CN115978470A - Transmission type wavelength conversion structure and application thereof - Google Patents
Transmission type wavelength conversion structure and application thereof Download PDFInfo
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- CN115978470A CN115978470A CN202211570932.0A CN202211570932A CN115978470A CN 115978470 A CN115978470 A CN 115978470A CN 202211570932 A CN202211570932 A CN 202211570932A CN 115978470 A CN115978470 A CN 115978470A
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Abstract
The invention discloses a transmission-type wavelength conversion structure and application thereof, wherein the transmission-type wavelength conversion structure comprises a laser antireflection film, a transparent heat sink substrate, an optical film for transmitting laser reflected received light, a scattering layer and a wavelength conversion layer which are sequentially stacked, wherein the scattering layer is formed by high-temperature curing of scattering particles and a packaging body, and the mass ratio of the scattering particles to the packaging body is (0.1-1): 1, the thickness of the scattering layer is 3-30 μm, and the particle size of the scattering particles is 0.01-0.5 μm. The transmission type wavelength conversion structure can change the incident laser energy distribution, the phenomenon of a fluorescent light spot 'yellow circle' is inhibited, the uniformity of the light spot is increased, and meanwhile, the overall illumination, luminous flux and other properties of a light source are not weakened basically or the weakening amplitude is very small, so that the light effect is ensured while the problem of the light spot 'Huang Guangjuan' of transmission type laser illumination is effectively solved.
Description
Technical Field
The invention relates to the field of wavelength conversion materials and devices thereof, in particular to a transmission type wavelength conversion structure and application thereof.
Background
Currently, the light source used for laser illumination is blue laser. In the transmission-type laser light source, blue laser irradiated on the wavelength conversion material has a certain spot size, and the energy is in gaussian distribution: the energy of blue light in the irradiation area in the center is high; the blue light energy deviating from the central area of the light spot is low, on one hand, the blue light energy is caused by the Gaussian distribution characteristic of the blue laser, on the other hand, the blue light energy is lost due to the fact that the blue light is scattered and attenuated in the wavelength conversion material along the direction vertical to the incident direction, and finally, the blue light at the central position excited by the laser in the wavelength conversion material is more and less, so that the fluorescent light spot is white/blue in the middle and yellow at the periphery, namely, the phenomenon of Huang Guangjuan is caused, and the uniformity of the light spot is greatly influenced. In particular, in a high laser power light source, the phenomenon of the spot "Huang Guangjuan" is more remarkable.
Aiming at the problem of light spot Huang Guangjuan, in the prior art, the size of a wavelength conversion material is reduced to be close to the size of a laser light spot by reducing the size of the wavelength conversion material, so that blue laser only generates longitudinal excitation, lateral excitation is greatly weakened, and the phenomenon of a light spot yellow circle is restrained. However, after the wavelength conversion material is reduced, the heat conduction and heat dissipation performance of the material are deteriorated, so that the use reliability of the wavelength conversion material is obviously reduced; in addition, the coaxiality of the small-sized wavelength conversion material and the laser spot in the light source is difficult to control, and the spot still has the phenomenon of uneven color. In particular, the phenomenon of "Huang Guangjuan" is more pronounced in a transmission-type laser illumination system.
Disclosure of Invention
The invention aims to overcome at least one defect of the prior art, and provides a transmission type wavelength conversion structure which is used for solving the problem that a yellow circle appears in a light spot in a transmission type laser illumination scheme, and the transmission type wavelength conversion structure is good in light spot uniformity, small in blue light loss, and high in luminous flux and illumination.
The technical scheme adopted by the invention is as follows:
a transmission type wavelength conversion structure comprises a laser antireflection film, a transparent heat sink substrate, an optical film for transmitting laser reflected received laser, a scattering layer and a wavelength conversion layer which are sequentially stacked, wherein the scattering layer is formed by high-temperature curing of scattering particles and a packaging body, and the mass ratio of the scattering particles to the packaging body is (0.1-1): 1, the thickness of the scattering layer is 3-30 mu m, and the particle size of the scattering particles is 0.01-0.5 mu m.
Further, the scattering particles are one or a mixture of several of titanium oxide, aluminum oxide, barium sulfate, magnesium oxide and zinc oxide.
Further, the packaging body is one or a mixture of several of high-light-transmittance organic glue, inorganic glue and glass glue.
Further, the high light transmittance is not less than 95% of light transmittance to a 400-800 nm waveband.
Further, the thickness of the scattering layer is 3-15 μm.
Further, the mass ratio of the scattering particles to the package is (0.1 to 0.5): 1.
further, the particle size of the scattering particles is 0.01 to 0.2 μm.
Further, the transparent heat sink substrate is a sapphire sheet.
Use of the transmissive wavelength converting structure in a laser illumination system.
Further, the laser illumination system comprises a laser generating device, a laser converging lens assembly arranged on the light path of the laser emitted by the laser generating device, the transmission type wavelength conversion structure and an illumination light collecting lens assembly.
Compared with the prior art, the invention has the beneficial effects that: according to the invention, the specific scattering layer is additionally arranged between the wavelength conversion layer and the transparent heat sink substrate, the scattering layer changes the incident laser energy distribution, the Gaussian characteristic of the incident laser energy distribution is weakened, the energy distribution is broadened, the incident laser energy distribution is changed into weak Gaussian or flat-angle distribution, the phenomenon of a fluorescent light spot 'yellow light ring' is inhibited, and the uniformity of the light spot is increased. Meanwhile, by controlling the concentration and the particle size of scattering particles in the scattering layer, the energy of blue light is basically not reduced or is reduced very little, most of blue laser still penetrates through the scattering layer to excite the wavelength conversion material, the performances of the overall illumination, the luminous flux and the like of the light source are basically not weakened or are weakened very little, and the light effect is ensured while the problem of a light spot Huang Guangjuan of transmission type laser illumination is effectively solved.
Drawings
FIG. 1 is a simplified schematic diagram of a transmissive wavelength converting structure according to an embodiment of the present invention.
Detailed Description
For the sake of brevity, only some numerical ranges are explicitly disclosed herein. However, any lower limit may be combined with any upper limit to form ranges not explicitly recited; and any lower limit may be combined with any other lower limit to form a range not explicitly recited, and similarly any upper limit may be combined with any other upper limit to form a range not explicitly recited. Also, although not explicitly recited, each point or individual value between endpoints of a range is encompassed within the range. Thus, each point or individual value can form a range not explicitly recited as its own lower or upper limit in combination with any other point or individual value or in combination with other lower or upper limits.
In the description herein, it is to be noted that, unless otherwise specified, "above" and "below" are inclusive, and "a plurality" of "one or more" means two or more.
The above summary of the present application is not intended to describe each disclosed embodiment or every implementation of the present application. The following description more particularly exemplifies illustrative embodiments. At various points throughout this application, guidance is provided through a list of embodiments that can be used in various combinations. In each instance, the list is provided only as a representative group and should not be construed as exhaustive.
In the research process, the inventor finds that laser illumination has the advantages of high brightness, long irradiation distance and the like, but the uniformity of the light spot is insufficient. In particular, for the transmissive laser illumination scheme, the problems of Huang Guangjuan and yellow edge have been technical problems difficult to be effectively overcome by the industry. In order to solve the problem of yellow aperture, the most common practice is mainly as follows: (1) adopting a method of reducing the size of the wavelength conversion material; and (2) diffusing and homogenizing the light by adopting an optical element. However, with the solution of solution (1) in which the size of the wavelength converting material is reduced, since the wavelength converting material is small in size, the heat conducting property and the heat dissipating property of the material are deteriorated, resulting in deterioration of the reliability of the use of the wavelength converting device as a whole. For the scheme (2) of adopting the optical element for diffusion and light homogenization, the existence of the optical element can cause light loss, particularly, the illumination is obviously reduced, the light effect is influenced, the technical effect of laser high-brightness illumination is greatly influenced, and the original high-illumination advantage of the laser illumination is sharply reduced.
The present application has been made based on the discovery and study of the above-mentioned problems.
The application provides a transmission-type wavelength conversion structure on the one hand, including laser antireflection coating, transparent heat sink base plate, transmission laser reflection optical film, scattering layer and the wavelength conversion layer that stacks gradually the setting, the scattering layer is formed by scattering particle and encapsulation body high temperature solidification, and the mass ratio of scattering particle and encapsulation body is (0.1 ~ 1): 1, the thickness of the scattering layer is 3-30 mu m, and the particle size of the scattering particles is 0.01-0.5 mu m.
According to the technical scheme, the specific scattering layer is additionally arranged between the wavelength conversion layer and the transparent heat sink substrate, the energy distribution of incident laser is changed by the scattering layer, blue laser is taken as an example, the Gaussian characteristic of the blue laser is weakened, the energy distribution is broadened, the blue laser is changed into weak Gaussian or flat angle distribution, the phenomenon of 'yellow circle' of a fluorescent light spot is inhibited, and the uniformity of the light spot is increased. More specifically, the reason why the energy distribution of the blue laser can be changed through the scattering layer is that the blue light is scattered in a diffraction manner inside the scattering layer by controlling the particle size (preferably 0.01-0.5 um, more preferably 0.01-0.2 um) of scattering particles inside the scattering layer in the scheme and is incident on the wavelength conversion device layer at a certain angle deviated from the incident direction, so that the blue light is scattered, the phenomenon that the power density of the blue light at the center of a light spot is high is weakened, and the energy of the blue light is changed from the original gaussian distribution into weak gaussian distribution or even flat angle distribution. In addition, the scattering particles in the scattering layer scatter the blue light, so that the incident angle luminescence is changed, and the energy loss of the incident blue light is caused. Experiments prove that the optimal thickness of the scattering layer is 3-30 um, and more preferably 3-15 um; the mass ratio of the scattering particles to the package is preferably (0.1-1): 1, more preferably (0.1 to 0.5): 1, within the thickness and concentration range, the uniformity of the light spot color and the luminous efficiency can be simultaneously considered.
In any embodiment, the scattering particles are one or a mixture of titanium oxide, aluminum oxide, barium sulfate, magnesium oxide and zinc oxide.
In any embodiment, the package body is one or a mixture of several of high-light-transmittance organic glue, inorganic glue and glass glue.
In any embodiment, the high light transmittance is not less than 95% of light transmittance in the 400-800 nm band.
Further, the thickness of the scattering layer is 3 to 15 μm. Through experiments, the blue light loss and the light flux loss of the light source are small and the yellow circle phenomenon basically disappears when the thickness of the scattering layer is 3-15 mu m.
Furthermore, the mass ratio of the scattering particles to the package is (0.1-0.5): 1. through a plurality of experiments, when the mass ratio of the particles to the packaging body is (0.1-0.5): 1, the yellow circle substantially or completely disappears.
Further, the scattering particles have a particle size of 0.01 to 0.2 μm.
In any embodiment, the transparent heat sink substrate is a sapphire sheet.
The application discloses transmission-type wavelength conversion structure can be applied to laser lighting system, transmission-type wavelength conversion structure can receive laser with laser at least partial conversion, and the laser that is not converted and receive the laser mixture and form the illumination light.
Examples
The present disclosure is more particularly described in the following examples that are intended as illustrative only, since various modifications and changes within the scope of the present disclosure will be apparent to those skilled in the art. Unless otherwise stated, all parts, percentages, and ratios reported in the following examples, unless otherwise specified, are on a weight basis, and all reagents used in the examples are commercially available or synthesized according to conventional methods and can be used directly without further treatment, and the equipment used in the examples is commercially available.
The transparent heat sink substrates in the following embodiments are all sapphire sheets, the laser antireflection film in the following embodiments is an AR blue light antireflection film, and the optical film that transmits laser light reflected by laser light in the following embodiments is a yellow-reflecting blue-transmitting film. The AR blue light antireflection film, the sapphire sheet, and the yellow-reflecting blue-transmitting film are sequentially stacked and commercially available.
The scattering layer described in the following example is prepared by a self-making method: weighing 1-5 parts of scattering particles and 10 parts of organic silica gel according to parts by mass, and adding the scattering particles and the organic silica gel into an agate mortar. Firstly, manually grinding for 10-30 min, then putting the mixture into a planetary stirring bubble-discharging machine, and continuously stirring for 2 cycles at the rotating speed of 800-1200 rpm/min, wherein each cycle is 5min to obtain mixed slurry with uniformly dispersed scattering particles in organic silica gel. And coating the mixed slurry on the surface of the transparent sapphire substrate in a blade coating, dispensing, screen printing and other modes. And (3) placing the transparent sapphire substrate with the surface coated with the scattering layer slurry into a drying oven at 120 ℃, and pre-baking for 20min to ensure that the scattering layer on the surface layer of the transparent heat-conducting substrate has certain hardness and can meet the requirement of coating a wavelength conversion layer on the surface.
The wavelength conversion layer described in the following example was made by a homemade method: 3-6 parts of fluorescent powder particles and 1 part of organic silica gel are weighed according to parts by mass and added into an agate mortar. Firstly, manually grinding for 10-15 min, then putting the mixture into a planetary stirring bubble-discharging machine, and continuously stirring for 2 cycles at the rotating speed of 800-1200 rpm/min, wherein each cycle is 5min, so as to obtain the mixed fluorescent slurry with the fluorescent powder particles uniformly dispersed in the organic silica gel. And coating the mixed fluorescent slurry on the surface of the scattering layer in a blade coating, dispensing, screen printing and other modes, placing the transparent sapphire substrate coated with the wavelength conversion layer and the scattering layer slurry on the surface in a drying oven at 150 ℃, and pre-baking for 2-6 hours to cure the wavelength conversion layer and the scattering layer and firmly adhere the wavelength conversion layer and the scattering layer to the surface of the transparent sapphire substrate.
The structures of the laser antireflection film 1, the transparent heat sink substrate 2, and the optical film 3 that transmits laser light and reflects received laser light, which are stacked in the following examples, are commercially available.
Example 1
As shown in fig. 1, the present embodiment discloses a transmissive wavelength conversion structure, which includes a laser antireflection film 1, a transparent heat sink substrate 2, an optical film 3 that transmits laser light and reflects received laser light, a scattering layer 4, and a wavelength conversion layer 5, which are sequentially stacked, where the scattering layer 4 is formed by high-temperature curing of scattering particles and a package, and a mass ratio of the scattering particles to the package is (0.1-0.2): 1, the thickness of the scattering layer is 3-8 μm, and the particle size of the scattering particles is 0.01-0.2 μm.
More specifically, in the present embodiment, the scattering particles are barium sulfate.
More specifically, in this embodiment, the package is a methyl silica gel having a refractive index of 1.54 and a transmittance of 97% in a visible light band of 400 to 800 nm.
Example 2
As shown in fig. 1, the present embodiment discloses a transmissive wavelength conversion structure, which includes a laser antireflection film 1, a transparent heat sink substrate 2, an optical film 3 that transmits laser light and reflects received laser light, a scattering layer 4, and a wavelength conversion layer 5, which are sequentially stacked, where the scattering layer 4 is formed by high-temperature curing of scattering particles and a package, and a mass ratio of the scattering particles to the package is (0.3-0.5): 1, the thickness of the scattering layer is 3-8 μm, and the particle size of the scattering particles is 0.01-0.2 μm.
More specifically, in the present embodiment, the scattering particles are barium sulfate.
More specifically, in this embodiment, the package is a methyl silica gel having a refractive index of 1.54 and a transmittance of 97% in a visible light band of 400 to 800 nm.
Example 3
As shown in fig. 1, the present embodiment discloses a transmissive wavelength conversion structure, which includes a laser antireflection film 1, a transparent heat sink substrate 2, an optical film 3 that transmits laser light and reflects received laser light, a scattering layer 4, and a wavelength conversion layer 5, which are sequentially stacked, where the scattering layer 4 is formed by high-temperature curing of scattering particles and a package, and a mass ratio of the scattering particles to the package is (0.1-0.2): 1, the thickness of the scattering layer is 9-15 mu m, and the particle size of the scattering particles is 0.01-0.2 mu m.
More specifically, in the present embodiment, the scattering particles are barium sulfate.
More specifically, in this embodiment, the package is a methyl silica gel having a refractive index of 1.54 and a transmittance of 97% in a visible light band of 400 to 800 nm.
Example 4
As shown in fig. 1, the present embodiment discloses a transmissive wavelength conversion structure, which includes a laser antireflection film 1, a transparent heat sink substrate 2, an optical film 3 that transmits laser light and reflects received laser light, a scattering layer 4, and a wavelength conversion layer 5, which are sequentially stacked, where the scattering layer 4 is formed by high-temperature curing of scattering particles and a package, and a mass ratio of the scattering particles to the package is (0.3-0.5): 1, the thickness of the scattering layer is 9-15 μm, and the particle size of the scattering particles is 0.01-0.2 μm.
More specifically, in the present embodiment, the scattering particles are barium sulfate.
More specifically, in this embodiment, the package is a methyl silica gel having a refractive index of 1.54 and a transmittance of 97% in a visible light band of 400 to 800 nm.
Example 5
As shown in fig. 1, the present embodiment discloses a transmissive wavelength conversion structure, which includes a laser antireflection film 1, a transparent heat sink substrate 2, an optical film 3 that transmits laser light and reflects received laser light, a scattering layer 4, and a wavelength conversion layer 5, which are sequentially stacked, where the scattering layer 4 is formed by high-temperature curing of scattering particles and a package, and a mass ratio of the scattering particles to the package is (0.1-0.2): 1, the thickness of the scattering layer is 16-30 μm, and the particle size of the scattering particles is 0.01-0.2 μm.
More specifically, in the present embodiment, the scattering particles are barium sulfate.
More specifically, in this embodiment, the package is a methyl silica gel having a refractive index of 1.54 and a transmittance of 97% in a visible light band of 400 to 800 nm.
Example 6
As shown in fig. 1, the present embodiment discloses a transmissive wavelength conversion structure, which includes a laser antireflection film 1, a transparent heat sink substrate 2, an optical film 3 that transmits laser light and reflects received laser light, a scattering layer 4, and a wavelength conversion layer 5, which are sequentially stacked, where the scattering layer 4 is formed by high-temperature curing of scattering particles and a package, and a mass ratio of the scattering particles to the package is (0.3-0.5): 1, the thickness of the scattering layer is 16-30 mu m, and the particle size of the scattering particles is 0.01-0.2 mu m.
More specifically, in the present embodiment, the scattering particles are barium sulfate.
More specifically, in this embodiment, the package is a methyl silica gel having a refractive index of 1.54 and a transmittance of 97% in a visible light band of 400 to 800 nm.
Example 7
As shown in fig. 1, the present embodiment discloses a transmissive wavelength conversion structure, which includes a laser antireflection film 1, a transparent heat sink substrate 2, an optical film 3 that transmits laser light and reflects received laser light, a scattering layer 4, and a wavelength conversion layer 5, which are sequentially stacked, where the scattering layer 4 is formed by high-temperature curing of scattering particles and a package, and a mass ratio of the scattering particles to the package is (0.1-0.2): 1, the thickness of the scattering layer is 3-8 μm, and the particle size of the scattering particles is 0.01-0.2 μm.
More specifically, in the present embodiment, the scattering particles are alumina.
More specifically, in this embodiment, the package is an inorganic adhesive with a refractive index of 1.47 and a transmittance of 96% in a visible light band of 400 to 800 nm.
Example 8
As shown in fig. 1, this embodiment discloses a transmissive wavelength conversion structure, which includes a laser antireflection film 1, a transparent heat sink substrate 2, an optical film 3 for transmitting laser light and reflecting stimulated light, a scattering layer 4, and a wavelength conversion layer 5, which are sequentially stacked, where the scattering layer 4 is formed by high-temperature curing of scattering particles and an encapsulant, and a mass ratio of the scattering particles to the encapsulant is (0.15-0.35): 1, the thickness of the scattering layer is 6-10 μm, and the particle size of the scattering particles is 0.01-0.2 μm.
More specifically, in the present embodiment, the scattering particles are barium sulfate.
More specifically, in this embodiment, the package is a methyl silica gel having a refractive index of 1.54 and a transmittance of 97% in a visible light band of 400 to 800 nm.
Example 9
As shown in fig. 1, this embodiment discloses a transmissive wavelength conversion structure, which includes a laser antireflection film 1, a transparent heat sink substrate 2, an optical film 3 for transmitting laser light and reflecting stimulated light, a scattering layer 4, and a wavelength conversion layer 5, which are sequentially stacked, where the scattering layer 4 is formed by high-temperature curing of scattering particles and an encapsulant, and a mass ratio of the scattering particles to the encapsulant is (0.45-0.8): 1, the thickness of the scattering layer is 6-10 mu m, and the particle size of the scattering particles is 0.25-0.4 mu m.
More specifically, in the present embodiment, the scattering particles are barium sulfate.
More specifically, in this embodiment, the package is a methyl silica gel having a refractive index of 1.54 and a transmittance of 97% in a visible light band of 400 to 800 nm.
Example 10
As shown in fig. 1, the present embodiment discloses a transmissive wavelength conversion structure, which includes a laser antireflection film 1, a transparent heat sink substrate 2, an optical film 3 that transmits laser light and reflects received laser light, a scattering layer 4, and a wavelength conversion layer 5, which are sequentially stacked, where the scattering layer 4 is formed by high-temperature curing of scattering particles and a package, and a mass ratio of the scattering particles to the package is (0.7-1): 1, the thickness of the scattering layer is 12-18 mu m, and the particle size of the scattering particles is 0.2-0.5 mu m.
More specifically, in the present embodiment, the scattering particles are barium sulfate.
More specifically, in this embodiment, the package is a methyl silica gel having a refractive index of 1.54 and a transmittance of 97% in a visible light band of 400 to 800 nm.
Comparative example 1
A transmission type wavelength conversion structure comprises a laser antireflection film, a transparent heat sink substrate, an optical film and a wavelength conversion layer, wherein the optical film is used for transmitting laser and reflecting received laser. Comparative example 1 is different from example 1 in that comparative example 1 is not provided with a scattering layer.
Comparative example 2
A transmission type wavelength conversion structure comprises a laser antireflection film 1, a transparent heat sink substrate 2, an optical film 3 for transmitting laser reflected received laser, a scattering layer 4 and a wavelength conversion layer 5 which are sequentially stacked, wherein the scattering layer 4 is formed by high-temperature curing of scattering particles and a packaging body, and the mass ratio of the scattering particles to the packaging body is (2-4): 1, the thickness of the scattering layer is 3-8 μm, and the particle size of the scattering particles is 0.01-0.2 μm.
Comparative example 2 is different from example 2 in that the mass ratio of the scattering particles to the package in the scattering layer of comparative example 2 is different from example 2.
Comparative example 3
A transmission type wavelength conversion structure comprises a laser antireflection film 1, a transparent heat sink substrate 2, an optical film 3 for transmitting laser reflected received laser, a scattering layer 4 and a wavelength conversion layer 5 which are sequentially stacked, wherein the scattering layer 4 is formed by high-temperature curing of scattering particles and a packaging body, and the mass ratio of the scattering particles to the packaging body is (0.3-0.5): 1, the thickness of the scattering layer is 40-80 μm, and the particle size of the scattering particles is 0.01-0.2 μm.
Comparative example 3 is different from example 2 in that the thickness of the scattering layer of comparative example 3 is different from that of example 2.
Comparative example 4
A transmission type wavelength conversion structure comprises a laser antireflection film 1, a transparent heat sink substrate 2, an optical film 3 for transmitting laser reflected received laser, a scattering layer 4 and a wavelength conversion layer 5 which are sequentially stacked, wherein the scattering layer 4 is formed by high-temperature curing of scattering particles and a packaging body, and the mass ratio of the scattering particles to the packaging body is (0.3-0.5): 1, the thickness of the scattering layer is 3-8 μm, and the particle size of the scattering particles is 1-2 μm.
Comparative example 4 is different from example 2 in that the particle size of the scattering particles in the scattering layer of comparative example 4 is different from that of example 2.
Testing of
The transmissive wavelength conversion structures described in examples 1 to 10 and comparative examples 1 to 4 above are all transmissive color wheel device structures, and the transmissive wavelength conversion structures of examples 1 to 10 and comparative examples 1 to 4 above were subjected to performance tests, the test results are shown in table 1, and the test methods are as follows:
the fluorescent color wheel was irradiated with laser light having a laser power of 100W, and the rotational speed of the color wheel was set to 7200rpm/min. When only the scattering layer is arranged on the surface layer of the test substrate and the wavelength conversion layer is not arranged, the blue light power loss ratio of the transmission light source of the color wheel device assembly is tested, the light flux of the transmission light source assembled by the color wheel device with the scattering layer and the wavelength conversion layer, the central illumination of the light spots on the upper wall are observed, and the light spot effect on the upper wall is observed. The test method for each data is as follows:
(1) Blue light power loss ratio test: the laser light source with the blue light power of 100w is adopted, the laser spot size is phi 2.5mm, and the energy is in Gaussian distribution; the transmission light source is respectively installed on the color wheel devices which only have scattering layers and do not have wavelength conversion layers in the embodiments 1 to 10 and the comparative examples 2 to 4, and the blue light power output by the color wheel devices is tested by a laser power meter and is marked as W; for comparison, a transparent substrate without a scattering layer and a wavelength conversion layer is mounted with the transmission light source, the output blue light power is tested by a laser power meter, and the power is calibrated as W 0 (ii) a Then (W) 0 -W)/W 0 I.e. the blue power loss ratio.
(2) And (3) testing luminous flux: the laser light source with the blue light power of 100w is adopted, the laser spot size is phi 2.5mm, and the energy is in Gaussian distribution; the color wheel device in the embodiment 1 to the embodiment 10 and the comparative example 1 to the comparative example 4 is provided with a laser light source, the laser light source is lightened, a light outlet of the light source is aligned with an entrance of an integrating sphere, so that light rays completely enter the integrating sphere, and the light flux of the color wheel device is tested.
(3) Testing the central illumination of the light spot: the laser light source with the blue light power of 100w is adopted, the laser spot size is phi 2.5mm, and the energy is in Gaussian distribution; the laser light source of the color wheel device in the embodiment 1 to the embodiment 8 and the comparative example 1 to the comparative example 4 is lightened, and the central illumination of the light spot on the upper wall of the color wheel device is tested under a 130mm collimating lens at a distance of 10 m.
(4) The phenomenon of yellow light ring of light spot on the upper wall: visual inspection was carried out.
TABLE 1
Example 11
A laser lighting system comprises a laser generating device, a laser converging lens assembly, a transmission type wavelength conversion structure and a lighting light collecting lens assembly, wherein the laser converging lens assembly is arranged on a light path of laser emitted by the laser generating device, the laser generating device is used for emitting laser beams, the laser converging lens assembly is used for converging the laser beams onto the transmission type wavelength conversion structure, the transmission type wavelength conversion structure converts at least part of the laser into receiving laser, the unconverted laser and the collecting light are mixed to form lighting light, and the lighting light collecting lens assembly is used for collecting mixed light to achieve high-brightness lighting of the laser.
It should be understood that the above-mentioned embodiments of the present invention are only examples for clearly illustrating the technical solutions of the present invention, and are not intended to limit the specific embodiments of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention claims should be included in the protection scope of the present invention claims.
Claims (10)
1. A transmission type wavelength conversion structure is characterized by comprising a laser antireflection film, a transparent heat sink substrate, an optical film for transmitting laser reflected received light, a scattering layer and a wavelength conversion layer which are sequentially stacked, wherein the scattering layer is formed by high-temperature curing of scattering particles and a packaging body, and the mass ratio of the scattering particles to the packaging body is (0.1-1): 1, the thickness of the scattering layer is 3-30 μm, and the particle size of the scattering particles is 0.01-0.5 μm.
2. The transmissive wavelength converting structure according to claim 1, wherein the scattering particles are one or a mixture of titanium oxide, aluminum oxide, barium sulfate, magnesium oxide, and zinc oxide.
3. The structure of claim 1, wherein the package is one or a mixture of organic glue, inorganic glue and glass glue with high light transmittance.
4. The transmissive wavelength converting structure according to claim 3, wherein the high light transmittance is not less than 95% for light transmittance in a wavelength band of 400 to 800 nm.
5. The transmissive wavelength converting structure according to claim 1, wherein the scattering layer has a thickness of 3 to 15 μm.
6. The transmissive wavelength converting structure according to claim 1, wherein the mass ratio of the scattering particles to the encapsulant is (0.1-0.5): 1.
7. the transmissive wavelength converting structure according to claim 1, wherein the scattering particles have a particle size of 0.01 to 0.2 μm.
8. The transmissive wavelength conversion structure of claim 1, wherein the transparent heat sink substrate is a sapphire sheet.
9. Use of a transmissive wavelength converting structure according to any one of claims 1 to 8 in a laser illumination system.
10. Use according to claim 9, wherein the laser illumination system comprises a laser generating device, a laser converging lens assembly arranged in the optical path of the laser light emitted by the laser generating device, the transmissive wavelength converting structure according to any one of claims 1 to 8, and an illumination light collecting lens assembly.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119222525A (en) * | 2023-06-29 | 2024-12-31 | 深圳市光粒子技术有限公司 | Laser source system |
| WO2025001626A1 (en) * | 2023-06-25 | 2025-01-02 | 广州光联电子科技有限公司 | Light source system |
| CN120320152A (en) * | 2025-06-16 | 2025-07-15 | 华中科技大学 | An inorganic fluorescent conversion element for laser lighting and display and its preparation and application |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2025001626A1 (en) * | 2023-06-25 | 2025-01-02 | 广州光联电子科技有限公司 | Light source system |
| CN119222525A (en) * | 2023-06-29 | 2024-12-31 | 深圳市光粒子技术有限公司 | Laser source system |
| WO2025001625A1 (en) * | 2023-06-29 | 2025-01-02 | 广州光联电子科技有限公司 | Laser light source system |
| CN120320152A (en) * | 2025-06-16 | 2025-07-15 | 华中科技大学 | An inorganic fluorescent conversion element for laser lighting and display and its preparation and application |
| CN120320152B (en) * | 2025-06-16 | 2025-08-29 | 华中科技大学 | Inorganic fluorescent conversion element for laser illumination and display, and preparation and application thereof |
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