Light source system

Abstract

A light source system, comprising: a first laser light source (1), a second laser light source (2), a wavelength conversion device (3), a light exit lens (4), and a light splitting filter (5); a first lens assembly (6) is provided between the light splitting filter (5) and the wavelength conversion device (3); a light-transmitting scatterer (7) and a second lens assembly (8) are further provided between the second laser light source (2) and the light splitting filter (5); the light-transmitting scatterer (7) comprises a scattering layer; the scattering layer comprises a package and scattering particles; a first diffusion sheet (9) and a second diffusion sheet (10) are respectively provided between the light splitting filter (5) and the first laser light source (1) and between the light splitting filter (5) and the second laser light source (2); the diffusion degree of the second diffusion sheet (10) is 3-8 times that of the first diffusion sheet (9); and the optical properties of the first lens assembly (6) and the second lens assembly (8) are the same.

Description

Light source system Technical Field

[0001] The present invention relates to the field of laser technology, and more particularly, to a light source system. Background Art

[0002] Currently, the primary light source used in display and lighting devices on the market is LED. The excitation light from LED light sources exhibits a flat-angle distribution: the excitation light energy is evenly distributed within the spot size, resulting in a uniform fluorescent light beam and a uniform light spot on the wall. However, LED light sources suffer from insufficient illumination and a limited illumination range. Lasers (LDs) are a newly emerging light source, offering advantages such as high energy density and a long illumination range. In display and lighting devices using LD laser light sources, the laser energy emitted exhibits a Gaussian distribution: the laser energy is high at the center of the spot and decreases away from the center. Therefore, the fluorescent light beam generated by wavelength conversion materials using LD lasers with a Gaussian distribution as the excitation source can exhibit the following issues: a high proportion of blue light is present at the center of the laser light, while a low proportion is present away from the center. This results in the light spot on the wall appearing whitish / bluish in the center and yellowish around the edges, a phenomenon known as a "yellow halo," which significantly affects the uniformity of the light spot. In some beam light application scenarios, the fluorescent beam is required to be uniform white light. However, the fluorescent beam that directly uses Gaussian-distributed LD as the excitation light source exhibits the problem of "blue in the center and yellow at the edges", which greatly affects the lighting effect.

[0003] To address the "blue center, yellow edges" beam problem and the "yellow halo" problem of the light spot on the wall caused by laser lighting sources, existing technical solutions include the use of reflective bowls: by shining fluorescent light onto the reflective bowl, the reflective bowl evens the light before the beam is emitted. While this solution can significantly improve the "blue center, yellow edges" problem, the evenness of the fluorescent beam significantly reduces the illumination at the center of the spot, shortening the illumination range of the light source, and losing the advantages of laser light sources as luminous sources. In other technical cases, evenness devices such as light rods and compound eyes are used to break up the Gaussian laser beam into flat-angle light, evenly treating the excitation light. This achieves uniform distribution of the fluorescent beam, but it also significantly weakens the illumination at the center of the spot and significantly shortens the illumination range of the laser light source. In other technical cases, there are also designs using dichroic mirrors, but these still cannot achieve the ideal uniform white light effect.

[0004] Summary of the Invention

[0005] The present invention aims to overcome at least one of the above-mentioned defects of the prior art and provide a light source system having the effects of high brightness, high illumination and uniform light spot.

[0006] The technical solution adopted by the present invention is as follows:

[0007] A light source system, comprising:

[0008] A first laser light source, configured to emit a first laser;

[0009] A second laser light source, configured to emit a second laser;

[0010] a wavelength conversion device for converting at least part of the first laser light into a converted light;

[0011] Light-emitting lens, used for emitting light;

[0012] A spectroscopic filter is arranged obliquely in the emission direction of the first laser and the second laser, and is used to guide the first laser to the wavelength conversion device and guide the converted laser and the second laser to the light output lens;

[0013] A first lens assembly is provided between the spectroscopic filter and the wavelength conversion device;

[0014] A light-transmitting scatterer and a second lens assembly are further provided between the second laser light source and the spectroscopic filter; the light-transmitting scatterer comprises a scattering layer having a thickness of 8 to 60 μm, the scattering layer comprising an encapsulation body and scattering particles, wherein the mass ratio of the encapsulation body to the scattering particles is 1:1 to 10:1, and the scattering particles are powders in which particles with a particle size of 10 to 500 nm account for more than 60% by mass;

[0015] A first diffuser and a second diffuser are respectively provided between the spectroscopic filter and the first laser light source and the second laser light source, and the diffusion degree of the second diffuser is 3 to 8 times that of the first diffuser;

[0016] The first lens assembly and the second lens assembly have the same optical performance.

[0017] Furthermore, the diffusion degree of the second diffuser is 3 to 9 degrees.

[0018] Furthermore, the light-transmitting scatterer is located between the second laser light source and the second lens assembly, and the light-transmitting scatterer also includes a scattering substrate for carrying the scattering layer, and the scattering substrate is located on a side close to the second laser light source.

[0019] Furthermore, the scattering substrate is made of glass, quartz or sapphire with a transmittance of more than 80% in the 440-465 nm wavelength band.

[0020] Furthermore, the scattering substrate is a single-sided or double-sided microstructure, or is a scattering substrate that has been atomized.

[0021] Furthermore, the scattering particles are one or more combinations of barium sulfate, titanium oxide, zirconium oxide, zinc oxide, lithopone, aluminum oxide, silicon oxide, hollow glass microspheres, hollow ceramic microspheres or hollow resin microspheres.

[0022] Furthermore, the package body is organic silica gel, inorganic silicon oxide or Si / B / Zn / Al / Na / K / O series glass powder.

[0023] Furthermore, the first laser light source and the second laser light source are both blue lasers and the power of the first laser light source is greater than that of the second laser light source. The spectroscopic filter is a spectroscopic filter that reflects blue light and transmits yellow light. The wavelength conversion device converts at least part of the first laser into yellow light.

[0024] Furthermore, the surface of the spectroscopic filter is coated with a laser-resistant film, and the film system of the laser-resistant film is designed to meet the following requirements at an incident angle of 40-50° and a wavelength range of 430-465nm: average reflectivity (Ravg)>99.5%, minimum reflectivity (Rmin)>99.0%; at an incident angle of 40-50° and a wavelength range of 485-700nm: average transmittance (Tavg)>98%, minimum transmittance (Tmin)>97%, and the laser power damage threshold of the laser-resistant film is>60w / mm 2 .

[0025] Furthermore, the first laser light source and the second laser light source are respectively located on both sides of the spectroscopic filter, and the spectroscopic filter forms an angle of approximately 45° with the optical axis of the first laser light source and the optical axis of the second laser light source.

[0026] Furthermore, the second diffuser is located between the second laser light source and the light-transmitting scatterer.

[0027] Furthermore, the light source system further includes a control structure for adjusting the power of the second laser light source.

[0028] Compared with the existing technology, the beneficial effects of the present invention are: the light emitted by the light source system of this technical solution is very uniform, which can effectively solve the long-standing problem of yellow aperture of the lighting light generated by the laser light source. The light source system also has high brightness and high illumination effects, and has great market application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] FIG1 is a simplified structural diagram of a light source system of the present invention.

[0030] FIG2 is a physical picture of the light source beam of Example 1.

[0031] FIG3 is a real picture of the light spot on the wall of the light source of Example 1.

[0032] FIG4 is a physical picture of the light source beam of Comparative Example 1.

[0033] FIG5 is a physical picture of the light spot on the wall of the light source of Comparative Example 1. DETAILED DESCRIPTION

[0034] The accompanying drawings are for illustrative purposes only and are not to be construed as limiting the present invention. To better illustrate the following embodiments, some components in the accompanying drawings may be omitted, enlarged, or reduced in size, and do not represent actual product dimensions. Those skilled in the art will appreciate that some well-known structures and their descriptions may be omitted from the accompanying drawings.

[0035] For simplicity, only some numerical ranges are explicitly disclosed herein. However, any lower limit can be combined with any upper limit to form an unspecified range; and any lower limit can be combined with other lower limits to form an unspecified range, and similarly, any upper limit can be combined with any other upper limit to form an unspecified range. In addition, although not explicitly stated, each point or individual value between the endpoints of a range is included in the range. Thus, each point or individual value can serve as its own lower limit or upper limit and be combined with any other point or individual value, or with other lower limits or upper limits, to form an unspecified range.

[0036] In the description of this article, it should be noted that, unless otherwise specified, “above” and “below” are inclusive of the number themselves, and “a variety” in “one or more” means more than two.

[0037] The above disclosure of the present application is not intended to describe every disclosed embodiment or every implementation in the present application. The following description more specifically illustrates exemplary embodiments. In many places throughout the application, guidance is provided through a series of examples, which can be used in various combinations. In each example, the enumeration is intended only as a representative group and should not be construed as exhaustive.

[0038] During their research, the inventors discovered that while laser lighting offers advantages such as high energy density, brightness, and long irradiation distance, the uniformity of the light spot is insufficient. In particular, for transmissive laser lighting solutions, the "yellow aperture" and "yellow edge" issues have long been technical challenges that the industry has struggled to overcome. To address the yellow aperture issue, the most common approach currently employed is to diffuse and even the light using optical elements with a light-homogenizing effect, such as a high-power diffuser or a compound-eye lens. However, the presence of these optical elements results in significant light loss, and in particular, the final illumination decreases significantly, negating the inherent high illumination advantage of laser lighting.

[0039] This application is proposed based on the above problems.

[0040] The present application provides a light source system, comprising:

[0041] A first laser light source, configured to emit a first laser;

[0042] A second laser light source, configured to emit a second laser;

[0043] a wavelength conversion device for converting at least part of the first laser light into a converted light;

[0044] Light-emitting lens, used for emitting light;

[0045] A spectroscopic filter is arranged obliquely in the emission direction of the first laser and the second laser, and is used to guide the first laser to the wavelength conversion device and guide the converted laser and the second laser to the light output lens;

[0046] A first lens assembly is provided between the spectroscopic filter and the wavelength conversion device;

[0047] A light-transmitting scatterer and a second lens assembly are further provided between the second laser light source and the spectroscopic filter; the light-transmitting scatterer includes a scattering layer with a thickness of 8 to 60 μm, the scattering layer includes an encapsulation body and scattering particles, and the mass ratio of the encapsulation body to the scattering particles is 1:1 to 10:1, the scattering particles are powders in which the mass of particles with a particle size of 10 to 500 nm accounts for more than 60%, and the thickness of the scattering layer is 8 to 60 μm;

[0048] A first diffuser and a second diffuser are respectively provided between the spectroscopic filter and the first laser light source and the second laser light source, and the diffusion degree of the second diffuser is 3 to 8 times that of the first diffuser;

[0049] The first lens assembly and the second lens assembly have the same optical performance.

[0050] In the present technical solution, the first laser light emitted by the first laser light source is guided to the wavelength conversion device after being acted upon by the spectroscopic filter. The wavelength conversion device converts at least part of the first laser light into a converted laser light, which is collected by the first lens assembly to obtain a wavelength-converted beam, which is then emitted to the light-emitting lens through the spectroscopic filter. The second laser light emitted by the second laser light source is converted into light with a flat-angle distribution after being acted upon by a specific light-transmitting scatterer, which is then collected by the second lens assembly and then irradiated in the direction of the light-emitting lens after being acted upon by the spectroscopic filter. Since the optical properties of the first lens assembly and the second lens assembly are the same, the beam obtained by the second laser light after being acted upon by the second lens assembly has the same phase point as the spot of the wavelength-converted beam. Furthermore, by making the diffusion degree of the second diffuser 3 to 8 times that of the first diffuser, and by controlling the thickness of the scattering layer of the light-transmitting scatterer, the ratio of the encapsulation body and the scattering particles, and the particle size of the scattering particles, the laser spot size and distribution of the second laser light after being acted upon by the diffuser and the light-transmitting scatterer can match those of the wavelength-converted beam. After being acted upon by the spectroscopic filter, the wavelength-converted beam and the second laser beam overlap and completely match. This technical solution sets lens components with the same optical performance between the spectroscopic filter and the second laser light source, and between the wavelength conversion device and the spectroscopic filter, and sets a specific light-transmitting scatterer and diffuser between the spectroscopic filter and the second laser light source, so that the laser beam emitted by the second laser light source can effectively supplement the wavelength-converted beam of the first laser light source after being converted by the wavelength conversion device. Finally, the light beam emitted by the light-emitting lens has good uniformity, is free of any yellow aperture phenomenon, and has high beam illumination.

[0051] Furthermore, the diffusion degree of the second diffuser is 3 to 9 degrees.

[0052] Furthermore, the light-transmitting scatterer is located between the second laser light source and the second lens assembly, and the light-transmitting scatterer also includes a scattering substrate for carrying the scattering layer, and the scattering substrate is located on a side close to the second laser light source.

[0053] Furthermore, the scattering substrate is made of glass, quartz or sapphire with a transmittance of more than 80% in the 440-465 nm wavelength band.

[0054] Furthermore, the scattering substrate is a single-sided or double-sided microstructured substrate, or is an atomized scattering substrate. The atomized substrate or the scattering substrate with a microstructure on the surface can further enhance the blue light scattering effect.

[0055] Furthermore, the scattering particles are one or more combinations of barium sulfate, titanium oxide, zirconium oxide, zinc oxide, lithopone, aluminum oxide, silicon oxide, hollow glass microspheres, hollow ceramic microspheres or hollow resin microspheres.

[0056] Furthermore, the package body is organic silica gel, inorganic silicon oxide or Si / B / Zn / Al / Na / K / O series glass powder.

[0057] Furthermore, the first and second laser light sources are both blue lasers, and the power of the first laser light source is greater than that of the second laser light source. The spectroscopic filter is a spectroscopic filter that reflects blue light and transmits yellow light. The wavelength conversion device converts at least part of the first laser light into yellow light. The first laser light source serves as the main laser. The main blue laser light is irradiated by the spectroscopic filter that reflects blue light and transmits yellow light, and then reflected by the wavelength conversion device. The wavelength conversion device converts part of the laser light into yellow light, while part of the laser light is scattered. Because the spectroscopic filter reflects blue light and transmits yellow light, the yellow light can pass through the spectroscopic filter and be emitted through the light output lens, while part of the blue light can also be reflected back by the spectroscopic filter. The second laser light source serves as the compensation laser. The scattered blue light obtained after being scattered by the light-transmitting scatterer is irradiated by the spectroscopic filter. The yellow light obtained after the main laser light passes through the wavelength conversion device and the scattered blue light are combined by the spectroscopic filter and ultimately emitted through the light output lens as white light.

[0058] The surface of the spectroscopic filter is coated with a laser-resistant film. The laser-resistant film is designed to meet the following requirements at an incident angle of 40-50° and a wavelength range of 430-465nm: Ravg>99.5%, Rmin>99.0%; at an incident angle of 40-50° and a wavelength range of 485-700nm: Tavg>98%, Tmin>97%, and the laser-resistant film has a laser power damage threshold of>60w / mm 2 .

[0059] Furthermore, the first laser light source and the second laser light source are respectively located on either side of the spectroscopic filter, and the spectroscopic filter forms an approximately 45° angle with the optical axis of the first laser light source and the optical axis of the second laser light source. This design facilitates the installation and placement of various components.

[0060] Furthermore, the optical axis of the first lens group is perpendicular to the optical axis of the second lens group, and the optical axes of the two intersect at the dichroic filter.

[0061] Furthermore, the second diffuser is located between the second laser light source and the light-transmitting scatterer.

[0062] Furthermore, a first converging lens for converging the first laser light is provided between the first diffuser and the spectroscopic filter, and a second converging lens for converging the second laser light is provided between the second diffuser and the light-transmitting scatterer.

[0063] Furthermore, the light source system includes a control structure for adjusting the power of the second laser light source. By varying the power of the second laser light source through the control structure, the output optical power of the second laser light source can be adjusted, thereby varying the proportion of the second laser light in the mixed light beam. This allows for personalized adjustment of the color temperature of the mixed light beam to meet diverse application scenarios requiring different color temperatures. This means that while maintaining the high illumination characteristic of laser light sources, the light source system also achieves uniform light beams and a lighting control effect with adjustable color temperatures within a single light source system.

[0064] Furthermore, the wavelength conversion device can be a static light-emitting device structure or a dynamic light-emitting device structure. When the wavelength conversion device is configured as a static light-emitting device structure, a design is adopted in which a wavelength conversion layer is bonded to a heat sink substrate. The wavelength conversion layer is preferably an inorganic light-emitting layer, a glass light-emitting layer, or a ceramic light-emitting layer. The wavelength conversion layer can be bonded to the heat sink substrate by curing or high-temperature sintering through its own properties, or it can be bonded to the surface of the heat sink substrate through curing or high-temperature sintering methods such as organic silicone, inorganic glue, or solder. The thickness of the heat sink substrate is preferably 0.4 to 5 mm, and the thermal conductivity is preferably higher than 80 W / m*K. High thermal conductivity ceramics such as diamond, aluminum nitride, silicon carbide, silicon nitride, thermally conductive graphite plate, etc. can also be used. A metal layer substrate can also be coated on the surface of the thermally conductive ceramic, or a metal substrate such as aluminum, silver, copper, oxygen-free copper, tungsten copper, etc. with a thermal conductivity higher than 180 W / m*K can be selected. The surface of the heat sink substrate can be further polished, and the surface roughness is preferably Ra<0.03um. The polished surface is preferably plated with metal silver, aluminum silver or a dielectric full reflective film to reflect stimulated fluorescence and residual blue light. When the wavelength conversion device is made into a dynamic light-emitting device structure, a common method is to make it into a color wheel mode and bond the wavelength conversion layer to a rotatable heat dissipation substrate. The wavelength conversion layer can be a single-layer or multi-layer design. When it is a single-layer design, the layer is mainly a fluorescent light-emitting layer. At this time, the bonding surface of the heat dissipation substrate is polished, and the polished surface is plated with silver, silver-aluminum alloy or a dielectric full reflective film as a reflective layer to reflect stimulated fluorescence and residual blue light; when it is a multi-layer design, the wavelength conversion layer includes at least a fluorescent light-emitting layer and a fluorescent reflective layer. At this time, the bonding surface of the heat dissipation substrate can be polished, and the polished surface is plated with silver or silver-aluminum alloy, or it can be polished and not plated.

[0065] Furthermore, the scatterer can be made into a static device, or the scattering substrate can be assembled on the rotating shaft of a rotating motor to form a rotating disk or ring device.

[0066] The following examples describe the present disclosure in more detail. These examples are intended to be illustrative only, as various modifications and variations within the scope of the present disclosure will be apparent to those skilled in the art. Unless otherwise stated, percentages and ratios reported in the following examples are all based on weight.

[0067] Example 1

[0068] As shown in FIG1 , this embodiment discloses a light source system, including:

[0069] A first laser light source 1, configured to emit a first laser;

[0070] A second laser light source 2, for emitting a second laser;

[0071] A wavelength conversion device 3, configured to convert at least part of the first laser light into converted light;

[0072] A light-emitting lens 4, used for emitting light;

[0073] The spectroscopic filter 5 is arranged obliquely in the emission direction of the first laser and the second laser, and is used to guide the first laser to the wavelength conversion device 3 and guide the converted laser and the second laser to the light output lens 4;

[0074] A first lens assembly 6 is provided between the spectroscopic filter 5 and the wavelength conversion device 3;

[0075] A light-transmitting scatterer 7 and a second lens assembly 8 are further provided between the second laser light source 2 and the spectroscopic filter 5, and the light-transmitting scatterer 7 is located on the side close to the second laser light source 2; the light-transmitting scatterer 7 includes a scattering layer and a scattering substrate for supporting the scattering layer, and the scattering substrate is located on the side close to the second laser light source 2; the scattering layer includes an encapsulation body and scattering particles, and the mass ratio of the encapsulation body to the scattering particles is 5:2; the scattering particles are powders in which the mass of particles with a particle size of 10 to 100 nm accounts for more than 60%; and the thickness of the scattering layer is 20 to 40 μm;

[0076] A first diffuser 9 and a second diffuser 10 are respectively provided between the spectroscopic filter 5 and the first laser light source 1 and the second laser light source 2. The first diffuser has a diffusion degree of 1.2°, and the second diffuser has a diffusion degree of 7°. More specifically, the second diffuser 10 is located between the second laser light source 2 and the light-transmitting diffuser 7.

[0077] The optical performance of the first lens assembly 6 and the second lens assembly 8 are the same. More specifically, the first lens group and the second lens group each include three lenses, which are the first lens, the second lens and the third lens in sequence, and the third lens is close to the dichroic filter.

[0078] More specifically, in this embodiment, the first laser light source 1 and the second laser light source 2 are both blue lasers, the spectroscopic filter 5 is a spectroscopic filter that reflects blue light and transmits yellow light, and has a laser-resistant film on its surface. The film system is designed to meet the following requirements in the wavelength range of 45°430~465nm: Ravg>99.5%, Rmin>99.0%; in the wavelength range of 45°485~700nm: Tavg>98%, Tmin>97%, and the laser-resistant film system has a laser power damage threshold of>60w / mm 2 The first laser light source 1 and the second laser light source 2 are respectively located on either side of the dichroic filter 5, and the dichroic filter 5 forms a 45° angle with the optical axis of the first laser light source 1 and the optical axis of the second laser light source 1. The optical axis of the first lens group 6 and the optical axis of the second lens group 8 are perpendicular, and the optical axes of the two intersect at the dichroic filter 5.

[0079] Furthermore, a first converging lens 11 for converging the first laser light is provided between the first diffuser 9 and the spectroscopic filter 5 , and a second converging lens 12 for converging the second laser light is provided between the second diffuser 10 and the light-transmitting scatterer 7 .

[0080] Furthermore, in this embodiment, the scattering particles are aluminum oxide, and the encapsulation is organic silica gel. In other embodiments, the scattering particles may also be zinc oxide, magnesium oxide, yttrium oxide, titanium oxide, lithopone, polymethyl methacrylate, polyethylene microspheres, etc., and the encapsulation may also be inorganic silicon oxide or glass powder.

[0081] Furthermore, the wavelength conversion device 3 in this embodiment includes a reflective heat dissipation substrate and a yellow phosphor layer disposed on the reflective heat dissipation substrate. The reflective heat dissipation substrate can be a ceramic substrate or a metal substrate, and can be static or rotating. The combined focal length of the first lens group is located on the yellow phosphor layer, or the focal plane of the yellow phosphor layer and the first lens group are slightly offset, for example, by 0.01 mm to 0.3 mm.

[0082] The working process of the light source system in this embodiment is as follows:

[0083] The first laser light source 1 emits a first laser beam (blue laser, serving as the main illumination laser beam) which is converged by a first converging lens 11 onto a spectroscopic filter 5. Since the spectroscopic filter 5 reflects blue light and transmits yellow light, the first laser beam is reflected by the spectroscopic filter 5 and then irradiated onto the wavelength conversion device 3. The wavelength conversion device 3 converts at least part of the first laser beam into converted yellow light. Since the spectroscopic filter 5 reflects blue light and transmits yellow light, only the yellow light can pass through the spectroscopic filter 5, while the remaining blue light is reflected by the spectroscopic filter and then returned to the wavelength conversion device 3. The converted yellow light is collected by the first lens assembly 6 and then emitted through the spectroscopic filter 5 to the light output lens 4. The second laser emitted by the second laser light source 2 can obtain a blue laser beam with a certain deformation effect after being acted upon by the second diffuser 10, and is converged onto the light-transmitting scatterer 7 through the second converging lens 12. The blue laser beam becomes light similar to a flat-angle distribution after being acted upon by the specific light-transmitting scatterer 7. The reason is that the light-transmitting scatterer 7 contains a certain proportion of scattering particles and encapsulation bodies. Experimental studies have found that this light-transmitting scatterer can reduce the central blue light power density of the blue laser and expand the blue light emission angle, so that the blue laser energy changes from the original Gaussian distribution to a weak Gaussian or even flat-angle distribution of blue light. This technical solution can obtain a beam with the target effect by controlling the particle size of the scattering particles inside the scattering layer, the ratio of the encapsulation body and the scattering particles, and the thickness of the scattering layer. The light is then collected by the second lens assembly 8, and then reflected by the spectroscopic filter 5 and irradiated in the direction of the light-emitting lens 4. This technical solution controls the diffusion degree of the second diffuser to be 3 to 8 times that of the first diffuser, matches it with a specific light-transmitting scatterer 7, and uses a second lens assembly 8 with the same optical properties as the first lens assembly 6. This ensures that the second laser light emitted by the second laser is completely matched with the converted light of the first laser 1 when it finally strikes the spectroscopic filter 5, including the beam energy distribution characteristics and spot size. The yellow light of the converted light of the first laser 1 and the blue light of the second laser 2 are mixed to form white light, in which the yellow light serves as the main light source and has a high illumination effect, while the blue light serves as compensation light, thereby obtaining a uniform beam of white light.

[0084] The laser light source of this embodiment can be widely used in laser lighting fields such as car lights, stage lights, searchlights, beam lights, and moving head lights to solve the color unevenness problem of the light beam with "yellow edges and blue center" and obtain a uniform high-intensity white light.

[0085] Example 2

[0086] A light source system, comprising:

[0087] A first laser light source 1, configured to emit a first laser;

[0088] A second laser light source 2, for emitting a second laser;

[0089] A wavelength conversion device 3, configured to convert at least part of the first laser light into converted light;

[0090] A light-emitting lens 4, used for emitting light;

[0091] The spectroscopic filter 5 is arranged obliquely in the emission direction of the first laser and the second laser, and is used to guide the first laser to the wavelength conversion device 3 and guide the converted laser and the second laser to the light output lens 4;

[0092] A first lens assembly 6 is provided between the spectroscopic filter 5 and the wavelength conversion device 3;

[0093] A light-transmitting scatterer 7 and a second lens assembly 8 are further provided between the second laser light source 2 and the spectroscopic filter 5, and the light-transmitting scatterer 7 is located on the side close to the second laser light source 2. The light-transmitting scatterer 7 includes a scattering layer and a scattering substrate for supporting the scattering layer, and the scattering substrate is located on the side close to the second laser light source 2. The scattering layer includes an encapsulation body and scattering particles, and the mass ratio of the encapsulation body to the scattering particles is 5:2. The scattering particles are powders in which the mass of particles with a particle size of 100 to 200 nm accounts for more than 60%. The thickness of the scattering layer is 8 to 20 μm.

[0094] A first diffuser 9 and a second diffuser 10 are respectively provided between the spectroscopic filter 5 and the first laser light source 1 and the second laser light source 2. The diffusion degree of the first diffuser is 1.1°, and the diffusion degree of the second diffuser 10 is 8.8°.

[0095] The other structures of the light source system described in this embodiment are the same as those in Embodiment 1 and will not be described again here.

[0096] Example 3

[0097] A light source system, comprising:

[0098] A first laser light source 1, configured to emit a first laser;

[0099] A second laser light source 2, for emitting a second laser;

[0100] A wavelength conversion device 3, configured to convert at least part of the first laser light into converted light;

[0101] A light-emitting lens 4, used for emitting light;

[0102] The spectroscopic filter 5 is arranged obliquely in the emission direction of the first laser and the second laser, and is used to guide the first laser to the wavelength conversion device 3 and guide the converted laser and the second laser to the light output lens 4;

[0103] A first lens assembly 6 is provided between the spectroscopic filter 5 and the wavelength conversion device 3;

[0104] A light-transmitting scatterer 7 and a second lens assembly 8 are further provided between the second laser light source 2 and the spectroscopic filter 5, and the light-transmitting scatterer 7 is located on the side close to the second laser light source 2. The light-transmitting scatterer 7 includes a scattering layer and a scattering substrate for supporting the scattering layer, and the scattering substrate is located on the side close to the second laser light source 2. The scattering layer includes an encapsulation body and scattering particles, and the mass ratio of the encapsulation body to the scattering particles is 5:2. The scattering particles are powders in which the mass of particles with a particle size of 200 to 300 nm accounts for more than 60%. The thickness of the scattering layer is 40 to 60 μm.

[0105] A first diffuser 9 and a second diffuser 10 are provided between the spectroscopic filter 5 and the first laser light source 1 and the second laser light source 2, respectively. The diffusion degree of the first diffuser is 1.3°, and the diffusion degree of the second diffuser is 4°.

[0106] The other structures of the light source system described in this embodiment are the same as those in Embodiment 1 and will not be described again here.

[0107] Example 4

[0108] A light source system, comprising:

[0109] A first laser light source 1, configured to emit a first laser;

[0110] A second laser light source 2, for emitting a second laser;

[0111] A wavelength conversion device 3, configured to convert at least part of the first laser light into converted light;

[0112] A light-emitting lens 4, used for emitting light;

[0113] The spectroscopic filter 5 is arranged obliquely in the emission direction of the first laser and the second laser, and is used to guide the first laser to the wavelength conversion device 3 and guide the converted laser and the second laser to the light output lens 4;

[0114] A first lens assembly 6 is provided between the spectroscopic filter 5 and the wavelength conversion device 3;

[0115] A light-transmitting scatterer 7 and a second lens assembly 8 are further provided between the second laser light source 2 and the spectroscopic filter 5, and the light-transmitting scatterer 7 is located on the side close to the second laser light source 2. The light-transmitting scatterer 7 includes a scattering layer and a scattering substrate for supporting the scattering layer, and the scattering substrate is located on the side close to the second laser light source 2. The scattering layer includes an encapsulation body and scattering particles, and the mass ratio of the encapsulation body to the scattering particles is 10:1. The scattering particles are powders in which the mass of particles with a particle size of 300 to 400 nm accounts for more than 60%. The thickness of the scattering layer is 20 to 40 μm.

[0116] A first diffuser 9 and a second diffuser 10 are provided between the spectroscopic filter 5 and the first laser light source 1 and the second laser light source 2, respectively. The diffusion degree of the first diffuser is 1.2°, and the diffusion degree of the second diffuser is 7°.

[0117] The other structures of the light source system described in this embodiment are the same as those in Embodiment 1 and will not be described again here.

[0118] Example 5

[0119] A light source system, comprising:

[0120] A first laser light source 1, configured to emit a first laser;

[0121] A second laser light source 2, for emitting a second laser;

[0122] A wavelength conversion device 3, configured to convert at least part of the first laser light into converted light;

[0123] A light-emitting lens 4, used for emitting light;

[0124] The spectroscopic filter 5 is arranged obliquely in the emission direction of the first laser and the second laser, and is used to guide the first laser to the wavelength conversion device 3 and guide the converted laser and the second laser to the light output lens 4;

[0125] A first lens assembly 6 is provided between the spectroscopic filter 5 and the wavelength conversion device 3;

[0126] A light-transmitting scatterer 7 and a second lens assembly 8 are further provided between the second laser light source 2 and the spectroscopic filter 5, and the light-transmitting scatterer 7 is located on the side close to the second laser light source 2. The light-transmitting scatterer 7 includes a scattering layer and a scattering substrate for supporting the scattering layer, and the scattering substrate is located on the side close to the second laser light source 2. The scattering layer includes an encapsulation body and scattering particles, and the mass ratio of the encapsulation body to the scattering particles is 1:1. The scattering particles are powders in which the mass of particles with a particle size of 400 to 500 nm accounts for more than 60%. The thickness of the scattering layer is 20 to 40 μm.

[0127] A first diffuser 9 and a second diffuser 10 are provided between the spectroscopic filter 5 and the first laser light source 1 and the second laser light source 2, respectively. The diffusion degree of the first diffuser is 1.2°, and the diffusion degree of the second diffuser is 7°.

[0128] The other structures of the light source system described in this embodiment are the same as those in Embodiment 1 and will not be described again here.

[0129] Comparative Example 1

[0130] A light source system is substantially the same as that of Example 1, except that the mass ratio of the package to the scattering particles in this comparative example 1 is 15:1.

[0131] Comparative Example 2

[0132] A light source system is substantially the same as that of Example 1, except that the thickness of the scattering layer in this comparative example 2 is 70-90 μm.

[0133] Comparative Example 3

[0134] A light source system is substantially the same as Example 1, except that the scattering particles in Comparative Example 3 are powders in which particles with a particle size of 1 to 3 μm account for more than 60% by mass.

[0135] Comparative Example 4

[0136] A light source system is basically the same as Example 1, except that the degree of the second diffuser in this comparative example 4 is 10°.

[0137] Comparative Example 5

[0138] A light source system is basically the same as Example 1, except that the second lens assembly of this comparative example 5 lacks the third lens compared with Example 1.

[0139] The laser light sources of Examples 1 to 5 and Comparative Examples 1 to 5 were subjected to the following performance tests. The first laser light source used a 20W blue laser as the main laser, the second laser light source used a 5W blue laser as the compensation laser, and the total power of the light source system was 25W. The central illuminance and color temperature of the light spot on the wall of the light source in each of the above Examples and Comparative Examples were tested, as well as the loss ratio of the compensation laser after scattering by a light-transmitting scatterer. The light spot effect on the wall and the color uniformity of the beam were observed. The testing methods for each item are as follows:

[0140] (1) Compensation laser power loss ratio test: Use a laser power meter to test the blue light power W of the second laser after passing through the light-emitting lens in Examples 1 to 5 and Comparative Examples 1 to 5 of the present case; for comparison, simultaneously test the blue light power of the second laser light source without a light-transmitting scatterer and a second diffuser, calibrated as W0 (theoretically, the output power of the bare laser is 5W, and in actual application, there will be some loss due to the heat dissipation of the laser heat sink copper plate and the influence of the optical lens); then (W0-W) / W0 is the blue light power loss ratio.

[0141] (2) Test of the center illuminance and color temperature of the light spot: Test the center illuminance and color temperature of the light spot on the wall of the light source at a distance of 10m and with a 130mm collimating lens.

[0142] (3) Color of the light spot on the wall: Test at a distance of 10m and with a 130mm collimating lens, project the light spot onto a white wall and observe the color uniformity of the light spot.

[0143] (4) Beam color: Use a 130mm collimating lens to collimate the light and observe the color uniformity of the mixed beam within a distance of 10m.

[0144] The test results are shown in Table 1. Figure 2 is a real picture of the light beam of the light source of Example 1. Figure 3 is a real picture of the light spot on the wall of the light source of Example 1. Figure 4 is a real picture of the light beam of the light source of Comparative Example 1, and Figure 5 is a real picture of the light spot on the wall of the light source of Comparative Example 1.

[0145] Table 1

[0146] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the technical solutions of the present invention, and are not intended to limit the specific implementation methods of the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the claims of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A light source system, characterized in that: include: A first laser light source, used for emitting a first laser; A second laser light source, used for emitting a second laser; A wavelength conversion device, used to convert at least part of the first laser light into the converted light; A light-emitting lens, used for emitting light; A spectroscopic filter is arranged obliquely in the emission direction of the first laser and the second laser, and is used to guide the first laser to the wavelength conversion device, and guide the stimulated laser and the second laser to the light output lens; A first lens assembly is provided between the spectroscopic filter and the wavelength conversion device; a light-transmitting scatterer and a second lens assembly are provided between the second laser light source and the spectroscopic filter; the light-transmitting scatterer comprises a scattering layer with a thickness of 8 to 60 μm, the scattering layer comprises an encapsulation body and scattering particles, and the mass ratio of the encapsulation body to the scattering particles is 1:1 to 10:1, and the scattering particles are powders in which the mass of particles with a particle size of 10 to 500 nm accounts for more than 60%; A first diffuser and a second diffuser are respectively provided between the spectroscopic filter and the first laser light source and the second laser light source, and the diffusion degree of the second diffuser is 3 to 8 times that of the first diffuser; The first lens assembly and the second lens assembly have the same optical performance.

2. The light source system according to claim 1, characterized in that: The diffusion degree of the second diffusion sheet is 3 to 9°.

3. The light source system according to claim 1, characterized in that: The light-transmitting scatterer is located between the second laser light source and the second lens assembly. The light-transmitting scatterer also includes a scattering substrate for carrying the scattering layer, and the scattering substrate is located on a side close to the second laser light source.

4. The light source system according to claim 3, characterized in that: The scattering substrate is a glass, quartz or sapphire sheet with a transmittance of more than 80% in the 440-465nm band.

5. The light source system according to claim 3, characterized in that: The scattering substrate is a single-sided or double-sided microstructure, or is an atomized scattering substrate.

6. The light source system according to claim 1, characterized in that: The scattering particles are one or more combinations of barium sulfate, titanium oxide, zirconium oxide, zinc oxide, lithopone, aluminum oxide, silicon oxide, hollow glass microspheres, hollow ceramic microspheres or hollow resin microspheres, and / or the encapsulation body is organic silica gel, inorganic silicon oxide or Si / B / Zn / Al / Na / K / O glass powder.

7. The light source system according to claim 1, characterized in that: The first laser light source and the second laser light source are both blue lasers and the power of the first laser light source is greater than that of the second laser light source. The spectroscopic filter is a spectroscopic filter that reflects blue light and transmits yellow light. The wavelength conversion device converts at least part of the first laser into yellow light.

8. The light source system according to claim 1, characterized in that: The first laser light source and the second laser light source are respectively located on two sides of the spectral filter, and the spectral filter forms an angle of approximately 45° with the optical axis of the first laser light source and the optical axis of the second laser light source.

9. The light source system according to any one of claims 1 to 8, characterized in that: The second diffusion sheet is located between the second laser light source and the light-transmitting scatterer.

10. The light source system according to any one of claims 1 to 8, characterized in that: Also included is a control structure for adjusting the power of the second laser light source.

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