CN115268191A

CN115268191A - Laser light source and lighting device

Info

Publication number: CN115268191A
Application number: CN202211042615.1A
Authority: CN
Inventors: 李巍; 田有良; 顾晓强
Original assignee: Qingdao Hisense Laser Display Co Ltd
Current assignee: Qingdao Hisense Laser Display Co Ltd
Priority date: 2022-08-29
Filing date: 2022-08-29
Publication date: 2022-11-01

Abstract

The application discloses laser light source and lighting device belongs to the projection display field. The laser light source includes: the laser device, the spectroscope group, first fluorescence subassembly, second fluorescence subassembly and light-emitting port. Because the laser beam emitted by a single laser in the laser source only needs to be matched with the beam splitter group, the first fluorescent component and the second fluorescent component, the other part of the first fluorescent light, the second fluorescent light and the second laser can be white light after light combination at the light outlet. Therefore, the number of optical devices included in the laser light source is reduced, and the volume of the whole laser light source is reduced. Therefore, the overall size of the lighting device integrated with the laser light source is smaller. In addition, the first fluorescence generated by exciting the first fluorescence component by the first laser is directly reflected to the subsequent light path through the spectroscope group without passing through the spectroscope group, so that the light energy loss of the first fluorescence is effectively avoided, and the good brightness of the laser beam after light combination is ensured.

Description

Laser light source and lighting device

Technical Field

The application relates to the field of projection display, in particular to a laser light source and a lighting device.

Background

With the development of the optoelectronic technology, the color rendering of the light emitted by the lighting device is more and more required. High color rendering illumination devices are commonly used in medical lighting and projection displays.

Currently, lighting devices generally comprise: laser light sources and other optical components. The laser light source generally includes: the device comprises a laser, a diffusion sheet, a dichroic mirror, a collimating lens group, a fluorescent color wheel and a relay loop lens group. The fluorescent color wheel has a laser transmission area and an excitation area coated with fluorescent powder. The relay loop lens group includes: the optical path turning system consists of a plurality of lenses and a plurality of reflectors. Laser beams emitted by the laser are diffused by the diffusion sheet, penetrate through the dichroic mirror, are collimated by the collimating lens group and are guided to the fluorescent color wheel. When the laser beam irradiates the laser transmission area on the fluorescent color wheel, the laser beam penetrates through the laser transmission area, is bent by the relay circuit mirror group and is emitted out through the dichroic mirror. When the laser beam irradiates the excitation area coated with the fluorescent powder, the laser beam excites the fluorescent powder to emit fluorescent light, and the fluorescent light is reflected and then is guided to the dichroic mirror through the collimating mirror group. The laser beam reflected by the dichroic mirror is combined with the laser beam transmitted through the dichroic mirror and guided to other optical components (e.g., a dodging component) at the rear end.

However, the existing laser light source includes many optical devices, which results in a large volume of the whole laser light source, and further results in a large volume of the whole illumination device.

Disclosure of Invention

The embodiment of the application provides a laser light source and a lighting device. The problem that the whole volume of a laser light source in the prior art is large can be solved, the technical scheme is as follows:

in one aspect, a laser light source is provided, the laser light source comprising:

the device comprises a laser, a beam splitter group, a first fluorescent component, a second fluorescent component and a light outlet;

the spectroscope group includes: the first partition and the second partition are adjacently arranged;

the laser beam emitted by the laser comprises: the first laser penetrates through the first partition and is emitted to the first fluorescent component, and the second laser is reflected to the second fluorescent component by the second partition;

the first fluorescence component generates first fluorescence under the excitation action of the first laser and reflects the first fluorescence to the spectroscope group, and the spectroscope group reflects the first fluorescence to the light outlet;

the second fluorescence component generates second fluorescence under the excitation action of part of the second laser, reflects the second fluorescence and the other part of the second laser to the spectroscope group, and synchronously emits the second fluorescence and the first fluorescence to the light outlet through the spectroscope group.

In another aspect, there is provided a lighting device including:

the device comprises a laser light source and a light homogenizing assembly, wherein the laser light source is any one of the laser light sources.

The beneficial effects brought by the technical scheme provided by the embodiment of the application at least comprise:

a laser light source may include: the device comprises a laser, a beam splitter group, a first fluorescent component, a second fluorescent component and a light outlet. Because the laser beam emitted by a single laser in the laser source only needs to be matched with the beam splitter group, the first fluorescent component and the second fluorescent component, the other part of the first fluorescent light, the second fluorescent light and the second laser can be combined to form white light at the light outlet. Therefore, the number of optical devices included in the laser light source is reduced, and the volume of the whole laser light source is reduced. Therefore, the overall volume of the lighting device integrated with the laser light source is small. In addition, the first fluorescence generated by exciting the first fluorescence component by the first laser is directly reflected to the subsequent light path through the spectroscope group without passing through the spectroscope group, so that the light energy loss of the first fluorescence is effectively avoided, and the good brightness of the laser beam after light combination is ensured.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a laser light source provided in an embodiment of the present application;

FIG. 2 is a schematic diagram illustrating an arrangement of optical components in a laser light source according to an embodiment of the present disclosure;

fig. 3 is a schematic structural diagram of another laser light source provided in an embodiment of the present application;

FIG. 4 is a schematic structural diagram of another laser light source provided in the embodiments of the present application;

fig. 5 is a schematic structural diagram of a laser provided in an embodiment of the present application;

fig. 6 is a schematic structural diagram of another laser light source provided in this embodiment of the present application;

FIG. 7 is a schematic diagram showing the spectral distributions of red fluorescence and green fluorescence before they are filtered by a dichroic mirror;

FIG. 8 is a schematic diagram showing the spectral distributions of red fluorescence and green fluorescence after being filtered by a dichroic mirror;

fig. 9 is a block diagram of a lighting device according to an embodiment of the present application.

With the above figures, there are shown specific embodiments of the present application, which will be described in more detail below. These drawings and written description are not intended to limit the scope of the inventive concepts in any manner, but rather to illustrate the inventive concepts to those skilled in the art by reference to specific embodiments.

Detailed Description

To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a laser light source according to an embodiment of the present disclosure. The laser light source 000 may include: the laser 100, the beam splitter set 200, the first fluorescent assembly 300, the second fluorescent assembly 400 and the light outlet C.

The spectroscope group 200 in the laser light source 000 may include: a first partition 201 and a second partition 202 disposed adjacently.

The laser beam emitted from the laser 100 in the laser light source 000 may include: the first laser beam passing through the first partition 201 of the beam splitter set 200 and emitted to the first fluorescent device 300 of the laser source 000, and the second laser beam reflected by the second partition 202 of the beam splitter set 200 and emitted to the second fluorescent device 400 of the laser source 000.

The first fluorescent component 300 in the laser source 000 can generate first fluorescent light under the excitation of the first laser, and the first fluorescent component 300 can reflect the first fluorescent light to the spectroscope group 200. The beam splitter set 200 can reflect the first fluorescence to the light exit C of the laser source 000.

The second fluorescent assembly 400 in the laser light source 000 can generate second fluorescent light under the excitation of a part of the second laser light, and the second fluorescent assembly 400 can reflect the other part of the second fluorescent light and the second laser light to the beam splitter group 200. The other part of the second fluorescence and the second laser can transmit through the spectroscope group 200 and be emitted to the light outlet C in synchronization with the first fluorescence.

In the embodiment of the present application, the laser 100 in the laser light source 000 may be configured to emit blue laser light to the beam splitter group 200, and the wavelength of the blue laser light may be 445 nm to 470 nm. Thus, when the fluorescent components (i.e., the first fluorescent component and the second fluorescent component) are excited by the blue light with the short wavelength, the fluorescent components can absorb photons with the short wavelength and excite the fluorescent light with the longer wavelength, the blue light and the first fluorescent light and the second fluorescent light (for example, one of the first fluorescent light and the second fluorescent light is red fluorescent light, and the other one is green fluorescent light) synchronously emit to the light outlet C and combine to form white light, and the color rendering property of the white light formed after the light combination is good. In addition, the first fluorescent member 300 is excited by a laser beam emitted from a part of the laser units in the single laser 100, and the second fluorescent member 400 is excited by a laser beam emitted from another part of the laser units. Thus, the energy utilization rate of a single laser 100 is effectively improved while three-color laser light (blue laser light, red laser light and green laser light) combination is realized. Illustratively, the laser 100 may be an MCL laser. It should be noted that in other possible implementations, the laser 100 may also employ other types of lasers. For example, a Laser Diode (LD) Laser emits Laser light having good directivity and controllability, and emits a Laser beam having a small etendue. Thus, the etendue of the laser beam emitted from the LD laser is small. Therefore, the subsequent optical system can receive light conveniently, and the utilization efficiency of light energy is effectively improved. Alternatively, the laser 100 may also be a Light Emitting Diode (LED) laser, which is not specifically limited in this embodiment.

In addition, the first laser light and the second laser light in the laser beam emitted by the laser 100 may be laser light of the same color, for example, both blue laser light. The first laser is used for irradiating the first fluorescent assembly 300 to excite and generate first fluorescent light, and a part of the second laser is used for irradiating the second fluorescent assembly 400 to excite and generate second fluorescent light. In the process of generating fluorescence by the second fluorescence assembly 400 with respect to the excitation of the second laser light irradiated thereto, there is a phenomenon that the excitation of the second laser light is incomplete. Therefore, a part of the second laser light is excited by the second fluorescent member 400 to generate second fluorescent light, and another part of the second laser light is diffusely reflected by the second fluorescent member 400 to be used for combining light. And in the process that one part of the second laser excites the fluorescent powder arranged on the second fluorescent component to generate second fluorescence, and the other part of the second laser is reflected by the second fluorescent component. Due to the fact that the thickness of the fluorescent powder arranged on the second fluorescent component is constant. Therefore, the stability of the proportion of the other part of the laser in the second laser after the diffuse reflection of the second fluorescent component can be ensured, and the higher brightness of the light beam formed by the combination of the other part of the laser in the second laser and the first fluorescent light and the second fluorescent light can be further ensured, and the numerical value of the brightness is more stable.

In the present application, the laser 100 in the laser light source 000 may emit a laser beam, and the laser beam is first split by the beam splitter group 200; then, the first partition in the beam splitter group 200 guides the first laser in the laser beam to the first fluorescent assembly 300, and the second partition in the beam splitter group 200 guides the second laser in the laser beam to the second fluorescent assembly 400; then, the first fluorescent component 300 generates first fluorescent light under the excitation of the first laser, the first fluorescent light is reflected to the spectroscope group 200 through the first fluorescent component 300, and the second fluorescent component 400 generates second fluorescent light under the excitation of a part of the second laser, and the second fluorescent light and another part of the second laser are reflected to the spectroscope group 200 through the second fluorescent component 400 and transmitted by the spectroscope group 200. And finally, combining the other part of the first fluorescence, the second fluorescence and the second laser at the light outlet. In this case, since the laser beam emitted from the single laser 100 in the laser light source 000 only needs to pass through the beam splitter set 200, the first fluorescent member 300 and the second fluorescent member 400, white light can be generated. Therefore, the number of optical devices included in the laser light source 000 is reduced, and the volume of the entire laser light source 000 is reduced. Thus, the overall volume of the lighting device into which the laser light source 000 is integrated is made small. In addition, the first fluorescence generated by the first fluorescence component 300 excited by the first laser is directly reflected to the subsequent light path through the beam splitter group 200 without passing through the beam splitter group 200, thereby effectively avoiding the light energy loss of the first fluorescence and ensuring the better brightness of the laser beam after light combination.

In summary, the embodiment of the present application provides a laser light source, which may include: the device comprises a laser, a beam splitter group, a first fluorescent component, a second fluorescent component and a light outlet. Because the laser beam emitted by a single laser in the laser source only needs to be matched with the beam splitter group, the first fluorescent component and the second fluorescent component, the other part of the first fluorescent light, the second fluorescent light and the second laser can generate white light after light combination at the light outlet. Therefore, the number of optical devices included in the laser light source is reduced, and the volume of the whole laser light source is reduced. Therefore, the overall size of the lighting device integrated with the laser light source is smaller. In addition, the first fluorescence generated by the first fluorescence component excited by the first laser is directly reflected to the subsequent light path through the spectroscope group without penetrating through the spectroscope group, so that the light energy loss of the first fluorescence is effectively avoided, and the good brightness of the laser beam after light combination is ensured.

Referring to fig. 2, fig. 2 is a schematic diagram illustrating an arrangement of optical components in a laser light source according to an embodiment of the present disclosure. The laser 100, the spectroscope group 200 and the first fluorescence assembly 300 in the laser light source 000 may be arranged in order along a target direction (the target direction may be the Y-axis direction in the figure). The spectroscope group 200 and the second fluorescence assembly 400 may be sequentially arranged in a direction perpendicular to the target direction. For example, the second sub-area 202 in the optical splitter group 200 may be sequentially arranged with the second fluorescent assembly 400 in the laser light source 000 along a direction perpendicular to the target direction, that is, the second sub-area 202 may be sequentially arranged with the second fluorescent assembly 400 in the laser light source 000 along the X-axis direction in the figure. In this case, by arranging the laser 100, the spectroscope assembly 200 and the first fluorescence assembly 300 in the target direction, the spectroscope assembly 200 and the second fluorescence assembly 400 are sequentially arranged in a direction perpendicular to the target direction. Thus, the arrangement of each optical component in the laser light source 000 is compact, and the overall volume of the laser light source 000 is small. In addition, the first laser only needs to pass through the first partition 201 in the primary beam splitter group 200, so that the loss of the first laser in the transmission process of the whole optical system is small, and the efficiency of exciting the first fluorescent component 300 by the first laser is high. In addition, the other part of the second fluorescence and the second laser only needs to pass through the primary beam splitter group 200, so that the loss of the other part of the second fluorescence and the second laser in the whole optical system transmission process is ensured to be small. In addition, the laser light source 000 in the embodiment of the present application does not need to arrange a relay loop mirror group in the light path, so that the volume of the whole laser light source 000 is further reduced. In this application, an included angle α between the mirror surface of the first partition 201 and the mirror surface of the second partition 202 in the optical splitter group 200 and the direction in which the laser beam emitted by the laser 100 enters the optical splitter group 200 may be 45 degrees, or may be other angles, which is not specifically limited in this embodiment of the application.

In the embodiment of the present application, please refer to fig. 3, and fig. 3 is a schematic structural diagram of another laser light source provided in the embodiment of the present application. The first partition 201 in the spectroscope group 200 may include a first dichroic mirror 201a, and the second partition 202 may include: a polarization selector 202a, the polarization selector 202a being operable to reflect laser light of one polarization state and transmit laser light of another polarization state. In this case, by disposing the polarization selector 202a at the second division in the optical splitter group 200, the polarization selector 202a occupies only a part of the optical splitter group 200. When a portion of the second laser excites the second fluorescent member 400 to generate second fluorescent light, the second fluorescent light is reflected by the second fluorescent member 400, so that the second fluorescent light is not completely transmitted by the polarization selector 202a and then is guided to the light outlet C. Thus, the light loss of the second fluorescence generated by the excitation of the second fluorescence component 400 when the second fluorescence penetrates through the beam splitter set 200 is less, and the good brightness of the laser after the subsequent light combination is ensured. For example, a first laser in the laser beam emitted by the laser 100 may be transmitted to the first fluorescent component 300 through the first dichroic mirror 201a, and excite the first fluorescent component 300 to generate a first fluorescent light, the first fluorescent component 300 reflects the first fluorescent light to the first dichroic mirror 201a, and the first dichroic mirror 201a directly reflects the first fluorescent light to the light outlet C. And the second laser light in the laser light beam may be reflected to the second fluorescent component 400 through the polarization selector 202a, a portion of the second laser light excites the second fluorescent component 400 to generate second fluorescent light, the first dichroic mirror 201a and the polarization selector 202a transmit the second fluorescent light, and another portion of the second laser light is transmitted through the first dichroic mirror 201 a. For example, the first dichroic mirror 201a may be a dichroic mirror that transmits the first laser light, the second laser light, and the second fluorescent light and reflects the first fluorescent light, or may also be a dichroic mirror that transmits the first laser light, the second laser light, and the first fluorescent light and reflects the second fluorescent light, which is not specifically limited in this embodiment. There are many alternative implementations for the polarization selector 202a, and the polarization selector 202a may be a polarizer. In this application, the polarizer may reflect the second laser light directed to its surface toward the second fluorescent member 400 (i.e., the polarizer may reflect the laser light of one polarization state and transmit the laser light of another polarization state). Alternatively, the polarization selector 202a may be a controllable liquid crystal panel, and the controllable liquid crystal panel controls the liquid crystal deflection therein under the action of the electric field, so that the controllable liquid crystal panel modulates the laser incident on the controllable panel and outputs the modulated laser. In this application, the controllable liquid crystal panel may reflect the second laser light toward the second fluorescent member 400 and transmit the second fluorescent light toward the light outlet.

Optionally, as shown in fig. 3, the second partition 202 in the optical splitter group 200 may further include: the second dichroic mirror 202b provided in a stack with the polarization selector 202a, the polarization selector 202a is closer to the laser with respect to the second dichroic mirror 202 b. In this application, the first dichroic mirror 201a and the second dichroic mirror 202b in the spectroscope group 200 may be different portions within the same dichroic mirror a, respectively. For example, the first laser light in the laser beam emitted by the laser 100 may be transmitted to the first fluorescent component 300 through a portion of the dichroic mirror a, and excite the first fluorescent component 300 to generate the first fluorescent light, the first fluorescent component 300 reflects the first fluorescent light to the dichroic mirror a, and the dichroic mirror a directly reflects the first fluorescent light to the light outlet C. And the second laser light in the laser light beam may be reflected to the second fluorescent component 400 through the polarization selector 202a, a part of the second laser light excites the second fluorescent component 400 to generate second fluorescent light, the dichroic mirror a and the polarization selector 202a transmit the second fluorescent light, and another part of the second laser light transmits through the dichroic mirror a. The second dichroic mirror 202b may be a dichroic mirror that transmits the first laser light, the second laser light, and the second fluorescent light and reflects the first fluorescent light, or may be a dichroic mirror that transmits the first laser light, the second laser light, and the first fluorescent light and reflects the second fluorescent light.

Optionally, when the polarization selector 202a is disposed on a partial area of the dichroic mirror a, in order to meet requirements for different color rendering properties, that is, in order to change different proportions of three color lights in a combined light beam, please refer to fig. 4, where fig. 4 is a schematic structural diagram of another laser light source provided in an embodiment of the present application. The laser light source 000 may further include: a drive assembly 500, the drive assembly 500 being connectable to the polarization selector 202 a. Wherein the drive assembly 500 may be configured to: driving polarization selector 202a to move over dichroic mirror a. For example, when the polarization selector 202a is a polarizer, a certain gap may exist between the polarizer and the dichroic mirror a, and the driving assembly 500 may drive the polarizer to move on the dichroic mirror a, so as to change the proportion of the second laser in the laser beams emitted by the laser 100 and reflected by the polarizer toward the second fluorescent assembly 400 and the proportion of the first laser in the laser beams transmitted by the dichroic mirror a, so as to adjust the proportion of the first laser and the second laser for light combination, thereby adjusting the color rendering of the laser beams. If the polarization selector 202a is a controllable liquid crystal panel, the controllable liquid crystal panel may be disposed on a partial region (i.e., the second partition) of the dichroic mirror a, so that the second laser light is reflected toward the second fluorescent member 400 through the controllable liquid crystal panel, and the first laser light is transmitted toward the first fluorescent member 300 through the dichroic mirror a.

It should be noted that, in other possible implementation manners, a controllable liquid crystal panel may also be disposed in the whole area corresponding to the dichroic mirror a, and the controllable liquid crystal panel forms a reflection area and a transmission area under the action of an electric field, so that the second laser light in the laser beam is reflected to the second fluorescent component 400 through the reflection area, and the first laser light in the laser beam is transmitted to the dichroic mirror a through the transmission area, and is guided to the first fluorescent component 300 through the dichroic mirror a. The other part of the second fluorescence and the second laser is guided to the dichroic mirror a through the transmission region, and is combined with the first fluorescence generated by the first fluorescence component 300 excited by the first laser at the dichroic mirror a, and the dichroic mirror a guides the combined laser beam to a subsequent optical path.

In the embodiment of the present application, the driving assembly 500 may be a motor or a stepping motor. The driving precision of the motor or the stepping motor is high. Therefore, the movement of the polarization selector 202a on the dichroic mirror a can be precisely controlled by using a motor or a stepping motor to adjust the ratio of the second laser light reflected toward the second fluorescent member 400 and the first laser light transmitted toward the first fluorescent member 300. In other possible implementations, other driving components may also be adopted to drive the polarization selector 202a to move along the dichroic mirror a, which is not specifically limited in the embodiment of the present application.

Optionally, as shown in fig. 3 and 4, the laser light source 000 may further include: a first lens assembly 600 and a second lens assembly 700. The first lens assembly 600 may be located between the spectroscope assembly 200 and the first fluorescence assembly 300, and the second lens assembly 700 may be located between the spectroscope assembly 200 and the second fluorescence assembly 400. Illustratively, the laser 100, the beam splitter group 200, the first lens assembly 600, and the first fluorescence assembly 300 may be arranged in sequence along the target direction. The beam splitter group 200, the second lens assembly 700, and the second fluorescence assembly 400 may be sequentially arranged in a direction perpendicular to the target direction. In this application, the first lens assembly 600 and the second lens assembly 700 can be a collimating lens group. The second lens assembly 700 can focus the second laser light and then irradiate the second fluorescent assembly 400 to excite the second fluorescent light. The second fluorescent light assembly 400 reflects the second fluorescent light to the second lens assembly 700 and the other part of the second laser light is diffusely reflected to the second lens assembly 700, and the second lens assembly 700 collimates the other part of the second fluorescent light and the second laser light and then guides the collimated part of the second fluorescent light and the collimated part of the second laser light to the spectroscope group 200. The first lens assembly 600 may focus the first laser and then irradiate the first fluorescent assembly 300 to excite the first fluorescent light. The first fluorescence assembly 300 reflects the first fluorescence to the first lens assembly 600, and the first lens assembly 600 collimates the first fluorescence and guides the collimated first fluorescence to the spectroscope assembly 200.

In the embodiment of the present application, the laser 100 may be a blue laser, and both the first laser and the second laser may be blue lasers. One of the first fluorescence generated by the first fluorescence assembly 300 excited by the first laser and the second fluorescence generated by the second fluorescence assembly 400 excited by the second laser may be green fluorescence, and the other may be red fluorescence. For example, please refer to fig. 5, fig. 5 is a schematic structural diagram of a laser provided in an embodiment of the present application. The laser 100 may include: the laser unit comprises a plurality of laser units for emitting blue laser, and the laser units can be arranged in four rows and seven columns. In other possible implementations, the laser 100 may also include a plurality of laser units for emitting blue laser light, which are arranged in two rows and seven columns, and this is not specifically limited in this embodiment. In the present application, the first fluorescence may be red fluorescence, and the second fluorescence may be green fluorescence; alternatively, the first fluorescence may be green fluorescence, and the second fluorescence may be red fluorescence, which is not specifically limited in this application. In the examples of the present application, the first fluorescence is a green fluorescence, and the second fluorescence is a red fluorescence. Thus, the first fluorescent member 300 is irradiated with the blue laser light, and the green phosphor on the first fluorescent member 300 is excited to generate green fluorescence. The second fluorescent member 400 is irradiated by the blue laser light to excite the red phosphor on the second fluorescent member 400 to generate red fluorescence.

In the embodiment of the present application, in order to ensure the brightness of the combined laser beam, the wavelength of the green fluorescence is large, so that the spectral range of the laser can be covered in a large range. Therefore, when the first fluorescent light is green fluorescent light and the second fluorescent light is red fluorescent light, the proportion of the second laser light in the laser beam emitted by the laser 100 is smaller than that of the first laser light in the laser beam.

Optionally, the first fluorescent member 300 and the second fluorescent member 400 in the laser light source may each include: the fluorescent lamp comprises a heat conduction base, a reflection part fixed on the heat conduction base and a fluorescent part fixed on one side of the reflection part, which deviates from the heat conduction base. Referring to fig. 6, fig. 6 is a schematic structural diagram of another laser light source according to an embodiment of the present disclosure. The first fluorescent member 300 in the laser light source 000 may include: a first reflecting part 301, and a first fluorescent part 302 located on the side of the first reflecting part 301 close to the spectroscope group 200. The second fluorescent assembly 400 may include: a second reflecting portion 401, and a second fluorescent portion 402 located on a side of the second reflecting portion 401 close to the spectroscope group 200. Thus, when the first laser light in the laser beam irradiates the first fluorescent part 301 in the first fluorescent member 300, the laser beam excites the fluorescent material on the first fluorescent part 302, the fluorescent material generates the first fluorescent light under the excitation of the laser beam, and the first fluorescent light is reflected by the first reflecting part 301. When the second laser beam of the laser beam irradiates the second fluorescent member 400, a portion of the laser beam irradiates the second fluorescent portion 402 of the second fluorescent member 400, the laser beam excites the fluorescent material located on the second fluorescent portion 402, the fluorescent material generates second fluorescent light under the excitation of the laser beam, and the second reflecting portion 401 reflects the second fluorescent light and another portion of the second laser beam that is not excited.

In the present application, both the first phosphor assembly 300 and the second phosphor assembly 400 may be stationary phosphor assemblies, e.g., stationary phosphor plates. The fixed fluorescent components (i.e., the first fluorescent component and the second fluorescent component) do not need to be provided with a driving part, which is beneficial to reducing the occupied space of the fluorescent components in the laser light source 000 and is beneficial to the miniaturization design of the laser light source 000. In some special optical systems, the non-fixed fluorescent components alternately generate fluorescent light under the driving of the driving component, but the driving component may vibrate when driving the fluorescent components to rotate, which may affect the reliability of the system. And the fixed fluorescent component can effectively avoid the bad phenomenon that the fluorescent component vibrates relatively to the non-fixed fluorescent component.

In the embodiment of the present application, the fluorescent materials on the first fluorescent part 302 in the first fluorescent member 300 and the second fluorescent part 402 in the second fluorescent member 400 may be separated fluorescent powders that are bonded into layers by an organic adhesive such as silicone or epoxy; or, the separated phosphor is bonded into layers by an inorganic adhesive such as glass; alternatively, the phosphor material may be a phosphor ceramic, which is a structure having a continuous ceramic as a medium and phosphor particles distributed in the ceramic. The fluorescent material is not particularly limited in the examples of the present application.

Optionally, as shown in fig. 6, the first fluorescent component in the laser light source 000 may further include: and a first heat conductive base 303 positioned on a side of the first reflecting portion 301 facing away from the first fluorescent portion 302. In this case, a part of the light energy is converted into heat energy during the first laser light is irradiated onto the first fluorescent member 300 to excite the first fluorescent light. Thus, the heat can be timely conducted out through the first heat conducting base 303 and dissipated to the surrounding environment, so that the normal operation of the first fluorescent assembly 300 is ensured. In the present application, the second fluorescent member 400 in the laser light source 000 may further include: a second heat conducting base 403 located on the side of the second reflecting portion 401 facing away from the second fluorescent portion 402. In this case, a part of the light energy is converted into heat energy during the process that the second laser light is irradiated onto the second fluorescent member 400 to excite the second fluorescent light. In this manner, the heat can be conducted out through the second heat conducting base 403 in time and dissipated to the surrounding environment, thereby ensuring the normal operation of the second fluorescent assembly 400.

In the present application, in order to ensure that the display color of the combined laser beam is good, the color rendering property requires that the spectrum of three-color laser (blue laser, red laser, and green laser) is uniform. As shown in fig. 7 and 8, fig. 7 is a schematic diagram of the spectral distribution of red fluorescent light and green fluorescent light before being filtered by the dichroic mirror, and fig. 8 is a schematic diagram of the spectral distribution of red fluorescent light and green fluorescent light after being filtered by the dichroic mirror. The red fluorescence a generated by the second laser after exciting the second fluorescent component 400 is filtered by the dichroic mirror a, and the red fluorescence with smaller spectral width is reserved, and the green fluorescence b generated by the first laser after exciting the first fluorescent component 300 is filtered by the dichroic mirror a, and the green fluorescence with smaller spectral width is reserved, so that the difference between the spectral widths of the red fluorescence and the green fluorescence is smaller. And in the second laser, the laser (namely, blue laser) diffusely reflected by the second fluorescent component to the dichroic mirror a is filtered by the dichroic mirror a, and blue fluorescent light with a smaller spectral width is retained. Therefore, in the blue laser, the red laser and the green laser for light combination, the width of the spectrum of the three-color laser is small, namely the width distribution of the spectrum of the three-color laser is uniform, and the good display color of the laser beam after light combination is ensured.

In summary, the embodiment of the present application provides a laser light source, which may include: the device comprises a laser, a beam splitter group, a first fluorescent component, a second fluorescent component and a light outlet. Because the laser beam emitted by a single laser in the laser source only needs to be matched with the beam splitter group, the first fluorescent component and the second fluorescent component, the other part of the first fluorescent light, the second fluorescent light and the second laser can generate white light after light combination at the light outlet. Therefore, the number of optical devices included in the laser light source is reduced, and the volume of the whole laser light source is reduced. Therefore, the overall size of the lighting device integrated with the laser light source is smaller. In addition, the first fluorescence generated by exciting the first fluorescence component by the first laser is directly reflected to the subsequent light path through the spectroscope group without passing through the spectroscope group, so that the light energy loss of the first fluorescence is effectively avoided, and the good brightness of the laser beam after light combination is ensured.

Please refer to fig. 9, and fig. 9 is a block diagram of a lighting device according to an embodiment of the present application. The lighting device may include: a laser light source 000 and a dodging assembly 001. The laser light source 000 may be any of the laser light sources given in the above embodiments. The laser beams emitted by the laser light source 000 are combined and then guided to the light uniformizing assembly 001, and the light uniformizing assembly 001 can perform light uniformization on the laser beams. The illumination device can be applied to medical illumination. For example, the light homogenizing assembly 001 may be a fly-eye lens or a light guide, which is not specifically limited in this embodiment.

It should be noted that the laser light source 000 may also be applied to a laser projection apparatus to provide an illumination beam for imaging of the laser projection apparatus.

In this application, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The term "plurality" means two or more unless expressly limited otherwise.

The above description is intended to be exemplary only, and not to limit the present application, and any modifications, equivalents, improvements, etc. made within the spirit and scope of the present application are intended to be included therein.

Claims

1. A laser light source, comprising: the device comprises a laser, a beam splitter group, a first fluorescent component, a second fluorescent component and a light outlet;

2. The laser light source of claim 1, wherein the first partition comprises: a first dichroic mirror, the second partition comprising: a polarization selector for reflecting laser light of one polarization state and transmitting laser light of another polarization state.

3. The laser light source of claim 2, wherein the second partition further comprises: a second dichroic mirror disposed in a stack with the polarization selector, the polarization selector being closer to the laser than the second dichroic mirror.

4. The laser light source of claim 3, wherein the first dichroic mirror and the second dichroic mirror are different portions of the same dichroic mirror.

5. The laser light source of claim 4, further comprising: a drive assembly connected to the polarization selector;

wherein the drive assembly is configured to: and driving the polarization selector to move on the dichroic mirror.

6. The laser light source according to any one of claims 1 to 5, further comprising: the first lens assembly is positioned between the beam splitter group and the first fluorescent assembly, and the second lens assembly is positioned between the beam splitter group and the second fluorescent assembly.

7. The laser light source according to any one of claims 1 to 5, wherein the laser is a blue laser, the first laser and the second laser are both blue lasers, and one of the first fluorescence and the second fluorescence is green fluorescence and the other is red fluorescence.

8. The laser light source of claim 7, wherein when the first fluorescent light is green fluorescent light and the second fluorescent light is red fluorescent light, the proportion of the second laser light in the laser beam is smaller than the proportion of the first laser light in the laser beam.

9. The laser light source of any one of claims 1 to 5, wherein the first phosphor assembly and the second phosphor assembly each comprise: the fluorescent lamp comprises a heat conduction base, a reflection part fixed on the heat conduction base and a fluorescent part fixed on one side, deviating from the heat conduction base, of the reflection part.

10. An illumination device, comprising: a laser light source and a light homogenizing assembly, wherein the laser light source is the laser light source of any one of the claims 1 to 9.