Laser light source and lighting device

Abstract

The present application discloses a laser light source and lighting device, belonging to the field of projection display. The laser light source includes: a laser, a beam splitter component, a first reflector component, a second reflector component, a light combining component, and a fluorescent component. Because the laser beam emitted by the laser in the laser light source only needs to pass through the beam splitter component, the first reflector component, the second reflector component, the fluorescent component, and the light combining component to produce white light, the laser light source contains fewer optical components, thereby reducing the volume of the entire laser light source. In this way, the overall volume of the lighting device integrated with the laser light source is reduced.

Description

Technical Field

[0001] The present application relates to the field of projection display, and in particular to a laser light source and an illumination device. Background Art

[0002] With the development of optoelectronic technology, the requirements for the color rendering of light emitted by lighting devices are becoming increasingly higher. Lighting devices with high color rendering are generally used in medical lighting and projection display.

[0003] Currently, lighting devices typically include a laser light source and other optical components. The laser light source typically includes a laser, a diffuser, a dichroic mirror, a collimating lens assembly, a phosphor wheel, and a relay loop lens assembly. The phosphor wheel has a laser-transmitting area and an excitation area coated with phosphor. The relay loop lens assembly includes an optical deflection system consisting of multiple lenses and multiple reflectors. The laser beam emitted by the laser is diffused by the diffuser, passes through the dichroic mirror, and is collimated by the collimating lens assembly before being directed to the phosphor wheel. When the laser beam strikes the laser-transmitting area of ​​the phosphor wheel, it passes through the laser-transmitting area, deflects through the relay loop lens assembly, and exits through the dichroic mirror. When the laser beam strikes the excitation area coated with phosphor, it excites the phosphor to emit fluorescence, which is then reflected by the collimating lens assembly and directed to the dichroic mirror. After reflection from the dichroic mirror, the light is combined with the laser beam that passed through the dichroic mirror and directed to other optical components (e.g., a homogenizer) at the rear.

[0004] However, current laser light sources include a large number of optical devices, which results in a larger volume of the entire laser light source, and further results in a larger volume of the entire lighting device. Summary of the Invention

[0005] The present invention provides a laser light source and lighting device. This solves the problem of the large overall size of laser light sources in the prior art. The technical solution is as follows:

[0006] In one aspect, a laser light source is provided, comprising:

[0007] Laser, light splitting component, first reflection component, second reflection component, light combining component and fluorescent component;

[0008] The laser is used to emit a laser beam;

[0009] The beam splitter is located at the light-emitting side of the laser, and is used to direct the first laser light in the laser beam to the first reflective component, and to direct the second laser light in the laser beam to the second reflective component;

[0010] The first reflecting component is used to guide the first laser to the light combining component;

[0011] The second reflective component is used to guide the second laser light to the fluorescent component;

[0012] The fluorescent component is used to emit fluorescence toward the second reflective component under the excitation of the second laser;

[0013] The second reflecting component is further used to guide the fluorescent light to the light combining component;

[0014] The light combining component is used to combine the first laser and the fluorescence.

[0015] In another aspect, a lighting device is provided, comprising:

[0016] Laser light source and light homogenizing component, the laser light source is any one of the laser light sources described above.

[0017] The beneficial effects of the technical solutions provided in the embodiments of the present application include at least:

[0018] A laser light source includes: a laser, a beam splitter assembly, a first reflector assembly, a second reflector assembly, a light combining assembly, and a fluorescent assembly. Because the laser beam emitted by the laser in the laser light source only needs to pass through the beam splitter assembly, the first reflector assembly, the second reflector assembly, the fluorescent assembly, and the light combining assembly to produce white light, the laser light source contains fewer optical components, which in turn makes the entire laser light source smaller. This also reduces the overall size of the lighting device incorporating the laser light source. Furthermore, because the laser in the laser light source is an LD laser, the optical expansion of the LD laser is relatively small. This facilitates light collection by the subsequent optical system, effectively improving the efficiency of light energy utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0020] Figure 1 This is a schematic structural diagram of a laser light source provided in an embodiment of the present application;

[0021] Figure 2 This is a schematic diagram of the arrangement of various optical components in a laser light source provided in an embodiment of the present application;

[0022] Figure 3 This is a schematic diagram of the arrangement of fluorescent components and other optical devices in a laser light source provided in an embodiment of the present application;

[0023] Figure 4 This is a schematic diagram of the arrangement of various optical components in another laser light source provided in an embodiment of the present application;

[0024] Figure 5 This is a schematic structural diagram of another laser light source provided in an embodiment of the present application;

[0025] Figure 6 This is a structural block diagram of a lighting device provided in an embodiment of the present application.

[0026] The above drawings illustrate specific embodiments of the present application, which will be described in more detail below. These drawings and the textual description are not intended to limit the scope of the present application in any way, but rather to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments. DETAILED DESCRIPTION

[0027] In order to make the objectives, technical solutions and advantages of this application clearer, the implementation methods of this application will be further described in detail below with reference to the accompanying drawings.

[0028] Please refer to Figure 1 , Figure 1 FIG1 is a schematic diagram of the structure of a laser light source provided in an embodiment of the present application. The laser light source 000 may include: a laser 100, a light splitting component 200, a first reflecting component 300, a second reflecting component 400, a light combining component 500, and a fluorescent component 600.

[0029] The laser 100 in the laser light source 000 can be used to emit a laser beam.

[0030] The spectroscopic component 200 in the laser light source 000 can be located on the light-emitting side of the laser 100, and is used to guide the first laser in the laser beam emitted by the laser 100 to the first reflecting component 300 in the laser light source 000, and to guide the second laser 400 in the laser beam to the second reflecting component 400.

[0031] The first reflective assembly 300 in the laser light source 000 can be used to direct the first laser light toward the light combining assembly 500 in the laser light source 000. The second reflective assembly 400 in the laser light source 000 can be used to direct the second laser light toward the fluorescent assembly 600. The fluorescent assembly 600 can be used to emit fluorescent light toward the second reflective assembly 400 under the excitation of the second laser light. The second reflective assembly 400 can also be used to direct the fluorescent light emitted by the fluorescent assembly 600 toward the light combining assembly 500.

[0032] The light combining component 500 in the laser light source can be used to combine the first laser light in the laser beam and the fluorescence excited by the fluorescence component 600, and emit the combined laser beam.

[0033] Among them, the laser 100 in the laser light source 000 can be used to emit a blue laser to the spectroscopic component 200, and the wavelength of the blue laser can be 445 nanometers to 470 nanometers. In this way, the fluorescent component 600 is excited to produce fluorescence by the short-wavelength blue light, and the blue light is combined with the fluorescence (for example, yellow fluorescence) to form white light, and the white light formed after the combination has good color rendering. For example, the laser 100 can be a semiconductor (English: Laser Diode; abbreviated: LD) laser. The directionality and controllability of the laser emitted by the LD laser are good, and the optical expansion of the laser beam it emits is small. In this way, since the optical expansion of the laser beam emitted by the LD laser is small. Therefore, it is convenient for the subsequent optical system to collect light, effectively improving the utilization efficiency of light energy. It should be noted that in other possible implementations, the laser 100 can also use other types of lasers, such as light emitting diode (English: Light Emitting Diode; abbreviated: LED) lasers.

[0034] It should also be noted that the first laser and the second laser in the laser beam emitted by the laser 100 can both be lasers of the same color, for example, both blue lasers. The second laser is used to illuminate the fluorescent component 600 to excite the fluorescent component 600 to produce fluorescence, and the first laser is used to combine with the fluorescence produced by the fluorescent component 600.

[0035] In the present application, the laser 100 in the laser light source 000 can emit a laser beam, which is first split by the spectrometer component 200; then, the spectrometer component 200 directs the first laser in the laser beam to the first reflective component 300 and directs the second laser to the second reflective component 400; then, the first reflective component 300 directs the first laser to the light combining component 500, and the second reflective component 400 directs the second laser to the fluorescent component 600. The fluorescent component 600 generates fluorescence under the excitation of the second laser, and the fluorescence is directed to the light combining component 500 through the second reflective component 400; finally, the first laser and the fluorescence are combined at the light combining component 500, and the light combining component 500 emits the combined laser beam. In this case, since the laser beam emitted by the laser 100 in the laser light source 000 only needs to pass through the cooperation of the spectrometer component 200, the first reflective component 300, the second reflective component 400, the fluorescent component 600 and the light combining component 500, it can be combined to form white light. As a result, the laser light source 000 includes fewer optical components, resulting in a smaller overall size. This also reduces the overall size of the lighting device incorporating the laser light source 000. Furthermore, because the laser 100 in the laser light source 000 utilizes an LD laser, the LD laser has a smaller etendue. This facilitates light collection by the subsequent optical system, effectively improving the efficiency of light energy utilization.

[0036] In summary, the embodiments of the present application provide a laser light source, which may include: a laser, a spectroscopic component, a first reflective component, a second reflective component, a light combining component, and a fluorescent component. Since the laser light beam emitted by the laser in the laser light source only needs to pass through the cooperation of the spectroscopic component, the first reflective component, the second reflective component, the fluorescent component, and the light combining component, it can generate white light. Therefore, the number of optical devices contained in the laser light source is relatively small, and the volume of the entire laser light source is relatively small. In this way, the overall volume of the lighting device integrated with the laser light source is relatively small. In addition, since the laser in the laser light source adopts an LD laser, the optical expansion of the LD laser is relatively small. Therefore, it is convenient for the subsequent optical system to collect light, effectively improving the utilization efficiency of light energy.

[0037] Optionally, there are multiple possible ways to arrange the optical components in the laser light source 000 in the embodiment of the present application. This embodiment will be schematically described using the following two optional implementations:

[0038] For the first optional implementation, please refer to Figure 2 , Figure 2 It is a schematic diagram of the arrangement of various optical devices in a laser light source provided in an embodiment of the present application. The laser 100, the light-splitting component 200 and the second reflecting component 400 in the laser light source 000 can be arranged sequentially along the target direction (the Y-axis direction in the figure). The arrangement direction of the light-splitting component 200 and the first reflecting component 300 is perpendicular to the target direction, the arrangement direction of the light-combining component 500 and the second reflecting component 400 is perpendicular to the target direction, and the arrangement direction of the first reflecting component 300 and the light-combining component 500 is parallel to the target direction. That is, the arrangement direction of the light-splitting component 200 and the first reflecting component 300 is the X-axis direction in the figure, the arrangement direction of the light-combining component 500 and the second reflecting component 400 is the X-axis direction in the figure, and the arrangement direction of the first reflecting component 300 and the light-combining component 500 is the Y-axis direction in the figure.

[0039] Among them, the beam splitter component 200 can be used to reflect the first laser beam toward the first reflective component 300 and transmit the second laser beam toward the second reflective component 400. In this case, since the arrangement direction of the laser 100, the beam splitter component 200, and the second reflective component 400 in the laser light source 000 is perpendicular to the arrangement direction of the beam splitter component 200 and the first reflective component 300, the arrangement direction of the light combining component 500 and the second reflective component 400 is perpendicular to the arrangement direction of the laser 100, the beam splitter component 200, and the second reflective component 400. In addition, the arrangement direction of the first reflective component 300 and the light combining component 500 is parallel to the arrangement direction of the laser 100, the beam splitter component 200, and the second reflective component 400. Therefore, the arrangement of the laser 100, the beam splitter assembly 200, the first reflector assembly 300, the second reflector assembly 400, and the light combining assembly 500 in the laser light source 000 is relatively compact, thereby making the laser light source 000 smaller in the X-axis direction and smaller in the Y-axis direction in the figure. This reduces the volume of the entire laser light source 000. Furthermore, the laser light source 000 in the embodiment of the present application does not require a relay loop mirror assembly in the optical path, further reducing the volume of the entire laser light source 000.

[0040] For example, the laser 100 in the laser light source 000 can emit a laser beam, which is first split by the spectroscopic component 200; then, the spectroscopic component 200 reflects the first laser in the laser beam toward the first reflecting component 300, and transmits the second laser to the second reflecting component 400; then, the first reflecting component 300 reflects the first laser toward the light combining component 500, and the second reflecting component 400 guides the second laser to the fluorescent component 600, and the fluorescent component 600 generates fluorescence under the excitation of the second laser, and the fluorescent component 600 reflects the fluorescence toward the second reflecting component 400, and the second reflecting component 400 guides the fluorescence to the light combining component 500; finally, the first laser and the fluorescence are combined at the light combining component 500, and the light combining component 500 emits the combined laser beam. For example, the beam splitting component 200 in the laser light source 000 can be a transmission reflector. In actual needs, the transmittance and reflectance of the transmission reflector can be changed by designing the film layer on the transmission reflector differently; the first reflection component 300 can be a reflection mirror that reflects any color laser; the second reflection component 400 can be a dichroic mirror that transmits blue light and reflects fluorescence; the light combining component 500 can be a dichroic mirror that reflects blue light and transmits fluorescence, or the light combining component 500 can be a dichroic mirror that transmits blue light and reflects fluorescence.

[0041] It should be noted that, in the first optional implementation, there are also multiple possible arrangements of the fluorescent component 600 and other optical components in the laser light source 000. The following embodiments of the present application will be schematically described using the following two possible arrangements:

[0042] The first possible situation is Figure 2 As shown, the laser 100, the beam splitter assembly 200, the second reflective assembly 400, and the fluorescent assembly 600 in the laser light source 000 can be arranged sequentially along the target direction. The second reflective assembly 400 can be used to transmit the second laser light toward the fluorescent assembly 600. The second laser light excites the fluorescent assembly 600 to produce fluorescence, and the second reflective assembly 400 reflects the fluorescence toward the light combining assembly 500. The first laser light and the fluorescence light are combined at the light combining assembly 500 and then emitted. That is, the arrangement direction of the laser 100, the beam splitter assembly 200, the second reflective assembly 400, and the fluorescent assembly 600 is the Y-axis direction in the figure.

[0043] For example, the laser 100 in the laser light source 000 can emit a laser beam, which is first split by the spectrometer component 200; then, the spectrometer component 200 reflects the first laser in the laser beam toward the first reflection component 300, and transmits the second laser to the second reflection component 400; then, the first reflection component 300 reflects the first laser toward the light combining component 500, and the second reflection component 400 transmits the second laser toward the fluorescent component 600, and the fluorescent component 600 generates fluorescence under the excitation of the second laser, and the fluorescent component 600 reflects the fluorescence toward the second reflection component 400, and the second reflection component 400 reflects the fluorescence toward the light combining component 500; finally, the first laser and the fluorescence are combined at the light combining component 500.

[0044] For the second possible situation, please refer to Figure 3 , Figure 3 This is a schematic diagram of the arrangement of fluorescent components and other optical devices in a laser light source provided in an embodiment of the present application. The fluorescent component 600, the second reflective component 400 and the light combining component 500 in the laser light source 000 can be arranged sequentially in a direction perpendicular to the target. Among them, the second reflective component 400 can be used to reflect the second laser in the laser beam to the fluorescent component 600, the second laser excites the fluorescent component 600 to produce fluorescence, and the second reflective group 400 transmits the fluorescence to the light combining component 500, and the first laser and the fluorescence are combined at the light combining component 500 and then emitted. That is, the arrangement direction of the fluorescent component 600, the second reflective component 400 and the light combining component 500 is the X-axis direction in the figure.

[0045] For example, the laser 100 in the laser light source 000 can emit a laser beam, which is first split by the spectroscopic component 200; then, the spectroscopic component 200 reflects the first laser in the laser beam toward the first reflecting component 300, and transmits the second laser to the second reflecting component 400; then, the first reflecting component 300 reflects the first laser toward the light combining component 500, and the second reflecting component 400 reflects the second laser toward the fluorescent component 600, and the fluorescent component 600 generates fluorescence under the excitation of the second laser, and the fluorescent component 600 reflects the fluorescence toward the second reflecting component 400, and the second reflecting component 400 transmits the fluorescence toward the light combining component 500; finally, the first laser and the fluorescence are combined at the light combining component 500. For example, the light-splitting component 200 can be a transmitting reflector; the first reflecting component 300 can be a reflector that reflects any color of laser; the second reflecting component 400 can be a dichroic mirror that reflects blue light and transmits fluorescence; the light-combining component 500 can be a dichroic mirror that reflects blue light and transmits fluorescence, or the light-combining component 500 can be a dichroic mirror that transmits blue light and reflects fluorescence.

[0046] For the second optional implementation, please refer to Figure 4 , Figure 4 It is a schematic diagram of the arrangement of various optical devices in another laser light source provided in an embodiment of the present application. The laser 100, the spectroscopic component 200 and the first reflective component 300 in the laser light source 000 can be arranged in sequence along the target direction (i.e., the Y-axis direction in the figure). The arrangement direction of the spectroscopic component 200 and the second reflective component 400 is perpendicular to the target direction, and the arrangement direction of the light combining component 500 and the first reflective component 300 is perpendicular to the target direction. And the fluorescent component 600, the second reflective component 400 and the light combining component 500 can be arranged in sequence along a direction parallel to the target direction. Among them, the spectroscopic component 200 in the laser light source 000 can be used to transmit the first laser beam to the first reflective component 300, and reflect the second laser beam to the second reflective component 400. That is, the arrangement direction of the light-splitting component 200 and the second reflective component 400 is the X-axis direction in the figure, the arrangement direction of the light-combining component 500 and the first reflective component 300 is the X-axis direction in the figure, and the arrangement direction of the fluorescent component 600, the second reflective component 400 and the light-combining component 500 is the Y-axis direction in the figure.

[0047] For example, the laser 100 in the laser light source 000 can emit a laser beam, which is first split by the beam splitter 200. The beam splitter 200 then transmits the first laser beam in the laser beam to the first reflective component 300 and reflects the second laser beam to the second reflective component 400. The first reflective component 300 then reflects the first laser beam to the light combining component 500, and the second reflective component 400 reflects the second laser beam to the fluorescent component 600. The fluorescent component 600 generates fluorescence under the excitation of the second laser beam. The fluorescent component 600 reflects the fluorescence to the second reflective component 400, and the second reflective component 400 transmits the fluorescence to the light combining component 500. Finally, the first laser beam and the fluorescence are combined at the light combining component 500. For example, the beam splitter 200 can be a transmissive reflector; the first reflective component 300 can be a reflector that reflects any color of laser beam; the second reflective component 400 can be a dichroic mirror that reflects blue light and transmits fluorescence; and the light combining component 500 can be a dichroic mirror that reflects fluorescence and transmits blue light.

[0048] In this case, the arrangement direction of the laser 100, the beam splitter assembly 200, and the first reflective assembly 300 is perpendicular to the arrangement direction of the beam splitter assembly 200 and the second reflective assembly 400. The arrangement direction of the laser 100, the beam splitter assembly 200, and the first reflective assembly 300 is also perpendicular to the arrangement direction of the light combining assembly 500 and the first reflective assembly 300, and is parallel to the arrangement direction of the fluorescent assembly 600, the second reflective assembly 400, and the light combining assembly 500. Therefore, the arrangement of the laser 100, the beam splitter assembly 200, the first reflective assembly 300, the second reflective assembly 400, the light combining assembly 500, and the fluorescent assembly 600 in the laser light source 000 is relatively compact. In this way, the volume of the entire laser light source 000 can be reduced.

[0049] In the examples of this application, please refer to Figure 5 , Figure 5This is a schematic diagram of the structure of another laser light source provided in an embodiment of the present application. When the laser 100 and the fluorescent assembly 600 in the laser light source 000 are arranged perpendicular to the target direction, the laser light source 000 may further include a heat sink 700, which can be in contact with both the laser 100 and the fluorescent assembly 600. In this case, the laser 100 generates a certain amount of heat when emitting the laser beam. Furthermore, when the laser beam strikes the fluorescent assembly 600 and excites fluorescence, a portion of the light energy is converted into heat. Therefore, to ensure the proper operation of the laser 100 and the fluorescent assembly 600, the heat sink 700 is required to dissipate heat from the laser 100 and the fluorescent assembly 600. In the present application, by arranging the laser 100 and the fluorescent assembly 600 in the laser light source 000 perpendicular to the target direction, the laser 100 and the fluorescent assembly 600 can share a single heat sink 700 within the laser light source 000. This allows heat generated by the laser 100 and the fluorescent assembly 600 during operation to be dissipated. Furthermore, there is no need to respectively provide a heat dissipation assembly 700 for the laser 100 and the fluorescent assembly 600 , thereby effectively reducing the overall volume of the laser light source 000 .

[0050] Optionally, since the second laser in the laser beam emitted by the laser 100 is used to irradiate the fluorescent component 600 to stimulate fluorescence, the first laser is used to combine with the fluorescence at the light combining component 500 to form white light. Furthermore, in the process of irradiating the fluorescent component 600 to stimulate fluorescence, a portion of the light energy of the second laser is converted into heat energy, and the first laser (i.e., blue light) has a smaller impact on the synthesized white light. Therefore, the proportion of the first laser in the laser beam emitted by the laser 100 is smaller than the proportion of the second laser in the laser beam.

[0051] For example, the proportion of the first laser in the laser beam can be a%, and the proportion of the second laser in the laser beam can be b%. For example, a=10, b=90, that is, 10% of the first laser is reflected by the first reflective component 300 to the light combining component 500, and 90% of the second laser is used to excite the fluorescent component 600 to produce fluorescence, and the fluorescence is combined with the first laser. It should be noted that the proportions of the first laser and the second laser in the laser beam can also be appropriately adjusted according to the different color temperatures of the laser beams, and this embodiment does not make specific limitations on this. For example, the color temperature of blue is usually higher. In actual design needs, when the set color temperature is low, this can be achieved by increasing the proportion of the first laser (i.e., blue light) and reducing the proportion of the second laser; when the set color temperature is high, this can be achieved by reducing the proportion of the first laser and increasing the proportion of the second laser.

[0052] In the embodiments of this application, Figure 5As shown, the fluorescent component 600 in the laser 000 may include a reflective portion 601 and a fluorescent portion 602 located on a side of the reflective portion 601 close to the second reflective component 400. Thus, when the second laser light in the laser beam irradiates the fluorescent portion 602 in the fluorescent component 600, the laser beam excites the fluorescent material on the fluorescent portion 602. The fluorescent material generates fluorescence under the excitation of the laser beam, and the reflective portion 601 reflects the fluorescence.

[0053] In the present application, the fluorescent component 600 can be a fixed fluorescent component, for example, a fixed fluorescent plate. The fixed fluorescent component 600 does not require a driving component, which is beneficial to reducing the space occupied by the fluorescent component 600 in the laser light source 000 and is beneficial to the miniaturization design of the laser light source 000. In addition, in some special optical systems, the non-fixed fluorescent component generates fluorescence alternately under the drive of the driving component. However, the driving component may vibrate when driving the fluorescent component to rotate, which may affect the reliability of the system. The fixed fluorescent component can effectively avoid the undesirable phenomenon of vibration of the fluorescent component compared to the non-fixed fluorescent component. It should be noted that the number of fluorescent components 600 in the present application is at least one. For example, it can be one or two, and the present application does not make any specific restrictions on this.

[0054] Alternatively, the fluorescent material on the fluorescent portion 602 of the fluorescent assembly 600 may be formed by bonding separate phosphor powders into layers using an organic adhesive such as silicone or epoxy resin; or by bonding separate phosphor powders into layers using an inorganic adhesive such as glass; or the fluorescent material may be a fluorescent ceramic, which is a structure with phosphor particles distributed within a continuous ceramic medium. It should be noted that the embodiments of the present application do not impose any specific limitations on the fluorescent material.

[0055] In the embodiment of the present application, the laser 100 in the laser light source 000 can be a blue laser, and both the first laser and the second laser can be blue lasers. The fluorescent component 600 produces yellow fluorescence after being excited by the laser beam. In this way, the blue laser irradiates the fluorescent component 600, stimulating the yellow phosphor in the fluorescent component 600 to produce yellow fluorescence, so that the blue light and the yellow fluorescence are combined into white light. It should be noted that in other possible implementations, the phosphor in the fluorescent component 600 can be red phosphor + green phosphor; or yellow phosphor + green phosphor; or yellow phosphor + red phosphor, and this embodiment of the present application does not specifically limit this.

[0056] In summary, the embodiments of the present application provide a laser light source, which may include: a laser, a spectroscopic component, a first reflective component, a second reflective component, a light combining component, and a fluorescent component. Since the laser light beam emitted by the laser in the laser light source only needs to pass through the cooperation of the spectroscopic component, the first reflective component, the second reflective component, the fluorescent component, and the light combining component, it can generate white light. Therefore, the number of optical devices contained in the laser light source is relatively small, and the volume of the entire laser light source is relatively small. In this way, the overall volume of the lighting device integrated with the laser light source is relatively small. In addition, since the laser in the laser light source adopts an LD laser, the optical expansion of the LD laser is relatively small. Therefore, it is convenient for the subsequent optical system to collect light, effectively improving the utilization efficiency of light energy.

[0057] The present application also provides a lighting device, please refer to Figure 6 , Figure 6 This is a block diagram of the structure of a lighting device provided in an embodiment of the present application. The lighting device may include: a laser light source 000 and a light homogenization component 001. The laser light source 000 may be any of the laser light sources described in the above embodiments. The laser beams emitted by the laser light source 000 are combined and then directed to the light homogenization component 001, which homogenizes the laser beams. The lighting device can be used in medical lighting. For example, the light homogenization component 001 may be a fly-eye lens or a light guide, which is not specifically limited in this embodiment of the present application.

[0058] If instructions are needed, the laser light source 000 can also be used in a laser projection device to provide an illumination beam for imaging of the laser projection device.

[0059] In this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. The term "plurality" refers to two or more than two, unless expressly limited otherwise.

[0060] The above description is merely an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A laser light source, characterized in that: include: Laser, light splitting component, first reflection component, second reflection component, light combining component and fluorescent component; The laser is used to emit a laser beam; The beam splitter is located at the light-emitting side of the laser, and is used to direct the first laser light in the laser beam to the first reflective component, and to direct the second laser light in the laser beam to the second reflective component; The first reflecting component is used to guide the first laser to the light combining component; The second reflective component is used to guide the second laser light to the fluorescent component; The fluorescent component is used to emit fluorescence toward the second reflective component under the excitation of the second laser; The second reflecting component is further used to guide the fluorescent light to the light combining component; The light combining component is used to combine the first laser and the fluorescence.

2. The laser light source according to claim 1, wherein: The laser, the beam splitting component, and the second reflective component are sequentially arranged along a target direction, the beam splitting component and the first reflective component are arranged in a direction perpendicular to the target direction, the light combining component and the second reflective component are arranged in a direction perpendicular to the target direction, and the first reflective component and the light combining component are arranged in a direction parallel to the target direction; The light splitting component is used to reflect the first laser light toward the first reflecting component and transmit the second laser light toward the second reflecting component.

3. The laser light source according to claim 2, wherein: The laser, the light splitting component, the second reflecting component and the fluorescent component are arranged in sequence along the target direction, and the second reflecting component is used to transmit the second laser toward the fluorescent component and reflect the fluorescent light toward the light combining component; Alternatively, the fluorescent component, the second reflective component and the light combining component are arranged sequentially in a direction perpendicular to the target direction, and the second reflective component is used to reflect the second laser toward the fluorescent component and transmit the fluorescence toward the light combining component.

4. The laser light source according to claim 1, wherein: The laser, the beam splitting component, and the first reflective component are sequentially arranged along a target direction, the beam splitting component and the second reflective component are arranged in a direction perpendicular to the target direction, the light combining component and the first reflective component are arranged in a direction perpendicular to the target direction, and the fluorescent component, the second reflective component, and the light combining component are sequentially arranged in a direction parallel to the target direction; The light splitting component is used to transmit the first laser light toward the first reflecting component and reflect the second laser light toward the second reflecting component.

5. The laser light source according to claim 4, characterized in that: The arrangement direction of the laser and the fluorescent component is perpendicular to the target direction. The laser light source further includes a heat dissipation component, which is in contact with both the laser and the fluorescent component.

6. The laser light source according to any one of claims 1 to 5, characterized in that: The proportion of the first laser in the laser beam is smaller than the proportion of the second laser in the laser beam.

7. The laser light source according to any one of claims 1 to 5, characterized in that: The light splitting component is a transmissive reflector, the first reflecting component is a reflector, and the second reflecting component and the light combining component are both dichroic mirrors.

8. The laser light source according to any one of claims 1 to 5, characterized in that: The fluorescent component includes a reflective portion and a fluorescent portion located on a side of the reflective portion close to the second reflective component.

9. The laser light source according to any one of claims 1 to 5, characterized in that: The laser is a blue laser, the first laser and the second laser are both blue lasers, and the fluorescence is yellow fluorescence.

10. A lighting device, characterized in that: It comprises: a laser light source and a light homogenizing component, wherein the laser light source is the laser light source according to any one of claims 1 to 9.

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