A1 (en) * 2001-08-14 2003-02-20 Richard Scheps All solid-state RGB and white light generator
WO2007006092A1 (fr) * 2005-07-11 2007-01-18 Ellex Medical Pty Ltd Laser a pompage par diode
US20070189343A1 (en) * 2006-02-14 2007-08-16 Wolf Seelert White light solid-state laser source with adjustable RGB output
WO2009022291A2 (fr) * 2007-08-16 2009-02-19 Philips Intellectual Property & Standards Gmbh Laser à solide à double longueur d'onde commutable

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DANGER T ET AL: "PULSED LASER ACTION OF PR:GDLIF4 AT ROOM TEMPERATURE", APPLIED PHYSICS B. PHOTOPHYSICS AND CHEMISTRY, SPRINGER VERLAG. HEIDELBERG, DE, vol. B57, no. 3, 1 September 1993 (1993-09-01), pages 239 - 241, XP000395435 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023061911A1 (fr) * 2021-10-12 2023-04-20 Signify Holding B.V. Source de lumière blanche

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