A hybrid light source system
By optimizing the optical path design and improving key optical components, the problems of poor spot uniformity and complex optical system in the blue laser-excited phosphor wheel scheme have been solved, achieving efficient light energy utilization and wide color gamut mixing, which is suitable for laser projection and high color gamut lighting.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGZHOU BOWEI TECHNOLOGY CO LTD
- Filing Date
- 2025-07-10
- Publication Date
- 2026-07-21
AI Technical Summary
Existing blue laser-excited phosphor wheel schemes suffer from poor spot uniformity, complex optical systems, and low mixing efficiency between blue LEDs and lasers.
By employing an optimized design of diffusion and beam combining elements, and combining blue laser and blue LED light sources, the diffuser element eliminates the speckle effect caused by laser coherence, and the wavelength-selective reflection and transmission characteristics of the beam combining element achieve efficient beam combining. Furthermore, the rotating fluorescence conversion module and aspherical lens assembly improve the uniformity of the light spot and the light energy utilization rate.
It significantly improves the uniformity of light spot and the efficiency of light energy utilization, simplifies the optical structure, reduces the system size and cost, and takes into account the requirements of high brightness and wide color gamut, making it suitable for laser projection and high color gamut lighting scenarios.
Smart Images
Figure CN224536338U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of optical lighting and display technology, and more specifically, to a hybrid light source system. Background Technology
[0002] In the fields of optical lighting and display technology, white light is widely used in projection equipment, LED lighting, laser displays, and other applications. Traditional white light generation technologies mainly include the following solutions:
[0003] 1. LED-excited phosphor: Blue LEDs are used to excite yellow phosphors (such as YAG:Ce), and white light is generated by mixing blue and yellow light. This solution has a simple structure and low cost, but due to the Stokes energy loss of the phosphor, the luminous efficacy is low and the color gamut is narrow, making it difficult to meet the requirements for high color purity.
[0004] 2. RGB Three-Color Laser Mixing: White light is formed by directly mixing red (R), green (G), and blue (B) light sources, offering advantages such as high color gamut and high brightness. However, this method requires precise optical beam combining design, resulting in a complex system and high cost, which is not conducive to miniaturization and low-cost applications.
[0005] 3. Laser-induced phosphor wheel: A blue laser is used to excite the phosphor wheel to produce yellow light, which is then mixed with some of the transmitted blue light to form white light. However, in existing blue laser-excited phosphor wheel schemes, when the blue laser directly irradiates the phosphor wheel, the high coherence of the laser results in uneven spot distribution, which easily leads to local hot spots, affecting the uniformity of white light mixing and potentially accelerating phosphor aging. Traditional beam combining schemes typically require multiple lens groups, mirrors, and dichroic filters, resulting in a long optical path and complex structure, which is not conducive to miniaturization and lightweight design of the equipment. In addition, in existing technologies, the beam combining of blue LEDs and laser light sources usually adopts a simple optical superposition method, which fails to fully utilize the spectral characteristics of both, resulting in low light energy utilization and limited color temperature adjustment range. Utility Model Content
[0006] The main objective of this invention is to provide a hybrid light source system that addresses the technical problems of poor light spot uniformity, complex optical systems, and low mixing efficiency of blue LEDs and lasers in existing blue laser-excited phosphor wheels.
[0007] This utility model provides a hybrid light source system, including:
[0008] Blue laser source, used to emit the first blue light beam;
[0009] A diffusion element is disposed in the output light path of the blue laser source to homogenize the first blue light beam.
[0010] A beam combiner is tilted and positioned on the outgoing light path of the diffuser to reflect the first blue light beam after homogenization.
[0011] The first lens assembly is used to collimate and focus the reflected first blue light beam.
[0012] A fluorescence conversion module is disposed at the focusing position of the first lens assembly and is used to convert the collimated and focused first blue light beam into yellow light. The first lens assembly is also used to collimate the yellow light in reverse.
[0013] Blue LED light source, used to emit a second blue light beam;
[0014] The second lens assembly is disposed in the output light path of the blue LED light source and is used to collimate and focus the second blue light beam;
[0015] The beam combining element is also used to transmit the collimated yellow light and reflect the collimated and focused second blue light beam to combine the yellow light and the second blue light beam.
[0016] The output lens assembly is used to shape and output the combined beam.
[0017] In one specific embodiment, the diffusion angle of the diffusion element is in the range of 5° to 30°, and the cutoff wavelength of the beam combining element is set in the range of 450nm to 500nm.
[0018] In one specific embodiment, the diffusion element includes a microstructure diffusion sheet or a holographic diffusion sheet, and the beam-combining element includes a Serekert sheet, which is mounted on a rotating adjustment frame.
[0019] In one specific embodiment, the fluorescence conversion module includes a rotating mechanism and a phosphor carrier. The phosphor carrier is mounted on the rotating mechanism and can rotate with the rotating mechanism. A phosphor layer is coated on the phosphor carrier, and the thickness of the phosphor layer is 0.2 mm to 0.5 mm.
[0020] In one specific embodiment, the hybrid light source system further includes a heat dissipation module disposed on the back of the fluorescence conversion module.
[0021] In one specific embodiment, both the first lens assembly and the second lens assembly include aspherical lenses, and the outgoing lens assembly includes a cemented doublet lens.
[0022] In one specific embodiment, the first lens assembly includes a first collimating lens and a first focusing lens, the first collimating lens and the first focusing lens are coaxially mounted through a first lens barrel, and a first adjusting shim is provided between them, the first collimating lens includes an aspherical lens;
[0023] The second lens assembly includes a second collimating lens and a second focusing lens. The second collimating lens and the second focusing lens are coaxially mounted via a second lens barrel, and a second adjusting shim is provided between them. The second collimating lens includes an aspherical lens.
[0024] In one specific embodiment, the blue laser source includes a laser emitter and a mounting bracket, wherein the laser emitter is mounted on the mounting bracket;
[0025] The blue LED light source includes an LED chip and a heat sink, with the LED chip mounted on the heat sink.
[0026] In one specific embodiment, the size of the emitting surface of the blue LED light source is matched with the laser spot size of the blue laser light source.
[0027] In one specific embodiment, the wavelength range of the first blue light beam is 440nm to 460nm, the wavelength range of the second blue light beam is 450nm to 470nm, and the wavelength range of the yellow light is 550nm to 600nm.
[0028] Beneficial effects:
[0029] This invention discloses a hybrid light source system that significantly improves light spot uniformity and light energy utilization through optimized design of diffusion and beam combining elements. It employs a dual-light source (laser + LED) hybrid scheme, balancing high brightness and wide color gamut requirements with high mixing efficiency. The simplified optical structure reduces the number of lenses, thereby lowering system size and cost. Therefore, this invention is particularly suitable for applications such as laser projection and high color gamut lighting, offering advantages such as high efficiency, stability, and compactness. Attached Figure Description
[0030] Figure 1 This is a schematic diagram of the structure and optical path of a hybrid light source system provided in one embodiment of the present invention;
[0031] Figure 2 This is a three-dimensional structural diagram of a hybrid light source system provided in an embodiment of the present invention.
[0032] Explanation of key component symbols:
[0033] 1. Blue laser source; 11. Laser emitter; 12. Mounting bracket; 2. Diffuser; 3. Beam combiner; 4. First lens assembly; 41. First collimating lens; 42. First focusing lens; 5. Fluorescence conversion module; 51. Rotation mechanism; 52. Phosphor carrier; 6. Blue LED source; 61. LED chip; 62. Heat sink; 7. Second lens assembly; 71. Second collimating lens; 72. Second focusing lens; 8. Outgoing lens assembly.
[0034] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0035] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.
[0036] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly and specifically defined.
[0037] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0038] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0039] Please see Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the structure and optical path of a hybrid light source system according to an embodiment of the present invention. Figure 2 This is a three-dimensional structural diagram of a hybrid light source system provided in an embodiment of the present invention.
[0040] A hybrid light source system according to an embodiment of this utility model includes:
[0041] Blue laser source 1, used to emit the first blue light beam;
[0042] A diffusion element 2 is disposed on the output light path of the blue laser source 1 and is used to homogenize the first blue light beam.
[0043] The beam combining element 3 is inclinedly disposed on the outgoing light path of the diffuser element 2, and is used to reflect the first blue light beam after the light homogenization process;
[0044] The first lens assembly 4 is used to collimate and focus the reflected first blue light beam.
[0045] The fluorescence conversion module 5 is located at the focusing position of the first lens assembly 4 and is used to convert the collimated and focused first blue light beam into yellow light. The first lens assembly 4 is also used to collimate the yellow light in reverse.
[0046] Blue LED light source 6, used to emit a second blue light beam;
[0047] The second lens assembly 7 is disposed in the output light path of the blue LED light source 6 and is used to collimate and focus the second blue light beam;
[0048] The beam combining element 3 is also used to transmit the collimated yellow light and reflect the collimated and focused second blue light beam to combine the yellow light and the second blue light beam.
[0049] The output lens assembly 8 is used to shape and output the combined beam.
[0050] Please see Figure 1 The optical path operation of a hybrid light source system according to this utility model is as follows:
[0051] The first blue light beam emitted by the blue laser source 1 is homogenized by the diffuser 2, then incident on the beam combiner 3 and reflected by it. The reflected first blue light beam is focused by the first lens assembly 4 onto the fluorescence conversion module 5, which excites and generates yellow light. The yellow light is collimated by the first lens assembly 4 in reverse direction and then transmitted through the beam combiner 3. The second blue light beam emitted by the blue LED source 6 is collimated by the second lens assembly 7, then incident on the beam combiner 3 and reflected by it. The yellow light transmitted through the beam combiner 3 and the reflected second blue light beam coincide in space and together pass through the exit lens assembly 8 to form mixed white light.
[0052] Specifically, the first blue light beam emitted by the blue laser first passes through the diffusion element 2, and after homogenization, is incident on the beam combiner element 3. The beam combiner element 3, based on its wavelength selectivity, reflects the first blue light beam to the first lens assembly 4. The first lens assembly 4 collimates the first blue light beam and focuses it onto a specific area of the fluorescence conversion module 5. The phosphor on the yellow fluorescence conversion module 5, excited by the first blue light beam, generates yellow light. This yellow light passes back through the first lens assembly 4 and is re-collimated before being transmitted through the beam combiner element 3. Simultaneously, the second blue light beam emitted by the blue LED light source 6 is shaped by the second lens assembly 7, incident at a specific angle on the beam combiner element 3, and reflected. The two beams spatially overlap and together pass through the exit lens assembly 8 to form a uniform white light output.
[0053] Compared to existing technologies, the hybrid light source system of this invention significantly improves light spot uniformity and light energy utilization through optimized design of the diffuser element 2 and the beam combiner element 3; it adopts a dual-light source (laser + LED) hybrid scheme, balancing high brightness and wide color gamut requirements with high mixing efficiency; and it simplifies the optical structure, reduces the number of lenses, and lowers system size and cost. Therefore, this invention is particularly suitable for applications such as laser projection and high color gamut lighting, and has advantages such as high efficiency, stability, and compactness.
[0054] Specifically, in this invention, the blue laser source 1 serves as the main excitation source of the hybrid light source system, used to generate a high-intensity first blue light beam (wavelength range: 440nm~460nm).
[0055] Please see Figure 1 and Figure 2 In one specific embodiment, the blue laser source 1 includes a laser emitter 11 and a mounting bracket 12, wherein the laser emitter 11 is mounted on the mounting bracket 12.
[0056] In this embodiment, the mounting bracket 12 is a precision adjustment bracket, which can be adjusted in three-dimensional space to adjust the spatial position of the laser emitter 11.
[0057] Optionally, the hybrid light source system includes a housing (not shown). Figure 1 and Figure 2 All the components shown are housed within the housing, and the mounting bracket 12 is mounted on the housing to fix the laser emitter 11.
[0058] Please see Figure 1 and Figure 2 The diffusion element 2 is disposed on the output light path of the blue laser source 1 to homogenize the first blue light beam, thereby eliminating the speckle effect caused by laser coherence and improving the uniformity of the light spot.
[0059] Specifically, the diffuser element 2 is made of special optical material and has a precise microstructure on its surface. Its main function is to homogenize the laser beam, eliminate the interference fringes unique to lasers, and improve the uniformity of the light spot.
[0060] In one specific embodiment, the diffusion element 2 includes a microstructure diffusion sheet or a holographic diffusion sheet.
[0061] In this embodiment, the surface of the microstructure diffuser or holographic diffuser has a precise microstructure, which can homogenize the first blue light beam, ensure that the spot of the first blue light beam is evenly distributed, and avoid local overheating.
[0062] In one specific embodiment, the diffusion angle of the diffusion element 2 is in the range of 5° to 30°.
[0063] In this embodiment, within a diffusion angle range of 5° to 30°, the diffusion element 2 can effectively eliminate the speckle effect caused by laser coherence and improve the uniformity of the light spot.
[0064] Please see Figure 1 and Figure 2 The beam combiner 3 is tilted on the outgoing light path of the diffuser 2 and has wavelength selective reflection and transmission characteristics. It is configured to reflect blue light (wavelength < 500 nm) and transmit yellow light (wavelength > 500 nm).
[0065] This invention utilizes the wavelength-selective reflection and transmission characteristics of the beam combiner element 3 to achieve efficient beam combining of blue and yellow light. Compared to traditional beam combining schemes that require 3-4 reflectors or beam splitters, this invention only requires one beam combiner element 3, reducing the number of optical components, simplifying the optical system, reducing system complexity, and lowering costs.
[0066] In this embodiment, as Figure 1As shown, the beam combining element 3 includes a first side and a second side, which are opposite each other. The blue laser source 1, the first lens assembly 4 and the fluorescence conversion module 5 are all disposed on the first side, and the blue LED source 6, the second lens assembly 7 and the output lens assembly 8 are all disposed on the second side. The beam combining element 3 can reflect the first blue light beam after homogenization, transmit the collimated yellow light, and reflect the collimated and focused second blue light beam to combine the yellow light and the second blue light beam.
[0067] In one specific embodiment, the cutoff wavelength of the beam combining element 3 is set at 450nm to 500nm.
[0068] In this embodiment, the cutoff wavelength of the beam combiner 3 is set in the range of 450nm to 500nm, with a reflectivity of more than 99.99% for short-wavelength blue light (<500nm) and a transmittance of more than 99.99% for long-wavelength yellow light (>500nm).
[0069] In one specific embodiment, the bundle-combining element 3 includes a Serekot plate, which is mounted on a rotating adjustment frame (not shown).
[0070] In this embodiment, the Serrecote optical element is fabricated using multilayer dielectric film coating technology and possesses precise wavelength selectivity. This element is mounted at a specific angle on a rotating adjustment frame, allowing for fine-tuning of the reflection angle.
[0071] Specifically, the Serrecote film uses an optical-grade glass substrate with a precision optical thin film coated on its surface. The thin film design employs a multi-layer structure of alternating high and low refractive index materials, achieving specific wavelength selectivity by controlling the thickness of each layer. The Serrecote film is mounted on a rotary adjustment frame with a graduated scale, allowing for precise adjustment of the reflection angle.
[0072] Optionally, the rotating adjustment bracket is mounted on the housing of the hybrid light source system.
[0073] Please see Figure 1 and Figure 2 The first lens assembly 4 is disposed on the first side of the beam combining element 3 and consists of at least two lenses, used to collimate and focus the first blue light beam reflected by the beam combining element 3.
[0074] In one specific embodiment, the first lens assembly 4 includes an aspherical lens.
[0075] Since lasers are single-wavelength light sources, aberrations often hinder the achievement of diffraction-limited performance when focusing or collimating light using a single spherical lens. Aspherical lenses, by optimizing their surface shape, can perfectly solve the aberration problem, thereby achieving precise collimation of the laser. Therefore, in this embodiment, the aspherical lens of the first lens assembly 4 is used to correct aberrations and improve light energy utilization.
[0076] In one specific embodiment, such as Figure 1 and Figure 2 As shown, the first lens assembly 4 includes a first collimating lens 41 and a first focusing lens 42. The first collimating lens 41 and the first focusing lens 42 are coaxially mounted through a first lens barrel (not shown), and a first adjusting shim (not shown) is provided between them. The first collimating lens 41 includes an aspherical lens.
[0077] In this embodiment, the first lens assembly 4 adopts a multi-lens combination design, forming a composite optical system composed of multiple lenses. The first lens assembly 4 includes a first collimating lens 41 and a first focusing lens 42. Each lens is coaxially mounted via a precision first lens barrel, and the distance between each lens is adjusted via a precision first adjusting shim. The first collimating lens 41 includes an aspherical lens for aberration correction.
[0078] Optionally, the first lens barrel comprises a black anodized aluminum lens barrel, with matting threads on the inner wall of the first lens barrel to reduce stray light. The spacing between each lens is controlled by a precision-machined spacer ring, and the assembly process is carried out in a clean environment.
[0079] Optionally, the first lens barrel is mounted on the housing of the hybrid light source system.
[0080] Please see Figure 1 and Figure 2 The fluorescence conversion module 5 is located at the focusing position of the first lens assembly 4 and is used to convert the collimated and focused first blue light beam into yellow light (wavelength range: 550nm~600nm), and then collimate the yellow light in reverse through the first lens assembly 4.
[0081] In existing blue laser-excited phosphor wheels, the phosphor wheels are prone to thermal quenching under prolonged high-power excitation, leading to decreased fluorescence conversion efficiency and color temperature drift, which affects the stability and lifespan of the light source.
[0082] To address the aforementioned issues of low fluorescence conversion efficiency and poor thermal stability, in one specific embodiment, such as... Figure 1 and Figure 2 As shown, the fluorescence conversion module 5 includes a rotating mechanism 51 and a phosphor carrier 52. The phosphor carrier 52 is mounted on the rotating mechanism 51 and can rotate with the rotating mechanism 51. A phosphor layer is coated on the phosphor carrier 52.
[0083] In this embodiment, the fluorescence conversion module 5 adopts a rotary structure. During operation, the rotation mechanism 51 of the fluorescence conversion module 5 can rotate to avoid local overheating of the phosphor layer on the phosphor carrier 52 due to continuous excitation by the first blue light beam, thereby improving the fluorescence conversion efficiency and thermal stability.
[0084] Specifically, the phosphor carrier 52 includes a metal disk, the surface of which is uniformly coated with phosphor material, the phosphor being YAG:Ce or silicate phosphor. During operation, the rotating mechanism 51 rotates, causing the metal disk to rotate at high speed around the axis of the rotating mechanism 51, thus preventing localized overheating of the phosphor layer on the metal disk.
[0085] In one specific embodiment, the thickness of the phosphor layer is 0.2 mm to 0.5 mm.
[0086] In one specific embodiment, the hybrid light source system further includes a heat dissipation module (not shown) disposed on the back of the fluorescence conversion module 5.
[0087] In this embodiment, the fluorescence conversion module 5 is equipped with a heat dissipation module, which can actively dissipate heat from the fluorescence conversion module 5.
[0088] In one specific embodiment, the heat dissipation module includes heat dissipation fins and a temperature sensor. The heat dissipation fins and the temperature sensor are integrated on the back of the fluorescence conversion module 5. The temperature sensor is used to collect the temperature of the fluorescence conversion module 5 in real time, and the heat dissipation fins are used to dissipate heat from the fluorescence conversion module 5 to achieve active temperature control.
[0089] Optionally, the fluorescence conversion module 5 and the heat dissipation module are encapsulated in the same protective housing, leaving only the optical window exposed.
[0090] Optionally, the fluorescence conversion module 5 and the heat dissipation module are jointly mounted on the housing of the hybrid light source system.
[0091] When the hybrid light source system is started, the rotating mechanism 51 and heat dissipation module of the fluorescence conversion module 5 are activated first. After the rotation speed of the rotating mechanism 51 stabilizes, the blue laser light source 1 and the blue LED light source 6 are turned on sequentially. The first blue light beam emitted by the blue laser light source 1 is homogenized by the diffusion element 2 and then reflected by the Serekert plate into the first lens assembly 4, where it is focused and excites the phosphor on the phosphor carrier 52 to produce yellow light. The yellow light passes through the first lens assembly 4 in reverse and is then transmitted through the Serekert plate. At the same time, the second blue light beam emitted by the blue LED light source 6 passes through the second lens assembly 7, is reflected by the Serekert plate, and is combined with the yellow light before being output through the output lens assembly 8.
[0092] In addition, the hybrid light source system can be equipped with a light feedback circuit, which can monitor the output light characteristics in real time and adjust the power of each light source accordingly.
[0093] Please see Figure 1 and Figure 2The blue LED light source 6 is disposed on the second side of the beam combining element 3 and is used to emit a second blue light beam (wavelength range: 450nm~470nm). The second blue light beam serves as an auxiliary blue light, which can supplement the deficiency of the spectrum of the first blue light beam. The color gamut coverage of the mixed white light is increased, which is better than the single laser solution. The light energy utilization rate is improved and the power consumption is reduced.
[0094] In one specific embodiment, such as Figure 1 and Figure 2 As shown, the blue LED light source 6 includes an LED chip 61 and a heat sink 62, with the LED chip 61 mounted on the heat sink 62.
[0095] In this embodiment, the blue LED light source 6 uses a high-power LED chip 61, which is mounted on a dedicated heat sink 62. A second lens assembly 7 is disposed in front of the blue LED light source 6 to optimize the light emission characteristics.
[0096] In one specific embodiment, the size of the emitting surface of the blue LED light source 6 is matched with the laser spot of the blue laser light source 1.
[0097] In this embodiment, the size of the light-emitting surface of the blue LED light source 6 is matched with the laser spot, and the divergence angle of the second blue light beam is adjusted by the second lens assembly 7 to ensure efficient mixing of the second blue light beam and the yellow light.
[0098] Please see Figure 1 and Figure 2 The second lens assembly 7 is disposed in the output light path of the blue LED light source 6 and consists of at least two lenses, used to shape the second blue light beam emitted by the blue LED light source 6.
[0099] In one specific embodiment, the second lens assembly 7 includes an aspherical lens.
[0100] In this embodiment, the aspherical lens of the second lens assembly 7 is used to correct aberrations and improve light energy utilization.
[0101] In one specific embodiment, such as Figure 1 and Figure 2 As shown, the second lens assembly 7 includes a second collimating lens 71 and a second focusing lens 72. The second collimating lens 71 and the second focusing lens 72 are coaxially mounted through a second lens barrel (not shown), and a second adjusting shim (not shown) is provided between them. The second collimating lens 71 includes an aspherical lens.
[0102] In this embodiment, the second lens assembly 7 employs a multi-lens combination design, forming a composite optical system composed of multiple lenses. The second lens assembly 7 includes a second collimating lens 71 and a second focusing lens 72. Each lens is coaxially mounted via a precision second lens barrel, and the distance between the lenses is adjusted using a precision second adjusting shim. The second collimating lens 71 includes an aspherical lens for aberration correction.
[0103] Optionally, the second lens barrel comprises a black anodized aluminum lens barrel, with matting threads on the inner wall to reduce stray light. The spacing between the lenses is controlled by precision-machined spacer rings, and the assembly process is carried out in a clean environment.
[0104] Optionally, the second lens barrel is mounted on the housing of the hybrid light source system.
[0105] Please see Figure 1 and Figure 2 The output lens assembly 8 is located on the second side of the beam combining element 3 and is the final beam combining and output assembly, used to shape and output the mixed beam.
[0106] In one specific embodiment, the outgoing lens assembly 8 includes a cemented doublet lens.
[0107] In this embodiment, the outgoing lens assembly 8 includes a cemented doublet lens, which is designed to reduce chromatic aberration and optimize white light uniformity.
[0108] This invention uses a beam-combining optimization design to mix the spectra of the blue LED light source 6 and the blue laser light source 1, thereby expanding the color temperature adjustment range and improving the quality of white light.
[0109] In summary, addressing the problems of low fluorescence conversion efficiency, poor spot uniformity, complex optical systems, and low mixing efficiency of blue LEDs and blue lasers in existing technologies, this invention achieves the following significant advantages through optimized optical path design, improved key optical components, and collaborative control strategies:
[0110] (1) Improved fluorescence conversion efficiency and thermal stability: A rotating fluorescence conversion module 5 combined with a diffuser element 2 is used for light homogenization, and the focusing performance of the first lens assembly 4 is optimized. The diffuser element 2 effectively homogenizes the laser spot of the first blue light beam, avoiding local overheating and reducing the risk of thermal quenching of the phosphor on the fluorescence conversion module 5. In addition, the rotating fluorescence conversion module 5 reduces the heat load through dynamic heat dissipation, thereby improving fluorescence conversion efficiency and significantly enhancing color temperature stability.
[0111] (2) Improve the uniformity of the light spot: A diffusion element 2 with a microstructure is added in the path of the first blue light beam. The diffusion element 2 eliminates the speckle effect caused by laser coherence, thus improving the uniformity of the light spot. Aberrations are corrected by using the first lens assembly 4 and the second lens assembly 7 of aspherical lenses. The aspherical lens group effectively suppresses spherical aberration and coma, ensuring that the spatial distribution of yellow light and blue light is consistent during synthesis, and avoiding color separation.
[0112] (3) Simplify the optical system and reduce costs: By utilizing the wavelength-selective reflection and transmission characteristics of the beam combiner 3, efficient beam combining of blue and yellow light is achieved, reducing the number of optical components. Traditional beam combining schemes require 3-4 mirrors or beam splitters, while this invention only requires 1 beam combiner 3, thus reducing the number of optical components.
[0113] (4) Improve the mixing efficiency of blue LED and blue laser: Through precise wavelength control of the beam combining element 3 and collimation optimization of the second lens assembly 7, spectral complementarity is achieved. The blue LED light source 6 supplements the spectral deficiencies of the blue laser light source 1, increasing the color gamut coverage of the mixed white light, which is superior to the single laser solution. Light energy utilization is improved and power consumption is reduced.
[0114] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural or procedural transformations made based on the content of the present utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present utility model.
Claims
1. A hybrid light source system, characterized in that, include: Blue laser source, used to emit the first blue light beam; A diffusion element is disposed in the output light path of the blue laser source to homogenize the first blue light beam. A beam combiner is tilted and positioned on the outgoing light path of the diffuser to reflect the first blue light beam after homogenization. The first lens assembly is used to collimate and focus the reflected first blue light beam. A fluorescence conversion module is disposed at the focusing position of the first lens assembly and is used to convert the collimated and focused first blue light beam into yellow light. The first lens assembly is also used to collimate the yellow light in reverse. Blue LED light source, used to emit a second blue light beam; The second lens assembly is disposed in the output light path of the blue LED light source and is used to collimate and focus the second blue light beam; The beam combining element is also used to transmit the collimated yellow light and reflect the collimated and focused second blue light beam to combine the yellow light and the second blue light beam. The output lens assembly is used to shape and output the combined beam.
2. The hybrid light source system according to claim 1, characterized in that, The diffusion angle of the diffusion element is in the range of 5° to 30°, and the cutoff wavelength of the beam combining element is set in the range of 450nm to 500nm.
3. The hybrid light source system according to claim 1, characterized in that, The diffusion element includes a microstructure diffusion sheet or a holographic diffusion sheet, and the beam-combining element includes a Serekert sheet, which is mounted on a rotating adjustment frame.
4. The hybrid light source system according to claim 1, characterized in that, The fluorescence conversion module includes a rotating mechanism and a phosphor carrier. The phosphor carrier is mounted on the rotating mechanism and can rotate with the rotating mechanism. A phosphor layer is coated on the phosphor carrier, and the thickness of the phosphor layer is 0.2 mm to 0.5 mm.
5. The hybrid light source system according to claim 4, characterized in that, The hybrid light source system also includes a heat dissipation module disposed on the back of the fluorescence conversion module.
6. The hybrid light source system according to any one of claims 1-5, characterized in that, Both the first lens assembly and the second lens assembly include aspherical lenses, and the outgoing lens assembly includes a cemented doublet lens.
7. The hybrid light source system according to claim 6, characterized in that, The first lens assembly includes a first collimating lens and a first focusing lens. The first collimating lens and the first focusing lens are coaxially mounted through a first lens barrel, and a first adjusting shim is provided between them. The first collimating lens includes an aspherical lens. The second lens assembly includes a second collimating lens and a second focusing lens. The second collimating lens and the second focusing lens are coaxially mounted via a second lens barrel, and a second adjusting shim is provided between them. The second collimating lens includes an aspherical lens.
8. The hybrid light source system according to any one of claims 1-5, characterized in that, The blue laser source includes a laser emitter and a mounting bracket, wherein the laser emitter is mounted on the mounting bracket; The blue LED light source includes an LED chip and a heat sink, with the LED chip mounted on the heat sink.
9. The hybrid light source system according to any one of claims 1-5, characterized in that, The size of the emitting surface of the blue LED light source is matched with the laser spot size of the blue laser light source.
10. The hybrid light source system according to any one of claims 1-5, characterized in that, The wavelength range of the first blue light beam is 440nm to 460nm, the wavelength range of the second blue light beam is 450nm to 470nm, and the wavelength range of the yellow light is 550nm to 600nm.