CN112628617A - Refraction and reflection type laser light-emitting device - Google Patents
Refraction and reflection type laser light-emitting device Download PDFInfo
- Publication number
- CN112628617A CN112628617A CN202110047652.0A CN202110047652A CN112628617A CN 112628617 A CN112628617 A CN 112628617A CN 202110047652 A CN202110047652 A CN 202110047652A CN 112628617 A CN112628617 A CN 112628617A
- Authority
- CN
- China
- Prior art keywords
- light
- laser
- focus
- ellipsoidal reflector
- mirror
- 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.)
- Pending
Links
- 238000006243 chemical reaction Methods 0.000 claims abstract description 62
- 238000009792 diffusion process Methods 0.000 claims abstract description 54
- 230000003287 optical effect Effects 0.000 claims description 97
- 239000000463 material Substances 0.000 claims description 52
- 230000005855 radiation Effects 0.000 claims description 17
- 230000000903 blocking effect Effects 0.000 claims description 6
- 230000017525 heat dissipation Effects 0.000 claims description 6
- 239000000919 ceramic Substances 0.000 claims description 4
- 230000009471 action Effects 0.000 claims description 3
- 238000005286 illumination Methods 0.000 description 16
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 229910052709 silver Inorganic materials 0.000 description 3
- 239000004332 silver Substances 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001795 light effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
- F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
- F21K9/20—Light sources comprising attachment means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
- F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
- F21K9/60—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
- F21K9/64—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction using wavelength conversion means distinct or spaced from the light-generating element, e.g. a remote phosphor layer
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
- F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
- F21K9/60—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
- F21K9/68—Details of reflectors forming part of the light source
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
- F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
- F21K9/60—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
- F21K9/69—Details of refractors forming part of the light source
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V1/00—Shades for light sources, i.e. lampshades for table, floor, wall or ceiling lamps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
- F21V9/30—Elements containing photoluminescent material distinct from or spaced from the light source
- F21V9/32—Elements containing photoluminescent material distinct from or spaced from the light source characterised by the arrangement of the photoluminescent material
- F21V9/35—Elements containing photoluminescent material distinct from or spaced from the light source characterised by the arrangement of the photoluminescent material at focal points, e.g. of refractors, lenses, reflectors or arrays of light sources
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2006—Lamp housings characterised by the light source
- G03B21/2033—LED or laser light sources
- G03B21/204—LED or laser light sources using secondary light emission, e.g. luminescence or fluorescence
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2066—Reflectors in illumination beam
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2115/00—Light-generating elements of semiconductor light sources
- F21Y2115/30—Semiconductor lasers
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Optics & Photonics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Multimedia (AREA)
- Projection Apparatus (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
The invention discloses a refraction and reflection type laser light-emitting device which comprises at least one laser diode, at least one collimating lens, a laser condenser group, a light wavelength conversion module, a light diffusion module, a dichroic mirror, a light emergent collimating mirror, a first ellipsoidal reflector and a second ellipsoidal reflector, wherein the light wavelength conversion module is positioned at a first focus of the first ellipsoidal reflector, a second focus of the first ellipsoidal reflector is superposed with an object focus of the light emergent collimating mirror, the light diffusion module is positioned at a first focus of the second ellipsoidal reflector, a second focus of the second ellipsoidal reflector is also superposed with an object focus of the light emergent collimating mirror, and laser light emitted by the laser diode is collimated by the laser diode and then enters the laser condenser group in parallel to form a converged laser beam. This technical scheme only uses a set of laser condensing lens, both can be to the laser focus of distributing to wavelength conversion module, can also be to the laser focus of distributing to the light diffusion module. The number of the lenses is saved, and the cost is reduced.
Description
Technical Field
The invention relates to a refraction and reflection type laser light-emitting device which can be used in the technical field of laser light-emitting illumination.
Background
In recent years, an LED light source is replacing a traditional incandescent lamp and an energy-saving lamp to become a novel illumination light source, and as a general illumination light source, the LED light source has the advantages of high efficiency, energy saving, environmental protection, long service life and the like, but the electro-optical efficiency of the LED light source limits the self-illumination brightness to be limited. In some application fields requiring high brightness light sources, such as outdoor searchlights, stage lights, automobile high beams, large-size projection displays and other fields, the LEDs cannot meet the requirements. Laser illumination using semiconductor laser diodes has many advantages, such as fast response speed, high illumination brightness, small lamp size, obvious energy saving effect, and both brightness and color temperature and illumination effect in accordance with human visual habits. The point light source with small optical expansion amount (light-emitting area angular area) and high brightness can be obtained by utilizing the laser excitation fluorescent powder technology, and can be used in the application field needing high-brightness illumination.
The laser excited fluorescent powder technology focuses laser on a fluorescent powder layer to form a point light source with a small light emitting point, the fluorescent powder is excited to generate high-brightness radiation light, and the fluorescent light is approximately in Lambert distribution. Common excitation modes are: the blue laser excites the yellow phosphor, producing a yellow radiation spectrum. According to the principle of color complementation, if a part of blue light is mixed, white light can be formed, and then the emission is collected by an optical system, so that a white light source is formed.
In laser fluorescent projection display, phosphor is usually coated on a rotating color wheel for heat dissipation, and a blue light part in synthesized white light is formed by rotating the color wheel in a time-sharing manner, so that the structure is complex and is not suitable for static illumination.
Some current static illumination light source schemes collect yellow and white light emitted by fluorescent radiation by using a plurality of lenses, the lenses are limited in caliber in practical installation due to the relative parallel arrangement of the lenses and the fluorescent materials, and the reflected light emitted by the fluorescent materials is in lambertian divergence of 180 degrees, so that the collection efficiency of the radiated fluorescence is influenced by the numerical aperture of the lenses. And a condenser lens group is required for wavelength conversion light collection and color combination scattered laser collection, which increases the number of lenses and the cost. In addition, when the laser excites the fluorescent material to emit light, if oblique incidence is adopted, the focused focus has oblique distortion, which is equivalent to enlarging the size of a focus point light source, is not beneficial to collimation of output light beams and influences the light efficiency.
Disclosure of Invention
The present invention is directed to solving the above-mentioned problems of the prior art, and provides a catadioptric laser emitting device.
The purpose of the invention is realized by the following technical scheme: a catadioptric laser light-emitting device comprises at least one laser diode and a collimating lens matched with the laser diode, a laser condenser group, a light wavelength conversion module, a light diffusion module, a dichroic mirror, a light emergent collimating mirror, a first ellipsoidal reflector and a second ellipsoidal reflector; the optical wavelength conversion module is positioned at a first focus of the first ellipsoidal reflector, a second focus of the first ellipsoidal reflector is superposed with an object focus of the light emergent collimating mirror, the optical diffusion module is positioned at a first focus of the second ellipsoidal reflector, a second focus of the second ellipsoidal reflector is superposed with an object focus of the light emergent collimating mirror, and optical axes of the two ellipsoidal reflectors are mutually vertical; laser emitted by a laser diode is collimated by a collimating lens and then parallelly enters a laser condenser group to form a converged laser beam, one part of the converged laser beam under the action of a dichroic mirror is converged on an optical wavelength conversion module to excite fluorescence with the radiation wavelength within the range of 470 nm-720 nm, the fluorescence is reflected and converged at an object focus by a first ellipsoidal reflector, the other part of the converged laser beam is converged on a light diffusion module to form diffused light, the diffused light is reflected and converged at the object focus by a second ellipsoidal reflector, incident light in two directions is transmitted or reflected by the dichroic mirror and is combined at a light emergent collimating mirror to form mixed parallel light for output.
Preferably, the laser diodes have the same wavelength or a combination of multiple different wavelengths, and the wavelength range of light emitted by the laser diodes is 280-470 nm; the light diffusion module at least comprises a light diffusion material unit and a diffusion material fixing and heat dissipation module.
Preferably, the laser condenser group is a single lens or a combination of a plurality of lenses, or an aspheric lens, or a combination of a spherical lens and an aspheric lens, or a combination of a positive lens and a negative lens, or a concave reflecting condenser; the focal length of the laser condenser set is determined according to the central distance between the laser condenser set and the dichroic mirror and the distance between the dichroic mirror and the optical wavelength conversion module or the optical diffusion module.
Preferably, the light wavelength conversion module comprises a light wavelength conversion material unit and a material fixing and heat dissipating module, wherein the light wavelength conversion material unit is a fluorescent ceramic.
Preferably, the dichroic mirror is a parallel flat plate or a cube prism including a 45 ° splitting plane, and an optical axis of the dichroic mirror forms an included angle of 45 ° with respect to a central optical axis of the condenser lens group, where the parallel flat plate includes a first surface and a second surface, and at least one of the surfaces is capable of splitting incident laser light to allow a part of the incident laser light to be reflected and another part of the incident laser light to be transmitted.
Preferably, the light exit collimator is located between the dichroic mirror and the light outlet of the system, and is a single lens or a lens group, and the fluorescent light converged at the second focal point by the first ellipsoidal reflector and the diffused light converged at the second focal point by the second ellipsoidal reflector can be combined by the light exit collimator and then exit as parallel light.
Preferably, a plane reflector is arranged between the collimating lens and the laser condenser group, and the included angle between the normal of the plane reflector and the optical axis of the laser condenser group is 45 degrees; divergent laser beams emitted by the laser diode are collected and collimated by the collimating lens, and output collimated laser beams enter the plane mirror at an angle of 45 degrees and are reflected by the plane mirror; the plane mirror rotates around the direction perpendicular to the optical axis of the laser condenser lens group, and the rotation angle range is 0-45 degrees.
Preferably, the convergent light beam emitted by the laser condenser group is divided into a reflected light beam and a transmitted light beam by the dichroic mirror, the reflected light beam excites the light wavelength conversion module, the fluorescence generated by radiation is reflected by the inner wall of the first ellipsoidal reflector, converged to the second focus of the first ellipsoidal reflector, collimated by the light emitting collimator and then output, the light beam transmitted by the dichroic mirror is focused to the light diffusion module, the generated diffused light is reflected by the inner wall of the second ellipsoidal reflector, converged to the second focus of the second ellipsoidal reflector, partially reflected by the dichroic mirror and then enters the light emitting collimator, and is superposed and combined with the fluorescence to output parallel white light;
one or more positions of the front or back of the second focus of the two ellipsoidal reflectors or the front or back of the light emergent collimating mirror are respectively provided with a diaphragm or a light blocking sheet.
The technical scheme of the invention has the advantages that: according to the technical scheme, diaphragms or light blocking sheets can be arranged in front of and behind the focus of the first ellipsoidal reflector and the focus of the second ellipsoidal reflector, stray light is filtered, and the size of a light beam and an illumination area are controlled simultaneously.
This technical scheme only uses a set of laser condensing lens, both can be to the laser focus of distributing wavelength conversion module, can be to the laser focus of distributing the light diffusion module again, has not only saved lens quantity, has still reduced manufacturing cost.
According to the technical scheme, holes do not need to be formed in the first ellipsoidal reflector and the second ellipsoidal reflector, laser beams can be incident and focused on the focal point of the reflector, the manufacturing process of the reflector is simplified, and the reflective area and the light effect are not reduced.
The technical scheme can ensure that laser is normally incident into the optical wavelength conversion material, reduces the distortion diffusion of oblique focusing, has better collimation of output radiation light and white light and higher luminous efficiency, and is favorable for subsequent further light beam conversion.
Drawings
Fig. 1 is a schematic structural diagram of a first exemplary embodiment of a catadioptric laser light-emitting device according to the present invention.
Fig. 2 is a schematic structural diagram of a second embodiment of a catadioptric laser light-emitting device according to the present invention.
Fig. 3 is a schematic structural diagram of a third embodiment of a catadioptric laser light-emitting device according to the present invention.
Fig. 4 is a schematic structural diagram of a fourth embodiment of a catadioptric laser light-emitting device of the present invention.
Detailed Description
Objects, advantages and features of the present invention will be illustrated and explained by the following non-limiting description of preferred embodiments. The embodiments are merely exemplary for applying the technical solutions of the present invention, and any technical solution formed by replacing or converting the equivalent thereof falls within the scope of the present invention claimed.
The invention discloses a catadioptric laser light-emitting device, which comprises at least one laser diode, at least one collimating lens, a laser condenser group 104, a light wavelength conversion module, a light diffusion module, a dichroic mirror, a light emergent collimating mirror, a first ellipsoidal reflector and a second ellipsoidal reflector, as shown in figure 1. The optical wavelength conversion module is positioned at a first focus of the first ellipsoidal reflector, a second focus of the first ellipsoidal reflector is superposed with an object focus of the light emergent collimating mirror, the optical diffusion module is positioned at a first focus of the second ellipsoidal reflector, a second focus of the second ellipsoidal reflector is superposed with an object focus of the light emergent collimating mirror, and optical axes of the two ellipsoidal reflectors are perpendicular to each other.
Laser emitted by a laser diode is collimated by a collimating lens and then parallelly enters a laser condenser group to form a converged laser beam, one part of the converged laser beam under the action of a dichroic mirror is converged on an optical wavelength conversion module to excite fluorescence with the radiation wavelength within the range of 470 nm-720 nm, the fluorescence is reflected and converged at an object focus by a first ellipsoidal reflector, the other part of the converged laser beam is converged on a light diffusion module to form diffused light, the diffused light is reflected and converged at the object focus by a second ellipsoidal reflector, incident light in two directions is transmitted or reflected by the dichroic mirror and is combined at a light emergent collimating mirror to form mixed parallel light for output.
In this technical solution, the apparatus may include one or more laser diodes, and the laser diodes may have the same wavelength or a combination of a plurality of different wavelengths. The light emitting wavelength range of the laser diode can be 280 nm-470 nm, and the laser diode can be independently controlled and comprises switching, signal modulation and drive current increase or decrease.
In the technical scheme, the device can comprise one or more collimating lenses, the collimating lenses are positioned behind the laser diodes, and the collimating lenses collimate the laser with the large divergence angle emitted by the laser diodes and then output the collimated laser as parallel light.
The laser beam emitted from the collimating lens can partially enter the reflecting mirror first and then is reflected to enter the laser focusing mirror group. Or part of the light is directly incident to the laser condenser lens group. Or all the light beams can be reflected into the condenser lens group after being incident into the reflector lens group, or all the light beams can be directly incident into the condenser lens group. The collimated laser beams incident to the laser condenser lens group can be all parallel to each other, can also be partially parallel, can also be vertically and normally incident to the condenser lens group, namely the incident direction is parallel to the central optical axis of the condenser lens group, and can also be incident to the condenser lens group at a certain angle.
The laser condenser set is arranged between the laser diode and the light splitting filter lens, and can be a single lens, or a combination of a plurality of lenses, or an aspheric lens, or a combination of a spherical lens and an aspheric lens, or a combination of a positive lens and a negative lens, or a concave reflecting condenser. The laser condenser group has positive focal power, and the focal length of the laser condenser group is determined according to the central distance between the condenser group and the dichroic mirror and the distance between the dichroic mirror and the optical wavelength conversion module or the optical diffusion module.
The dichroic mirror is positioned behind the laser condenser lens group, can be a parallel flat plate, has an optical axis forming an included angle of 45 degrees relative to a central optical axis of the condenser lens group, and comprises a first surface and a second surface, wherein at least one surface can split incident laser light to enable one part of the incident laser light to be reflected and the other part of the incident laser light to be transmitted. The dichroic mirror may also be a cubic prism comprising a 45 ° splitting plane.
The optical wavelength conversion module comprises an optical wavelength conversion material unit, and a material fixing and heat dissipation module can be additionally arranged according to design requirements, wherein the optical wavelength conversion material unit can be fluorescent ceramic or other luminescent materials. The laser beam can be focused on the optical wavelength conversion material unit after being refracted and converged by the condenser group, so that the optical wavelength conversion unit can absorb the laser energy emitted by the laser and radiate fluorescence with the wavelength within the range of 470-720 nm.
The first ellipsoidal reflector is surrounded at the periphery of the optical wavelength conversion module, and the inner surface of the first ellipsoidal reflector is plated with a reflective film, such as a metal silver film or a dielectric film. The first ellipsoidal reflector has a first focus and a second focus, wherein the first focus is close to the bottom end of the ellipsoidal reflector and is opposite to the light outlet of the ellipsoidal reflector. The optical wavelength conversion material unit in the optical wavelength conversion module is arranged on the first focus of the first ellipsoidal reflector or near the first focus. When the optical wavelength conversion material unit is excited by the incident laser, the emitted fluorescence is reflected by the inner wall of the first ellipsoidal reflector and then is converged to the second focus of the first ellipsoidal reflector.
The light diffusion module at least comprises a light diffusion material unit and a diffusion material fixing and heat dissipation module. The light diffusion material unit has a scattering material and a structure capable of diffusing the laser light. The laser beam is refracted and converged by the condenser lens group, can be focused on the light diffusion material unit, and then is scattered and diffused by diffuse reflection to generate diffused light for color combination.
The periphery of the light diffusion module is surrounded by the second ellipsoidal reflector, and the inner surface of the second ellipsoidal reflector is plated with a reflecting film, such as a metal silver film or a dielectric film. The second ellipsoidal reflector has a focus A and a focus B, wherein the focus A is close to the bottom end of the second ellipsoidal reflector and is opposite to the light outlet of the ellipsoidal reflector. The light diffusion material unit in the light diffusion module is arranged on the focus A of the second ellipsoidal reflector or near the focus A. The incident laser irradiates the light diffusion material unit, is scattered in a scattering and diffuse reflection mode, is reflected by the inner wall of the second ellipsoidal reflector, and then is converged to the focus B of the second ellipsoidal reflector.
The light emergent collimating lens is positioned between the dichroic mirror and the light outlet of the system, has positive focal power, and can be a single lens or a lens group. The light emergent collimating lens and the second focus of the first ellipsoidal reflector are confocal, that is, the front focus of the light emergent collimating lens and the second focus of the ellipsoidal reflector are coincided. Moreover, the B-focal points of the light exit collimator and the second ellipsoidal mirror are also confocal.
The radiant light converged at the second focal point by the first ellipsoidal reflector and the diffused light converged at the B focal point by the second ellipsoidal reflector can be combined by the light exit collimator and then exit as parallel light.
The dichroic mirror can be designed according to the following first and second schemes:
the first scheme is as follows: a part of the converged laser beams emitted from the laser condenser group is reflected by the dichroic mirror and then focused on the light wavelength conversion material unit to excite the light wavelength conversion material to radiate and emit light. The other part is transmitted from the dichroic mirror, and the transmitted laser light is focused on the light diffusing material unit to generate diffused light for color combination.
The optical axis of the first ellipsoidal reflector is perpendicular to the optical axis of the laser condenser group, and the dichroic mirror completely transmits the radiant light after the light wavelength conversion.
The light wavelength converted radiation is collected and reflected by the first ellipsoidal reflector, then converged to the second focus of the first ellipsoidal reflector, and finally output as parallel light after passing through the light emergent collimating mirror. The second focal point of the first ellipsoidal mirror may be located in front of, inside of, or behind the dichroic mirror. The optical axis of the light emergent collimating mirror is coincided with the central optical axis of the first ellipsoidal reflector.
The optical axis of the second ellipsoidal reflector coincides with the optical axis of the laser condenser group. And the diffused light used for color combination is partially reflected by the dichroic mirror, is converged to a B focus of the second ellipsoidal reflector, finally passes through the light emergent collimating mirror, is superposed and combined with the radiation light, and is mixed to generate white light emergent.
The second scheme is as follows:
a part of the laser beam emitted from the laser condenser group is transmitted through the dichroic mirror, the transmitted laser beam is focused on the light wavelength conversion material unit to generate radiation light, the other part of the laser beam is reflected by the dichroic mirror, and the reflected laser beam is focused on the light diffusion material unit to generate diffused light.
The optical axis of the first ellipsoidal reflector coincides with the optical axis of the laser condenser group, and the dichroic mirror completely reflects the radiant light after the light wavelength conversion.
The light wavelength converted radiation is collected and reflected by the first ellipsoidal reflector, then converged to the second focus of the first ellipsoidal reflector, and finally output as parallel light after passing through the light emergent collimating mirror. The optical axis of the light emergent collimating mirror is superposed with the central optical axis of the second ellipsoidal reflector.
The optical axis of the second ellipsoidal reflector is perpendicular to the optical axis of the laser condenser group. And the diffused light used for color combination is partially transmitted by the dichroic mirror, the part of transmitted light is converged to a B focus of the second ellipsoidal reflector, and finally, after passing through the light emergent collimating mirror, the diffused light and the radiated light are superposed and combined to generate parallel white light for emergence.
In the technical scheme, a diaphragm or a light blocking sheet can be arranged in front of or behind the second focus of the first ellipsoidal reflector and in front of or behind the B focus of the second ellipsoidal reflector, so that stray light is filtered, and the size and the illumination area of an emergent light beam can be controlled. And a diaphragm or a light blocking sheet can be arranged in front of or behind the light emergent collimating mirror to filter out stray light and control the size and the illumination area of the emergent light beam.
The first embodiment is as follows:
as shown in fig. 1, a divergent laser beam emitted from a laser 101 is collected and collimated by a laser collimator 102, and an output collimated laser beam 103 is perpendicularly incident on a laser condenser group 104. The laser condenser group 104 is located between the laser 101 and the dichroic mirror 105. The wavelength of light emitted by the laser is within the range of 400 nm-470 nm.
The laser condenser group 104 may be a single lens, or a combination of a plurality of lenses, or an aspheric lens, or a combination of a spherical lens and an aspheric lens; the lens can be a combination of positive lenses, a combination of positive lenses and negative lenses, or a concave reflecting condenser.
The laser condenser assembly 104 has positive focal power, and the focal length thereof is determined by the central distance between the laser condenser assembly 104 and the dichroic mirror 105 and the distance between the dichroic mirror and the optical wavelength conversion module 107 or the optical diffusion module 111.
In this embodiment, the central optical axis of the laser beam 103 coincides with the central optical axis of the laser condenser lens assembly 104, the laser beam 103 is converged after passing through the laser condenser lens assembly 104, and before being focused, the laser beam is divided into two paths by the dichroic mirror 105, wherein one path is reflected to obtain a reflected converging beam 106, and the other path is transmitted to obtain a transmitted converging beam 110.
The dichroic mirror 105 is located behind the laser condenser lens assembly 104, and is a parallel flat plate or a cube prism including a 45 ° splitting surface, and an optical axis of the dichroic mirror forms a 45 ° included angle with respect to a central optical axis of the condenser lens assembly, where the parallel flat plate includes a first surface and a second surface, and at least one of the surfaces can split incident laser light to allow a part of the incident laser light to be reflected and another part of the incident laser light to be transmitted, and in this embodiment, the first surface is the splitting surface. The ratio of reflection and transmission of the laser beam by the dichroic mirror 105 may be determined according to design requirements, for example, 85% reflection and 15% transmission, and the dichroic mirror may be a cubic prism including a 45 ° splitting plane.
In this embodiment, the converging light beam 106 reflected by the dichroic mirror 105 is focused on the optical wavelength conversion module 107. The optical wavelength conversion module 107 includes an optical wavelength conversion material unit 107a and a material fixing and heat dissipating module 107b, wherein the optical wavelength conversion material unit 107a may be a fluorescent ceramic or other luminescent material. The converging light beam 106 can be focused on the optical wavelength conversion material unit 107a, so that the optical wavelength conversion unit can absorb the laser energy emitted by the laser and radiate the fluorescent light 109 with the wavelength within the range of 470 nm-720 nm.
A first ellipsoidal reflector 108 is disposed at the periphery of the optical wavelength conversion module 107, and the inner surface thereof is plated with a reflective film, such as a metallic silver film or a dielectric film. The first ellipsoidal reflector has a first focus and a second focus, wherein the first focus is close to the bottom end of the ellipsoidal reflector and is opposite to the light outlet of the ellipsoidal reflector. The optical wavelength conversion material unit in the optical wavelength conversion module is disposed on the first focus of the first ellipsoidal reflector 108 or near the first focus. When the optical wavelength conversion material unit is excited by the incident laser, the emitted fluorescent light 109 is reflected by the inner wall of the first ellipsoidal reflector and then is focused to the second focus of the first ellipsoidal reflector. The second focal point of the first ellipsoidal mirror can be located in front of, inside of, or behind the dichroic mirror 105. In the present embodiment, in front of the dichroic mirror 105. The optical axis of the first ellipsoidal mirror 108 is perpendicular to the optical axis of the laser condenser 104.
The converged light beam 110 split and transmitted from the dichroic mirror 105 is focused to the light diffusion module 111. The light diffusion module 111 at least comprises a light diffusion material unit 111a and a diffusion material fixing and heat dissipating module 111 b. The light diffusing material unit 111a has a scattering material and a structure capable of diffusing laser light.
The second ellipsoidal reflector 112 is surrounded on the periphery of the light diffusion module, and the inner surface of the second ellipsoidal reflector is coated with a reflective film, such as a silver metal film or a dielectric film. The second ellipsoidal reflector 112 has an a focus and a B focus, where the a focus is near the bottom end of the second ellipsoidal reflector (opposite the ellipsoidal reflector light exit). The light diffusion material unit 111a in the light diffusion module 111 is disposed at the focus a of the second ellipsoidal reflector or near the focus a. The incident laser irradiates the light diffusion material unit, is scattered by scattering and diffuse reflection, is reflected by the inner wall of the second ellipsoidal reflector 112, and then is converged to the B focus of the second ellipsoidal reflector. The optical axis of the second ellipsoidal reflector 112 coincides with the optical axis of the laser condenser assembly 104.
A light exit collimator 114, which may be a single lens or a group of lenses, is located between the dichroic mirror 105 and the system light exit. The light exiting collimator lens 114 and the second focus of the first ellipsoidal mirror are confocal, i.e. the front focus of the light exiting collimator lens and the second focus of the ellipsoidal mirror coincide. Moreover, the B-focal points of the light exit collimator and the second ellipsoidal mirror are also confocal. The optical axis of the light exit collimator 114 coincides with the optical axis of the first ellipsoidal mirror 108.
The radiant light converged at the second focus by the first ellipsoidal reflector and the diffused light converged at the B focus by the second ellipsoidal reflector are finally overlapped and combined after passing through the light emergent collimator 114, and are mixed to generate parallel white light 115 for emergence.
Example two:
as shown in fig. 2, a divergent laser beam emitted from a laser 101 is collected and collimated by a laser collimator 102, and an output collimated laser beam 103 is perpendicularly incident on a laser condenser group 104. The light beam 103 is converged after passing through the laser condenser lens assembly 104, and before being focused, the light beam is divided into two paths by the dichroic mirror 201, wherein one path is transmitted to obtain a transmitted converging light beam 202, and the other path is reflected to obtain a reflected converging light beam 203.
In this embodiment, the converging light beam 202 transmitted from the dichroic mirror 201 is focused on the optical wavelength conversion module 107. The optical wavelength conversion module 107 includes an optical wavelength conversion material unit, and the converging light beam 202 can be focused on the optical wavelength conversion material unit, so that the optical wavelength conversion unit can absorb the laser energy emitted by the laser and radiate fluorescence 109 with a wavelength within a range of 470nm to 720 nm. In the first embodiment, the first ellipsoidal reflector 108 and the optical wavelength conversion material unit are disposed around the periphery of the optical wavelength conversion module 107, at or near the first focus of the first ellipsoidal reflector 108. The fluorescent light 109 is reflected by the inner wall of the first ellipsoidal mirror and then focused to the second focal point of the first ellipsoidal mirror. The central optical axis of the first ellipsoidal reflector 108 coincides with the optical axis of the laser condenser group 104.
In this embodiment, the converging light beam 203 reflected from the dichroic mirror 201 is focused on the light diffusion module 111. The light diffusion module 111 includes a light diffusion material unit, and the converging light beam 203 can be focused on the light diffusion material unit and diffused by scattering and diffuse reflection to generate the diffused light 113. In the same embodiment, the second ellipsoidal reflector 112 is surrounded on the periphery of the light diffusion module 111, and the light diffusion material unit is disposed at the a focus of the second ellipsoidal reflector 112 or near the a focus. The diffused light 113 is reflected by the inner wall of the second ellipsoidal mirror and then converged to the B-focus of the second ellipsoidal mirror. The central optical axis of the second ellipsoidal reflector 112 is perpendicular to the optical axis of the laser condenser group 104.
The light emergent collimating lens 114 is located between the dichroic mirror 201 and the light outlet of the system, and the light emergent collimating lens 114 and the second focus of the first ellipsoidal reflective mirror are confocal, that is, the front focus of the light emergent collimating lens and the second focus of the ellipsoidal reflective mirror coincide. Moreover, the B-focal points of the light exit collimator and the second ellipsoidal mirror are also confocal. The optical axis of the light exit collimator 114 coincides with the central optical axis of the second ellipsoidal mirror 112.
The radiant light converged at the second focus by the first ellipsoidal reflector and the diffused light converged at the B focus by the second ellipsoidal reflector are finally superposed and combined after passing through the light emergent collimator 114 to generate parallel white light 204 to be emergent
Example three:
as shown in fig. 3, similarly to the first embodiment, the condensed light beam emitted through the laser condenser group is divided into the reflected light beam and the transmitted light beam by the dichroic mirror 105, the reflected light beam deactivates the light wavelength conversion module 107, and the generated radiation light is reflected by the inner wall of the first ellipsoidal mirror 108, condensed to the second focal point of the first ellipsoidal mirror 108, and then collimated by the light exit collimator lens 114 and output. The light beam transmitted by the dichroic mirror 105 is focused on the light diffusion module 111, the generated diffused light is reflected by the inner wall of the second ellipsoidal reflective mirror 112, is converged to the second focal point of the second ellipsoidal reflective mirror 108, is partially reflected by the dichroic mirror 105, enters the emergent light collimating mirror 114, is superposed and combined with the radiation light, and outputs parallel white light 303.
In the present embodiment, a plane mirror 301 is disposed between the laser collimating lens 102 and the laser condenser group 104. Initially, the normal of the plane mirror 301 forms an angle of 45 ° with the optical axis of the laser condenser group 104.
The divergent laser beam emitted from the laser 101 is collected and collimated by the laser collimator 102, and the output collimated laser beam 103 enters the plane mirror 301 at an angle of 45 °, is reflected by the plane mirror 301, is parallel to the optical axis of the laser condenser group 104, and enters the laser condenser group 104.
302 is the coordinate system of the present embodiment, the plane mirror 301 rotates around the direction perpendicular to the optical axis of the laser condenser set, and the rotation angle ranges from 0 to 45 °. When the plane mirror 301 is adjusted to rotate around the Z axis, the position of the laser beam focused on 107 and the light diffusion module 111 can be changed, so that the position of the radiant luminous point and the position of the scattered light point are changed, and finally the emergent angle of the emergent light beam 303 around the Z axis is changed.
When the plane mirror 301 is adjusted to rotate around the X axis, the position of the laser beam focused on the optical wavelength conversion module 107 and the optical diffusion module 111 may be changed, thereby changing the position of the radiation light-emitting point and the position of the scattered light point, and finally changing the exit angle of the exit light beam 303 around the X axis.
Example four:
as shown in fig. 4, similarly to the first embodiment, the condensed light beam emitted from the laser condenser group is divided into a reflected light beam and a transmitted light beam by the dichroic mirror 105, the reflected light beam excites the light wavelength conversion module 107, the fluorescence generated by radiation is reflected by the inner wall of the first ellipsoidal mirror 108, is condensed to the second focal point of the first ellipsoidal mirror 108, is collimated by the light exit collimator 114 and is output, the light beam transmitted from the dichroic mirror 105 is focused to the light diffusion module 111, the generated diffused light is reflected by the inner wall of the second ellipsoidal mirror 112, is condensed to the second focal point of the second ellipsoidal mirror 108, is partially reflected by the dichroic mirror 105, enters the exit collimator 114, is superposed and combined with the fluorescence, and outputs collimated white light 115.
One or more positions of the front or the back of the second focus of the two ellipsoidal reflectors or the front or the back of the light emergent collimating mirror are respectively provided with a diaphragm or a light blocking sheet; specifically, in this embodiment, a diaphragm or light-blocking sheet 401 may be provided in front of or behind the second focus of the first ellipsoidal mirror 108, and a diaphragm or light-blocking sheet 402 may be provided in front of or behind the B focus of the second ellipsoidal mirror 112, to filter out stray light reflected by 108 and the second ellipsoidal mirror 112, while the size and illumination area of the outgoing light beam 115 may be controlled. A diaphragm or light-blocking plate 403 may be disposed in front of the light exit collimator 114, or a diaphragm or light-blocking plate 404 may be disposed behind the light exit collimator 114, to control the size and illumination area of the exit light beam 115.
The invention can also further perform beam transformation on the output white light beam, including compressing the beam size, or enlarging the beam size, or focusing and then collimating, etc., so as to be applied to various illumination occasions.
The invention has various embodiments, and all technical solutions formed by adopting equivalent transformation or equivalent transformation are within the protection scope of the invention.
Claims (8)
1. A refraction and reflection type laser light-emitting device is characterized in that: the device comprises at least one laser diode and a collimating lens matched with the laser diode, a laser condenser group, an optical wavelength conversion module, a light diffusion module, a dichroic mirror, a light emergent collimating mirror, a first ellipsoidal reflector and a second ellipsoidal reflector;
the optical wavelength conversion module is positioned at a first focus of the first ellipsoidal reflector, a second focus of the first ellipsoidal reflector is superposed with an object focus of the light emergent collimating mirror, the optical diffusion module is positioned at a first focus of the second ellipsoidal reflector, a second focus of the second ellipsoidal reflector is superposed with an object focus of the light emergent collimating mirror, and optical axes of the two ellipsoidal reflectors are mutually vertical;
laser emitted by a laser diode is collimated by a collimating lens and then parallelly enters a laser condenser group to form a converged laser beam, one part of the converged laser beam under the action of a dichroic mirror is converged on an optical wavelength conversion module to excite fluorescence with the radiation wavelength within the range of 470 nm-720 nm, the fluorescence is reflected and converged at an object focus by a first ellipsoidal reflector, the other part of the converged laser beam is converged on a light diffusion module to form diffused light, the diffused light is reflected and converged at the object focus by a second ellipsoidal reflector, incident light in two directions is transmitted or reflected by the dichroic mirror and is combined at a light emergent collimating mirror to form mixed parallel light for output.
2. The catadioptric laser light-emitting device of claim 1, wherein: the laser diodes have the same wavelength or a combination of multiple different wavelengths, and the wavelength range of light emitted by the laser diodes is 280-470 nm; the light diffusion module at least comprises a light diffusion material unit and a diffusion material fixing and heat dissipation module.
3. The catadioptric laser light-emitting device of claim 1, wherein: the laser condenser group is a single lens or a combination of a plurality of lenses, or an aspheric lens, or a combination of a spherical lens and an aspheric lens, or a combination of a positive lens and a negative lens, or a concave surface reflection condenser; the focal length of the laser condenser set is determined according to the central distance between the laser condenser set and the dichroic mirror and the distance between the dichroic mirror and the optical wavelength conversion module or the optical diffusion module.
4. The catadioptric laser light-emitting device of claim 1, wherein: the optical wavelength conversion module comprises an optical wavelength conversion material unit and a material fixing and heat dissipation module, wherein the optical wavelength conversion material unit is made of fluorescent ceramic.
5. The catadioptric laser light-emitting device of claim 1, wherein: the dichroic mirror is a parallel flat plate or a cube prism comprising a 45-degree light splitting surface, the optical axis of the dichroic mirror forms a 45-degree included angle relative to the central optical axis of the condenser lens group, the parallel flat plate comprises a first surface and a second surface, and at least one surface can split incident laser to reflect one part and transmit the other part.
6. The catadioptric laser light-emitting device of claim 1, wherein: the light emergent collimating lens is positioned between the dichroic mirror and the light outlet of the system and is a single lens or a lens group, the fluorescent light converged at the second focus by the first ellipsoidal reflector and the diffused light converged at the second focus by the second ellipsoidal reflector can be combined by the light emergent collimating lens and then emitted as parallel light.
7. The catadioptric laser light-emitting device of claim 1, wherein: a plane reflector is arranged between the collimating lens and the laser condenser group, and the included angle between the normal of the plane reflector and the optical axis of the laser condenser group is 45 degrees; divergent laser beams emitted by the laser diode are collected and collimated by the collimating lens, and output collimated laser beams enter the plane mirror at an angle of 45 degrees and are reflected by the plane mirror; the plane mirror rotates around the direction perpendicular to the optical axis of the laser condenser lens group, and the rotation angle range is 0-45 degrees.
8. The catadioptric laser light-emitting device of claim 1, wherein: the convergent light beam emitted by the laser condenser group is divided into a reflected light beam and a transmitted light beam by the dichroic mirror, the reflected light beam excites the light wavelength conversion module, the fluorescence generated by radiation is reflected by the inner wall of the first ellipsoidal reflector, converged to the second focus of the first ellipsoidal reflector and output after being collimated by the light emitting collimator, the light beam transmitted by the dichroic mirror is focused to the light diffusion module, the generated diffused light is reflected by the inner wall of the second ellipsoidal reflector, converged to the second focus of the second ellipsoidal reflector, enters the emergent light collimator after being partially reflected by the dichroic mirror, is superposed and combined with the fluorescence, and parallel white light is output;
one or more positions of the front or back of the second focus of the two ellipsoidal reflectors or the front or back of the light emergent collimating mirror are respectively provided with a diaphragm or a light blocking sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110047652.0A CN112628617A (en) | 2021-01-14 | 2021-01-14 | Refraction and reflection type laser light-emitting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110047652.0A CN112628617A (en) | 2021-01-14 | 2021-01-14 | Refraction and reflection type laser light-emitting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112628617A true CN112628617A (en) | 2021-04-09 |
Family
ID=75294122
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110047652.0A Pending CN112628617A (en) | 2021-01-14 | 2021-01-14 | Refraction and reflection type laser light-emitting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112628617A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114205929A (en) * | 2022-02-15 | 2022-03-18 | 之江实验室 | Infrared optical system for heating suspended nanoparticles |
| CN114706207A (en) * | 2022-04-26 | 2022-07-05 | 重庆大学 | Visible light energy transmission device and wireless energy transmission system using same |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104141923A (en) * | 2013-05-09 | 2014-11-12 | 陶晓培 | Converter for converting laser device into lighting device |
| CN106195671A (en) * | 2016-09-03 | 2016-12-07 | 超视界激光科技（苏州）有限公司 | Laser module |
| CN106195929A (en) * | 2016-09-03 | 2016-12-07 | 超视界激光科技（苏州）有限公司 | Laser light source module |
| CN106773494A (en) * | 2017-03-27 | 2017-05-31 | 李龙 | A kind of optical projection system |
-
2021
- 2021-01-14 CN CN202110047652.0A patent/CN112628617A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104141923A (en) * | 2013-05-09 | 2014-11-12 | 陶晓培 | Converter for converting laser device into lighting device |
| CN106195671A (en) * | 2016-09-03 | 2016-12-07 | 超视界激光科技（苏州）有限公司 | Laser module |
| CN106195929A (en) * | 2016-09-03 | 2016-12-07 | 超视界激光科技（苏州）有限公司 | Laser light source module |
| CN106773494A (en) * | 2017-03-27 | 2017-05-31 | 李龙 | A kind of optical projection system |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114205929A (en) * | 2022-02-15 | 2022-03-18 | 之江实验室 | Infrared optical system for heating suspended nanoparticles |
| CN114205929B (en) * | 2022-02-15 | 2022-08-05 | 之江实验室 | Infrared optical system for heating suspended nanoparticles |
| CN114706207A (en) * | 2022-04-26 | 2022-07-05 | 重庆大学 | Visible light energy transmission device and wireless energy transmission system using same |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11035528B2 (en) | Light emitting device with diffuser and light reflector and projection system having the same | |
| CN105911805B (en) | A kind of compact-sized light-source system | |
| US9791132B2 (en) | Light source and illuminating device | |
| KR101804310B1 (en) | High recycling efficiency solid state light source device | |
| US11209132B2 (en) | Light source device | |
| CN112628617A (en) | Refraction and reflection type laser light-emitting device | |
| CN105676578B (en) | A kind of light-source system of compact conformation | |
| CN108107658B (en) | Light-source system, optical projection system and lighting device | |
| CN106950785B (en) | Light source device and lighting device | |
| EP3255687B1 (en) | Light emitting device | |
| WO2021184842A1 (en) | Illumination device | |
| US10371337B2 (en) | Light-emitting apparatus and lighting apparatus for vehicles including the same | |
| CN209946624U (en) | Projection lighting system utilizing laser induced fluorescence | |
| JP6749084B2 (en) | LED lighting device | |
| CN113671781B (en) | Light emitting unit, light source system, and laser projection apparatus | |
| CN213237059U (en) | Lighting device and lamp | |
| CN111609332A (en) | Laser lighting module | |
| CN112628618A (en) | Hybrid laser light emitting device | |
| CN112628621A (en) | Laser light source device | |
| CN113669650A (en) | Reflecting device and white light laser light source | |
| CN112628616A (en) | Mixed light-emitting device | |
| CN107940268B (en) | Laser module and laser illuminating lamp | |
| CN212156737U (en) | Laser lighting module | |
| CN215446316U (en) | Intelligent automobile headlamp laser light source system | |
| CN217281607U (en) | Laser light source system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210409 |
|
| RJ01 | Rejection of invention patent application after publication |