Light source system

Abstract

The invention discloses a light source system which comprises a first laser light source, a second laser light source, a wavelength conversion device, a light emitting lens and a light splitting filter, a first lens assembly is arranged between the light splitting filter and the wavelength conversion device, and a light-transmitting scatterer and a second lens assembly are further arranged between the second laser light source and the light splitting filter. The light-transmitting scatterer comprises a scattering layer, the scattering layer comprises a packaging body and scattering particles, a first diffusion sheet and a second diffusion sheet are arranged between the light-splitting optical filter and the first laser light source and between the light-splitting optical filter and the second laser light source respectively, the diffusion degree of the second diffusion sheet is 3-8 times that of the first diffusion sheet, and the optical performance of the first lens assembly is the same as that of the second lens assembly. According to the technical scheme, the uniformity of light emitted by the light source system is very good, the problem that illumination light generated based on the laser light source has a yellow aperture for a long time can be effectively solved, and meanwhile the light source system has the effects of high brightness and high illumination and has great market application value.

Description

Technical Field

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

[0002] At present, the light sources used in display and lighting devices on the market are mainly LEDs. The excitation light of LED light sources presents a flat angle distribution: within the range of the spot size, the excitation light energy is evenly distributed, and the fluorescent light beam and the wall spot excited by this are very uniform. However, LED light sources have problems such as insufficient illumination and insufficient irradiation distance. Laser (LD) is a new light source that has emerged in recent years. It has the advantages of high energy density and long irradiation distance. In display and lighting devices using LD laser light sources, the laser energy emitted by the laser presents a Gaussian distribution: the laser energy is high in the center of the spot, and the laser energy is reduced in the area away from the center of the spot. Therefore, the fluorescent light beam generated by the wavelength conversion material using Gaussian-distributed LD laser as the excitation source will cause the following problems: the central position of the light irradiated by the laser has a high proportion of blue light, and the proportion of blue light away from the center is small, resulting in the wall spot appearing white / blue in the middle and yellowish around, that is, the "yellow aperture" phenomenon, which greatly affects the uniformity of the 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] In order to solve the problem of "blue center and yellow edge" of the light beam in the laser lighting source, as well as the "yellow aperture" of the light spot on the wall, the existing technical solutions include the solution of using a reflective bowl: by irradiating the fluorescence on the reflective bowl, the reflective bowl evens the light, and then emits the light beam. Although this type of solution can greatly improve the problem of "blue center and yellow edge" of the light beam, after the fluorescent light beam is evenly lighted, the illumination at the center of the light spot is seriously reduced, the irradiation distance of the light source is shortened, and the advantage of the laser light source as a light source is lost. In some other technical cases, by using light rods, compound eyes and other light evening devices to break up the Gaussian laser into flat-angle light, the excitation light is evenly lighted, and the uniform distribution of the fluorescent light beam is achieved, but it also causes the severe weakening of the illumination at the center of the light spot, and the irradiation distance of the laser light source is seriously shortened. In some other technical cases, there are also design solutions using dichroic mirrors, but they still cannot achieve the ideal uniform white light effect. Summary of the invention

[0004] The present invention aims to overcome at least one defect of the above-mentioned prior art and provide a light source system, which has the effects of high brightness, high illumination and uniform light spot.

[0005] The technical solution adopted by the present invention is as follows:

[0006] A light source system, comprising:

[0007] A first laser light source, used for emitting a first laser;

[0008] A second laser light source, used for emitting a second laser;

[0009] A wavelength conversion device, used to convert at least part of the first laser light into the converted light;

[0010] A light-emitting lens, used for emitting light;

[0011] 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;

[0012] A first lens assembly is provided between the spectroscopic filter and the wavelength conversion device;

[0013] A light-transmitting scatterer and a second lens assembly are also 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%;

[0014] 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;

[0015] The first lens assembly and the second lens assembly have the same optical performance.

[0016] Furthermore, the diffusion degree of the second diffuser is 3 to 9 degrees.

[0017] 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.

[0018] Furthermore, the scattering substrate is glass, quartz or sapphire with a transmittance of more than 80% in the 440-465 nm band.

[0019] Furthermore, the scattering substrate is a single-sided or double-sided microstructure, or is a scattering substrate that has been atomized.

[0020] 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.

[0021] Furthermore, the packaging body is organic silica gel, inorganic silicon oxide or Si / B / Zn / Al / Na / K / O series glass powder.

[0022] 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, and the wavelength conversion device converts at least part of the first laser into yellow light.

[0023] 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 to 50° and a wavelength range of 430 to 465 nm: average reflectivity (Ravg)>99.5%, minimum reflectivity (Rmin)>99.0%; at an incident angle of 40 to 50° and a wavelength range of 485 to 700 nm: average transmittance (Tavg)>98%, minimum transmittance (Tmin)>97%, and the laser power damage threshold of the laser-resistant film system is>60w / mm 2 .

[0024] Furthermore, the first laser light source and the second laser light source are respectively located on both 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.

[0025] Furthermore, the second diffuser is located between the second laser light source and the light-transmitting scatterer.

[0026] Furthermore, the light source system also includes a control structure for adjusting the power of the second laser light source.

[0027] Compared with the prior art, the beneficial effects of the present invention are as follows: the light emitted by the light source system of the present technical solution is very uniform, which can effectively solve the long-standing problem of the yellow aperture of the illumination 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

[0028] Figure 1 It is a simplified structural diagram of the light source system of the present invention.

[0029] Figure 2 This is a real picture of the light source beam of Example 1.

[0030] Figure 3 This is a real picture of the light spot on the wall of the light source of Example 1.

[0031] Figure 4 This is a physical picture of the light source beam of comparative example 1.

[0032] Figure 5This is a real picture of the light spot on the wall of the light source of comparative example 1. DETAILED DESCRIPTION

[0033] The drawings of the present invention are only for illustrative purposes and should not be construed as limiting the present invention. In order to better illustrate the following embodiments, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; it is understandable to those skilled in the art that some well-known structures and their descriptions in the drawings may be omitted.

[0034] For simplicity, only some numerical ranges are explicitly disclosed herein. However, any lower limit can be combined with any upper limit to form an unambiguous range; and any lower limit can be combined with other lower limits to form an unambiguous range, and any upper limit can be combined with any other upper limit to form an unambiguous range. In addition, although not explicitly stated, each point or single value between the range endpoints is included in the range. Thus, each point or single value can be combined with any other point or single value as its own lower limit or upper limit or with other lower limits or upper limits to form an unambiguous range.

[0035] In the description of this article, it should be noted that, unless otherwise specified, “above” and “below” are inclusive of the number itself, and the “multiple” in “one or more” means more than two.

[0036] The above application content of the present application is not intended to describe each disclosed embodiment or each implementation in the present application. The following description more specifically illustrates exemplary embodiments. In many places throughout the application, guidance is provided by a series of examples, which can be used in various combinations. In each example, enumeration is only used as a representative group and should not be interpreted as exhaustive.

[0037] During the research, the inventors found that although laser lighting has advantages such as high energy density, high 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" problems have always been technical difficulties that the industry has been unable to effectively overcome. In order to solve the yellow aperture problem, the most commonly used method is to use optical elements with a uniform light effect to diffuse and uniform the light, such as using a large-degree diffuser or a compound eye lens. However, the presence of these optical elements will cause a lot of light loss, especially the final illumination will drop significantly, losing the high illumination advantage that laser lighting should have.

[0038] This application is proposed based on the above problems.

[0039] The present application provides a light source system, comprising:

[0040] A first laser light source, used for emitting a first laser;

[0041] A second laser light source, used for emitting a second laser;

[0042] A wavelength conversion device, used to convert at least part of the first laser light into the converted light;

[0043] A light-emitting lens, used for emitting light;

[0044] 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;

[0045] A first lens assembly is provided between the spectroscopic filter and the wavelength conversion device;

[0046] A light-transmitting scatterer and a second lens assembly are also 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;

[0047] 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;

[0048] The first lens assembly and the second lens assembly have the same optical performance.

[0049] In the technical solution, the first laser emitted by the first laser light source is guided to the wavelength conversion device after being acted on by the spectroscopic filter. The wavelength conversion device converts at least part of the first laser into the stimulated laser. The stimulated laser is collected by the first lens assembly to obtain a wavelength-converted light beam, which is then emitted to the light-emitting lens through the spectroscopic filter. The second laser emitted by the second laser light source becomes light similar to a flat-angle distribution after being acted on by a specific light-transmitting scatterer, and then is collected by the second lens assembly, and then is irradiated to the direction of the light-emitting lens after being acted on by the spectroscopic filter. Since the optical properties of the first lens assembly and the second lens assembly are the same, the light beam obtained by the second laser after being acted on by the second lens assembly has the same light spot phase point as the wavelength-converted light 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 after being acted on by the diffuser and the light-transmitting scatterer can match the wavelength-converted light beam, and the wavelength-converted light beam and the second laser beam overlap and completely match after being acted on by the spectroscopic filter. The technical solution sets lens components with the same optical properties between the spectroscopic filter and the second laser light source, between the wavelength conversion device and the spectroscopic filter, and sets specific light-transmitting scatterers and diffusers between the spectroscopic filter and the second laser light source, so that the laser light beam emitted by the second laser light source can effectively supplement the wavelength-converted light beam of the first laser light source 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 light beam illumination.

[0050] Furthermore, the diffusion degree of the second diffuser is 3 to 9 degrees.

[0051] 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.

[0052] Furthermore, the scattering substrate is glass, quartz or sapphire with a transmittance of more than 80% in the 440-465 nm band.

[0053] Furthermore, the scattering substrate is a single-sided or double-sided microstructure, or is an atomized scattering substrate. The atomized substrate or the scattering substrate with microstructure on the surface can further increase the blue light scattering effect.

[0054] 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.

[0055] Furthermore, the packaging body is organic silica gel, inorganic silicon oxide or Si / B / Zn / Al / Na / K / O series glass powder.

[0056] 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. The first laser light source is used as the main laser. The main blue laser is irradiated by the spectroscopic filter that reflects blue light and transmits yellow light and is reflected to the wavelength conversion device. The wavelength conversion device converts part of the laser into yellow light as the stimulated laser. Part of the laser is scattered. Since the spectroscopic filter reflects blue light and transmits yellow light, the stimulated yellow light can pass through the spectroscopic filter and emit light through the light-emitting lens, and part of the blue light can also be reflected back by the spectroscopic filter. The second laser light source is used as the compensation laser. The scattered blue light obtained after being scattered by the light-transmitting scatterer is irradiated to the spectroscopic filter. The yellow light obtained after the main laser is acted on by the wavelength conversion device and the scattered blue light are combined in the spectroscopic filter, and finally emitted through the light-emitting lens to obtain white light.

[0057] 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 conditions: Ravg>99.5%, Rmin>99.0% at an incident angle of 40-50° and a wavelength range of 430-465nm; and meets the following conditions: Tavg>98%, Tmin>97% at an incident angle of 40-50° and a wavelength range of 485-700nm, and the laser power damage threshold of the laser-resistant film is>60w / mm 2 .

[0058] 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 and the optical axis of the first laser light source and the optical axis of the second laser light source form an angle of approximately 45°. Such a design facilitates the installation and placement of various components.

[0059] 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 lens groups intersect at the dichroic filter.

[0060] Furthermore, the second diffuser is located between the second laser light source and the light-transmitting scatterer.

[0061] Furthermore, a first converging lens for converging the first laser is provided between the first diffuser and the spectroscopic filter, and a second converging lens for converging the second laser is provided between the second diffuser and the light-transmitting scatterer.

[0062] Furthermore, the light source system also includes a control structure for adjusting the power of the second laser light source. By changing 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 changing the proportion of the second laser in the mixed light beam, realizing personalized adjustment of the color temperature of the mixed light beam, and meeting application scenarios with different color temperature requirements. That is, the light source system can achieve uniform light beams and realize a lighting control effect of adjustable multiple color temperatures in a light source system while ensuring the high illumination of the laser light source.

[0063] 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 made into a static light-emitting device structure, a design of bonding a wavelength conversion layer to a heat sink substrate is adopted. 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 after curing or high-temperature sintering by its own properties, or it can be bonded to the surface of the heat sink substrate by 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 80w / m*k. High thermal conductivity ceramics such as diamond, aluminum nitride, silicon carbide, silicon nitride, thermal conductive graphite plate, etc. can also be coated with a metal layer substrate on the surface of the thermal conductive ceramic, or a metal substrate such as metal aluminum, silver, copper, oxygen-free copper, tungsten copper, etc. with a thermal conductivity higher than 180w / 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 reflection 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 reflection film as a reflection 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 reflection 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 coated without coating.

[0064] 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.

[0065] The following examples more specifically describe the contents disclosed in the present application, and these examples are only used for illustrative description, because it is obvious to those skilled in the art to make various modifications and changes within the scope of the present application disclosure. Unless otherwise stated, the percentages and ratios reported in the following examples are all based on weight. Example 1

[0066] like Figure 1 As shown, this embodiment discloses a light source system, including:

[0067] A first laser light source 1, used for emitting a first laser;

[0068] A second laser light source 2, used for emitting a second laser;

[0069] A wavelength conversion device 3, used for converting at least part of the first laser into converted light;

[0070] A light-emitting lens 4, used for emitting light;

[0071] 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;

[0072] A first lens assembly 6 is provided between the spectroscopic filter 5 and the wavelength conversion device 3;

[0073] 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 a side close to the second laser light source 2; the light-transmitting scatterer 7 includes a scattering layer and a scattering substrate for carrying the scattering layer, and the scattering substrate is located on a side close to the second laser light source 2, the scattering layer includes a package and scattering particles, and the mass ratio of the package 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;

[0074] 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 1.2°, and the diffusion degree of the second diffuser is 7°. More specifically, the second diffuser 10 is located between the second laser light source 2 and the light-transmitting scatterer 7.

[0075] The optical performance of the first lens assembly 6 and the second lens assembly 8 is 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.

[0076] 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 both sides of the dichroic filter 5, and the dichroic filter 5 forms an angle of 45° 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.

[0077] 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 .

[0078] Furthermore, the scattering particles in this embodiment are aluminum oxide, and the encapsulation body is organic silica gel. In other embodiments, the scattering particles can also be zinc oxide, magnesium oxide, yttrium oxide, titanium oxide, lithopone, polymethyl methacrylate, polyethylene microspheres, etc., and the encapsulation body can also be inorganic silicon oxide and glass powder.

[0079] 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, etc., which can be static or rotating. The combined focal length of the first lens group is located on the yellow phosphor layer or the yellow phosphor layer and the focal plane of the first lens group are slightly deviated, such as 0.01 mm to 0.3 mm.

[0080] The working process of the light source system described in this embodiment is as follows:

[0081] The first laser light source 1 emits a first laser (blue laser, serving as the main illumination laser) and converges to the spectroscopic filter 5 through the first converging lens 11. Since the spectroscopic filter 5 reflects blue light and transmits yellow light, the first laser is reflected by the spectroscopic filter 5 and then irradiated to the wavelength conversion device 3. The wavelength conversion device 3 converts at least part of the first laser into converted yellow light. Since the spectroscopic filter 5 reflects blue light and transmits yellow light, only yellow light can pass through the spectroscopic filter 5, and the remaining blue light will be reflected by the spectroscopic filter to the wavelength conversion device 3. The converted yellow light is collected by the first lens assembly 6 and then emitted to the light output lens 4 through the spectroscopic filter 5. 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 such a 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. The technical solution can obtain a light beam with a target effect by controlling the particle size of the scattering particles inside the scattering layer, the ratio of the encapsulation body to the scattering particles, and the thickness of the scattering layer, and then collects the light through the second lens assembly 8, and then irradiates the light-emitting lens 4 after being reflected by the dichroic filter 5. This technical solution controls the diffusion degree of the second diffuser to be 3 to 8 times that of the first diffuser, matches a specific light-transmitting scatterer 7, and uses a second lens assembly 8 with the same optical performance as the first lens assembly 6, so that the second laser emitted by the second laser is completely matched with the converted light of the first laser 1 when it finally irradiates the spectroscopic filter 5, including the beam energy distribution characteristics and the 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, wherein the yellow light is used as the main light source and has a high illumination effect, and the blue light is used as compensation light, thereby obtaining a uniform beam of white light.

[0082] The laser light source of this embodiment can be widely used in laser lighting fields such as car lights, stage lights, searchlights, beam lights, moving head lights, etc., to solve the problem of uneven color of the light beam "yellow edges and blue center", and obtain a uniform high-illuminance white light. Example 2

[0083] A light source system, comprising:

[0084] A first laser light source 1, used for emitting a first laser;

[0085] A second laser light source 2, used for emitting a second laser;

[0086] A wavelength conversion device 3, used for converting at least part of the first laser into converted light;

[0087] A light-emitting lens 4, used for emitting light;

[0088] 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;

[0089] A first lens assembly 6 is provided between the spectroscopic filter 5 and the wavelength conversion device 3;

[0090] 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 a side close to the second laser light source 2; the light-transmitting scatterer 7 includes a scattering layer and a scattering substrate for carrying the scattering layer, and the scattering substrate is located on a 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%, and the thickness of the scattering layer is 8 to 20 μm;

[0091] A first diffuser 9 and a second diffuser 10 are provided between the dichroic 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 1.1°, and the diffusion degree of the second diffuser 10 is 8.8°.

[0092] 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. Example 3

[0093] A light source system, comprising:

[0094] A first laser light source 1, used for emitting a first laser;

[0095] A second laser light source 2, used for emitting a second laser;

[0096] A wavelength conversion device 3, used for converting at least part of the first laser into converted light;

[0097] A light-emitting lens 4, used for emitting light;

[0098] 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;

[0099] A first lens assembly 6 is provided between the spectroscopic filter 5 and the wavelength conversion device 3;

[0100] 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 a side close to the second laser light source 2; the light-transmitting scatterer 7 includes a scattering layer and a scattering substrate for carrying the scattering layer, and the scattering substrate is located on a 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%, and the thickness of the scattering layer is 40 to 60 μm;

[0101] A first diffuser 9 and a second diffuser 10 are respectively provided between the dichroic filter 5 and the first laser light source 1 and the second laser light source 2. The diffusion degree of the first diffuser is 1.3°, and the diffusion degree of the second diffuser is 4°.

[0102] 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. Example 4

[0103] A light source system, comprising:

[0104] A first laser light source 1, used for emitting a first laser;

[0105] A second laser light source 2, used for emitting a second laser;

[0106] A wavelength conversion device 3, used for converting at least part of the first laser into converted light;

[0107] A light-emitting lens 4, used for emitting light;

[0108] 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;

[0109] A first lens assembly 6 is provided between the spectroscopic filter 5 and the wavelength conversion device 3;

[0110] 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 a side close to the second laser light source 2; the light-transmitting scatterer 7 includes a scattering layer and a scattering substrate for carrying the scattering layer, and the scattering substrate is located on a side close to the second laser light source 2, the scattering layer includes a package and scattering particles, and the mass ratio of the package 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%, and the thickness of the scattering layer is 20 to 40 μm;

[0111] A first diffuser 9 and a second diffuser 10 are provided between the dichroic 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°.

[0112] 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. Example 5

[0113] A light source system, comprising:

[0114] A first laser light source 1, used for emitting a first laser;

[0115] A second laser light source 2, used for emitting a second laser;

[0116] A wavelength conversion device 3, used for converting at least part of the first laser into converted light;

[0117] A light-emitting lens 4, used for emitting light;

[0118] 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;

[0119] A first lens assembly 6 is provided between the spectroscopic filter 5 and the wavelength conversion device 3;

[0120] 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 a side close to the second laser light source 2; the light-transmitting scatterer 7 includes a scattering layer and a scattering substrate for carrying the scattering layer, and the scattering substrate is located on a 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 400-500 nm accounts for more than 60%, and the thickness of the scattering layer is 20-40 μm;

[0121] A first diffuser 9 and a second diffuser 10 are provided between the dichroic 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°.

[0122] 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. Comparative Example 1

[0123] A light source system is substantially the same as Example 1, except that the mass ratio of the package to the scattering particles in this comparative example 1 is 15:1. Comparative Example 2

[0124] A light source system is substantially the same as Example 1, except that the thickness of the scattering layer in this comparative example 2 is 70-90 μm. Comparative Example 3

[0125] A light source system is substantially the same as Example 1, except that the scattering particles in this comparative example 3 are powders in which the mass of particles with a particle size of 1 to 3 μm accounts for more than 60%. Comparative Example 4

[0126] 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°. Comparative Example 5

[0127] A light source system is basically the same as Example 1, except that the second lens assembly of this comparative example 5 lacks a third lens compared with Example 1.

[0128] The laser light sources of the above-mentioned embodiments 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, and the second laser light source used a 5W blue laser as the compensation laser. The total power of the light source system was 25W. The illumination and color temperature of the center of the wall spot on the light source in the above embodiments and comparative examples, the loss ratio of the compensation laser after scattering by the light-transmitting scatterer, and the effect of the wall spot and the color uniformity of the light beam were observed. The test methods for each item are as follows:

[0129] (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 output lens of 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. 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.

[0130] (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.

[0131] (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.

[0132] (4) Beam color: Use a 130 mm collimating lens to collimate the light and observe the color uniformity of the mixed beam within a distance of 10 m.

[0133] The test results are shown in Table 1. Figure 2This is a real picture of the light source beam of Example 1. Figure 3 This is a real picture of the light spot on the wall of the light source of Example 1. Figure 4 This is a real picture of the light source beam of comparative example 1. Figure 5 This is a real picture of the light spot on the wall of the light source of comparative example 1.

[0134] Table 1

[0135] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the technical solution 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 in the protection scope 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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