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 assembly, a reflector, a light guide lens assembly, a light combining lens assembly, a first fluorescent assembly, and a second 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 reflector, the light guide lens assembly, the light combining lens assembly, the first fluorescent assembly, and the second fluorescent assembly to produce white light, the laser light source contains fewer optical components, thereby reducing the volume of the entire laser light source. As a result, 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, beam splitter, reflector, light guide lens assembly, light combining lens assembly, first fluorescent assembly and second fluorescent assembly;

[0008] The laser is used to emit a laser beam to the light splitting component;

[0009] The beam splitter assembly is used to direct the first laser light in the laser beam to the reflector, and to direct the second laser light in the laser beam to the light guide mirror assembly;

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

[0011] The light guide mirror assembly is used to guide a portion of the second laser light to the first fluorescent component, and to guide another portion of the second laser light to the second fluorescent component;

[0012] The first fluorescent component is used to reflect the first fluorescent light toward the light guide mirror assembly under the excitation of a portion of the second laser light;

[0013] The second fluorescent component is used to reflect second fluorescent light toward the light guide mirror assembly under the excitation of another part of the second laser;

[0014] The light guide mirror group is further used to guide the first fluorescence and the second fluorescence to the light combining mirror group;

[0015] The light combining mirror assembly is used to combine the first laser, the first fluorescence and the second fluorescence.

[0016] In another aspect, a lighting device is provided, comprising:

[0017] Laser light source and light homogenizing component, the laser light source is any one of the laser light sources described above.

[0018] The beneficial effects of the technical solutions provided in the embodiments of the present application include at least:

[0019] A laser light source includes: a laser, a beam splitter, a reflector, a light guide lens group, a light combining lens group, a first fluorescent component, and a second fluorescent component. Because the laser beam emitted by the laser in the laser light source only needs to pass through the beam splitter, reflector, light guide lens group, light combining lens group, first fluorescent component, and second fluorescent component 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 etendue 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

[0020] 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.

[0021] Figure 1 This is a schematic structural diagram of a laser light source provided in an embodiment of the present application;

[0022] Figure 2This is a schematic diagram of the arrangement of various optical components in a laser light source provided in an embodiment of the present application;

[0023] Figure 3 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 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;

[0025] Figure 5 This is a schematic structural diagram of another laser light source provided in an embodiment of the present application;

[0026] Figure 6 This is a structural block diagram of a lighting device provided in an embodiment of the present application.

[0027] 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

[0028] 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.

[0029] Please refer to Figure 1 , Figure 1 The laser light source 000 may include: a laser 100, a beam splitter 200, a reflector 300, a light guide lens assembly 400, a light combiner 500, a first fluorescent assembly 600, and a second fluorescent assembly 700.

[0030] The laser 100 in the laser light source 000 can be used to emit a laser beam to the light splitting component 200 .

[0031] The spectrometer component 200 in the laser light source 000 can be located on the light-emitting side of the laser 100 , and can be used to guide the first laser in the laser beam emitted by the laser 100 to the reflector 300 in the laser light source 000 , and to guide the second laser in the laser beam to the light guide mirror assembly 400 .

[0032] The reflector 300 in the laser light source 000 can be used to guide the first laser light in the laser beam to the light combining lens assembly 500 .

[0033] The light guide lens assembly 400 in the laser light source 000 can be used to guide a portion of the second laser light in the laser beam emitted by the laser 100 to the first fluorescent assembly 600 , and to guide another portion of the second laser light to the second fluorescent assembly 700 .

[0034] The first fluorescent component 600 in the laser light source 000 can be used to reflect the first fluorescent light toward the light guide mirror assembly 400 under the excitation of a portion of the second laser light.

[0035] The second fluorescent component 700 in the laser light source 000 can be used to reflect the second fluorescent light toward the light guide mirror assembly 400 under the excitation of another part of the second laser.

[0036] The light guide lens assembly 400 in the laser light source 000 can also be used to guide the first fluorescence generated by a portion of the second laser stimulating the first fluorescent component 600 and the second fluorescence generated by another portion of the second laser stimulating the second fluorescent component 700 to the light combining lens assembly 500.

[0037] The light combining lens group 500 in the laser light source 000 can be used to combine the first laser light, the first fluorescence generated by excitation, and the second fluorescence in the laser beam, and emit the combined laser beam.

[0038] The laser 100 in the laser light source 000 can be used to emit blue laser light to the spectrometer component 200. The wavelength of the blue laser light can be 445 nanometers to 470 nanometers. In this way, the short-wavelength blue light is used to excite the fluorescent components (i.e., the first fluorescent component and the second fluorescent component) to produce fluorescence. The blue light is combined with the first fluorescent component and the second fluorescent component (for example, one of the first fluorescent component and the second fluorescent component is red fluorescence and the other is green fluorescence) to form white light. 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 laser light emitted by the LD laser has good directionality and controllability, and the optical etendue of the laser beam it emits is small. In this way, because the optical etendue of the laser beam emitted by the LD laser is small, it is convenient for the subsequent optical system to collect the light, effectively improving the utilization efficiency of the 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.

[0039] 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 of the same color, for example, blue laser. A portion of the second laser is used to illuminate the first fluorescent component 600 to stimulate the production of a first fluorescent light, while another portion of the second laser is used to illuminate the second fluorescent component 700 to stimulate the production of a second fluorescent light. The first laser is used to combine with the first and second fluorescent lights.

[0040] 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; thereafter, the spectrometer component 200 guides the first laser in the laser beam to the reflector 300, and guides the second laser in the laser beam to the light guide mirror group 400; then, the reflector 300 guides the first laser to the light combining mirror group 500, and the light guide mirror group 400 guides a portion of the second laser to the first fluorescent component 600, and the first fluorescent component 600 generates a first fluorescence under the excitation of a portion of the second laser, and the first fluorescence is guided to the light combining mirror group 500 through the light guide mirror group 400; the light guide mirror group 400 also guides another portion of the second laser to the second fluorescent component 700, and the second fluorescent component 700 generates a second fluorescence under the excitation of another portion of the second laser, and the second fluorescence is guided to the light combining mirror group 500 through the light guide mirror group 400; finally, the first laser, the first fluorescence and the second fluorescence are combined at the light combining mirror group 500, and the light combining mirror group 500 emits the combined laser beam. In this case, the laser beam emitted by the laser 100 in the laser light source 000 only needs to pass through the beam splitter 200, reflector 300, light guide lens assembly 400, light combiner assembly 500, first fluorescent assembly 600, and second fluorescent assembly 700 to produce white light. Therefore, the laser light source 000 contains fewer optical components, which in turn makes the entire laser light source 000 smaller. This also reduces the overall size of the lighting device incorporating the laser light source 000. Furthermore, since the laser in the laser light source is 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.

[0041] In summary, the embodiments of the present application provide a laser light source, which may include: a laser, a beam splitter, a reflector, a light guide lens group, a light combiner lens group, a first fluorescent component, and a second 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 beam splitter, the reflector, the light guide lens group, the light combiner lens group, the first fluorescent component, and the second fluorescent component, it can generate white light. Therefore, the number of optical devices included 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.

[0042] 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 possible implementations:

[0043] For the first optional implementation, please refer to Figure 2 , 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. When the light guide mirror group 400 and the light combining mirror group 500 in the laser light source 000 can each include a dichroic mirror, the laser 100, the light splitting component 200 and the reflector 300 in the laser light source 000 can be arranged sequentially along the target direction (the Y-axis direction in the figure). The light splitting component 200, the light guide mirror group 400 and the first fluorescent component 600 can be arranged sequentially perpendicular to the target direction. The arrangement direction of the light combining mirror group 500 and the reflector 300 can be perpendicular to the target direction, and the second fluorescent component 700, the light guide mirror group 400 and the light combining mirror group 500 can be arranged sequentially parallel to the target direction. That is, the arrangement direction of the light splitting component 200, the light guide mirror group 400 and the first fluorescent component 600 is the X-axis direction in the figure, and the arrangement direction of the light combining mirror group 500 and the reflector 300 is the X-axis direction in the figure. The arrangement direction of the second fluorescent assembly 700 , the light guide lens assembly 400 and the light combining lens assembly 500 is the Y-axis direction in the figure.

[0044] The beam splitter assembly 200 can be used to transmit the first laser beam toward the reflector 300 and reflect the second laser beam toward the light guide assembly 400. The light guide assembly 400 can be used to transmit a portion of the second laser beam toward the first fluorescent assembly 600 and reflect the first fluorescent light generated by the first fluorescent assembly 600 toward the light combiner assembly 500. The light guide assembly 400 can also be used to reflect another portion of the second laser beam toward the second fluorescent assembly 700 and transmit the second fluorescent light generated by the second fluorescent assembly 700 toward the light combiner assembly 500. The light combiner assembly 500 is used to reflect the first and second fluorescent light and transmit the first laser beam, so that the first laser beam, the first fluorescent light, and the second fluorescent light are combined at the light combiner assembly 500 and then emitted.

[0045] In this case, the arrangement of the laser 100, beam splitter assembly 200, and reflector 300 is perpendicular to the arrangement of the beam splitter assembly 200, light guide lens assembly 400, and first fluorescent assembly 600, and is also perpendicular to the arrangement of the light combiner assembly 500 and reflector 300. Furthermore, the arrangement of the second fluorescent assembly 700, light guide lens assembly 400, and light combiner assembly 500 is parallel to the arrangement of the laser 100, beam splitter assembly 200, and reflector 300. Therefore, the arrangement of the laser 100, beam splitter assembly 200, reflector 300, light guide lens assembly 400, light combiner assembly 500, first fluorescent assembly 600, and second fluorescent assembly 700 in the laser light source 000 is relatively compact, resulting in a smaller width of the laser light source 000 in the X-axis direction and a smaller width in the Y-axis direction. This allows the entire laser light source 000 to be compact. In addition, the laser light source 000 in the embodiment of the present application does not need to be provided with a relay loop mirror group in the optical path, so that the volume of the entire laser light source 000 is further reduced.

[0046] For example, the laser in laser light source 000 can emit a laser beam. The laser beam is first split by beam splitter 200. Then, beam splitter 200 transmits the first laser beam in the laser beam toward reflector 300 and reflects the second laser beam toward light guide assembly 400. Reflector 300 then reflects the first laser beam toward light combiner assembly 500. Light guide assembly 400 transmits a portion of the second laser beam toward first fluorescent assembly 600. Excited by the portion of the second laser beam, first fluorescent assembly 600 generates a first fluorescent light. First fluorescent assembly 600 reflects the first fluorescent light toward light guide assembly 400, which in turn reflects the first fluorescent light toward light combiner assembly 500. Light guide assembly 400 also reflects another portion of the second laser beam toward second fluorescent assembly 700. Excited by the other portion of the second laser beam, second fluorescent assembly 700 generates a second fluorescent light. Second fluorescent assembly 700 reflects the second fluorescent light toward light guide assembly 400, which transmits the second fluorescent light toward light combiner assembly 500. Finally, the first laser, the first fluorescent light, and the second fluorescent light are combined at the light combining lens assembly 500, which then emits the combined laser beam. For example, the beam splitter assembly 200 in the laser light source 000 can be a transflective mirror. The transmittance and reflectance of the transflective mirror can be modified by designing the film layer on the transflective mirror in practical applications.

[0047] Optional, such as Figure 2 As shown, the angle α1 between the mirror surface of the beam splitter component 200 in the laser light source 000 and the direction in which the laser beam emitted by the laser 100 is incident on the beam splitter component 200 can be 45 degrees; the angle α2 between the mirror surface of the reflector 300 and the direction in which the first laser is incident on the reflector 300 can be 45 degrees, and the mirror surfaces of the beam splitter component 200 and the reflector 300 are parallel; the angle α3 between the mirror surface of the light guide mirror group 400 and the direction in which the first fluorescence is incident on the light guide mirror group 400 can be 45 degrees; the angle α4 between the mirror surface of the light combining mirror group 500 and the direction in which the first fluorescence is incident on the light combining mirror group 500 can be 45 degrees.

[0048] For the second optional implementation, please refer to Figure 3 , Figure 3: This is a schematic diagram of the arrangement of various optical components in another laser light source provided by an embodiment of the present application. When the light guide mirror group 400 and the light combining mirror group 500 in the laser light source 000 each include two dichroic mirrors, the light guide mirror group 400 may include: a first dichroic mirror 401 and a second dichroic mirror 402, and the light combining mirror group 500 may include: a third dichroic mirror 501 and a fourth dichroic mirror 502. Among them, the light splitting component 200 and the reflector 300 in the laser light source 000 can be arranged sequentially along the target direction (i.e., the Y-axis direction in the figure). The first fluorescent component 600, the first dichroic mirror 401, and the third dichroic mirror 501 can be arranged sequentially parallel to the target direction. The second fluorescent component 700, the second dichroic mirror 402, and the fourth dichroic mirror 502 can be arranged sequentially parallel to the target direction. The light-splitting assembly 200, the first dichroic mirror 401, and the second dichroic mirror 402 can be arranged sequentially in a direction perpendicular to the target direction, while the reflector 300, the third dichroic mirror 501, and the fourth dichroic mirror 502 can be arranged sequentially in a direction perpendicular to the target direction. That is, the first fluorescent assembly 600, the first dichroic mirror 401, and the third dichroic mirror 501 can be arranged in the Y-axis direction in the figure. The second fluorescent assembly 700, the second dichroic mirror 402, and the fourth dichroic mirror 502 can be arranged in the Y-axis direction in the figure. The light-splitting assembly 200, the first dichroic mirror 401, and the second dichroic mirror 402 can be arranged in the X-axis direction in the figure, while the reflector 300, the third dichroic mirror 501, and the fourth dichroic mirror 502 can be arranged in the X-axis direction in the figure.

[0049] 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 directs the first laser beam in the laser beam to the reflector 300 and the second laser beam to the first dichroic mirror 401. The reflector 300 then reflects the first laser beam toward the third dichroic mirror 501. The first dichroic mirror 401 reflects a portion of the second laser beam toward the first fluorescent component 600, thereby stimulating the first fluorescent component 600 to produce a first fluorescent light. The first fluorescent component 600 reflects the first fluorescent light toward the first dichroic mirror 401, which transmits the first fluorescent light toward the third dichroic mirror 501. The third dichroic mirror 501 transmits the first laser beam toward the fourth dichroic mirror 502 and reflects the first fluorescent light toward the fourth dichroic mirror 502. In addition, the first dichroic mirror 401 transmits another part of the second laser light to the second dichroic mirror 402, and the second dichroic mirror 402 reflects another part of the second laser light to the second fluorescent component 700, and excites the second fluorescent component 700 to generate a second fluorescence. The second fluorescent component 700 reflects the second fluorescence to the second dichroic mirror 402, and the second dichroic mirror 402 transmits the second fluorescence to the fourth dichroic mirror 502. Finally, the first laser light, the first fluorescence, and the second fluorescence are combined at the light combining mirror group 500. For example, the light splitting component in the laser light source 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. Figure 3 As shown, the fourth dichroic mirror 502 in the light-combining mirror assembly 500 can be a dichroic mirror that transmits the first laser light and the first fluorescent light, and reflects the second fluorescent light. In other possible implementations, the fourth dichroic mirror 502 can also be a dichroic mirror that reflects the first laser light and the first fluorescent light, and transmits the second fluorescent light, which is not limited in this embodiment of the present application.

[0050] Optional, such as Figure 3As shown, the angle α5 between the mirror surface of the beam splitter component 200 in the laser light source 000 and the direction in which the laser beam emitted by the laser 100 is incident on the beam splitter component 200 can be 45 degrees; the angle α6 between the mirror surface of the reflector 300 and the direction in which the first laser is incident on the reflector 300 can be 45 degrees, and the mirror surfaces of the beam splitter component 200 and the reflector 300 are parallel; the angle α7 between the mirror surface of the first dichroic mirror 401 in the light guide mirror assembly 400 and the direction in which the first fluorescent light is incident on the first dichroic mirror 401 can be 45 degrees. can be 45 degrees; the angle α8 between the mirror surface of the second dichroic mirror 402 in the light guiding mirror group 400 and the direction of the second fluorescence incident on the second dichroic mirror 402 can be 45 degrees; the angle α9 between the mirror surface of the third dichroic mirror 501 in the light combining mirror group 500 and the direction of the first fluorescence incident on the third dichroic mirror 501 can be 45 degrees; the angle α10 between the mirror surface of the fourth dichroic mirror 502 in the light combining mirror group 500 and the direction of the second fluorescence incident on the fourth dichroic mirror 502 can be 45 degrees.

[0051] It should be noted that, in the second optional implementation, there are many possible arrangements of the laser 100 and other optical devices in the laser light source 0000. The following embodiments of the present application will be schematically described using the following two possible arrangements:

[0052] The first possible situation is Figure 3 As shown, the laser 100, the beam splitter 200, and the reflector 300 in the laser light source 000 can be arranged sequentially along the target direction. The beam splitter 200 can be used to transmit the first laser light in the laser beam to the reflector 300 and reflect the second laser light in the laser beam to the light guide mirror assembly 400.

[0053] For the second possible situation, please refer to Figure 4 , Figure 4 This is a schematic diagram illustrating the arrangement of the various optical components in another laser light source provided in an embodiment of the present application. The laser 100, beam splitter assembly 200, and light guide assembly 400 in the laser light source 000 can be arranged sequentially in a direction perpendicular to the target, i.e., the arrangement direction of the laser 100, beam splitter assembly 200, and light guide assembly 400 is along the X-axis in the figure. The beam splitter assembly 200 can be used to reflect the first laser beam in the laser beam toward the reflector 300 and transmit the second laser beam in the laser beam toward the light guide assembly 400.

[0054] It should be noted that in the first possible case and the second possible case mentioned above, the way in which the laser beam emitted by the laser 100 is transmitted in the subsequent optical path after being split by the splitting component 200 can refer to the description in the second optional implementation method mentioned above, and will not be repeated here.

[0055] In the examples of this application, please refer to Figure 5 , Figure 5 This is a schematic diagram of the structure of another laser light source provided in an embodiment of the present application. When the laser 100, beam splitter 200, and reflector 300 in laser light source 000 are arranged sequentially along a target direction, and the arrangement direction of the laser 100, first fluorescent assembly 600, and second fluorescent assembly 700 is perpendicular to the target direction, laser light source 000 may further include a heat sink 800. The heat sink 800 may be in contact with the laser 100, first fluorescent assembly 600, and second fluorescent assembly 700 simultaneously. In this case, the laser 100 generates a certain amount of heat during the process of emitting the laser beam. Furthermore, when a portion of the second laser light strikes the first fluorescent assembly 600 to excite the first fluorescent light, and when another portion of the second laser light strikes the second fluorescent assembly 700 to excite the second fluorescent light, some of the light energy is converted into heat energy. Therefore, to ensure the proper operation of the laser 100, first fluorescent assembly 600, and second fluorescent assembly 700, a heat sink is required to dissipate heat from the laser 100, first fluorescent assembly 600, and second fluorescent assembly 700. In the present application, by arranging the laser 100, first fluorescent assembly 600, and second fluorescent assembly 700 in the laser light source 000 perpendicular to the target direction, the laser 100, first fluorescent assembly 600, and second fluorescent assembly 700 can share a heat sink 800 in the laser light source 000. This allows heat generated by the laser 100, first fluorescent assembly 600, and second fluorescent assembly 700 during operation to be dissipated. This eliminates the need to provide separate heat sinks for the laser 100, first fluorescent assembly 600, and second fluorescent assembly 700, effectively reducing the overall volume of the laser light source 000.

[0056] Optionally, since the second laser light in the laser beam emitted by the laser 100 is used to irradiate the first fluorescent component 600 and the second fluorescent component 700 respectively to excite the first fluorescent light and the second fluorescent light, the first laser light is used to combine with the first fluorescent light and the second fluorescent light at the light combining lens assembly 500 to form white light. In addition, in the process of irradiating the first fluorescent component 600 and the second fluorescent component 700 respectively to excite fluorescence, a portion of the light energy of the second laser light is converted into heat energy, and the impact of the first laser light (i.e., blue light) on the synthesized white light is relatively small. Therefore, the proportion of the first laser light in the laser beam emitted by the laser 100 can be smaller than the proportion of the second laser light in the laser beam.

[0057] In an embodiment of the present application, the ratio of the proportion of the first laser in the laser beam to the proportion of the second laser in the laser beam can be 1 to 9. 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 reflector 300 to the light combining lens group 500, and 90% of the second laser is used to excite the first fluorescent component 600 and the second fluorescent component 700 respectively to generate the first fluorescent light and the second fluorescent light, which are combined with the first laser. It should be noted that the proportion of the first laser and the second laser in the laser beam can also be appropriately adjusted according to the color temperature of the laser beam, 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.

[0058] In the embodiment of the present application, the first fluorescent assembly 600 in the laser light source 000 may include a first reflective portion 601 and a first fluorescent portion 602 located on the side of the first reflective portion 601 near the light guide assembly 400. The second fluorescent assembly 700 may include a second reflective portion 701 and a second fluorescent portion 702 located on the side of the second reflective portion 701 near the light guide assembly 400. Thus, when a portion of the second laser light in the laser beam strikes the first fluorescent portion 602 in the first fluorescent assembly 600, the laser beam excites the fluorescent material on the first fluorescent portion 602. The fluorescent material, under the excitation of the laser beam, produces a first fluorescent light, which is then reflected by the first reflective portion 602. When another portion of the second laser light in the laser beam strikes the second fluorescent portion 702 in the second fluorescent assembly 700, the laser beam excites the fluorescent material on the second fluorescent portion 702. The fluorescent material, under the excitation of the laser beam, produces a second fluorescent light, which is then reflected by the second reflective portion 702.

[0059] In the present application, both the first fluorescent component 600 and the second fluorescent component 700 can be fixed fluorescent components, for example, fixed fluorescent plates. Fixed fluorescent components (i.e., the first fluorescent component and the second fluorescent component) do not require a driving component, which is beneficial for reducing the space occupied by the fluorescent components in the laser light source 000 and is beneficial for the miniaturization design of the laser light source 000. In addition, in some special optical systems, non-fixed fluorescent components alternately generate fluorescence under the drive of a driving component. However, the driving component may vibrate when driving the fluorescent component to rotate, which may affect the reliability of the system. Compared with non-fixed fluorescent components, fixed fluorescent components can effectively avoid the undesirable phenomenon of vibration of the fluorescent components.

[0060] Alternatively, the fluorescent material of the first fluorescent portion 602 in the first fluorescent assembly 600 and the second fluorescent portion 702 in the second fluorescent assembly 700 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 a continuous ceramic as a medium and phosphor particles distributed within the ceramic. It should be noted that the embodiments of the present application do not impose any specific limitations on the fluorescent material.

[0061] Optionally, the laser 100 in the laser light source 000 can be a laser for emitting blue laser light, and both the first laser and the second laser light are blue laser light. One of the first fluorescent light produced by the first fluorescent component 600, which is excited by a portion of the second laser light, and the second fluorescent light produced by the second fluorescent component 700, which is excited by another portion of the second laser light, can be green fluorescent light, and the other can be red fluorescent light. For example, the first fluorescent light can be red fluorescent light, and the second fluorescent light can be green fluorescent light; alternatively, the first fluorescent light can be green fluorescent light, and the second fluorescent light can be red fluorescent light, which is not specifically limited in the embodiments of the present application. It should be noted that the following embodiments of the present application are schematically illustrated with the first fluorescent light being green fluorescent light and the second fluorescent light being red fluorescent light. Thus, by irradiating the first fluorescent component 600 with a blue laser light, the green fluorescent powder on the first fluorescent component 600 is excited to produce green fluorescent light. By irradiating the second fluorescent component 700 with a blue laser light, the red fluorescent powder on the second fluorescent component 700 is excited to produce red fluorescent light.

[0062] In an embodiment of the present application, when the first fluorescent light is green and the second fluorescent light is red, the ratio of the proportion of the second laser light directed toward the first fluorescent component 600 to the proportion of the second laser light directed toward the second fluorescent component 700 can be 6 to 4. For example, the proportion of the first laser light in the laser beam can be c%, and the proportion of the second laser light in the laser beam can be d%. For example, if c = 60% and d = 40, 60% of the second laser light is used to excite the first fluorescent component 600 to produce the first fluorescent light, and 40% of the second laser light is used to excite the second fluorescent component 700 to produce the second fluorescent light. To facilitate light collection by the subsequent optical system, the optical etendue of the fluorescent light excited by the fluorescent components must be small. However, to maintain a small optical etendue, the spot size of the second laser light incident on the fluorescent components must be small. This results in a higher optical power density of the second laser light incident on the fluorescent components. The red phosphor on the first fluorescent component 600 and the green phosphor on the second fluorescent component 700 have a lower ability to withstand high optical power density lasers. To this end, in the present application, the proportion of the second laser directed toward the second fluorescent assembly 700 is smaller than the proportion of the second laser directed toward the first fluorescent assembly 600. It should be noted that, in actual needs, the proportion of the second laser directed toward the second fluorescent assembly 700 may also be greater than the proportion of the second laser directed toward the first fluorescent assembly 600, and this embodiment of the present application is not limited to this.

[0063] In summary, the embodiments of the present application provide a laser light source, which may include: a laser, a beam splitter, a reflector, a light guide lens group, a light combiner lens group, a first fluorescent component, and a second 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 beam splitter, the reflector, the light guide lens group, the light combiner lens group, the first fluorescent component, and the second fluorescent component, it can generate white light. Therefore, the number of optical devices included 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.

[0064] The present application also provides a lighting device, please refer to Figure 6 , Figure 6This 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.

[0065] 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.

[0066] 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.

[0067] 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, beam splitter, reflector, light guide lens assembly, light combining lens assembly, first fluorescent assembly and second fluorescent assembly; The laser is used to emit a laser beam to the light splitting component; The beam splitter assembly is used to direct the first laser light in the laser beam to the reflector, and to direct the second laser light in the laser beam to the light guide mirror assembly; The reflecting mirror is used to guide the first laser to the light combining mirror group; The light guide mirror assembly is used to guide a portion of the second laser light to the first fluorescent component, and to guide another portion of the second laser light to the second fluorescent component; The first fluorescent component is used to reflect the first fluorescent light toward the light guide mirror assembly under the excitation of a portion of the second laser light; The second fluorescent component is used to reflect second fluorescent light toward the light guide mirror assembly under the excitation of another part of the second laser; The light guide mirror group is further used to guide the first fluorescence and the second fluorescence to the light combining mirror group; The light combining mirror assembly is used to combine the first laser, the first fluorescence and the second fluorescence.

2. The laser light source according to claim 1, wherein: When the light guide mirror group and the light combining mirror group both include a dichroic mirror, the laser, the beam splitter assembly, and the reflector are sequentially arranged along a target direction, the beam splitter assembly, the light guide mirror group, and the first fluorescent assembly are sequentially arranged perpendicular to the target direction, the light combining mirror group and the reflector are arranged perpendicular to the target direction, and the second fluorescent assembly, the light guide mirror group, and the light combining mirror group are sequentially arranged parallel to the target direction; Among them, the light splitting component is used to transmit the first laser toward the reflector and reflect the second laser toward the light guide mirror group; the light guide mirror group is used to transmit a part of the second laser toward the first fluorescent component and reflect the first fluorescence toward the light combining mirror group; the light guide mirror group is also used to reflect another part of the second laser toward the second fluorescent component and transmit the second fluorescence toward the light combining mirror group.

3. The laser light source according to claim 1, wherein: The light guide mirror group includes: a first dichroic mirror and a second dichroic mirror, and the light combining mirror group includes: a third dichroic mirror and a fourth dichroic mirror; The beam splitter component and the reflector are arranged sequentially along the target direction, the first fluorescent component, the first dichroic mirror and the third dichroic mirror are arranged sequentially parallel to the target direction, the second fluorescent component, the second dichroic mirror and the fourth dichroic mirror are arranged sequentially parallel to the target direction, the beam splitter component, the first dichroic mirror and the second dichroic mirror are arranged sequentially perpendicular to the target direction, and the reflector, the third dichroic mirror and the fourth dichroic mirror are arranged sequentially perpendicular to the target direction.

4. The laser light source according to claim 3, characterized in that The laser, the beam splitter assembly and the reflector are arranged in sequence along the target direction, and the beam splitter assembly is used to transmit the first laser to the reflector and reflect the second laser to the light guide mirror assembly; Alternatively, the laser, the beam splitter assembly, and the light guide mirror assembly are sequentially arranged in a direction perpendicular to the target direction, and the beam splitter assembly is used to reflect the first laser toward the reflector and transmit the second laser toward the light guide mirror assembly.

5. The laser light source according to claim 4, characterized in that: When the laser, the spectroscopic component and the reflector are arranged sequentially along the target direction, the arrangement direction of the laser, the first fluorescent component and the second fluorescent component is perpendicular to the target direction, and the laser light source further includes: a heat dissipation component, which is in contact with the laser, the first fluorescent component and the second fluorescent component at the same time.

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 claim 6, characterized in that The ratio of the first laser beam's proportion in the laser beam to the second laser beam's proportion in the laser beam is 1:

9.

8. 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, one of the first fluorescent light and the second fluorescent light is green fluorescent light, and the other is red fluorescent light.

9. The laser light source according to claim 8, characterized in that When the first fluorescence is green fluorescence and the second fluorescence is red fluorescence, the ratio of the proportion of the laser light directed toward the first fluorescent component to the proportion of the laser light directed toward the second fluorescent component in the second laser light is 6:

4.

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.

Images