CN113009753A

CN113009753A - Laser light source and laser projection equipment

Info

Publication number: CN113009753A
Application number: CN201911323873.5A
Authority: CN
Inventors: 赵云
Original assignee: Qingdao Hisense Laser Display Co Ltd
Current assignee: Qingdao Hisense Laser Display Co Ltd
Priority date: 2019-12-20
Filing date: 2019-12-20
Publication date: 2021-06-22
Also published as: WO2021121408A1

Abstract

The embodiment of the invention discloses a laser light source and laser projection equipment, and relates to the technical field of laser light sources. The device is used for solving the problem that the overall transmittance of the fluorescence of the first lens component in the laser light source of the related art is low. The laser light source comprises a shell, a laser, a light combining component, a first lens component and a fluorescent wheel, wherein the laser is borne on the shell and used for emitting first laser light, the light combining component, the first lens component and the fluorescent wheel are all arranged in the shell, the first lens component and the fluorescent wheel are both arranged on a light path of the first laser light, and the first lens component is positioned on one side of the fluorescent wheel, which is close to the laser; the fluorescent wheel is provided with a fluorescent reflection area, and the fluorescent reflection area is used for reflecting the fluorescent light generated by the excitation of the first laser to the light combining component; the light combination component is positioned on a light path of second laser formed after the first laser irradiates the fluorescent wheel and is used for combining and outputting the second laser and the fluorescent light; the optical axis of the first lens component and the optical axis of the first laser are arranged in a non-coaxial mode. The invention can be used in laser projection equipment.

Description

Laser light source and laser projection equipment

Technical Field

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

Background

In the technical field of projection display, a laser light source is used as a solid-state light source, and has a series of advantages of high brightness, high efficiency, long service life, good color gamut, environmental protection and the like, so that the laser light source becomes a choice of a new projection light source. Meanwhile, as projection display products gradually move from a meeting room to a family, laser projection products become a new consumer electronics product and are popular with consumers.

A laser light source in the related art, as shown in fig. 1, includes a fluorescence conversion system, where the fluorescence conversion system includes a light combining component 01, a laser 02 for emitting a first laser 021, and a lens component 03 and a fluorescent wheel 04 sequentially disposed on an optical path of the first laser 021 along an emitting direction of the first laser 021; the fluorescence wheel 04 is provided with a fluorescence reflection region, and the fluorescence reflection region is used for reflecting the fluorescence 041 generated by the excitation of the first laser 021 to the light combination component 01; lens assembly 03 is located in the optical path of fluorescence 041; the light combining component 01 is located on the optical path of the second laser beam 022 formed after the first laser beam 021 irradiates the fluorescence wheel 04, and is used for combining the second laser beam 022 and the fluorescence 041 and outputting the combined light.

The inventor of the application finds out through research that: in the fluorescence conversion system, the optical axis of the first laser 021 and the optical axis of the fluorescence 041 are coincident, and the energy density of the first laser 021 is high, so that after the first laser 021 passes through the lens assembly 03, the lens assembly 03 absorbs the first laser 021 at the position (especially at the position of the optical axis) where the first laser 021 passes through, the temperature is increased, the transmittance of the lens assembly 03 is reduced, a certain influence is caused on the passing of the fluorescence 041, and the overall transmittance of the fluorescence is reduced.

Disclosure of Invention

Embodiments of the present invention provide a laser light source and a laser projection apparatus, which are used to solve the problem of low overall transmittance of fluorescence of a lens assembly located on a front side of a fluorescence wheel in a laser light source in the related art.

In order to achieve the above object, in a first aspect, an embodiment of the present invention provides a laser light source, which includes a housing, a laser carried on the housing and used for emitting first laser light, and a light combining assembly, a first lens assembly, and a fluorescent wheel all disposed in the housing, where the first lens assembly and the fluorescent wheel are both disposed on a light path of the first laser light, and the first lens assembly is located on one side of the fluorescent wheel close to the laser; the fluorescent wheel is provided with a fluorescent reflection area, and the fluorescent reflection area is used for reflecting the fluorescent light generated by the excitation of the first laser to the light combination component; the first lens component is positioned on the optical path of the fluorescence; the light combination component is positioned on an optical path of second laser light formed after the first laser light irradiates the fluorescence wheel and is used for combining and outputting the second laser light and the fluorescence; the optical axis of the first lens assembly and the optical axis of the first laser are arranged in a non-coaxial mode, so that the optical axis of the first laser and the optical axis of the fluorescence are staggered on the first lens assembly.

In a second aspect, an embodiment of the present invention provides a laser projection apparatus, including an optical mechanical assembly, a projection lens, and the laser light source in the first aspect; the light combination component of the laser light source is used for outputting an illumination light beam formed by combining the second laser and the fluorescence to the optical mechanical component; the optical machine component is used for modulating the illumination light beams to form projection light beams, and projecting the projection light beams through the projection lens.

According to the laser light source and the laser projection equipment provided by the embodiment of the invention, the optical axis of the first lens component and the optical axis of the first laser are arranged in a non-coaxial manner, so that the optical axis of the first laser and the optical axis of the fluorescence are staggered on the first lens component, and therefore, the overlapping of the laser with high energy density at the optical axis of the first laser and the fluorescence at the optical axis of the fluorescence on the first lens component can be avoided, the reduction of the transmittance of the fluorescence with high energy density at the optical axis of the fluorescence due to higher temperature of the first lens component at the optical axis of the first laser can be avoided, and the improvement of the whole transmittance of the fluorescence of the first lens component is facilitated.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is an optical path diagram of a fluorescence conversion system of a laser light source in the related art;

FIG. 2 is an optical diagram of a fluorescence conversion system for a laser light source in some embodiments of the present invention;

FIG. 3 is an optical diagram of a fluorescence conversion system for a laser source in accordance with further embodiments of the present invention;

FIG. 4 is a schematic structural diagram of a laser light source according to an embodiment of the present invention after a top cover of a housing is removed;

FIG. 5 is a schematic structural view of the laser source of FIG. 4 with the dichroic filter and the color filter holder removed;

FIG. 6 is an exploded view of the laser light source of FIG. 5;

FIG. 7 is a schematic view of the laser source of FIG. 5 with a portion cut away in section A-A;

FIG. 8 is a partial exploded view of a lens adjustment block of the laser light source of FIG. 5;

FIG. 9 is a schematic view of a carrier of a lens adjustment stage according to an embodiment of the present invention;

FIG. 10 is a cross-sectional view A-A of the laser light source of FIG. 5;

FIG. 11 is a cross-sectional view B-B of the laser light source of FIG. 5;

FIG. 12 is a cross-sectional view C-C of the laser light source of FIG. 5;

FIG. 13 is a schematic view of a partial structure of a fluorescent wheel according to some embodiments of the present invention (the lens holder is fixed to the housing);

FIG. 14 is an exploded view of the fluorescence wheel and fluorescence wheel holder of FIG. 13;

FIG. 15 is a cross-sectional view D-D of FIG. 13;

FIG. 16 is a schematic structural diagram of a fluorescent wheel holder according to an embodiment of the present invention;

FIG. 17 is a schematic structural view of a fluorescent wheel holder assembled with a fluorescent wheel in an embodiment of the present invention;

FIG. 18 is a schematic view of a partial structure at a dichroic plate in accordance with certain embodiments of the present invention;

FIG. 19 is the first exploded view of FIG. 18;

FIG. 20 is an exploded view II of FIG. 18;

FIG. 21 is a cross-sectional view F-F of FIG. 18;

FIG. 22 is a cross-sectional view of E-E of FIG. 18;

fig. 23 is a schematic structural view of a color chip fixing seat in an embodiment of the invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; the specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In a first aspect, an embodiment of the present invention provides a laser light source, as shown in fig. 3 and fig. 4, including a housing 200, a laser carried on the housing 200 and used for emitting first laser light 11, and a light combining component 2, a first lens component 3, and a fluorescent wheel 4 all disposed in the housing 200; the first lens assembly 3 and the fluorescent wheel 4 are arranged on a light path of the first laser 11, and the first lens assembly 3 is positioned on one side of the fluorescent wheel 4 close to the laser 1; the fluorescence wheel 4 has a fluorescence reflection area 41 (as shown in fig. 4), and the fluorescence reflection area 41 is used for reflecting fluorescence 42 (shown by a dotted line in fig. 3) generated by the excitation of the first laser 11 onto the light combining component 2; the first lens component 3 is positioned on the light path of the fluorescence 42; the light combining component 2 is positioned on the light path of the second laser light 12 formed after the first laser light 11 irradiates the fluorescence wheel 4, and is used for combining the second laser light 12 and the fluorescence 42 and outputting the combined light; the optical axis (a-axis shown in fig. 3) of the first lens unit 3 is not arranged coaxially with the optical axis (b-axis shown in fig. 3) of the first laser light 11, so that the optical axis of the first laser light 11 is displaced from the optical axis (a-axis shown in fig. 3) of the fluorescent light 42 on the first lens unit 3.

The laser 11 may be disposed in the housing 200, or disposed on a sidewall of the housing 200, which is not limited herein.

According to the laser light source provided by the embodiment of the invention, the optical axis of the first lens assembly 3 and the optical axis of the first laser 11 are arranged in a non-coaxial manner, so that the optical axis of the first laser 11 and the optical axis of the fluorescence 42 are staggered on the first lens assembly 3, and therefore, the overlapping of the laser with high energy density at the optical axis of the first laser 11 and the fluorescence 42 at the optical axis of the fluorescence 42 on the first lens assembly 3 can be avoided, the reduction of the transmittance of the fluorescence 42 with high energy density at the optical axis of the fluorescence 42 due to higher temperature at the optical axis of the first laser 11 by the first lens assembly 3 can be avoided, and the improvement of the whole transmittance of the fluorescence 42 of the first lens assembly 3 is facilitated.

In the above embodiment, the optical path of the second laser 12 is not limited, for example, the optical path of the second laser 12 may be an optical path formed by the fluorescence wheel 4 reflecting the first laser 11, and specifically, as shown in fig. 3 and 4, the fluorescence wheel 4 has a laser reflection area 43, and the laser reflection area 43 is used for reflecting the first laser 11 to form the second laser 12; the first lens assembly 3 is positioned on the light path of the fluorescence 42 and the second laser 12; the optical axis (a-axis shown in fig. 3) of the first lens assembly 3 is not coaxially arranged with the optical axis (b-axis shown in fig. 3) of the first laser light 11, so that the optical axis of the first laser light 11, the optical axis (c-axis shown in fig. 3) of the second laser light 12, and the optical axis (a-axis shown in fig. 3) of the fluorescent light 42 are staggered on the first lens assembly 3 by two phases, that is: on the first lens assembly 3, the optical axis of the first laser 11 is staggered with the optical axis of the second laser 12, the optical axis of the first laser 11 is staggered with the optical axis of the fluorescence 42, and the optical axis of the second laser 12 is staggered with the optical axis of the fluorescence 42, so that the optical axis of the first laser 11, the optical axis of the second laser 12 and the optical axis of the fluorescence 42 are prevented from being overlapped on the first lens assembly 3, and the transmittance of the second laser 12 and the fluorescence 42 is influenced.

In addition, the optical path of the second laser light 12 may also be an optical path formed after the first laser light 11 transmits the fluorescence 42, specifically, as shown in fig. 2, the fluorescence wheel 4 has a laser transmission region for transmitting the first laser light 11 through the fluorescence wheel 4 to form the second laser light 12; the fluorescence conversion system 100 further includes a light path conversion component 5, and the light path conversion component 5 is configured to transmit the second laser 12 to the light combining component 2 to combine with the fluorescence 42. The optical path conversion member 5 includes a plurality of optical path conversion lenses 51 and a plurality of relay lenses 52, each of the optical path conversion lenses 51 and the relay lenses 52 being located on the optical path of the second laser light 12. Compared with the embodiment shown in fig. 2, in the embodiment shown in fig. 3, since the fluorescence 42 and the second laser 12 are both emitted along the front surface of the fluorescence wheel 4, the fluorescence 42 reflected from the fluorescence wheel 4 and the second laser 12 can be directly collected and combined by using the light combining component 2, and the light path conversion component 5 is not required to be arranged to guide the second laser 12 to the light combining component 2, so that the structure of the laser light source can be simplified, the reduction of the whole size is facilitated, and the miniaturization of the laser light source can be realized.

The first lens unit 3 is not limited to the above configuration, and for example, as shown in fig. 3, the first lens unit 3 may include a first convex lens 31 and a second convex lens 32 coaxially disposed, and the second convex lens 32 is located between the first convex lens 31 and the fluorescent wheel 4. The first convex lens 31 may be an aspheric convex lens, and the second convex lens 32 may be a spherical convex lens. In addition, the first lens unit 3 may be a single aspheric convex lens. Compared with an aspheric convex lens, the first convex lens 31 and the second convex lens 32 are arranged, so that the fluorescent light 42 with a larger divergence angle can be better collected; meanwhile, the first convex lens 31 and the second convex lens 32 are arranged to have low requirements for processing, so that cost reduction is facilitated (an aspheric convex lens is arranged, optical parameters which can receive a large divergence angle and can collimate the fluorescent light beam need to be designed, so that aspheric curvature requirements are high, design and processing difficulty is high, and cost is high).

As shown in fig. 3, a distance between the optical axis of the first lens component 3 and the optical axis of the first laser light 11 located upstream of the first lens component 3 (i.e., on the light incident side of the first lens component 3) is D, and an axial dimension of the first convex lens 31 is H;

if D is too large, the first laser beam 11 is irradiated to be close to the edge regions of the first convex lens 31 and the second convex lens 32, and since the thicknesses of the antireflection films plated on the first convex lens 31 and the second convex lens 32 are thicker in the middle and thinner in the edge, the first laser beam 11 passes through the edge region with the thinner plated film thickness, which is not beneficial to improving the transmittance of the first laser beam 11; if D is too small, the distance between the optical axis of the first laser 11 and the optical axis of the fluorescent light 42 is short, that is, the distance between the region of the first lens assembly 3 corresponding to the optical axis of the first laser 11 and the region corresponding to the optical axis of the fluorescent light 42 is short, and when the temperature of the region of the first lens assembly 3 corresponding to the optical axis of the first laser 11 is increased due to the irradiation of the first laser 11, the temperature of the region of the first lens assembly 3 corresponding to the optical axis of the fluorescent light 42 is easily affected, and further, the overall transmittance of the fluorescent light 42 is not further improved. The research shows that when D and H satisfy: when D is (0.3 to 0.7) H, the transmittance of the first laser beam 11 is improved by ensuring that the first laser beam 11 passes through a region where the coating thickness is thick, and the distance between the optical axis of the first laser beam 11 and the optical axis of the fluorescence 42 is prevented from being too short, which is advantageous for further improving the overall transmittance of the fluorescence 42.

Further studies have found that when D is (0.3 to 0.5) H, the transmittance of the first laser beam 11 can be further increased, and the overall transmittance of the fluorescence 42 can be further increased.

In order to achieve the purpose of efficiently exciting the fluorescence 42 and reduce the light loss of the first laser light 11 during transmission, as shown in fig. 3, the laser light source further includes a second lens assembly 6 located between the laser 1 and the first lens assembly 3, and the second lens assembly 6 is located in the optical path of the first laser light 11 and located between the laser 1 and the first lens assembly 3. Therefore, after the first laser 11 is emitted from the laser 1, the first laser 11 forms a smaller spot after beam shrinking by the second lens assembly 6 and then enters the surface of the fluorescent wheel 4, which not only reduces light loss of the first laser 11 in the transmission process, but also is beneficial to improving the energy density of the first laser 11 so as to improve the excitation efficiency of the fluorescence 42.

The composition of the second lens assembly 6 is not exclusive, and may be, for example, the following composition: as shown in fig. 3, the second lens assembly 6 includes a third convex lens 61, a concave lens 62, and a fly-eye lens 63 coaxially arranged, and the third convex lens 61, the concave lens 62, and the fly-eye lens 63 are arranged in order on the optical path of the first laser light 11 in the emission direction of the first laser light 11. In addition, the following composition may be also possible: the second lens unit 6 includes a third convex lens 61 and a concave lens 62 coaxially disposed, and the third convex lens 61 and the concave lens 62 are sequentially disposed on the optical path of the first laser light 11 along the emission direction of the first laser light 11. When the second lens assembly 6 includes the fly-eye lens 63, the fly-eye lens 63 is formed by a series of small lens combinations, and the uniformity and brightness of the first laser light 11 are improved when the first laser light 11 passes through the fly-eye lens 63.

In order to facilitate the output of the combined second laser light 12 and the fluorescence 42, as shown in fig. 2, the laser light source further includes a light-receiving component located on the optical path of the second laser light 12 and the fluorescence 42, the light-receiving component is located downstream of the light-combining component 2 and includes a fourth convex lens 7 and a light-receiving rod 8, the fourth convex lens 7 is located between the light-combining component 2 and the light-receiving rod 8 and is configured to converge the combined second laser light 12 and the fluorescence 42 to the light-receiving rod 8 and output the converged second laser light 12 and the fluorescence 42.

In the actual production and manufacturing of the laser light source, due to the existence of processing errors and installation errors, the optical axis of the first lens component 3 is easily deviated from the preset position of the fluorescence reflection area 41 of the fluorescence wheel 4, so that the light spot of the first laser 11 irradiated on the fluorescence reflection area 41 of the fluorescence wheel 4 is easily deviated from the preset position, thereby being not beneficial to the efficient excitation of the fluorescence 42. In order to solve this problem, as shown in fig. 5 and 6, the laser light source further includes a lens holder 310, the first lens assembly 3 is disposed on the lens holder 310, the lens holder 310 is located in the housing 200, and the position of the lens holder 310 relative to the housing 200 is adjustable along a direction perpendicular to the optical axis of the first lens assembly 3. When the light spot irradiated to the fluorescence reflection area 41 by the first laser 11 deviates from the preset position, the position of the lens fixing seat 310 relative to the housing 200 is adjusted along the direction perpendicular to the optical axis of the first lens assembly 3, so that the optical axis of the first lens assembly 3 coincides with the preset position of the fluorescence reflection area 41 of the fluorescence wheel 4, and thus the first laser 11 is irradiated to the preset position of the fluorescence reflection area 41, and the efficient excitation of the fluorescence 42 is ensured.

When the first lens component 3 includes the first convex lens 31 and the second convex lens 32, as shown in fig. 6, a lens mounting hole 311 is formed on the lens fixing base 310, the first convex lens 31 is fixed in the lens mounting hole 311 by the first mounting structure 312, and the second convex lens 32 is fixed in the lens mounting hole 311 by the second mounting structure 313;

as shown in fig. 6, the first mounting structure 312 includes a first mounting fastener 3121 (for example, a screw), a pressing ring 3122, a first fixing elastic sheet 3123, and a first step surface 3124 disposed in the lens mounting hole 311, an edge of the first convex lens 31 abuts against the first step surface 3124, the first fixing elastic sheet 3123 and the pressing ring 3122 are both sleeved on the first convex lens 31, the pressing ring 3122 is located between the first fixing elastic sheet 3123 and the first step surface 3124, the first fixing elastic sheet 3123 is connected to the first step surface 3124 through the first mounting fastener 3121, so as to fix the first convex lens 31 in the lens mounting hole 311;

as shown in fig. 6, the second mounting structure 313 includes a second mounting fastener 3131 (for example, a screw), a second fixing elastic sheet 3132, and a second step surface 3133 disposed in the lens mounting hole 311, an edge of the second convex lens 32 abuts against the second step surface 3133, the second fixing elastic sheet 3132 is sleeved on the first convex lens 31, and the second fixing elastic sheet 3132 is connected to the second step surface 3133 through the second mounting fastener 3131, so as to fix the second convex lens 32 in the lens mounting hole 311.

The adjusting structure of the lens holder 310 may be as follows: as shown in fig. 7, the laser light source further includes a lens adjusting base 320 located in the housing 200, the lens adjusting base 320 includes a base 321 and a bearing 322 disposed on the base 321; the bearing member 322 is connected to the base 321 through the first adjusting structure 330, so that the position of the bearing member 322 relative to the base 321 can be adjusted along a first direction X, where the first direction X is a direction perpendicular to the optical axis of the first lens assembly 3; the lens holder 310 is supported by the supporting member 322 and connected to the supporting member 322 through the second adjusting structure 340, so that the position of the lens holder 310 relative to the supporting member 322 can be adjusted along a second direction Y, which is a direction perpendicular to the optical axis of the first lens assembly 3 and the first direction X.

During adjustment, the position of the lens holder 310 in the second direction Y relative to the housing 200 can be adjusted by the second adjusting structure 340, and the position of the carrier 322 in the housing 200 can be adjusted by the first adjusting structure 330, so as to drive the adjustment of the position of the lens holder 310 in the first direction X relative to the housing 200. By adjusting the position of the lens fixing base 310 relative to the housing 200 in two directions (i.e., the first direction X and the second direction Y), the adjusting efficiency and the adjusting precision of the lens fixing base 310 are greatly improved, and the optical axis of the first lens component 3 can be more accurately coincided with the preset position of the fluorescence reflection area 41 of the fluorescence wheel 4. Meanwhile, since the seat 321 of the lens adjusting seat 320 and the bearing 322 are both in the housing 200, when adjusting, the housing 200 can be opened to adjust without changing the placement position of the housing 200 (if the adjusting structure is disposed on the wall of the housing 200 where the lens fixing seat 310 is located, for example, on the bottom wall of the housing 200 shown in fig. 7, the housing 200 needs to be turned over during adjustment, so that the adjustment is inconvenient), thereby greatly facilitating the position adjustment of the lens fixing seat 310.

The first adjusting structure 330 is not exclusive, and for example, the first adjusting structure 330 may be as follows: as shown in fig. 8 and 10, the first regulating structure 330 includes: a first threaded hole 331 opened in the base 321; a first waist-shaped hole 332 formed in the carrier 322, wherein a length direction of the first waist-shaped hole 332 is parallel to the first direction X; a first fastener 333 (which may be a screw, for example) having a shaft and a head, the shaft of the first fastener 333 passing through the first kidney-shaped hole 332 to be connected with the first threaded hole 331. During adjustment, the first fastening member 333 is loosened (for example, the first fastening member 333 is screwed into the first threaded hole 3312 circles only), the supporting member 322 is adjusted along the first direction X to reach a predetermined position in the first direction X, and after the adjustment is completed, the first fastening member 333 is tightened to lock the supporting member 322 on the seat 321.

In addition, the first adjustment structure 330 may also be as follows: the first adjusting mechanism 330 includes: a first adjusting screw rotatably disposed on the base 321, the first adjusting screw extending along the first direction X; a first adjusting nut fixedly disposed on the carrier 322; the first adjusting nut is sleeved on the first adjusting screw rod. During adjustment, the first adjusting screw is rotated, the first adjusting nut drives the bearing piece 322 to move along the first direction X, and the first adjusting screw stops rotating after reaching a preset position in the first direction X. In contrast to embodiments in which the first adjustment structure 330 includes a first adjustment screw and a first adjustment nut, embodiments in which the first adjustment structure 330 includes the first fastener 333 do not require the use of an expensive screw, thereby facilitating a reduction in manufacturing costs; meanwhile, after the adjustment is completed, the fastener is locked with the seat 321, so that the bearing member 322 is prevented from moving in the first direction X, and the adjustment precision is ensured.

In order to make the movement of the carrier 322 more smooth during the adjustment of the carrier 322 in the first direction X, as shown in fig. 9 and 10, the first adjustment structure 330 further includes: a first guide post 3211 disposed on the seat 321; a second waist-shaped hole 3221 formed in the carrier 322, wherein a length direction of the second waist-shaped hole 3221 is parallel to the first direction X; the first guiding column 3211 is slidably engaged with the second waist-shaped hole 3221. During the adjustment of the carrier 322 in the first direction X, the first guiding post 3211 slides along the second waist-shaped hole 3221 to guide the carrier 322, so that the carrier 322 moves more smoothly.

As shown in fig. 10, the number of the second waist-shaped holes 3221 may be two, two second waist-shaped holes 3221 are opened on the carrier 322 along the first direction X, the number of the first guiding columns 3211 may be two, the two first guiding columns 3211 are both disposed on the lens fixing base 310, and each first guiding column 3211 is in sliding fit with the corresponding second waist-shaped hole 3221.

Of course, the positions of the first guiding column 3211 and the second waist-shaped hole 3221 may also be interchanged, that is: the first guiding post 3211 is disposed on the supporting member 322, and the second waist-shaped hole 3221 is disposed on the base 321. The technical effects obtained after and before the exchange of the arrangement positions of the first guiding column 3211 and the second waist-shaped hole 3221 are the same, and are not described herein again.

The second adjustment structure 340 is also not exclusive, for example the second adjustment structure 340 may be as follows: as shown in fig. 8 and 10, the second regulating structure 340 includes: a through hole 341 opened in the carrier 322; a second threaded hole 342 formed in the lens holder 310; a second fastening member 343 having a shaft and a head, the shaft of the second fastening member 343 passing through the through hole 341 to be coupled with the second screw hole 342; and an elastic member 344 disposed between the carrier 322 and the lens holder 310, wherein the elastic member 344 is used for applying an elastic force to the lens holder 310 along the second direction Y and in a direction away from the carrier 322. The head of the second fastening member 343 can be kept clamped with the edge of the through hole 341 by the elastic force, so that the lens fixing seat 310 is prevented from being adjusted in the second direction Y due to the play of the second fastening member 343 in the axial direction. During adjustment, the second fastening member 343 is screwed, so that the lens holder 310 moves relative to the second fastening member 343 by a predetermined position in the second direction Y. After the adjustment is completed, in order to improve the stability of the first fastening member 333 and the second fastening member 343, the first fastening member 333 and the second fastening member 343 may be fixed by dispensing.

In addition, the second adjustment structure 340 may also be as follows: the second regulating structure 340 includes: a second adjusting screw rotatably disposed on the bearing 322, the second adjusting screw extending along the second direction Y; a second adjusting nut fixedly disposed on the lens fixing base 310; the second adjusting nut is sleeved on the second adjusting screw rod. During adjustment, the second adjusting screw rod is rotated, the second adjusting nut drives the lens fixing seat 310 to move along the second direction Y, and the second adjusting screw rod stops rotating after reaching a preset position in the second direction Y. Compared with the embodiment in which the second adjusting structure 340 includes the second adjusting screw and the second adjusting nut, the embodiment in which the second adjusting structure 340 includes the second fastening member 343 and the elastic member 344 does not require an expensive screw, thereby facilitating reduction of manufacturing cost.

In an embodiment that the second adjustment structure 340 includes the second fastening member 343 and the elastic member 344, the elastic member 344 may be a spring, an elastic sheet, or the like, and is not limited herein.

When the elastic element 344 is a spring, to facilitate the installation of the spring, as shown in fig. 10, the lens holder 310 has a mounting post 314, the second threaded hole 342 is opened on the mounting post 314, the spring is sleeved on the mounting post 314, and one end of the spring abuts against the carrier 322 and the other end abuts against the lens holder 310. By sleeving the spring on the mounting post 314, the mounting and positioning of the spring are facilitated, and the stability of the spring in the compression process is ensured.

In the second adjusting structure 340, as shown in fig. 10, the number of the through holes 341 is two, and the through holes are spaced apart from each other along the first direction X and disposed on the carrier 322, the number of the second threaded holes 342 is two, both the two second threaded holes 342 are disposed on the lens holder 310, the number of the second fasteners 343 is two, and each of the second fasteners 343 passes through the corresponding through hole 341 and is connected to the corresponding second threaded hole 342.

In order to make the lens holder 310 move more smoothly during the adjustment of the lens holder 310 along the second direction Y, as shown in fig. 10, the second adjustment structure 340 further includes: a second guiding pillar 345 disposed on the lens holder 310; a guide hole 346 opened on the carrier 322, the guide hole 346 extending in the second direction Y; the second guide posts 345 are slidably engaged with the guide holes 346. During the adjustment of the lens holder 310 in the second direction Y, the second guide posts 345 slide along the guide holes 346 to guide the lens holder 310, so that the lens holder 310 moves more smoothly.

Of course, the positions of the second guiding studs 345 and the guiding holes 346 can be interchanged, that is: the second guiding posts 345 are disposed on the supporting member 322, and the guiding holes 346 are disposed on the lens holder 310. The positions of the second guiding posts 345 and the guiding holes 346 are the same after and before the exchange, and the description thereof is omitted.

In order to better balance the lens holder 310 in the first direction X, as shown in fig. 8 and 10, the holder 321 includes two sub-holders 3212 spaced apart along the first direction X, the carrier 322 is located on top of the two sub-holders 3212 and is connected to the two sub-holders 3212 through the first adjusting structure 330, respectively, the lens holder 310 is disposed between the two sub-holders 3212, and the top is connected to the carrier 322 through the second adjusting structure 340. Since the carrier 322 is connected to the two sub-mounts 3212 through the first adjustment structures 330, the carrier 322 can be better balanced in the first direction X, and thus the lens holder 310 can be better balanced in the first direction X. Meanwhile, the lens fixing base 310 is disposed between the two sub-bases 3212, so that the layout of the lens fixing base 310 and the lens adjusting base 320 is more compact, which is beneficial to reducing the space occupied in the housing 200.

The top of the sub-base 3212 specifically refers to an end of a housing wall (the bottom wall 210 of the housing 200 shown in fig. 7) on the sub-base 3212, which is away from the sub-base 3212, for example, the upper portion of the sub-base 3212 shown in fig. 7; the top of the lens holder 310 refers to an end of the lens holder 310 away from a housing wall on which the sub-holder 3212 is disposed, such as an upper portion of the lens holder 310 shown in fig. 7.

In order to ensure the precision of the adjustment, as shown in fig. 10, the fitting gap1 between the second guide pillar 345 and the guide hole 346 has a value ranging from 0.03mm to 0.05 mm. As shown in fig. 10, the value of the gap value gap2 between the carrier 322 and the lens holder 310 needs to be designed according to the actual up-down adjustment requirement, and the designed value needs to be 0.1mm larger than the preset adjustment value to absorb a certain adjustment tolerance;

as shown in fig. 10 and 12, a gap value gap3 between one of the first guiding columns 3211 (for example, the right first guiding column 3211 shown in fig. 10) and the mating second waist-shaped hole 3221 is set according to an actual adjustment requirement in the first direction X, and the gap3 needs to be 0.1mm larger than the required adjustment requirement to absorb a certain adjustment tolerance; the gap value gap4 between the other first guiding column 3211 (for example, the first guiding column 3211 on the left side in fig. 10) and the matching second waist-shaped hole 3221 is greater than that of the gap3 by 0.1mm, that is, the gap4 is equal to gap3+0.1mm, so that the adjustment tolerance can be better absorbed; as shown in fig. 10, the gap5 between the supporting member 322 and the bottom plane of the mounting post 314 is set in consideration of both the adjustment requirement of the lens holder 310 in the second direction Y and the extreme compression value of the elastic member 344.

As shown in fig. 11, which shows a schematic view of the fit between the first guiding column 3211 and the second waist-shaped hole 3221 along the axial direction of the first lens assembly 3, the size of the fit gap1 between the first guiding column 3211 and the second waist-shaped hole 3221 is in the range of 0.03mm to 0.05 mm.

In the actual manufacturing of the laser light source, the distance between the first lens assembly 3 and the fluorescent wheel 4 is usually different from the preset distance along the axial direction of the fluorescent wheel 4, so that the light spot irradiated by the first laser 11 to the fluorescent reflection area 41 of the fluorescent wheel 4 deviates from the preset size, thereby being not beneficial to the efficient excitation of the fluorescent light 42, and in order to solve this problem, as shown in fig. 13 and 14, the laser light source further includes a fluorescent wheel fixing seat 410, the fluorescent wheel 4 is disposed on the fluorescent wheel fixing seat 410, the fluorescent wheel fixing seat 410 is located in the housing 200, and the position of the fluorescent wheel fixing seat 410 relative to the housing 200 along the axial direction of the fluorescent wheel 4 is adjustable. When the distance between the fluorescent wheel 4 and the first lens assembly 3 deviates from the preset distance, the position of the fluorescent wheel fixing seat 410 relative to the housing 200 is adjusted along the axial direction of the fluorescent wheel 4, so that the distance between the fluorescent wheel 4 and the first lens assembly 3 reaches the preset distance, and thus the light plate irradiated to the fluorescent reflection area 41 by the first laser 11 can meet the requirement, and the efficient excitation of the fluorescence 42 is ensured.

As shown in fig. 14 and 15, the fluorescent wheel 4 is connected to the fluorescent wheel fixing base 410 through a fluorescent wheel fixing fastener 420 (such as a screw), specifically, a mounting through hole 411 is formed in the fluorescent wheel fixing base 410, and the fluorescent wheel fixing fastener 420 passes through the mounting through hole 411 to be connected to the fluorescent wheel 4. In order to improve the stability of the fluorescent wheel 4, after the fluorescent wheel fixing fastener 420 is connected with the fluorescent wheel fixing base 410, the fluorescent wheel fixing fastener 420 may be fixed by dispensing.

Shown in fig. 13 are: in an embodiment in which the lens holder 310 is fixedly connected to the housing 200 and the position of the fluorescent wheel holder 410 relative to the housing 200 along the axial direction of the fluorescent wheel 4 is adjustable, it is needless to say that the fluorescent wheel holder 410 may be fixed to the housing 200 and the position of the lens holder 310 relative to the housing 200 along the axial direction of the fluorescent wheel 4 may be adjustable; it can also be arranged that: along the axial direction of the fluorescent wheel 4, the position of the lens fixing seat 310 relative to the housing 200 and the position of the fluorescent wheel fixing seat 410 relative to the housing 200 can be adjusted, so that the purpose of adjusting the distance between the first lens component 3 and the fluorescent wheel 4 can be achieved.

The adjustment structure of the fluorescent wheel holder 410 may be as follows: as shown in fig. 14 and 15, the laser light source further includes a fluorescent wheel adjusting seat 430 located in the housing 200, and the fluorescent wheel fixing seat 410 is connected to the fluorescent wheel adjusting seat 430 through an axial adjusting structure 440, so that the position of the fluorescent wheel fixing seat 410 relative to the fluorescent wheel adjusting seat 430 along the axial direction of the fluorescent wheel 4 can be adjusted. Because fluorescence wheel fixing base 410 and fluorescence wheel adjustment seat 430 are all in casing 200, when adjusting, open casing 200 and all can adjust through axial adjustment structure 440, need not to change the place of casing 200 (if will adjust the structure and set up on the casing 200 wall at fluorescence wheel fixing base 410 place, for example on the diapire of the casing 200 that fig. 14 shows, need to overturn casing 200 during the regulation, make the regulation inconvenient) to the position control of fluorescence wheel fixing base 410 has been made things convenient for greatly.

The axial adjustment structure 440 is not exclusive, and for example, the axial adjustment structure 440 may be as follows: as shown in fig. 14 and 15, the axial adjustment structure 440 includes: an axial adjusting threaded hole 441 formed in the fluorescent wheel adjusting seat 430; an axial adjusting waist-shaped hole 442 arranged on the fluorescent wheel fixing seat 410, wherein the length direction of the axial adjusting waist-shaped hole 442 is parallel to the axial direction of the fluorescent wheel 4; an axial adjustment fastener 443 having a shaft portion and a head portion, the shaft portion of the axial adjustment fastener 443 passing through the axial adjustment kidney bore 442 and being coupled with the axial adjustment threaded bore 441. During adjustment, the axial adjustment fastener 443 is loosened, the laser 1 is turned on, the optical path of the first laser 11 and the size of the light spot irradiated on the fluorescent wheel 4 are observed, then the position of the fluorescent wheel fixing seat 410 relative to the housing 200 is adjusted, when the optical path of the first laser 11 and the light spot irradiated on the fluorescent wheel 4 meet requirements, the adjustment is finished, and then the axial adjustment fastener 443 is tightened to lock the fluorescent wheel fixing seat 410 on the fluorescent wheel adjusting seat 430. To ensure the stability of the fluorescent wheel holder 410 after adjustment, the axial adjustment fastener 443 may be fixed in place.

In addition, the axial adjustment structure 440 may also be as follows: the axial adjustment structure 440 includes: a third adjusting screw rod rotatably disposed on the fluorescent wheel adjusting base 430, the third adjusting screw rod extending along the axial direction of the fluorescent wheel 4; a third adjusting nut fixedly disposed on the fluorescent wheel fixing base 410; the third adjusting nut is sleeved on the third adjusting screw rod. During adjustment, the laser 1 is opened, the light path of the first laser 11 and the size of the light spot irradiated on the fluorescent wheel 4 are observed, then the third adjusting screw is rotated, the third adjusting nut drives the fluorescent wheel fixing seat 410 to move along the axial direction of the fluorescent wheel 4, when the light path of the first laser 11 and the light spot irradiated on the fluorescent wheel 4 meet requirements, the third adjusting screw is stopped from rotating, and adjustment is finished. Compared with the embodiment that the axial adjusting structure 440 includes the third adjusting screw and the third adjusting nut, the embodiment that the third adjusting structure includes the axial adjusting fastener 443 does not need to use an expensive screw, thereby being beneficial to reducing the manufacturing cost; meanwhile, after the adjustment is finished, the fluorescent wheel fixing seat 410 can be prevented from moving in the axial direction of the fluorescent wheel 4 by locking the fluorescent wheel adjusting seat 430 through a fastening piece, so that the adjustment precision is ensured.

In order to make the movement of the fluorescent wheel holder 410 more stable during the axial adjustment of the fluorescent wheel holder 410 along the fluorescent wheel 4, as shown in fig. 15, the axial adjustment structure 440 further includes: a guide cylinder 444 disposed on the fluorescent wheel adjustment seat 430; a guide long hole 445 opened on the fluorescent wheel fixing seat 410, wherein the length direction of the guide long hole 445 is parallel to the axial direction of the fluorescent wheel 4; the guide cylinder 444 is slidably fitted with the guide long hole 445. During the adjustment of the fluorescent wheel holder 410 in the axial direction of the fluorescent wheel 4, the guide cylinder 444 slides along the guide long hole 445 to guide the fluorescent wheel holder 410, so that the fluorescent wheel holder 410 moves more stably.

Of course, the positions of the guiding column 444 and the guiding long hole 445 can be interchanged, that is: the guiding column 444 is disposed on the fluorescent wheel fixing base 410, and the guiding slot 445 is opened on the fluorescent wheel adjusting base 430. The arrangement positions of the guide cylinder 444 and the guide slot 445 are the same after and before the exchange, and the description thereof is omitted.

In order to adjust the fluorescent wheel fixing base 410 conveniently, as shown in fig. 16, a fluorescent wheel adjusting handle 412 is further disposed on the fluorescent wheel fixing base 410, and during adjustment, an operator can adjust the fluorescent wheel fixing base 410 by grasping the fluorescent wheel adjusting handle 412, so that the fluorescent wheel fixing base 410 can be adjusted more conveniently.

In order to avoid the over-temperature of the fluorescent wheel 4 during the actual operation process, as shown in fig. 17, the laser light source further includes a temperature sensor 450, and the temperature sensor 450 is disposed on the fluorescent wheel fixing base 410 and is used for detecting the temperature of the fluorescent wheel 4. Thus, the temperature sensor 450 can feed back the temperature of the fluorescent wheel 4 to the control system, and when the temperature of the fluorescent wheel 4 is too high, the control system can avoid the temperature of the fluorescent wheel 4 from being too high through corresponding actions, such as turning off the laser 1, so as to prolong the service life of the fluorescent wheel 4.

In order to keep the fluorescent wheel fixing base 410 in a better balance in the first direction X, as shown in fig. 15, the fluorescent wheel adjusting base 430 includes two sub-adjusting bases 431 spaced apart along the first direction X, and the first direction X is a direction perpendicular to both the axial direction of the fluorescent wheel 4 and the height direction of the fluorescent wheel fixing base 410; the fluorescent wheel fixing seat 410 comprises a fixing seat body 413 and an adjusting piece 414 fixed on the top of the fixing seat body 413, and the fluorescent wheel 4 is arranged on the fixing seat body 413; the fixed base 413 is disposed between the two sub-adjusting bases 431, and the adjusting member 414 is connected to the two sub-adjusting bases 431 through the axial adjusting structure 440. Since the adjusting member 414 is connected to the two sub-adjusting seats 431 through the axial adjusting structures 440, the adjusting member 414 can be better balanced in the first direction X, and thus the fluorescent wheel fixing seat 410 can be better balanced in the first direction X. Meanwhile, the fixing base 413 is disposed between the two sub-adjusting bases 431, so that the layout of the fluorescent wheel fixing base 410 and the fluorescent wheel adjusting base 430 is more compact, and the space occupation in the housing 200 is reduced.

In order to ensure the accuracy of the adjustment, as shown in fig. 15, the gap value gap6 between the guide cylinder 444 and the guide long hole 445 in the first direction X is in the range of 0.03mm to 0.05 mm; the axial gap value of the fluorescent wheel 4 needs to be increased by 0.1mm on the basis of the adjustment required value so as to better absorb the adjustment tolerance of the fluorescent wheel fixing seat 410 in the axial direction of the fluorescent wheel 4.

In the laser light source provided in the embodiment of the present invention, the light combining component 2 may include a component of the dichroic sheet 21, or may also include a light combining prism, which is not specifically limited herein.

In the embodiment where the light combining component 2 may include the dichroic sheet 21, as shown in fig. 2 and fig. 3, along the emitting direction of the first laser light 11, the dichroic sheet 21, the first lens component 3, and the fluorescent wheel 4 are sequentially disposed on the optical path of the first laser light 11, that is: the dichroic sheet 21 is disposed between the laser 11 and the first lens assembly 3 and is located on the optical path of the first laser light 11 and the fluorescent light 42, and specifically, the dichroic sheet 21 is disposed between the second lens assembly 6 and the first lens assembly 3.

In the embodiment where the light combining component 2 includes the dichroic sheet 21 and the fluorescent wheel 4 includes the laser reflection area 43, in order to combine the second laser light 12 with the fluorescent light 42 and output the combined light, as shown in fig. 3, the light combining component 2 further includes a reflection member 22 located on the optical path of the second laser light 12, and along the optical path of the second laser light 12, the reflection member 22 is located on the side of the dichroic sheet 21 away from the fluorescent wheel 4 and is used for reflecting the second laser light 12 to the dichroic sheet 21 to combine with the fluorescent light 42. The second laser beam 12 passes through the dichroic plate 21, is irradiated onto the reflecting member 22, is reflected by the reflecting member 22 onto the dichroic plate 21, is combined with the fluorescent light 42, and is output. By providing the reflector 22, the reflector 22 changes the emission direction of the second laser beam 12, so that the emission direction of the second laser beam 12 matches the emission direction of the fluorescent light 42, and combines the two to output.

In order to make the optical axis of the second laser light 12 after exiting the dichroic plate 21 parallel to the optical axis of the fluorescent light 42, as shown in fig. 3, the reflecting member 22 is a reflecting plate parallel to the dichroic plate 21. By such an arrangement, the included angle between the reflective sheet and the optical axis of the incident second laser light 12 and the included angle between the dichroic sheet 21 and the optical axis of the incident fluorescent light 42 are the same, so that the reflected second laser light 12 and the fluorescent light 42 are parallel to each other, which can prevent the second laser light 12 and the fluorescent light 42 from being dispersed, thereby facilitating the collection of the second laser light 12 and the fluorescent light 42 by the downstream light-collecting component (such as the light-collecting lens 7 and the light rod 8 shown in fig. 3).

In the laser light source, the angle between the dichroic plate 21 and the optical axis of the first laser light 11 and the pitch angle of the dichroic plate 21 relative to the first wall 210 are two important parameters directly related to the direction of the dichroic plate 21 reflecting the fluorescent light 42, and in the actual manufacturing and production process of the laser light source, there is usually an error in the installation and fixation of the dichroic plate 21, so that the angle between the dichroic plate 21 and the optical axis of the first laser light 11 and the pitch angle of the dichroic plate 21 relative to the first wall 210 deviate from a preset value, and in order to reduce the influence of the deviation on the direction of the dichroic plate 21 reflecting the fluorescent light 42, as shown in fig. 18 and 19, the laser light source further includes a color plate fixing seat 510, the dichroic plate 21 is disposed on the color plate fixing seat 510, the color plate fixing seat 510 is disposed in the housing 200 and movably disposed on the first wall 210 of the housing 200, so that the angle between the dichroic plate 21 and the optical axis of the first laser light 11, And the pitch angle of the dichroic sheet 21 with respect to the first wall 210. When the included angle and the pitch angle deviate from the preset value, the relative position between the color chip fixing seat 510 and the housing 200 is adjusted to eliminate the deviation between the included angle and the pitch angle from the preset value, so as to ensure that the fluorescence 42 reflected by the dichroic chip 21 is emitted along the preset path.

As shown in fig. 20, in the embodiment that the light combining assembly 2 includes the reflective member 22, the reflective member 22 is also disposed on the color plate fixing base 510 and fixed opposite to the dichroic plate 21.

As shown in fig. 20, the dichroic filter 21 is fixed to the color filter fixing base 510 by a color filter fixing elastic piece 530 and a color filter fixing fastener 540 (e.g., a screw).

The adjustment structure of the color chip holder 510 may be as follows: as shown in fig. 19 and 21, the laser light source further includes a color patch adjusting seat 520, the color patch adjusting seat 520 is located in the housing 200 and is disposed on the first wall 210; the color chip fixing base 510 is rotatably connected with the first wall 210 through a rotating shaft 211; the color chip fixing base 510 is connected with the color chip adjusting base 520 through the rotation adjusting structure 550, so that the color chip fixing base 510 can rotate around the rotation axis 211 to adjust the size of the laser incident angle; the color filter fixing base 510 is further connected to the color filter adjusting base 520 through the pitching adjusting structure 560, so that the color filter fixing base 510 can pitch relative to the first wall 210 to adjust the pitch angle. Because color chip fixing seat 510 and color chip adjusting seat 520 are both in housing 200, when adjusting, it can adjust to open housing 200 like this, need not to change the place of housing 200 (if will adjust the structure and set up on the housing 200 wall that color chip fixing seat 510 is located, for example on the diapire of the housing 200 shown in fig. 19, need to overturn housing 200 during the adjustment for it is inconvenient to adjust), thereby made things convenient for the position control of color chip fixing seat 510 greatly.

The rotation adjustment structure 550 is not exclusive, for example, the rotation adjustment structure 550 may be as follows: as shown in fig. 19 and 21, the rotation adjusting structure 550 includes: a rotary adjusting threaded hole 551 formed in the color chip adjusting seat 520; the depth directions of the rotary adjusting threaded hole 551 and the rotary adjusting waist-shaped hole 552 are parallel to the extending direction of the rotating shaft 211; and a rotation-adjusting fastener 553 having a shaft portion and a head portion, the shaft portion of the rotation-adjusting fastener 553 passes through the rotation-adjusting waist-shaped hole 552, is coupled with the rotation-adjusting threaded hole 551, and when the color chip holder 510 rotates about the rotation axis 211, a relative movement between the shaft portion of the rotation-adjusting fastener 553 and the rotation-adjusting waist-shaped hole 552 may occur along a length direction of the rotation-adjusting waist-shaped hole 552. During adjustment, the color chip holder 510 is rotated around the rotation axis 211, and the change of the optical path of the fluorescent light 42 is observed, and after the optical path of the fluorescent light 42 meets the requirement, the adjustment is completed, and then the rotation adjusting fastener 553 is tightened. In order to improve the stability of the rotation adjusting fastener 553, after the adjustment is completed, the rotation adjusting fastener 553 may be fixed by dispensing.

In addition, the rotation adjustment structure 550 may also be as follows: the rotation adjustment structure 550 includes: a motor disposed on the color filter adjusting seat 520, and an output shaft of the motor is parallel to the rotating shaft 211; a rotating wheel fixed on the output shaft of the motor; and a connecting rod connected between the color chip fixing seat 510 and the rotating wheel, wherein the connecting rod, the color chip fixing seat 510 and the rotating wheel form a crank rocker mechanism. During adjustment, the motor drives the color chip fixing seat 510 to swing around the rotating shaft 211 through the rotating wheel and the connecting rod, and after the light path of the fluorescence 42 meets the requirement, the motor stops working, and the adjustment is finished. Compare the embodiment that rotation regulation structure 550 includes motor, runner, connecting rod, rotation regulation structure 550 includes the embodiment of rotation regulation fastener 553, and the part is few, and simple structure need not parts such as motor, is favorable to reduce cost.

In the process of rotationally adjusting the color chip holder 510, in order to make the color chip holder 510 rotate more smoothly, as shown in fig. 19, 21 and 23, the rotational adjustment structure 550 further includes: a rotation adjustment guide post 554 disposed on the color chip adjustment seat 520; a rotary guide slot 555 arranged on the color chip fixing seat 510; the rotation adjustment guide post 554 is slidably fitted into the rotation guide slot 555. In the process of the rotation adjustment of the color chip holder 510, the rotation adjustment guide post 554 slides along the rotation guide long hole 555 to guide the color chip holder 510, so that the color chip holder 510 rotates more stably around the rotation shaft 211.

Of course, the positions of the rotation adjustment guide post 554 and the rotation guide slot 555 can be interchanged, that is: the rotation adjusting guide post 554 is disposed on the color chip fixing seat 510, and the rotation guiding slot 555 is disposed on the color chip adjusting seat 520. The technical effects of the arrangement positions of the rotation adjusting guide post 554 and the rotation guide slot 555 after and before the exchange are the same, and are not described herein again.

Pitch adjustment structure 560 is also not unique, and may be, for example, the following: as shown in fig. 19 and 22, the pitch adjustment structure 560 includes: a pitch adjustment screw hole 561 opened in the color plate fixing base 510, a depth direction of the pitch adjustment screw hole 561 being parallel to an extending direction of the rotation shaft 211, and the pitch adjustment screw hole 561 being located at one side of the dichroic plate 21 in a thickness direction of the dichroic plate 21; a pitch adjuster 562 (e.g., an adjusting screw), the pitch adjuster 562 being engaged with the pitch adjusting screw hole 561, and one end thereof abutting against the color patch adjustment base 520. During adjustment, the pitching adjusting element 562 is rotated to apply a moment to the color chip holder 510, so that the color chip holder 510 performs pitching motion relative to the first wall 210, and the change of the optical path of the fluorescent light 42 is observed, and after the optical path of the fluorescent light 42 meets the requirement, the adjustment is finished. To improve the stability of the pitch adjusters 562, the rotating pitch adjusters 562 may be glued and fixed after adjustment is complete.

As shown in fig. 19, when the color chip fixing base 510 performs rotation adjustment around the rotation shaft 211, in order to better limit the movement of the pitching adjusting member 562 relative to the color chip adjusting base 520, the pitching adjusting structure 560 further includes a limiting groove 563 disposed on the color chip adjusting base 520, and one end of the pitching adjusting member 562 extends into the limiting groove 563 and abuts against the groove bottom of the limiting groove 563. Thus, the limiting groove 563 limits the range of motion of the pitch adjuster 562 with respect to the patch adjuster bracket 520.

In addition, pitch adjustment structure 560 may also be as follows: pitch adjustment structure 560 includes: a pitch adjustment screw hole 561 opened in the color chip adjustment holder 520, the depth direction of the pitch adjustment screw hole 561 being perpendicular to the extending direction of the rotating shaft 211, and the pitch adjustment screw hole 561 being located on one side of the color chip holder 510 in the thickness direction of the dichroic chip 21; the pitching adjusting piece 562, the pitching adjusting piece 562 and the pitching adjusting threaded hole 561 are matched, and one end of the pitching adjusting piece is abutted against the color chip adjusting seat 520. During adjustment, the pitching adjusting element 562 is rotated to apply a moment to the color chip holder 510, so that the color chip holder 510 performs pitching motion relative to the first wall 210, and the change of the optical path of the fluorescent light 42 is observed, and after the optical path of the fluorescent light 42 meets the requirement, the adjustment is finished.

In order to ensure that the color chip holder 510 can perform a pitching motion relative to the first wall 210, as shown in fig. 19, the rotating shaft 211 is disposed on the first wall 210, and the color chip holder 510 is provided with a rotating hole 511; the rotary shaft 211 is inserted into the rotary hole 511, and a gap is provided between the rotary shaft 211 and a hole wall of the rotary hole 511 so that the rotary shaft 211 can be inclined with respect to the axis of the rotary hole 511. By providing a gap between the rotating shaft 211 and the wall of the rotating hole 511, the rotating shaft 211 can be inclined with respect to the axis of the rotating hole 511, so as to ensure the smooth pitching movement of the color chip holder 510 relative to the first wall 210.

In addition to the above structure, the color chip fixing seat 510 can implement a pitching motion relative to the first wall 210, and the region of the first wall 210 where the rotating shaft 211 is located can also be set as an elastic region, so that during adjustment, the rotating shaft 211 is acted by the color chip fixing seat 510 to force the elastic region to elastically deform, so that the rotating shaft 211 generates a pitching motion, and the color chip fixing seat 510 can implement a pitching motion relative to the first wall 210.

Fig. 19 shows an embodiment in which the rotating shaft 211 is disposed on the first wall 210, and the color chip fixing base 510 is provided with a rotating hole 511, but the positions of the rotating shaft 211 and the rotating hole 511 may be interchanged, that is: the rotating shaft 211 is disposed on the color chip holder 510, and the first wall 210 has a rotating hole 511.

In order to better maintain the balance during the adjustment process of the color chip fixing base 510, as shown in fig. 19, the color chip adjusting base 520 includes two sub-color chip adjusting bases 521 arranged at intervals; the color chip fixing base 510 includes a base body 512 for fixing the dichroic chip 21 and a base adjusting part 513 fixed on the top of the base body 512, the base body 512 is located between the two sub-color chip adjusting bases 521, and the base adjusting part 513 is connected with each sub-color chip adjusting base 521 through a rotation adjusting structure 550 and a pitch adjusting structure 560 respectively. The top of the base body 512 refers to the end of the base body 512 away from the first wall 210. Since the base adjusting part 513 is connected to the two sub color filter adjusting bases 521 through the rotation adjusting structure 550 and the pitch adjusting structure 560, the base adjusting part 513 can keep better balance in the arrangement direction of the two sub color filter adjusting bases 521, and the color filter fixing base 510 can keep better balance in the arrangement direction of the two sub color filter adjusting bases 521. Meanwhile, the base body 512 is disposed between the two sub-color patch adjusting bases 521, so that the layouts of the color patch fixing base 510 and the color patch adjusting base 520 are more compact, and the occupation of the space in the housing 200 is reduced.

In order to facilitate an operator to adjust an included angle between the dichroic filter 21 and the optical axis of the first laser light 11, as shown in fig. 18, a color filter adjustment handle 570 is disposed on the color filter fixing base 510, so that the operator can conveniently adjust the included angle between the dichroic filter 21 and the optical axis of the first laser light 11 through the color filter adjustment handle 570 during adjustment.

In order to ensure the accuracy of adjustment, as shown in fig. 21, the gap7 between the rotation adjustment guide post 554 and the hole wall of the rotation guide slot 555 is in the range of 0.03mm to 0.05mm in the width direction of the rotation guide slot 555; as shown in fig. 22, along the length direction of the long rotation guide hole 555, the value of the gap8 between the rotation adjustment guide post 554 and the hole wall of the long rotation guide hole 555 needs to be designed according to the actual rotation adjustment requirement, and the design value needs to be 0.1mm larger than the required adjustment value, so as to better absorb the rotation adjustment tolerance.

In a second aspect, an embodiment of the present invention provides a laser projection apparatus, including an optical mechanical assembly, a projection lens, and the laser light source in the first aspect; the light combination component 2 of the laser light source is used for combining the second laser 12 and the fluorescence 42 to form an illumination light beam and outputting the illumination light beam to the optical-mechanical component; the optical machine component is used for modulating the illumination light beams to form projection light beams, and projecting the projection light beams through the projection lens. The projection light beam is projected on a projection screen by a projection lens so as to display a projection picture on the projection screen.

The laser projection device may be a laser television, a projector, or other devices capable of projecting images.

Technical problems to be solved and technical effects to be achieved by the laser projection apparatus provided in the embodiments of the present invention are the same as the technical problems to be solved and technical effects to be achieved by the laser light source in the first aspect, and are not described herein again.

In the description herein, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A laser light source is characterized by comprising a shell, a laser, a light combining component, a first lens component and a fluorescent wheel, wherein the laser is borne on the shell and used for emitting first laser light, and the light combining component, the first lens component and the fluorescent wheel are all arranged in the shell;

the fluorescent wheel is provided with a fluorescent reflection area, and the fluorescent reflection area is used for reflecting the fluorescent light generated by the excitation of the first laser to the light combination component;

the first lens component is positioned on the optical path of the fluorescence;

the light combination component is positioned on an optical path of second laser light formed after the first laser light irradiates the fluorescence wheel and is used for combining and outputting the second laser light and the fluorescence;

the optical axis of the first lens assembly and the optical axis of the first laser are arranged in a non-coaxial mode, so that the optical axis of the first laser and the optical axis of the fluorescence are staggered on the first lens assembly.

2. The laser light source of claim 1, wherein the first lens assembly comprises a first convex lens and a second convex lens coaxially arranged, the second convex lens being located between the first convex lens and the fluorescent wheel;

or the lens component is a piece of aspheric convex lens.

3. The laser light source of claim 2, wherein a distance between an optical axis of the first lens assembly and an optical axis of the first laser light upstream of the first lens assembly is D, an axial dimension of the first convex lens is H, and D and H satisfy: d is (0.3-0.7) H.

4. The laser light source of claim 1, further comprising a second lens assembly located between the laser and the first lens assembly, wherein the second lens assembly includes a third convex lens, a concave lens and a fly-eye lens coaxially arranged, and the third convex lens, the concave lens and the fly-eye lens are sequentially arranged on the optical path of the first laser light along the emitting direction of the first laser light.

5. The laser light source of any one of claims 1 to 4, further comprising a lens holder, wherein the first lens assembly is disposed on the lens holder, the lens holder is located in the housing, and a position of the lens holder relative to the housing is adjustable along a direction perpendicular to an optical axis of the first lens assembly.

6. The laser light source of claim 5, further comprising a lens adjustment seat located in the housing, the lens adjustment seat comprising a seat body and a bearing member disposed on the seat body;

the bearing piece is connected with the base body through a first adjusting structure so that the position of the bearing piece relative to the base body along a first direction can be adjusted, and the first direction is a direction perpendicular to the optical axis of the first lens assembly;

the lens fixing seat is borne by the bearing piece and is connected with the bearing piece through a second adjusting structure, so that the position of the lens fixing seat relative to the bearing piece along a second direction can be adjusted, and the second direction is a direction which is perpendicular to the optical axis of the first lens assembly and the first direction.

7. The laser light source according to claim 6,

the first adjustment structure includes:

the first threaded hole is formed in the seat body;

the first waist-shaped hole is formed in the bearing piece, and the length direction of the first waist-shaped hole is parallel to the first direction;

the first fastener is provided with a rod part and a head part, and the rod part of the first fastener penetrates through the first waist-shaped hole to be connected with the first threaded hole.

8. The laser light source according to claim 7,

the first adjustment structure further includes:

the first guide column is arranged on one of the base body and the bearing piece;

a second waist-shaped hole formed in the other one of the seat body and the bearing piece, wherein the length direction of the second waist-shaped hole is parallel to the first direction;

the first guide column is in sliding fit with the second waist-shaped hole.

9. The laser light source according to claim 6,

the second adjustment structure includes:

the through hole is formed in the bearing piece;

a second threaded hole formed in the lens fixing seat;

the second fastening piece is provided with a rod part and a head part, and the rod part of the second fastening piece penetrates through the through hole and is connected with the second threaded hole;

the elastic piece is arranged between the bearing piece and the lens fixing seat and used for applying elastic force to the lens fixing seat along the second direction and the direction deviating from the bearing piece.

10. The laser light source of claim 9, wherein the lens holder has a mounting post, the second threaded hole is opened on the mounting post, the elastic member is a spring, the spring is sleeved on the mounting post, and one end of the spring abuts against the bearing member and the other end abuts against the lens holder.

11. The laser light source according to claim 9,

the second adjustment structure further includes:

a second guide post disposed on one of the lens holder and the carrier;

a guide hole provided in the other of the lens holder and the carrier, the guide hole extending in the second direction;

the second guide post is in sliding fit with the guide hole.

12. The laser light source of claim 6, wherein the base comprises two sub-bases spaced apart from each other along the first direction, the carrier is located at the top of the two sub-bases and is connected to the two sub-bases through the first adjusting structure, the lens holder is located between the two sub-bases, and the top of the lens holder is connected to the carrier through the second adjusting structure.

13. A laser projection apparatus, comprising an optical mechanical assembly, a projection lens and the laser light source according to any one of claims 1 to 12;

the light combination component of the laser light source is used for outputting an illumination light beam formed by combining the second laser and the fluorescence to the optical mechanical component;

the optical machine component is used for modulating the illumination light beams to form projection light beams, and projecting the projection light beams through the projection lens.