CN112015037B

CN112015037B - Laser light source

Info

Publication number: CN112015037B
Application number: CN201910465510.9A
Authority: CN
Inventors: 王强; 陈龙; 葛明星
Original assignee: Wuxi Seemile Laser Display Technology Co Ltd
Current assignee: Wuxi Seemile Laser Display Technology Co Ltd
Priority date: 2019-05-30
Filing date: 2019-05-30
Publication date: 2022-06-03
Anticipated expiration: 2039-05-30
Also published as: CN112015037A

Abstract

The invention provides a laser light source which comprises a laser component, a dichroic mirror component, a light collecting device and a wavelength conversion component, wherein the laser component emits first wavelength laser and second wavelength laser; the first wavelength laser passes through the light collecting device and is emitted to the dichroic mirror assembly, the second wavelength laser is emitted to the wavelength conversion assembly under the guide of the dichroic mirror assembly to form a stimulated light, and the stimulated light and the first wavelength laser are converged under the action of the dichroic mirror assembly and are emitted along the same direction. The technical scheme of the invention effectively solves the problems of higher cost and larger volume of the laser light source system caused by more optical components and heat dissipation systems required by two independently arranged optical paths during light combination in the prior art.

Description

Laser light source

Technical Field

The invention relates to the technical field of laser lighting and display equipment, in particular to a laser light source.

Background

The blue picture structure which can be more soft and close to natural blue is realized by adding a laser with another wavelength on the light path, constructing the laser into a separate blue light path and combining the laser with a main light path to a light outlet. The method comprises the following specific steps:

the A laser has high excitation efficiency, but the blue color is relatively purple and unnatural. The B laser has low excitation efficiency, but the blue color is relatively natural and soft. Therefore, in the prior art, a is a single optical path, and B is a single optical path, and light emission of the light source is realized by light combination after the light combination.

The color of the current projector light source system, particularly the blue part, is relatively unnatural, purple and has great harm to human eyes. The main factor is that a high-energy short-wave single blue laser with high excitation efficiency is selected and is commonly used for blue light of a light source.

However, the prior art has the following disadvantages:

1. another blue light path needs to be added, so that the overall cost is increased greatly compared with the increase of optical components and heat dissipation systems.

2. In view of the whole volume of the light source, another light path needs to be added relatively to realize the required blue light (a + B), so that the volume of the optical machine after real realization is much larger.

Disclosure of Invention

The invention mainly aims to provide a laser light source to solve the problems that in the prior art, the cost and the size of a laser light source system are large due to the fact that optical components and a heat dissipation system are needed when two independently arranged optical paths are combined.

In order to achieve the above object, the present invention provides a laser light source, including a laser component, a dichroic mirror component, a light collecting device, and a wavelength conversion component, where the laser component emits a first wavelength laser and a second wavelength laser; the first wavelength laser passes through the light collecting device and is emitted to the dichroic mirror assembly, the second wavelength laser is emitted to the wavelength conversion assembly under the guide of the dichroic mirror assembly to form a stimulated laser, and the stimulated laser and the first wavelength laser are combined and emitted along the same direction under the action of the dichroic mirror assembly.

Furthermore, the second wavelength laser emitted from the laser component irradiates to the dichroic mirror component, is reflected by the dichroic mirror component to change the direction and irradiates to the wavelength conversion component, the wavelength is changed by the wavelength conversion component to form a laser-received light which irradiates to the dichroic mirror component, and the laser-received light passes through the dichroic mirror component to be converged with the first wavelength laser.

Furthermore, the first wavelength laser is collected by the light collecting device and then emitted to the dichroic mirror assembly, and is reflected by the dichroic mirror assembly to be merged with the second wavelength laser.

Further, when the first wavelength laser light passes through the dichroic mirror assembly, the first wavelength laser light passes through a region of the dichroic mirror assembly for transmitting the first wavelength laser light; or the first wavelength laser light passes outside the circumference of the dichroic mirror assembly.

Further, the region for transmitting the first wavelength laser light is transmitted by the laser light.

Further, the laser assembly comprises a base, a first wavelength laser and a second wavelength laser, the first wavelength laser and the second wavelength laser are installed on the base, the first wavelength laser emits first wavelength laser, the second wavelength laser emits second wavelength laser, and the first wavelength laser is located outside at least part of the circumference of the second wavelength laser.

Further, the dichroic mirror assembly is located between the laser assembly and the light collecting device, a plane of the dichroic mirror assembly and an emergent direction of the first wavelength laser form a preset angle, and the wavelength conversion assembly is located on one side, away from the junction of the first wavelength laser and the second wavelength laser, of the dichroic mirror assembly.

Further, the dichroic mirror assembly comprises a dichroic mirror, the first wavelength laser and the second wavelength laser are located in a projection area of the dichroic mirror to the laser assembly along the emission direction of the second wavelength laser, or the second wavelength laser is located in a projection area of the dichroic mirror to the laser assembly along the emission direction of the second wavelength laser, and the first wavelength laser is located outside the projection area of the dichroic mirror to the laser assembly along the emission direction of the second wavelength laser.

Furthermore, the second wavelength laser emitted from the laser assembly irradiates to the dichroic mirror assembly, penetrates through the dichroic mirror assembly to irradiate to the wavelength conversion assembly, the wavelength is changed by the wavelength conversion assembly to form a laser beam which irradiates to the dichroic mirror assembly, and the laser beam is reflected by the dichroic mirror assembly to be converged with the first wavelength laser.

Furthermore, the first wavelength laser is reflected by the dichroic mirror assembly and is emitted to the light collecting device, and the first wavelength laser is emitted to the dichroic mirror assembly after being collected by the light collecting device and passes through the dichroic mirror assembly to be converged with the second wavelength laser.

Furthermore, the first wavelength laser light is emitted to at least partial circumferential edge or circumferential outside of the dichroic mirror assembly by the laser assembly, and the first wavelength laser light collected by the light collecting device is emitted from the middle part of the dichroic mirror assembly.

Further, the dichroic mirror assembly is located between the laser assembly and the wavelength conversion assembly, and the light collection device is located on one side, away from the first wavelength laser and the second wavelength laser, of the dichroic mirror assembly, and the side is converged.

Further, dichroic mirror subassembly includes the dichroic mirror, and first wavelength laser and second wavelength laser are located the dichroic mirror along the emission direction of second wavelength laser to laser assembly's projection area, or the second wavelength laser is located the dichroic mirror along the emission direction of second wavelength laser to laser assembly's projection area, and outside the first wavelength laser is located the dichroic mirror along the emission direction of second wavelength laser to laser assembly's projection area, the dichroic mirror outside is provided with the reflector.

Further, the first surface of the dichroic mirror transmits a set of laser light of a specific wavelength range, and the second surface of the dichroic mirror reflects another set of laser light of a wavelength range.

Further, the wavelength of the first wavelength laser light is greater than the wavelength of the second wavelength laser light.

Further, laser source still includes light arrangement subassembly, and light arrangement subassembly sets up between laser subassembly and dichroic mirror subassembly.

Further, the laser light source also comprises a light homogenizing structure, and the light homogenizing structure is arranged between the laser assembly and the wavelength conversion assembly.

Furthermore, the light collection device comprises a first lens assembly and a reflection assembly, and the first wavelength laser light is emitted to the dichroic mirror assembly in parallel after passing through the light collection device.

Further, the reflection assembly comprises a plurality of reflection structures to reflect and condense the first wavelength laser light.

By applying the technical scheme of the invention, the laser assembly can emit the first wavelength laser and the second wavelength laser, two optical paths can be generated under the matching of the laser assembly and the dichroic mirror assembly, the first wavelength laser and the second wavelength laser can be converted into received laser by one wavelength laser in the light collection device and the wavelength conversion assembly and then combined by the dichroic mirror assembly, and the arrangement can enable the same group of equipment to complete the light combination of multiple paths of laser, thereby reducing the number of optical components and heat dissipation systems, lowering the cost of a laser light source and reducing the volume of the laser light source. The technical scheme of the invention effectively solves the problems of higher cost and larger volume of the laser light source system caused by more optical components and heat dissipation systems required by two independently arranged optical paths during light combination in the prior art.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic structural diagram of a first embodiment of a laser light source according to the present invention;

fig. 2 is a schematic structural diagram of a laser device according to a first embodiment of the present invention;

fig. 3 is a schematic structural diagram of a light splitting device according to a first embodiment of the present invention;

fig. 4 is another schematic structural view of the light splitting device according to the first embodiment of the present invention;

FIG. 5 is a side view of a light-splitting device according to a first embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a second embodiment of a laser light source according to the present invention;

FIG. 7 is a schematic structural view showing a spectroscopic apparatus according to a second embodiment of the present invention;

fig. 8 is another schematic structural view of the spectroscopic apparatus according to the second embodiment of the present invention.

Wherein the figures include the following reference numerals:

10. a laser assembly; 11. a first wavelength laser; 111. a first wavelength laser; 12. a second wavelength laser; 121. a second wavelength laser; 122. receiving laser; 20. a dichroic mirror assembly; 21. a dichroic mirror; 22. a planar lens; 23. a reflective mirror; 30. a light collection device; 31. a barrel mouth section; 32. a barrel bottom section; 40. a wavelength conversion component; 50. a light ray tidying assembly; 51. a convex lens; 52. a concave lens; 60. a light uniformizing structure; 70. a first lens assembly; 80. a second lens assembly; 90. and a light emitting structure.

Detailed Description

It should be noted that, in the present application, the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

Spatially relative terms, such as "above … …," "above … …," "above … … surface," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

Exemplary embodiments according to the present application will now be described in more detail with reference to the accompanying drawings. These exemplary embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. It is to be understood that these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art, in the drawings, the thicknesses of layers and regions are exaggerated for clarity, and the same devices are denoted by the same reference numerals, and thus the description thereof will be omitted.

The first embodiment,

As shown in fig. 1 to 5, a laser light source according to a first embodiment includes a laser assembly 10, a dichroic mirror assembly 20, a light collecting device 30, and a wavelength conversion assembly 40, wherein the laser assembly 10 emits a first wavelength laser light 111 and a second wavelength laser light 121. The first wavelength laser light 111 passes through the light collection device 30 and is emitted to the dichroic mirror assembly 20, the second wavelength laser light 121 is emitted to the wavelength conversion assembly 40 under the guidance of the dichroic mirror assembly 20 and forms the stimulated light 122, and the stimulated light 122 and the first wavelength laser light 111 are combined and emitted in the same direction under the action of the dichroic mirror assembly 20.

According to the technical scheme of the first application embodiment, the laser assembly 10 can emit the first wavelength laser 111 and the second wavelength laser 121, two optical paths can be generated under the cooperation of the laser assembly 10 and the dichroic mirror assembly 20, the first wavelength laser 111 and the second wavelength laser 121 can be converted into the received laser 122 through one wavelength laser in the light collection device 30 and the wavelength conversion assembly 40, and then the received laser is combined with the dichroic mirror assembly 20, so that the same group of devices can complete the light combination of multiple paths of lasers, the number of optical components and heat dissipation systems is reduced, the cost of the laser source is reduced, and the size of the laser source is reduced. The technical scheme of the first embodiment effectively solves the problems that in the prior art, the cost of a laser light source system is high and the size is large due to the fact that optical components and heat dissipation systems which are needed when two independently arranged optical paths are combined.

As shown in fig. 1 to 5, in the first embodiment, the second wavelength laser light 121 emitted from the laser module 10 is emitted to the dichroic mirror module 20, reflected by the dichroic mirror module 20 and redirected to the wavelength conversion module 40, the wavelength of the second wavelength laser light is changed by the wavelength conversion module 40 to form the received laser light 122, and the received laser light 122 is emitted to the dichroic mirror module 20, and the received laser light 122 passes through the dichroic mirror module 20 to be merged with the first wavelength laser light 111. In the above-described structure, when the second wavelength laser light 121 is emitted to the dichroic mirror assembly 20, the second wavelength laser light 121 is reflected by the dichroic mirror assembly 20, the reflected second wavelength laser light 121 is irradiated on the wavelength conversion assembly 40, and then, under the action of the wavelength conversion assembly 40, the reflected second wavelength laser light 121 is transited to form the received laser light 122 of another wavelength, the direction of the received laser light 122 is opposite to the direction of the reflected second wavelength laser light 121, and the received laser light 122 is emitted to the dichroic mirror assembly 20 and transmits through the dichroic mirror assembly 20, and then, the received laser light 122 is merged with the first wavelength laser light 111 on the side of the dichroic mirror assembly 20 away from the wavelength conversion assembly 40.

As shown in fig. 1 to 5, in the first embodiment, the first wavelength laser light 111 is collected by the light collecting device 30, and then emitted to the dichroic mirror assembly 20, and reflected by the dichroic mirror assembly 20 to be merged with the second wavelength laser light 121. In the above structure, a part of the surface of the dichroic mirror assembly 20 near the light collecting device 30 may reflect the first wavelength laser light 111, so that the first wavelength laser light 111 is collected by the light collecting device 30, then emitted to the dichroic mirror assembly 20, reflected again, and merged with the transmitted received laser light 122.

As shown in fig. 1 to 5, in the first embodiment, when the laser light 111 of the first wavelength is emitted from the laser module 10 to the light collecting device 30, the laser light 111 of the first wavelength passes through the dichroic mirror module 20, or the laser light 111 of the first wavelength does not pass through the dichroic mirror module 20. When the first wavelength laser light 111 does not pass through the dichroic mirror assembly 20 in the above-described structure, the first wavelength laser light 111 passes through at least a part of the circumference of the dichroic mirror assembly 20, that is, directly toward the light collection device 30 through the air.

As shown in fig. 1 to 5, in the first embodiment, the first wavelength laser light 111 passes through a region of the dichroic mirror assembly 20 for transmitting the first wavelength laser light 111. Or the first wavelength laser light 111 passes through the outside of the circumferential direction of the dichroic mirror assembly 20. The region for transmitting first-wavelength laser light 111 in the above-described structure may be a transparent region provided in dichroic mirror assembly 20, or a glass sheet transmission, or the like, or first-wavelength laser light 111 passes through outside the circumferential direction of dichroic mirror assembly 20. Further, the stimulated light 122 is transmitted through a region for transmitting the first wavelength laser light 111.

As shown in fig. 1 to 5, in the first embodiment, a laser assembly 10 includes a base, a first wavelength laser 11 and a second wavelength laser 12, the first wavelength laser 11 and the second wavelength laser 12 are mounted on the base, the first wavelength laser 11 emits a first wavelength laser 111, the second wavelength laser 12 emits a second wavelength laser 121, and the first wavelength laser 11 is located at least partially outside a circumferential direction of the second wavelength laser 12. The arrangement of the base in the above structure can make the installation of the laser assembly 10 more stable and reliable. The first wavelength laser 11 is used for emitting laser light 111 of a first wavelength, and the second wavelength laser 12 is used for emitting laser light 121 of a second wavelength. The first wavelength laser 11 is arranged at least partially circumferentially outside the second wavelength laser 12 in order to cooperate with the arrangement of the dichroic mirror assembly 20 to form at least two optical paths.

As shown in fig. 1 to 5, in the first embodiment, the dichroic mirror assembly 20 is located between the laser assembly 10 and the light collecting device 30, the plane of the dichroic mirror assembly 20 forms a predetermined angle with the emitting direction of the first wavelength laser light 111, and the wavelength conversion assembly 40 is located on the side of the dichroic mirror assembly 20 away from the junction of the first wavelength laser light 111 and the second wavelength laser light 121. The above structure can prevent the wavelength conversion member 40 from affecting the merging of the first wavelength laser light 111 and the second wavelength laser light 121. The plane of the dichroic mirror assembly 20 may form an optical path in a predetermined direction after forming a predetermined angle with the emission direction of the first wavelength laser light 111. Specifically, the predetermined angle may be any angle within the design range, preferably between 30 degrees and 80 degrees.

As shown in fig. 1 to 5, in the technical solution of the first embodiment, the dichroic mirror assembly 20 includes a dichroic mirror 21, the first wavelength laser 11 and the second wavelength laser 12 are located within a projected area of the dichroic mirror 21 toward the laser assembly 10 along the emission direction of the second wavelength laser light 121, or the second wavelength laser 12 is located within a projected area of the dichroic mirror 21 toward the laser assembly 10 along the emission direction of the second wavelength laser light 121, and the first wavelength laser 11 is located outside a projected area of the dichroic mirror 21 toward the laser assembly 10 along the emission direction of the second wavelength laser light 121. The above structure can make the dichroic mirror assembly 20 fit better with the first wavelength laser 11 and the second wavelength laser 12. Further, dichroic mirror assembly 20 also includes a mounting bracket on which dichroic mirror 21 is mounted to ensure stability of dichroic mirror 21. Further, an adjustment structure is provided on the mounting bracket to adjust a predetermined angle of the dichroic mirror 21.

As shown in fig. 1 to 5, in the first technical solution of the embodiment, the first surface of the dichroic mirror 21 transmits a group of laser light in a specific wavelength range, and the second surface of the dichroic mirror 21 reflects another group of laser light in another wavelength range. The wavelengths of first wavelength laser light 111 and second wavelength laser light 121 in the present embodiment are both in the wavelength range in which they can be reflected, and the wavelength of stimulated light 122 is in the wavelength range in which it can transmit dichroic mirror 21. Further, the first wavelength laser light 111 and the second wavelength laser light 121 in the wavelength range in which they can be reflected may be the same wavelength or different wavelengths. Specifically, the dichroic mirror of the dichroic mirror assembly is provided in a plate-like structure, and the dichroic mirror is provided as glass coated with a coating layer on both sides. Further, the wavelength of the first wavelength laser light is greater than the wavelength of the second wavelength laser light.

As shown in fig. 1 to 5, in the first technical solution of the embodiment, the laser light source further includes a light sorting assembly 50, and the light sorting assembly 50 is disposed between the laser assembly 10 and the dichroic mirror assembly 20. Light management assembly 50 may manage light between laser assembly 10 and dichroic mirror assembly 20 to ensure the quality of the light. Further, the light management assembly 50 at least partially covers a cross-section of the conductive path of the second wavelength laser light 121 to manage all of the second wavelength laser light 121.

As shown in fig. 1 to 5, in the first embodiment, the light ray tidying assembly 50 includes a convex lens 51 and a concave lens 52. The convex lens 51 is disposed between the laser assembly 10 and the dichroic mirror assembly 20. Concave lens 52 is disposed between convex lens 51 and dichroic mirror assembly 20, and is spaced apart from convex lens 51. In the above structure, the convex lens 51 covers the cross section of the conduction path of the second wavelength laser beam 121, the concave lens 52 is smaller than the convex lens 51, and the cross section of the conduction path of the second wavelength laser beam 121 is reduced after passing through the convex lens 51 and the concave lens 52.

As shown in fig. 1 to 5, in the first technical solution of the embodiment, the laser light source further includes a light unifying structure 60, and the light unifying structure 60 is disposed between the laser assembly 10 and the wavelength conversion assembly 40. The light uniformizing structure 60 in the above structure is used to eliminate speckles affecting the excessive light, and specifically, the light uniformizing structure 60 includes a diffusion sheet to eliminate speckles affecting the excessive light.

As shown in fig. 1 to fig. 5, in the first technical solution of the embodiment, the light collecting device 30 includes a first lens assembly 70 and a reflection assembly, and the first wavelength laser light 111 passes through the light collecting device, so that the first wavelength laser light 111 is emitted to the dichroic mirror assembly 20 in parallel. In the above structure, when the first wavelength laser light 111 passes through the light collection device 30, the light collection device 30 may collect the first wavelength laser light 111, so that a cross section of a conduction path of the first wavelength laser light 111 is the same as or similar to a cross section of a conduction path of the second wavelength laser light 121.

As shown in fig. 1 to 5, in the technical solution of the first embodiment, the reflection assembly includes a plurality of reflection structures to reflect and condense the first wavelength laser light 111. Specifically, the reflection assembly includes a nozzle section 31 and a bottom section 32, the cross-sectional area from a first end of the nozzle section 31 to a second end of the nozzle section 31 gradually increases, the edge of the bottom section 32 is connected to the first end of the nozzle section 31, and the center of the bottom section 32 is lower than the edge of the bottom section 32. The above structure can better reflect and condense the first wavelength laser light 111. The structure is a preferable scheme, and the reflection convergence structure with other shapes can be arranged according to the requirement. Further, the nozzle section 31 and the bottom section 32 are integrally provided. The first wavelength laser light 111 passing through the light collection device 30 is first irradiated on the barrel opening section 31, is irradiated on the barrel bottom section 32 after being reflected by the barrel opening section 31, is then irradiated on the opposite part of the barrel bottom section 32 after being reflected by the barrel bottom section 32, and is finally reflected toward the dichroic mirror assembly 20.

As shown in fig. 1 to 5, in the technical solution of the first embodiment, the laser light source further includes a first lens assembly 70, and the first lens assembly 70 is disposed between the light collection device 30 and the dichroic mirror assembly 20. The configuration of the first lens assembly 70 may further focus the first wavelength laser light 111 to make the cross section of the conduction path of the first wavelength laser light 111 closer to the cross section of the conduction path of the second wavelength laser light 121. Further, the first lens assembly 70 may be provided as a plurality of lenses, and the convergence of the first wavelength laser light 111 is adjusted by adjusting at least one of the lenses. Two convex lenses 51 having different sizes are preferably provided.

As shown in fig. 1 to 5, in the technical solution of the first embodiment, the laser light source further includes a second lens assembly 80, and the second lens assembly 80 is disposed between the wavelength conversion assembly 40 and the dichroic mirror assembly 20. The second lens assembly 80 in the above structure may be arranged to converge the second wavelength laser 121 that is to irradiate the wavelength conversion assembly 40, so as to better stimulate the wavelength conversion assembly 40 to form a more stable stimulated light 122. Further, the second lens assembly 80 may be provided as a plurality of lenses, and the convergence of the second wavelength laser light 121 is adjusted by adjusting at least one of the lenses. Two convex lenses 51 having different sizes are preferably provided.

As shown in fig. 1 to fig. 5, in the technical solution of the first embodiment, the laser light source further includes a light exit structure 90, and the light exit structure 90 is disposed on a conduction path after the received laser light 122 and the first wavelength laser light 111 are merged. The light-emitting structure 90 is arranged to project the merged first wavelength laser light 111 and second wavelength laser light 121.

Example II,

The laser light source of the second embodiment is different from the laser light source of the first embodiment in that:

as shown in fig. 6 to 8, a laser light source according to the second embodiment includes a laser module 10, a dichroic mirror module 20, a light collecting device 30, and a wavelength conversion module 40, and the laser module 10 emits first-wavelength laser light 111 and second-wavelength laser light 121. The first wavelength laser light 111 passes through the light collection device 30 and is emitted to the dichroic mirror assembly 20, the second wavelength laser light 121 is emitted to the wavelength conversion assembly 40 under the guidance of the dichroic mirror assembly 20 and forms the stimulated light 122, and the stimulated light 122 and the first wavelength laser light 111 are combined and emitted in the same direction under the action of the dichroic mirror assembly 20.

By applying the technical scheme of the second embodiment, the laser assembly 10 can emit the first wavelength laser 111 and the second wavelength laser 121, two optical paths can be generated under the cooperation of the laser assembly 10 and the dichroic mirror assembly 20, the first wavelength laser 111 and the second wavelength laser 121 can be converted into the received laser 122 by one wavelength laser in the light collection device 30 and the wavelength conversion assembly 40, and then the received laser 122 is combined by the dichroic mirror assembly 20. The second technical scheme of the embodiment effectively solves the problems that the cost of the laser light source system is high and the size is large due to the fact that optical components and heat dissipation systems which are needed when two independently arranged optical paths are combined in the prior art.

As shown in fig. 6 to 8, in the second embodiment, the second wavelength laser light 121 emitted from the laser module 10 is emitted to the dichroic mirror module 20, passes through the dichroic mirror module 20, is emitted to the wavelength conversion module 40, is changed in wavelength by the wavelength conversion module 40 to form the received laser light 122, and is emitted to the dichroic mirror module 20, and the received laser light 122 is reflected by the dichroic mirror module 20 to be merged with the first wavelength laser light 111. In the above-described structure, when the second-wavelength laser light 121 is emitted to the dichroic mirror assembly 20, the dichroic mirror assembly 20 is transmitted, the transmitted second-wavelength laser light 121 is irradiated onto the wavelength conversion assembly 40, and then, under the action of the wavelength conversion assembly 40, the transmitted second-wavelength laser light 121 is transited to form the received laser light 122 of another wavelength, the direction of the received laser light 122 is opposite to the direction of the second-wavelength laser light 121, and the received laser light 122 is emitted to the dichroic mirror assembly 20 and reflected by the dichroic mirror assembly 20, and then, the received laser light 122 and the first-wavelength laser light 111 are converged on the side of the dichroic mirror assembly 20 close to the wavelength conversion assembly 40.

As shown in fig. 6 to 8, in the second embodiment, the first wavelength laser light 111 is reflected by the dichroic mirror assembly 20 and emitted to the light collecting device 30, and the first wavelength laser light 111 is collected by the light collecting device 30 and emitted to the dichroic mirror assembly 20, and passes through the dichroic mirror assembly 20 to be merged with the second wavelength laser light 121. In the above structure, a part of the surface of the dichroic mirror assembly 20 near the light collecting device 30 can transmit the first wavelength laser light 111, so that the first wavelength laser light 111 is collected by the light collecting device 30 and then emitted to the dichroic mirror assembly 20, and is transmitted through the dichroic mirror assembly 20 to be merged with the reflected received laser light 122.

As shown in fig. 6 to 8, in the second embodiment, the laser assembly 10 includes a base, a first wavelength laser 11 and a second wavelength laser 12, the first wavelength laser 11 and the second wavelength laser 12 are mounted on the base, the first wavelength laser 11 emits a first wavelength laser 111, the second wavelength laser 12 emits a second wavelength laser 121, and the first wavelength laser 11 is located at least partially outside of a circumferential direction of the second wavelength laser 12. The arrangement of the base in the above structure can make the installation of the laser assembly 10 more stable and reliable. The first wavelength laser 11 is used for emitting laser light 111 of a first wavelength, and the second wavelength laser 12 is used for emitting laser light 121 of a second wavelength. The first wavelength laser 11 is arranged at least partially circumferentially outside the second wavelength laser 12 in order to cooperate with the arrangement of the dichroic mirror assembly 20 to form at least two optical paths.

As shown in fig. 6 to 8, in the second embodiment, the laser assembly 10 emits the first wavelength laser light 111 to at least a part of the circumferential edge of the dichroic mirror assembly 20, and the first wavelength laser light 111 collected by the light collecting device 30 is emitted from the middle of the dichroic mirror assembly 20. In the above structure, when the first wavelength laser light 111 passes through the light collection device 30, the light collection device 30 may collect the first wavelength laser light 111, so that a cross section of a conduction path of the first wavelength laser light 111 is the same as or similar to a cross section of a conduction path of the second wavelength laser light 121.

As shown in fig. 6 to 8, in the second embodiment, the dichroic mirror assembly 20 is located between the laser assembly 10 and the wavelength conversion assembly 40, and the light collection device 30 is located on the side of the dichroic mirror assembly 20 away from the junction of the first wavelength laser light 111 and the second wavelength laser light 121. The above structure can prevent the light collection device 30 from affecting the merging of the first wavelength laser light 111 and the second wavelength laser light 121. Further, the plane of the dichroic mirror assembly 20 is at a predetermined angle to the emission direction of the first wavelength laser light 111, and after the dichroic mirror assembly 20 is at the predetermined angle, an optical path may be formed in the predetermined direction. Specifically, the predetermined angle is between 30 degrees and 80 degrees.

As shown in fig. 6 to 8, in the second embodiment, the dichroic mirror assembly 20 includes a dichroic mirror 21, the first wavelength laser 11 and the second wavelength laser 12 are located within a projected area of the dichroic mirror 21 toward the laser assembly 10 in the emission direction of the second wavelength laser light 121, or the second wavelength laser 12 is located within a projected area of the dichroic mirror 21 toward the laser assembly 10 in the emission direction of the second wavelength laser light 121, and the first wavelength laser 11 is located outside a projected area of the dichroic mirror 21 toward the laser assembly 10 in the emission direction of the second wavelength laser light 121, and a reflective mirror 23 is provided outside the dichroic mirror 21. The above structure can make the dichroic mirror assembly 20 better fit with the first wavelength laser 11 and the second wavelength laser 12. The reflective mirror 23 and the dichroic mirror 21 are of an integral structure, for example, the reflective mirror 23 and the dichroic mirror 21 are of the same glass substrate, but the coatings of the two parts are different.

Further, dichroic mirror assembly 20 also includes a mounting bracket on which dichroic mirror 21 is mounted to ensure stability of dichroic mirror 21. Further, an adjustment structure is provided on the mounting bracket to adjust a predetermined angle of the dichroic mirror 21.

It is to be noted that the first surface of the dichroic mirror 21 transmits a set of laser light of a specific wavelength range, and the second surface of the dichroic mirror 21 reflects another set of laser light of a wavelength range. The wavelengths of the first wavelength laser light 111 and the second wavelength laser light 121 in the present embodiment are both in the wavelength range in which the dichroic mirror 21 can be transmitted, and the wavelength of the received laser light 122 is in the wavelength range in which it can be reflected. Further, the first wavelength laser light 111 and the second wavelength laser light 121 in the wavelength range in which the dichroic mirror 21 can transmit may be the same wavelength or different wavelengths. Specifically, the dichroic mirror of the dichroic mirror assembly is provided in a plate-like structure, and the dichroic mirror is provided as glass coated with a coating layer on both sides.

From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects: first wavelength laser 111 and second wavelength laser 121 can be sent out in laser subassembly 10's setting, can produce twice light path under the cooperation of laser subassembly 10 and dichroic mirror subassembly 20, first wavelength laser 111 and second wavelength laser 121 can be that one of them wavelength laser converts to receives laser 122 at light collection device 30 and wavelength conversion subassembly 40, later cooperate dichroic mirror subassembly 20 to close light, such setting can make same group equipment accomplish the light that closes of multichannel laser, and then reduce optical components and parts and cooling system's quantity, reduce laser source's cost, reduce laser source's volume. The technical scheme of the invention effectively solves the problems of higher cost and larger volume of the laser light source system caused by more optical components and heat dissipation systems required by two independently arranged optical paths during light combination in the prior art.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A laser light source comprising a laser assembly (10), a dichroic mirror assembly (20), a light collecting device (30), and a wavelength conversion assembly (40), the laser assembly (10) emitting laser light of a first wavelength (111) and laser light of a second wavelength (121);

the first wavelength laser light (111) passes through the light collecting device (30) and is emitted to the dichroic mirror assembly (20), the second wavelength laser light (121) is emitted to the wavelength conversion assembly (40) under the guidance of the dichroic mirror assembly (20) and forms laser light (122), and the laser light (122) and the first wavelength laser light (111) are combined under the action of the dichroic mirror assembly (20) and are emitted in the same direction;

the first wavelength laser (111) is emitted to the circumferential edge or the outer part of at least part of the dichroic mirror assembly (20) by the laser assembly (10), and the first wavelength laser (111) collected by the light collecting device (30) is emitted from the middle part of the dichroic mirror assembly (20);

the light collection device (30) comprises a first lens assembly (70) and a reflection assembly, the first wavelength laser light (111) is emitted to the dichroic mirror assembly (20) in parallel after passing through the light collection device (30), the reflection assembly comprises a plurality of reflection structures, the first wavelength laser light (111) which is emitted to at least partial circumferential edge or outside of the dichroic mirror assembly (20) is reflected and converged by the plurality of reflection structures, so that the converged first wavelength laser light (111) is emitted to the middle of the dichroic mirror assembly (20),

wherein, when the laser light (111) with the first wavelength is emitted from the laser assembly (10) to the light collection device (30), the laser light (111) with the first wavelength passes through the dichroic mirror assembly (20), or the laser light (111) with the first wavelength does not pass through the dichroic mirror assembly (20).

2. The laser light source according to claim 1, wherein the second wavelength laser light (121) emitted from the laser component (10) is directed to the dichroic mirror component (20), reflected and redirected by the dichroic mirror component (20) to the wavelength conversion component (40), wavelength-converted by the wavelength conversion component (40) to form the received laser light (122) to be directed to the dichroic mirror component (20), and the received laser light (122) passes through the dichroic mirror component (20) to be merged with the first wavelength laser light (111).

3. The laser light source according to claim 2, wherein the laser light (111) of the first wavelength is collected by the light collecting device (30), is emitted to the dichroic mirror assembly (20), and is reflected by the dichroic mirror assembly (20) to be combined with the laser light (121) of the second wavelength.

4. The laser light source according to claim 3, characterized in that the first wavelength laser light (111) passes through a region of the dichroic mirror assembly (20) for transmitting the first wavelength laser light (111); or

The first wavelength laser light (111) passes outside the circumferential direction of the dichroic mirror assembly (20).

5. The laser light source according to claim 4, characterized in that the stimulated light (122) is transmitted through a region for transmitting the first wavelength laser light (111).

6. The laser light source according to claim 1, characterized in that the laser assembly (10) comprises a base, a first wavelength laser (11) and a second wavelength laser (12), the first wavelength laser (11) and the second wavelength laser (12) being mounted on the base, the first wavelength laser (11) emitting first wavelength laser light (111), the second wavelength laser (12) emitting second wavelength laser light (121), the first wavelength laser (11) being located at least partially circumferentially outside the second wavelength laser (12).

7. The laser light source according to claim 6, characterized in that the dichroic mirror assembly (20) is located between the laser assembly (10) and the light collecting device (30), and a plane of the dichroic mirror assembly (20) is at a predetermined angle to an exit direction of the first wavelength laser light (111), and the wavelength conversion assembly (40) is located at a side of the dichroic mirror assembly (20) facing away from where the first wavelength laser light (111) and the second wavelength laser light (121) merge.

8. The laser light source according to claim 6, characterized in that the dichroic mirror assembly (20) comprises a dichroic mirror (21), and the first wavelength laser (11) and the second wavelength laser (12) are located within a projected area of the dichroic mirror (21) toward the laser assembly (10) in an emission direction of the second wavelength laser light (121), or

The second wavelength laser (12) is located within a projection area of the dichroic mirror (21) toward the laser module (10) along an emission direction of the second wavelength laser light (121), and the first wavelength laser (11) is located outside the projection area of the dichroic mirror (21) toward the laser module (10) along the emission direction of the second wavelength laser light (121).

9. The laser light source according to claim 1, wherein the second wavelength laser light (121) emitted from the laser component (10) is directed to the dichroic mirror component (20) and is directed to the wavelength conversion component (40) through the dichroic mirror component (20), the wavelength of the laser light (122) is changed by the wavelength conversion component (40) to be directed to the dichroic mirror component (20), and the laser light (122) is reflected by the dichroic mirror component (20) to be merged with the first wavelength laser light (111).

10. The laser light source according to claim 9, wherein the laser light (111) of the first wavelength is reflected by the dichroic mirror assembly (20) and directed to the light collecting device (30), and the laser light (111) of the first wavelength is collected by the light collecting device (30) and directed to the dichroic mirror assembly (20), and passes through the dichroic mirror assembly (20) to be merged with the laser light (121) of the second wavelength.

11. The laser light source according to claim 10, characterized in that the laser assembly (10) comprises a base, a first wavelength laser (11) and a second wavelength laser (12), the first wavelength laser (11) and the second wavelength laser (12) being mounted on the base, the first wavelength laser (11) emitting first wavelength laser light (111), the second wavelength laser (12) emitting second wavelength laser light (121), the first wavelength laser (11) being located at least partially circumferentially outside the second wavelength laser (12).

12. The laser light source according to claim 11, characterized in that the dichroic mirror assembly (20) is located between the laser assembly (10) and the wavelength conversion assembly (40), and the light collecting device (30) is located at a side of the dichroic mirror assembly (20) facing away from where the first wavelength laser light (111) and the second wavelength laser light (121) meet.

13. The laser light source according to claim 11, characterized in that the dichroic mirror assembly (20) comprises a dichroic mirror (21), and the first wavelength laser (11) and the second wavelength laser (12) are located within a projected area of the dichroic mirror (21) toward the laser assembly (10) in an emission direction of the second wavelength laser light (121), or

The second wavelength laser (12) is located in a projection area of the dichroic mirror (21) towards the laser assembly (10) along the emission direction of the second wavelength laser light (121), the first wavelength laser (11) is located outside the projection area of the dichroic mirror (21) towards the laser assembly (10) along the emission direction of the second wavelength laser light (121), and a reflective mirror (23) is arranged outside the dichroic mirror (21).

14. The laser light source according to claim 8 or 13, characterized in that the first surface of the dichroic mirror (21) transmits laser light of a certain set of wavelength ranges and the second surface of the dichroic mirror (21) reflects laser light of another set of wavelength ranges.

15. The laser light source according to any one of claims 1 to 13, wherein the wavelength of the first wavelength laser light is greater than the wavelength of the second wavelength laser light.

16. The laser light source according to any one of claims 1 to 13, further comprising a light management assembly (50), the light management assembly (50) being disposed between the laser assembly (10) and the dichroic mirror assembly (20).

17. The laser light source of claim 16, further comprising a light unifying structure (60), the light unifying structure (60) being disposed between the laser assembly (10) and the wavelength conversion assembly (40).