CN116027621A - Laser light source device and light source system - Google Patents

Abstract

The application provides a laser light source device and light source system, the laser light source device includes: a housing, a light source assembly, and a lens assembly; the light source assembly is arranged in the shell and comprises a laser and a wavelength conversion piece and is used for generating emergent rays; an opening is formed in one side of the shell, the lens assembly is fixedly connected with the shell through the opening to seal the opening to form a sealed space, and the lens assembly is used for collecting and transmitting the emergent light rays to form emergent light spots; the housing comprises a base, the base is arranged on one side opposite to the opening, the wavelength conversion piece is fixedly connected with the base, is arranged on one surface of the base facing the opening, and is covered by the vertical projection of the lens assembly on the base. Through the mode, the light source utilization rate can be improved.

Description

Laser light source device and light source system

Technical Field

The application belongs to the technical field of optics, and particularly relates to a laser light source device and a light source system.

Background

In the laser light source system, the laser and the wavelength conversion device are integrally packaged in a shell, so that the laser light source system has the advantages of small size and convenience in use, but fluorescence generated by exciting laser by the wavelength conversion device is lambertian, the divergence angle reaches 180 degrees, and light generated by a light source is difficult to fully utilize due to the size limitation of the laser light source system.

Disclosure of Invention

To the above technical problems, the present application provides a laser light source device and a light source system, which can improve the light source utilization rate.

In order to solve the above technical problem, the present application provides a laser light source device, including: a housing, a light source assembly, and a lens assembly; the light source assembly is arranged in the shell and comprises a laser and a wavelength conversion piece and is used for generating emergent rays; an opening is formed in one side of the shell, the lens component is arranged at the opening and is fixedly connected with the shell to block the opening to form a sealed space, and the lens component is used for collecting and transmitting the emergent light rays to form emergent light spots;

the housing comprises a base, the base is arranged on one side opposite to the opening, the wavelength conversion piece is fixedly connected with the base, and the wavelength conversion piece is arranged on one surface of the base facing the opening.

Preferably, the housing further includes a sealing cover, the opening is formed in the sealing cover, and the lens assembly is disposed at the opening to block the opening to form a sealing space.

Preferably, the light source assembly further includes a heat sink fixedly connected to the laser and fixedly connected to a side of the base facing the opening.

Preferably, the light source assembly further includes a condensing lens disposed at a light emitting end of the laser for adjusting a divergence angle of the emitted light.

Preferably, a surface of the heat sink facing away from the base is an inclined surface with a preset angle, the laser is fixedly connected to the inclined surface, the brewster angle of the incident surface medium of the wavelength conversion member is α, and the inclined surface is inclined at an angle such that the incident angle of the outgoing light on the wavelength conversion member is α -20 ° to α+10°.

Preferably, the light source assembly further includes a reflector, the brewster angle of the incident surface medium of the wavelength conversion member is α, and the reflector is disposed obliquely at a predetermined angle, and the predetermined angle is such that the incident angle of the outgoing light reflected by the reflector on the wavelength conversion member is α -20 ° to α+10°.

Preferably, the light source assembly further includes a polarization rotator for converting the outgoing light into P-polarized light.

Preferably, the laser is disposed on a side surface of the heat sink perpendicular to the base, so that the outgoing light projected onto the wavelength conversion member is P polarized light.

Preferably, the housing is in a U-shaped groove shape, and the lens assembly is fixedly connected with the side wall of the housing through an opening of the U-shaped groove, so that a sealed space is formed between the housing and the lens assembly.

Preferably, a convex region is provided on a surface of the lens assembly facing the base, and a vertical projection of the convex region on the base covers the wavelength conversion member.

Preferably, the light source assembly further includes a light guide of a predetermined length, the light guide is disposed at a light emitting end of the laser, an end surface of the light guide away from the laser is disposed as a reflection inclined surface, and the emitted light is reflected by the reflection inclined surface and then projected onto the wavelength conversion member.

In order to solve the technical problem, the application provides a light source system which comprises the laser light source device.

The beneficial effects of this application are: unlike the prior art, the lens assembly for collecting light and the shell of the laser light source device are fixedly arranged to form a sealed space, wherein the lens assembly can collect light in the shell, and the divergence angle of the light is reduced; further, the lens component is arranged on the shell and is closer to the wavelength conversion piece, so that more light rays generated by the laser light source device can be collected, energy loss caused by light ray divergence is reduced, the collection efficiency of the light rays is improved, and the light source utilization rate is further improved; meanwhile, the lens assembly and the shell are fixedly installed, the shell itself forms a fixing structure of the lens assembly, the lens assembly is not required to be additionally provided with the fixing structure, the installation space of the lens assembly can be saved, and the overall structure of the laser light source device is simpler and more compact.

Drawings

FIG. 1 is a schematic side cross-sectional view of a first embodiment of a laser light source device of the present application;

FIG. 2 is a schematic side cross-sectional view of a second embodiment of the laser light source device of the present application;

FIG. 3 is a schematic side cross-sectional view of a third embodiment of a laser light source device of the present application;

FIG. 4 is a schematic side cross-sectional view of a fourth embodiment of a laser light source device of the present application;

FIG. 5 is a schematic side cross-sectional view of a fifth embodiment of a laser light source device of the present application;

FIG. 6 is a schematic side cross-sectional view of a sixth embodiment of a laser light source device of the present application;

FIG. 7 is a schematic side cross-sectional view of a seventh embodiment of a laser light source device of the present application;

fig. 8 is a schematic side sectional view of an eighth embodiment of the laser light source device of the present application.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without inventive effort, are within the scope of the present application based on the embodiments herein. The "first" and "second" expressed in this application do not represent a sequence, only serve as a pointing function, and the "and/or" expressed in this application is only used to describe association relationships of association objects, which means that three relationships may exist, and does not limit the association relationships.

The present inventors have long studied and found that in a laser light source device, a light emitting end corresponding to a housing of the laser light source device is generally set as a flat window light transmitting region, and an optical element such as a lens is disposed on an emitting light path behind the flat window light transmitting region to collect emitted light. Although the arrangement can play a role in reducing the divergence angle of emergent light, the emergent light has a larger divergence range after passing through the flat window light transmission area due to the longer distance between the optical element and the fluorescent wavelength conversion element (such as a fluorescent sheet), and the size of the optical element is limited due to the volume limitation of the laser light source device, so that the optical element can only cover a small part of the light divergence area, the light receiving range is smaller, the light collecting efficiency is low, and the light source cannot be fully utilized.

In order to solve the above technical problems, the present application proposes the following embodiments.

Referring to fig. 1, fig. 1 is a schematic side sectional view of a first embodiment of a laser light source device of the present application.

As shown in fig. 1, the present embodiment provides a laser light source device 10 including a housing 11, a light source assembly 12, and a lens assembly 13; wherein, the light source assembly 12 is disposed in the housing 11, and the light source assembly 12 includes a laser 121 and a wavelength conversion member 122 for generating outgoing light; one side of the housing 11 is provided with an opening 111, the lens assembly 13 is disposed at the opening 111 and fixedly connected with the housing 11 to block the opening 111 to form a sealed space, and the lens assembly 13 is used for collecting and transmitting emergent light to form an emergent light spot.

The housing 11 includes a base 112, the base 112 is disposed on a side opposite to the opening 111, and the wavelength conversion member 122 is fixedly connected to the base 112 and disposed on a surface of the base 112 facing the opening 111.

According to the laser light source device, the lens component is arranged on the shell of the laser light source device to collect emergent light, so that the light can be more intensively distributed in a smaller light spot range; meanwhile, the lens component is arranged on the shell, so that the distance between the lens component and the wavelength conversion component is smaller, fluorescence excited by the wavelength conversion component can be collected by the lens component more, and the light source utilization rate is improved; further, this application is fixed the lens subassembly through the casing replacement fixed bolster, can reduce the installation space of laser light source device for laser light source device's overall structure sets up more simple compacter.

In this embodiment, the laser 121 may be a laser chip, and a heat conducting material, such as a heat sink, may be disposed between the laser 121 and the wall of the housing 11, so that heat generated by the laser 121 is conveniently conducted to the wall of the housing 11 through the heat conducting material, and is conducted out of the housing 11 through the wall of the housing 11, where the wall is the base 112, and the base 112 is a part of the wall of the housing 11. In addition, the laser chip may be provided in one or more as needed, without particular limitation.

Further, in this embodiment, the wavelength conversion member 122 is fixedly connected to the base 112, and the laser 121 can flexibly adjust the installation position and angle according to the position of the wavelength conversion member 122 on the base 112, so that the laser beam generated by the laser 121 can be directly projected onto the wavelength conversion member 122, so that the emitted fluorescence generated by the excitation of the laser beam by the wavelength conversion member 122 and the emitted laser beam not utilized by the wavelength conversion member 122 together form an emitted light.

Further, in the present embodiment, the fluorescence excitation surface (not shown) of the wavelength conversion member 122 may be disposed on the opposite side of the wavelength conversion member 122 from the base 112, so that the excited fluorescence is emitted toward the opposite side of the housing 11 from the base 112. Further, the housing 11 is provided with an opening 111 at a wall opposite to the base 112, and the lens assembly 13 seals the opening 111 to form a sealed space with the housing 11. Further, the vertical projection of the lens component 13 on the base 112 can be set to cover the wavelength conversion component 122, so that fluorescence excited by the fluorescence excitation surface of the wavelength conversion component 122 can be more projected to one surface of the lens component 13 facing the base 112, and then collected by the lens component 13, so that the collection efficiency of fluorescence is improved, and the utilization rate of emergent light is further improved.

The distance between the lens assembly 13 and the wavelength conversion member 122 may be reduced as much as possible by the reasonable design of the housing 11, so as to reduce the distance between the lens assembly 13 and the fluorescence excitation surface of the wavelength conversion member 122, and further enable more fluorescence light to be collected with a smaller lens area, so that the volume of the lens assembly 13 can be reduced, the collection efficiency of fluorescence can be improved, and the energy utilization rate of the light source can be improved.

Here, the fluorescence excitation surface of the wavelength conversion member 122 may be provided as a fluorescent layer, a fluorescent sheet, or the like to achieve conversion of laser light into fluorescence, and the specific arrangement is not limited herein. Further, the wavelength conversion member 122 may include a fluorescent layer (not shown), a reflective layer (not shown) and a heat dissipation layer (not shown), wherein the reflective layer may be disposed between the fluorescent layer and the heat dissipation layer to reflect the fluorescent light excited by the fluorescent layer and the unused laser light toward the lens assembly 13, and the heat dissipation layer may be fixedly connected to the base 112 so as to conduct the heat generated by the wavelength conversion member 122 to the housing 11 through the heat dissipation layer and dissipate the heat through the housing 11. The specific material of the heat dissipation layer may be flexibly set, which is not limited herein.

Further, the lens assembly 13 is fixedly connected with the housing 11 through the opening 111 of the housing 11 on the wall of the housing, and forms a sealing space with the housing 11, so that the overall tightness of the laser light source device 10 can be ensured, and meanwhile, by using the housing 11 itself as a fixing structure of the lens assembly 13, the need of additionally arranging a fixing structure to fix the lens assembly 13 can be avoided, the overall structure of the laser light source device 10 can be simplified, and the structural arrangement thereof is more compact. Of course, in other embodiments, no securing structure may be required such that the lens assembly 13 is integrally formed with the housing 11. In addition, the lens assembly 13 may include a converging lens, although other types of lenses may be provided as desired.

Further, in the present embodiment, the light source assembly 12 may further include a heat sink 120, and the heat sink 120 is fixedly connected to the laser 121 and fixedly connected to a surface of the base 112 facing the opening 111.

Specifically, the heat sink 120 may be disposed between the laser 121 and the wall of the housing 11, so as to conduct heat generated by the laser 121 to the wall, and further radiate the heat out of the housing 11 through the wall. Further, the heat sink 120 may be used as a fixing support for the laser 121, and the laser 121 may be fixedly installed in the housing 11 through the heat sink 120, and the specific fixing manner is not limited herein. Specifically, the relative fixing structure of the heat sink 120 and the laser 121 may be adjusted to adjust the emitting direction of the laser beam of the laser 121, so that the laser beam may be projected onto the wavelength conversion member 122, or the incident angle of the laser beam on the wavelength conversion member 122 may be further adjusted, so as to reduce the reflection of the laser and improve the fluorescence conversion efficiency. In other embodiments, the heat dissipation layer used by the wavelength conversion member 122 may also be the same component as the heat sink 120.

Further, referring to fig. 2, fig. 2 is a schematic side view of a second embodiment of the laser light source device of the present application. As shown in fig. 2, compared with the first embodiment, the light source assembly 22 in the present embodiment further includes a condensing lens 223, the condensing lens 223 is disposed at the light emitting end of the laser 221, and is used for adjusting the divergence angle of the emitted light, and the housing 21, the lens assembly 23 and other settings in the light source assembly 22 in the present embodiment may be the same as the first embodiment, and will not be described herein.

In this embodiment, the laser 221 emits a laser beam through the light emitting end, and the light emitting end of the laser 221 is provided with the condensing lens 223, so that the laser beam emitted by the laser 221 can be condensed by the condensing lens 223, and the condensed laser beam is projected onto the wavelength conversion member 222. The condensing lens 223 condenses the laser beam, so that on one hand, the light projected onto the wavelength conversion element 222 is prevented from being reduced due to the overlarge divergence angle of the laser beam, and the collimation effect is achieved; on the other hand, the incident angle of the laser beam on the wavelength conversion member 222 can be adjusted by condensing the laser beam by the condensing lens 223. Therefore, by providing the condensing lens 223, not only the laser energy ratio projected onto the wavelength conversion member 222 can be increased, but also the laser beam can be adjusted to be incident on the wavelength conversion member 222 at a proper incident angle, thereby increasing the conversion rate of the laser beam and improving the light emitting effect of the laser light source device 20. Specifically, the condensing lens may be a convex lens, a cylindrical lens, etc., and may be set according to actual needs.

In addition to the application scenarios in the first and second embodiments, in some specific application scenarios, the laser beam generated by the laser cannot be directly or converged by the condensing lens to be projected onto the wavelength conversion element. Specifically, referring to fig. 3, fig. 3 is a schematic side sectional view of a third embodiment of the laser light source device of the present application.

In the present embodiment, compared with the second embodiment, the light source assembly 32 further includes the reflector 324, and the arrangement of the housing 31 and the lens assembly 33 can be the same as that of the second embodiment, and the description thereof will be omitted. As shown in fig. 3, unlike the first and second embodiments, in the present embodiment, the relative structure of the laser 321 and the heat sink 320 in the light source assembly 32 is such that the laser beam generated by the laser 321 cannot be directly or condensed by the condensing lens 323 and then projected onto the wavelength conversion member 322. The condensing lens 323 and the wavelength conversion member 322 may be the same as those in the second embodiment.

Specifically, in the present embodiment, the laser beam generated by the laser 321 is collected by the condensing lens 323, then projected to the reflecting mirror 324, reflected by the reflecting mirror 324, incident on the wavelength conversion member 322, and then converted into fluorescence by the wavelength conversion member 322, and then emitted.

By providing the reflecting mirror 324, the installation position of the laser 321 and the direction setting of the light emitting end of the laser 321 in this embodiment may not be limited to the direction setting toward the wavelength conversion member 322, and the installation structure and the installation direction of the two may be more flexibly set, so that the structure setting of the laser light source device 30 is more flexible.

Further, in the first to third embodiments, the polarization direction of the laser beam emitted by the laser is not a single direction, and in the case where the polarization element is not provided, the laser beam portion projected onto the wavelength conversion member is reflected, so that the fluorescence conversion efficiency on the wavelength conversion member is reduced. Referring to fig. 4, fig. 4 is a schematic side sectional view of a fourth embodiment of the laser light source device of the present application.

Specifically, the arrangement of the housing 41 and the lens assembly 43 may be the same as in the above-described embodiment. Unlike the above embodiments, in the present embodiment, the light source assembly 42 further includes the polarization rotator 425, the condenser lens 423 and the polarization rotator 425 are disposed in order along the laser light emitting path of the laser 421 for converting the emitted light into P-polarized light.

Further, by adjusting the incident angle of the laser beam projected onto the wavelength conversion element 422, and combining the characteristic that the laser beam is in the P polarization state, for example, the laser beam is projected onto the wavelength conversion element 422 at the brewster angle of the medium of the wavelength conversion element 422 or the incident angle close to the brewster angle, so as to reduce the reflection of the laser beam on the wavelength conversion element 422 and increase the laser conversion efficiency of the wavelength conversion element 422.

In this embodiment, an application scenario in which the polarization rotator 425 is applied to the third embodiment is taken as an example, where other settings of the laser light source device 40 except for the polarization rotator 425 are the same as those of the third embodiment, and will not be described herein. In this embodiment, after the laser 421 is fixed on the surface of the heat sink 420 facing away from the base 412, the laser beam emitted from the laser 421 cannot be obliquely projected onto the wavelength conversion member 422. The angle of incidence of the laser beam onto the wavelength conversion member 422 can be adjusted by adjusting the angle of inclination of the reflecting member 424. For example, setting the brewster angle of the incident surface medium of the wavelength conversion element 422 to be α can set the reflecting element 424 to be inclined at a predetermined angle, and the predetermined angle can enable the incident angle of the outgoing light reflected by the reflecting element 424 on the wavelength conversion element to be α -20 ° to α+10°.

Further, the application of the polarization rotator 425 is not limited to the example in fig. 4, and is also applicable to the application scenarios of the first and second embodiments.

Specifically, in the application scenario of the first embodiment and the second embodiment, one surface of the heat sink, which faces away from the base, is an inclined surface with a preset angle, the laser is fixedly connected to the inclined surface, the brewster angle of the incident surface medium of the wavelength conversion element is set to be alpha, the inclination angle of the inclined surface of the heat sink can be adjusted, so that the incident angle of the outgoing light on the wavelength conversion element is alpha-20 degrees to alpha+10 degrees, and meanwhile, a condensing lens and a polarization rotation element are sequentially arranged at the light emergent end of the laser, or only the polarization rotation element is arranged, so that the laser beam projected onto the wavelength conversion element is converted into a P polarization state, laser reflection is reduced, and fluorescence conversion rate is improved.

By setting the polarization rotator 425 and adjusting the direction of the laser beam in this embodiment, the laser beams in the application scene can be projected to the wavelength converter 422 at the brewster angle, so as to reduce the reflection of the laser on the wavelength converter 422 and increase the fluorescence conversion efficiency of the wavelength converter 422.

The wavelength conversion element 422 may be a 1/2 wave plate, or other optical element capable of converting the polarization state of laser light, which is not limited herein.

Referring to fig. 5, fig. 5 is a schematic side sectional view of a fifth embodiment of the laser light source device of the present application.

Unlike the fourth embodiment, in the present embodiment, the polarization rotator is not provided, and the laser 521 is not provided on the side of the heat sink facing away from the base 512. Specifically, the laser 521 is disposed on a side of the heat sink perpendicular to the base 512, such that the outgoing light projected onto the wavelength conversion member 522 is P-polarized light.

In the fourth embodiment, the laser is disposed on the surface of the heat sink facing away from the base, so that the laser beam emitted by the laser can be converted into the laser beam in the P polarization state only by the polarization rotating member. In this embodiment, the laser 521 may be fixed on a side of the heat sink 520 perpendicular to the base 512, so that the laser beam and the light beam incident on the wavelength conversion member 522 are P polarized by adjusting the beam emitting direction of the laser 521 on the heat sink 520. In addition, the laser 521 is disposed on the side of the heat sink 520 perpendicular to the base 512, which is also beneficial to reducing the dimension in the direction perpendicular to the base 512, thereby reducing the overall dimension of the laser light source, and shortening the heat conduction distance with the base 512, which is beneficial to enhancing the heat dissipation capability of the laser light source.

In some specific application examples, as shown in fig. 5, a condenser 523 may be disposed at a light emitting end of the laser 521, and the laser beam emitted from the laser 521 is transmitted through the condenser 523 to reduce a divergence angle and then projected onto a reflecting member 524, where the reflecting member 524 reflects the laser beam onto the wavelength conversion member 522 to convert the laser beam into fluorescence. In the present embodiment, the case 51, the lens assembly 53, and other arrangements in the light source assembly 52 in the laser light source device 50 may be the same as any one of the first to third embodiments except for the relative position arrangement of the laser 521 and the heat sink 520, and no limitation is made here.

Referring to fig. 6, fig. 6 is a schematic side sectional view of a sixth embodiment of the laser light source device of the present application.

In this embodiment, the light source assembly 62 further includes a light guide 626 with a predetermined length, the light guide 626 is disposed at the light emitting end of the laser 621, the end surface of the light guide 626 away from the laser 621 is disposed as a reflective inclined surface, and the emitted light is reflected by the reflective inclined surface and then projected onto the wavelength conversion member 622.

In the present embodiment, the arrangement of the laser 621 and the corresponding heat sink 620, wavelength conversion member 622, housing 61, and lens assembly 63 in the laser light source device 60 may be the same as any of the first to fifth embodiments, and is not limited herein.

Specifically, in the present embodiment, the light source assembly 62 is provided with a light guide 626 at the light emitting end of the laser 621, and the light emitting end of the laser 621 emits a laser beam, which can be coupled into the light guide 626. Further, a reflecting slope is disposed at the end of the light guide 626, and after the laser beam is coupled into the light guide 626, multiple reflections occur in the light guide 626, and finally, the reflection occurs at the reflecting slope at the end of the light guide 626, so that the laser beam is projected onto the wavelength conversion member 622 from the side of the light guide 626 facing the wavelength conversion member 622.

By adjusting the preset length of the light guide 626 and the angle of the end inclined plane, the incidence angle of the central ray in the laser beam on the wavelength conversion element 622 can be made smaller than 30 degrees, so as to reduce the incidence angle of the laser beam on the wavelength conversion element 622, further reduce the reflectivity of the laser beam and improve the utilization rate of laser.

Further, a certain preset distance from the wavelength conversion element 622 may be set on the surface of the end of the light guide 626 facing the wavelength conversion element 622 for emitting light, for example, the preset distance is greater than 0.3mm, so that the area of the light guide 626 for shielding the wavelength conversion element 622 is smaller, and the proportion of the area of the light emitting spot shielded by the light guide 626 is reduced, thereby improving the fluorescence utilization efficiency.

After the laser beam is reflected and propagated in the light guide 626, the power distribution of the laser beam is more uniform, and when the laser beam is incident on the wavelength conversion element 622, the density distribution of the laser power is also more uniform, so that the power quenching caused by the fluorescent layer or the fluorescent sheet on the wavelength conversion element 622 for exciting the laser can be reduced.

Specifically, the light guide 626 may be a square light guide, a circular light guide, and the light guide 626 may also be a circular optical fiber or a square optical fiber, neither of which are limiting herein. When the light guide 626 is a square light guide, its aspect ratio may be adjusted to adjust the desired spot shape of the wavelength conversion member 622.

Further, the end slope of the light guide 626 may be set to an angle consistent with total reflection or may be coated with a reflective film, without limitation.

In some specific application examples, a cylindrical mirror or a condensing lens in the above embodiment may be further disposed between the laser 621 and the light guide 626 to reduce the divergence angle of the laser beam, which will not be described herein.

Further, in the first to sixth embodiments, the housing may be provided to include a sealing cover, the opening is provided on the sealing cover, and the lens assembly is provided at the opening to block the opening to form the sealing space. In this application, the wall of the housing disposed in the fluorescent emission direction is defined as a sealing cover.

Specifically, the lens assembly and the opening may be flexibly sized according to different lasers and corresponding wavelength conversion members, which is not limited herein. Specifically, the lens assembly may be fixedly connected to the housing in the opening in an airtight manner, or by gluing, etc., which is not limited herein.

In the first to sixth embodiments, the side of the base facing the opening may further be provided with a circuit layer, so that two electrodes of the laser are led out of the housing through the circuit layer; a circuit board can be paved on the base, a connecting circuit of the laser is arranged on the circuit board, and the circuit board is arranged between the laser and the shell wall of the shell; or the connection circuit of the laser is arranged in the heat sink so as to lead the electrode of the laser out of the shell, and the specific arrangement mode is not limited here.

Referring to fig. 7, fig. 7 is a schematic side sectional view of a seventh embodiment of a laser light source device of the present application.

In the present embodiment, the arrangement of the light source assembly 72 in the laser light source device 70 may be the same as any one of the first to sixth embodiments, and will not be described here.

Specifically, in the present embodiment, the housing 71 is in a U-shaped groove shape, the lens assembly 73 is fixedly connected to the side wall of the housing 71 through the opening 711 of the U-shaped groove, so that the housing 71 and the lens assembly 73 form a closed space, and the laser 721 is accommodated in the closed space.

In the first to sixth embodiments, the lens assembly for collecting outgoing light may be provided so as to be embedded in an opening of a wall of the housing on the opposite side of the base. In the present embodiment, the opening 711 may form a U-shaped groove structure with the first sidewall 71a, the second sidewall 71b, and the base 712 of the housing 71. Specifically, as shown in fig. 7, the lens assembly 73 may cover the opening 711 and be hermetically connected to the housing 71. The lens assembly 73 may be hermetically connected to a side of the first and second sidewalls 71a and 71b of the housing 71 facing away from the base 712, so as to block the opening 711 of the U-shaped groove structure. Further, the lens assembly 73 may be hermetically connected to the side of the first and second sidewalls 71a and 71b facing away from the base 712 by a sealing material. The material of the hermetic connection may be low temperature glass, or glue, or tin, or gold tin, without limitation. Specifically, when the airtight connection material is tin or Jin Xishi, the junction between the lens assembly 73 and the first and second sidewalls 71a and 71b may be plated with a solderable material such as nickel-gold, nickel-tin, etc. in advance to facilitate the fixed connection.

Further, in the present embodiment, a convex area 731 is disposed on a surface of the lens assembly 73 facing the base 712, and a perpendicular projection of the convex area 731 on the base 712 can cover the wavelength conversion member 722, so as to collect fluorescence excited by the wavelength conversion member 722. The surface of the lens assembly 73 away from the base 712 may be configured as an arc surface or a plane surface, which may be flexibly configured according to different light collection requirements, which is not limited herein.

In particular, in some specific application examples, the lens assembly may further be fixedly connected with the faces of the first and second sidewalls facing the light source assembly to form an airtight space with the housing.

Specifically, referring to fig. 8, fig. 8 is a schematic side sectional view of an eighth embodiment of the laser light source device of the present application.

In the present embodiment, the components and the arrangement of the light source unit 82 in the laser light source device 80 may be the same as those in the seventh embodiment, and the opening 811 and the housing 81 form a U-shaped groove structure. However, unlike the seventh embodiment, the lens assembly 83 may be fixedly coupled to the surface of the light source assembly 82 through the first and second sidewalls 81a and 81b of the housing 81. For example, as shown in fig. 8, the first side wall 81a and the second side wall 81b fixedly connected to the lens assembly 83 may each have an L-shaped structure, and in this embodiment, a surface of the lens assembly 83 facing the base 812 is defined as a bottom surface of the lens assembly 83, and a surface of the lens assembly 83 perpendicular to the bottom surface of the lens assembly 83 is defined as a side surface of the lens assembly 83. The steps formed by the first and second sidewalls 81a and 81b of the L-shaped structure may meet the bottom surface of the lens assembly 83, prevent the lens assembly 83 from moving toward the base 812, and may fill a sealing material between the side surface of the lens assembly 83 and the first and second sidewalls 81a and 81b, so that the lens assembly 83 and the housing 81 form a closed space. Sealing materials may be filled between the bottom surface of the lens assembly 83 and the first and second sidewalls 81a and 81b to achieve airtight connection between the lens assembly 83 and the housing 81, and the airtight connection may be made of the same materials as those in the seventh embodiment, which will not be described herein.

The arrangement of the two sides of the lens assembly 83 facing and away from the base 812 may be the same as that of the seventh embodiment, and the arrangement of the wavelength conversion element 822 and the laser 821 in the light source assembly 82 may be the same as that of the seventh embodiment, which is not repeated here.

Further, the lens assembly 83 may be fixedly connected to the surfaces of the first side wall 81a and the second side wall 81b away from the light source assembly 82, so that a sealed space is formed between the lens assembly 83 and the housing 81, which is not limited herein.

Through setting up opening and casing, base formation U type groove form structure, the lens subassembly covers the opening of U type groove form structure for casing and lens subassembly realize sealing connection more easily. And the lens component covers the opening of the U-shaped groove-shaped structure, so that more emergent fluorescence can be projected onto the lens component, and the light source utilization rate can be improved.

A light source system comprises the laser light source device of any embodiment, wherein the light source system can be a light source system for daily illumination or projection and comprises a projector, a stage lamp, a searchlight, a car lamp, a flashlight and the like.

The foregoing description is only of embodiments of the present application, and is not intended to limit the scope of the patent application, and all equivalent structures or equivalent processes using the descriptions and the contents of the present application or other related technical fields are included in the scope of the patent application.

Claims (12)

1. A laser light source device, comprising:

a housing, a light source assembly, and a lens assembly;

the light source assembly is arranged in the shell and comprises a laser and a wavelength conversion piece and is used for generating emergent rays; an opening is formed in one side of the shell, the lens component is arranged at the opening and is fixedly connected with the shell to block the opening to form a sealed space, and the lens component is used for collecting and transmitting the emergent light rays to form emergent light spots;

the shell comprises a base, the base is arranged on one side opposite to the opening, the wavelength conversion piece is fixedly connected with the base, and the wavelength conversion piece is arranged on one surface of the base, which faces the opening.

2. The laser light source device according to claim 1, wherein the housing includes a sealing cover, the opening is provided on the sealing cover, and the lens assembly is provided at the opening to block the opening to form a sealed space.

3. The laser light source device of claim 1, wherein the light source assembly comprises a heat sink fixedly connected to the laser and fixedly connected to a side of the base facing the opening.

4. The laser light source device according to claim 1, wherein the light source assembly includes a condenser lens disposed at a light emitting end of the laser for adjusting a divergence angle of the emitted light.

5. A laser light source device according to claim 3, wherein a surface of the heat sink facing away from the base is an inclined surface with a preset angle, the laser is fixedly connected to the inclined surface, the brewster angle of the incident surface medium of the wavelength conversion member is α, and the inclined angle of the inclined surface is such that the incident angle of the outgoing light on the wavelength conversion member is α -20 ° to α+10°.

6. The laser light source device according to claim 1, wherein the light source module includes a mirror, the brewster angle of the incident surface medium of the wavelength conversion member is α, the mirror is disposed obliquely at a preset angle, and the preset angle makes the incident angle of the outgoing light reflected by the mirror on the wavelength conversion member be α -20 ° to α+10°.

7. The laser light source device of claim 1, wherein the light source assembly includes a polarization rotator for converting the outgoing light into P-polarized light.

8. A laser light source device as claimed in claim 3, wherein the laser is disposed on a side of the heat sink perpendicular to the base such that the outgoing light projected onto the wavelength conversion member is P-polarized light.

9. The laser light source device according to claim 1, wherein the housing is in a shape of a U-shaped groove, and the lens assembly is fixedly connected with a side wall of the housing through an opening of the U-shaped groove, so that a sealed space is formed between the housing and the lens assembly.

10. The laser light source device according to claim 9, wherein a surface of the lens assembly facing the base is provided with a convex area, and a perpendicular projection of the convex area onto the base covers the wavelength conversion member.

11. A laser light source device as claimed in claim 3, wherein the light source assembly comprises a light guide of a predetermined length, the light guide is disposed at a light emitting end of the laser, an end surface of the light guide away from the laser is provided as a reflecting inclined surface, and the emitted light is reflected by the reflecting inclined surface and then projected onto the wavelength conversion member.

12. A light source system comprising the laser light source device of any one of claims 1 to 11.

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