Laser and laser device

Abstract

The invention provides a laser, which comprises a shell and at least two adjacent laser emitting units, and each laser emitting unit is arranged in the shell. Wherein the laser emitting unit comprises a laser light source and a reflecting element arranged on the light emitting side of the laser light source, the laser light source is used for emitting laser beams, the reflecting element is provided with a reflecting surface, the reflecting surface is used for reflecting the laser beams, and the laser beams reflected by the reflecting surface are emergent light of the laser; the distance between the reflecting elements in at least two adjacent laser emitting units is smaller than the distance between the laser light sources. The heat dissipation effect of the laser can be effectively improved, so that the junction temperature of a chip is reduced, and the light emitting power of the laser is improved. The invention further discloses laser equipment.

Description

Technical Field

[0001] The present application relates to the field of laser display technology, and in particular to a laser and laser equipment. Background Art

[0002] Laser display is a fourth-generation display technology. One of its core components is a red, green, and blue (RGB) laser light source. Laser light sources boast an electro-optical conversion efficiency of 45% and a lifespan of up to 20,000 hours. These high efficiency and long lifespan are key features of laser display technology, which has led to its widespread adoption in our daily lives.

[0003] Currently, the power of a single laser source (blue light) can reach up to 6W. In practical applications, to meet higher power requirements, multiple single laser sources need to be integrated to form a laser with multiple laser sources. However, when multiple laser sources are packaged in the same device, their total optical power is less than the theoretical value (i.e., the product of the number of laser sources in the laser and the power of each laser source), which makes it difficult for the laser to achieve ideal performance. Summary of the Invention

[0004] The present application provides a laser and a laser device, which can effectively improve the heat dissipation effect of the laser, thereby reducing the chip junction temperature and increasing the optical power of the laser.

[0005] In a first aspect, the present application provides a laser, which can be installed in a laser TV, laser projector or laser lighting equipment for emitting laser.

[0006] The laser provided in this application includes a housing and at least two adjacent laser emitting units, each of which is disposed within the housing. The laser emitting units include a laser light source and a reflective element disposed on the light-emitting side of the laser light source. The laser light source is configured to emit a laser beam. The reflective element is provided with a reflective surface configured to reflect the laser beam. The laser beam reflected by the reflective surface serves as the output light of the laser. The spacing between the reflective elements in at least two adjacent laser emitting units is smaller than the spacing between the laser light sources.

[0007] This application improves the heat dissipation of the laser by setting a distance between two adjacent laser light sources, thereby reducing the chip junction temperature and increasing the laser's light output power. In addition, this application makes the spacing between the reflective elements in adjacent laser emitting units smaller than the spacing between the laser light sources. While enhancing the laser's heat dissipation effect, this application minimizes or does not reduce the laser's light output area, thereby preventing a significant decrease in the energy density of the laser's output light and ensuring the laser's light output effect.

[0008] In some implementations of the present application, the laser beam located between the laser light source and the reflective element is a first beam segment, and the laser beam reflected by the reflective element is a second beam segment; there is an angle between the propagation directions of the first beam segments in at least two adjacent laser emitting units.

[0009] In some implementations of the present application, the angle is greater than or equal to 5° and less than or equal to 180°.

[0010] When the included angle is greater than or equal to 5° and less than 180°, along the emission direction of one of the laser light sources, the distance between the laser light source and the adjacent laser light source gradually decreases.

[0011] When the included angle is 180°, the reflective elements are arranged in a straight line. For example, in some embodiments, the laser light sources in two adjacent laser emitting units are respectively arranged on either side of the arrangement direction of the reflective elements and have opposite emission directions, and the emission direction of each laser light source is perpendicular to the arrangement direction of the reflective elements. In other embodiments, two adjacent laser emitting units are arranged in mirror-image orientation, and the emission direction of each laser light source is parallel to the arrangement direction of the reflective elements.

[0012] In some implementations of the present application, the reflective elements are arranged in a fan shape, and the laser light sources are located on the same side of the center line of the reflective elements. Along the emission direction of one of the laser light sources, the distance between the laser light source and the adjacent laser light source gradually decreases.

[0013] In some implementations of the present application, the number of laser emitting units is three, and the center points of the three reflective elements are arranged in a triangle.

[0014] In some implementations of the present application, the number of laser emitting units is greater than or equal to three, and the center points of the reflective elements are arranged in a straight line.

[0015] In some implementations of the present application, the number of laser emitting units is four, and the center points of the four reflective elements are arranged in a quadrilateral.

[0016] In some implementations of the present application, the number of laser emitting units is greater than four, and the center points of the reflective elements are evenly arranged along a circle.

[0017] In some implementations of the present application, the number of laser emitting units is greater than four, and the center points of the reflective elements are arranged in an array.

[0018] In some implementations of the present application, the housing includes a tube shell and a cover plate. The tube shell is provided with a mounting groove in which the laser emitting unit is disposed. The cover plate is made of a transparent material and covers the mounting groove to seal the mounting groove.

[0019] In some implementations of the present application, a lens unit is provided above the cover plate, and the lens unit includes multiple lenses. The number of lenses is equal to the number of reflective elements, and the position of each lens corresponds one-to-one to the position of each reflective element. The lens is used to collimate the laser beam reflected by the reflective element.

[0020] In a second aspect, the present application provides a laser device, comprising the laser according to the first aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Schematic diagram showing the arrangement of laser emitting units in some embodiments;

[0022] Figure 2 Shown Figure 1 A side view of the laser emitting unit;

[0023] Figure 3 Schematic diagram showing the appearance of a laser in some embodiments of the present application;

[0024] Figure 4 An exploded view of a laser in some embodiments of the present application is shown;

[0025] Figure 5 Shown Figure 4 A side view of the laser emitting unit;

[0026] Figure 6 Schematic diagram showing the arrangement of laser emission units in some embodiments of the present application;

[0027] Figure 7 Schematic diagrams showing the arrangement of laser emitting units in other embodiments of the present application are shown;

[0028] Figure 8 Schematic diagram showing the arrangement of the laser emitting unit in the first embodiment of the present application;

[0029] FIG9( a ) shows a schematic diagram of the arrangement of the laser emitting unit in the second embodiment of the present application. Figure 1 ;

[0030] FIG9( b ) shows a schematic diagram of the arrangement of the laser emitting unit in the second embodiment of the present application. Figure 2 ;

[0031] FIG10( a ) shows a schematic diagram of the arrangement of the laser emitting unit in the third embodiment of the present application. Figure 1 ;

[0032] FIG10( b ) shows a schematic diagram of the arrangement of the laser emitting unit in the third embodiment of the present application. Figure 2 ;

[0033] Figure 11Schematic diagram showing the arrangement of the laser emitting unit in the fourth embodiment of the present application;

[0034] Figure 12 Schematic diagram showing the arrangement of the laser emitting unit in the fifth embodiment of the present application;

[0035] Figure 13(a) shows Figure 3 AA sectional view;

[0036] Figure 13(b) shows Figure 3 BB cross-sectional view;

[0037] FIG14( a ) shows a schematic diagram of the wiring of the laser light source in some embodiments of the present application. Figure 1 ;

[0038] FIG14( b ) shows a schematic diagram of the wiring of the laser light source in some embodiments of the present application. Figure 2 . DETAILED DESCRIPTION

[0039] In order to make the objectives, technical solutions and advantages of this application clearer, the implementation methods of this application will be further described in detail below with reference to the accompanying drawings.

[0040] An embodiment of the present application provides a laser, which can be installed in a laser TV, laser projector or laser lighting equipment for emitting laser.

[0041] With the growing demand for high-power lasers, existing technologies often incorporate multiple laser sources within a laser to increase its output power. According to current industry best practices, the maximum optical power of a laser with multiple laser sources can reach 160W. However, when multiple laser sources are packaged in the same device, their total output power is less than the theoretical value (i.e., the product of the number of laser sources within the laser and the power of each laser source).

[0042] The inventors discovered that the main reason why the total optical output power of multiple laser light sources packaged in the same device is less than the theoretical value is that the laser light sources generate heat during operation. When multiple laser light sources are integrated together, poor heat dissipation results, which leads to high chip junction temperatures and affects the laser's optical output power.

[0043] To solve the problem of poor heat dissipation of laser light sources, in some embodiments, the heat dissipation effect of the laser light sources can be enhanced by increasing the spacing between the laser light sources. Figure 1 , Figure 1 The laser shown includes a plurality of laser emitting units 2a, each of which includes a laser light source 21a and a reflective element 22a disposed on the light emitting side of the laser light source 21a. Figure 1As shown, the laser light source 21a and the reflective element 22a are rectangular when viewed from above, and the laser light source 21a and the reflective element 22a are longitudinally arranged along the length direction of the laser emitting unit 2a. Figure 2 A side view of the laser emitting unit 2a is shown, referring to Figure 2 , the laser light source 21a can emit a laser beam 3a. The reflecting element 22a is a device similar to a prism. A reflecting surface 221a is provided on the reflecting element 22a, which is 45 degrees to the horizontal plane. The reflecting surface 221a is used to reflect the laser beam 3a incident in the horizontal direction, so that the reflected laser beam 3a propagates in the vertical upward direction. The reflected beam of the reflecting surface 221a is 90 degrees to the incident beam. The laser beam 3a reflected by the reflecting element 22a is the output light of the laser. There is a certain spacing distance (such as Figure 1 When the heat dissipation effect needs to be enhanced, the distance between two adjacent laser emitting units 2a can be increased, thereby reducing the chip junction temperature and increasing the laser output power.

[0044] However, the inventors have found that when the spacing between the laser emitting units 2a increases, the energy density of the laser light will decrease. This is because the energy density of the laser light is the ratio of the light intensity of the laser light to the light output area. The light output area is the light output area of ​​the laser (such as Figure 1 The light-emitting region encompasses the projection of the emitted light from each laser emitting unit 2a on the reflective surface 221a. As the spacing between laser emitting units 2a increases, the spacing between reflective elements 22a also increases, increasing the area of ​​the light-emitting region. This reduces the energy density of the emitted light, affecting the laser's light-emitting performance.

[0045] To solve the above problems, an embodiment of the present application provides a laser. Figure 3 This is a schematic diagram of the laser's appearance. Figure 4 This is an exploded view of the laser. Figure 3 and Figure 4 The laser comprises a housing 1 and at least two adjacent laser emitting units 2, each of which is disposed in the housing 1. The laser emitting unit 2 comprises a laser light source 21 and a reflective element 22 disposed on the light emitting side of the laser light source 21.

[0046] Figure 5 Shown Figure 4 A side view of the laser emitting unit 2. Figure 5, the laser light source 21 is used to emit a laser beam 3, the reflective element 22 can be a reflector, and a reflective surface 221 is provided on the reflective element 22, and the reflective surface 221 is used to reflect the laser beam 3. Specifically, the laser beam located between the laser light source 21 and the reflective element 22 is the incident beam 31 of the reflective element 22 (as an example of the first beam segment), and the laser beam after being reflected by the reflective element 22 is the reflected beam 32 of the reflective element 22 (as an example of the second beam segment). The propagation direction of the reflected light beam 32 emitted by each laser emitting unit 2 is nearly parallel. Depending on the setting of the reflective element 22 and the reflective surface 221 therein, the propagation direction of each reflected light beam 32 can be exactly the same, or there can be a small angle difference range. The present invention is not limited to this. In the following description, it is preferably described based on the situation that each reflected light beam 32 is perpendicular to the horizontal plane.

[0047] Figure 6 FIG2 shows a top view of each laser emitting unit 2. Figure 6 In this application, the reflective elements 22 are arranged in a concentrated manner, and the laser light sources 21 are arranged in a dispersed manner, so that the distance between the reflective elements 22 in two adjacent laser emitting units 2 (such as Figure 6 The distance L2 shown in FIG) is smaller than the distance between the laser light sources 21 (as shown in FIG). Figure 6 , as shown in the distance L3 in the figure). The distance L2 is defined as the geometric center distance between the reflective elements 22 in two adjacent laser emitting units 2, and the distance L3 is defined as the geometric center distance between the chips in the laser light sources 21 in two adjacent laser emitting units 2. In the present application, when describing the distance between two reflective elements 22, it is preferred to use the distance between the geometric centers of the two reflective elements 22; when describing the distance between two laser light sources 21, since the chip in the laser light source 21 is the main heat source, it is preferred to use the distance between the geometric centers of the chips in the two laser light sources 21. In addition to using the geometric center for definition, other definition methods can also be used, such as the distance between the centers of gravity, or the distance between the same designated positions in two components. In the following, unless otherwise specified, the center refers to the geometric center.

[0048] from Figure 6 From the overall layout of the laser emitting unit 2, in the four laser emitting units 2, the four reflective elements 22 are arranged in a straight line, that is, the center of each reflective element 22 is in a straight line (such as Figure 6 In two adjacent laser emitting units 2, the two laser light sources 21 are respectively arranged on opposite sides of the arrangement direction of the reflective element 22. Figure 6As shown in FIG, the laser light sources 21 in two adjacent laser emitting units 2 are located on opposite sides of the line containing the center of the reflective element 22, and the light beams emitted by the two laser light sources 21 are emitted in opposite directions. The emission direction of each laser light source 21 is perpendicular to the arrangement direction of the reflective element 22.

[0049] Will Figure 6 and Figure 1 By comparison, Figure 6 The distance L3 between the laser light sources 21 in two adjacent laser emitting units 2 is significantly greater than Figure 1 The distance L1 between the laser light sources 21 in two adjacent laser emitting units 2 is Figure 6 The distance L2 between two adjacent reflective elements 22 is Figure 1 The distance L1 between two adjacent reflective elements 22a is equal, that is, Figure 6 The area of ​​the light-emitting area S2 is compared with Figure 1 The area of ​​the light-emitting region S1 in the laser is not reduced. Therefore, the present application can enhance the heat dissipation effect of the laser while minimizing or not reducing the light-emitting area of ​​the laser. This can both increase the light output power of the laser and prevent the energy density of the laser light from decreasing, thus ensuring the light output effect of the laser.

[0050] In some implementations of the present application, the reflective elements 22 are arranged adjacent to each other, and the laser light sources 21 are distributed outside the area where the reflective elements 22 converge. By arranging the reflective elements 22 adjacent to each other, the light output area of ​​the laser can be minimized while improving the heat dissipation effect.

[0051] Figure 6 The corresponding embodiment presents the case when the laser emitting unit 2 is greater than or equal to two. In the case where the laser emitting unit 2 is only equal to two, in addition to Figure 6 In addition to the layout of any two laser emitting units 2, the following layout can also be used: Figure 7 The layout shown.

[0052] refer to Figure 7 The number of laser emitting units 2 is also two, but the two laser emitting units 2 are arranged in a mirror image relative to each other. Figure 6 The arrangement of any two laser emitting units 2 is different. Figure 6 The laser emitting units 2 are arranged substantially in parallel. Figure 7 The laser emitting units 2 are arranged in series, i.e., two laser emitting units 2 are collinearly arranged opposite each other along their length. The reflective elements 22 are close together, while the laser light sources 21 are spaced apart. The emission direction of each laser light source 21 is parallel to the arrangement direction of the reflective elements 22.

[0053] Figure 6 and Figure 7 The case where the angle between the propagation directions of the first beam segments 31 in two adjacent laser emitting units 2 is equal to 180 degrees is described in FIG. In this case, the incident beams 31 are in a state of facing each other. Figure 6 and Figure 7 When the included angle is 180°, the distance between the laser light sources 21 in two adjacent laser emitting units 2 can reach the maximum.

[0054] In some implementations of the present application, the propagation directions of the incident light beams 31 in at least two adjacent laser emitting units 2 have an angle therebetween, such that the spacing between the two reflective elements 22 is smaller than the spacing between the two laser light sources 21. For example, the angle may be greater than or equal to 5° and less than 180°.

[0055] refer to Figure 8 , when the angle (such as Figure 8 When the angle α (as shown in FIG) is greater than or equal to 5° and less than 180°, along the emission direction of one of the laser light sources 21, the distance between the laser light source 21 and the adjacent laser light source 21 gradually decreases.

[0056] This application does not limit the arrangement shape of each laser emitting unit 2. Any laser that can satisfy the requirement that the distance between two adjacent reflective elements 22 is smaller than the distance between two adjacent laser light sources 21 falls within the protection scope of this application.

[0057] In addition to reference Figure 6 and Figure 7 In addition to the situations described above where the laser emitting units 2 are placed in parallel or in series, the laser emitting units 2 can also be set to other arrangements, and the technical effects described in this application can be achieved under the premise that the distance between the two adjacent reflective elements 22 is smaller than the distance between the two adjacent laser light sources 21.

[0058] In order to enable those skilled in the art to better understand, the arrangement of the laser emitting unit 2 is described in detail below through several embodiments.

[0059] Example 1

[0060] refer to Figure 8 , each reflective element 22 is arranged in a fan shape, and each laser light source 21 is located on the center line of each reflective element 22 (such as Figure 8 On the same side of the laser source 21 (shown by the arc-shaped dotted line D2), along the emission direction of any one of the laser light sources 21, the distance between the laser light source 21 and the adjacent laser light source 21 is gradually reduced. Figure 8In the arrangement shown, along the emission direction of the laser light source 21 in the middle (such as Figure 8 The distance between the upstream point A and the left laser light source 21 is as shown in the P direction. Figure 8 As shown by the dimension L4 in FIG, the distance between the downstream point B and the left laser light source 21 is as follows: Figure 8 As shown in the figure, L5 is significantly smaller than L4. Therefore, along the P direction, the distance between the central laser light source 21 and the left laser light source 21 gradually decreases.

[0061] Example 2

[0062] 9(a) and 9(b), the number of laser emitting units 2 is three, and the line connecting the center points of the three reflective elements 22 (as shown by the dotted line D3 in FIG9(a) and FIG9(b)) is triangular. For example, in some embodiments, as shown in FIG9(a), the emission directions of two laser light sources 21 are the same, the emission direction of another laser light source 21 is opposite to that of the two laser light sources 21, and the reflected light beams 32 are parallel to each other. In other embodiments, as shown in FIG9(b), the angle between the emission direction of any laser light source 21 and the emission direction of the laser light source 21 adjacent to it can be an obtuse angle or an acute angle. For example, in the arrangement shown in FIG9(b), the angle β1 between the emission directions of the two laser light sources 21 located below is an acute angle, and the angles β2 and β3 between the top laser light source 21 and the two laser light sources 21 below are both obtuse angles.

[0063] Example 3

[0064] Referring to Figures 10(a) and 10(b), there are four laser emitting units 2, and the line connecting the center points of the four reflective elements 22 (as shown by the dotted line D4 in Figures 10(a) and 10(b)) is a quadrilateral. For example, the line connecting the center points of the four reflective elements 22 can be rectangular. In some embodiments, as shown in Figure 10(a), the angle between the emission direction of any laser light source 21 and the emission direction of the laser light source 21 adjacent to it is 90°. In other embodiments, as shown in Figure 10(b), the angle between the emission direction of any laser light source 21 and the emission direction of the laser light source 21 adjacent to it can be an obtuse angle or an acute angle. For example, in the arrangement shown in Figure 10(b), the angle γ1 between the emission directions of the two laser light sources 21 located above and the angle γ2 between the emission directions of the two laser light sources 21 located below are both acute angles, and the angle γ3 between the emission directions of the two laser light sources 21 located on the left and the angle γ4 between the emission directions of the two laser light sources 21 located on the right are both obtuse angles.

[0065] Example 4

[0066] refer to Figure 11 , the number of laser emitting units 2 is greater than four, and the center point connection line of each reflective element 22 (such as Figure 11 The reflective elements 22 may be arranged in a circular pattern (as indicated by the dashed line D5 in FIG), with the laser light sources 21 arranged outside the line connecting the center points. Specifically, the reflective elements 22 may be evenly distributed around the dashed line D5, i.e., the center points of the reflective elements 22 may equally divide the dashed line D5. In other embodiments, the reflective elements 22 may also be unevenly distributed.

[0067] Example 5

[0068] refer to Figure 12 , the number of laser emitting units 2 is greater than four, and the center points of the reflective elements 22 are arranged in an array (such as Figure 12 Specifically, any four points in the array form a parallelogram, which can be a rectangle or a rhombus.

[0069] The above embodiments are examples of the arrangement of the reflective elements 22. The specific implementation of the arrangement of the non-reflective elements 22 is limited to these descriptions. Any equivalent implementation or modification that does not depart from the scope of this application should be included in the scope of this application.

[0070] In some implementations of this application, reference is made to Figure 4 As shown in Figure 13(a), the housing 1 includes a tube shell 11 and a cover plate 12. A mounting groove 111 is provided on the tube shell 11, and the laser emitting unit 2 is provided in the mounting groove 111. The cover plate 12 is made of a transparent material and covers the mounting groove 111 to seal the mounting groove 111. For example, the tube shell 11 can be made of copper oxide, and the bottom of the tube shell 11 can conduct the heat generated by the laser light source 21 outward, thereby further enhancing the heat dissipation effect of the laser light source 21. The cover plate 12 can be made of aluminum oxide sapphire, and the second light beam segment reflected by the reflective element 22 can pass through the cover plate 12 and be output to the outside of the housing 1. For example, a metal frame is provided at the edge of the cover plate 12, and the metal frame is connected to the tube shell 11 by eutectic welding to seal the mounting groove 111. The sealed mounting groove 111 can form an airtight environment to prevent moisture, impurities, etc. from coming into contact with the laser light source 21 and affecting the life of the laser light source 21.

[0071] In some implementations of this application, reference is made to Figure 4As shown in Figure 13(b), a lens unit 5 is provided above the cover plate 12. The lens unit 5 is bonded to the four corners of the cover plate 12 using coupling glue 7. The lens unit 5 includes multiple lenses 51. The number of lenses 51 is equal to the number of reflective elements 22, and the position of each lens 51 corresponds one-to-one with the position of each reflective element 22. The lenses 51 are used to collimate the reflected light beams 32. After each reflected light beam 32 passes through the cover plate 12 and its corresponding lens 51, it forms multiple nearly parallel, nearly collimated light beams that are output to the application end.

[0072] In some implementations of the present application, referring to Figures 14(a) and 14(b), metal wires 6 are further connected between the laser light sources 21. The metal wires 6 are used to energize the laser light sources. For example, the metal wires 6 may be gold wires.

[0073] In the second aspect, the present application provides a laser device, comprising the aforementioned embodiment combined with Figures 3 to 14(b) Any of the lasers described above. For example, the laser device may be a laser TV, a laser projector, or a laser lighting device.

[0074] The above describes the implementation methods of the present application by means of specific specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Although the description of the present application will be introduced in conjunction with some embodiments, this does not mean that the features of this application are limited to the implementation methods. On the contrary, the purpose of introducing the application in conjunction with the implementation methods is to cover other options or modifications that may be extended based on the claims of the present application. The present application can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the present application, some specific details are omitted in the description. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other unless there is a conflict.

[0075] In the embodiments of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, features defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0076] In the embodiments of this application, "and / or" is simply a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0077] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium.

[0078] In the description of this application, it should be noted that the terms "upper", "lower", "top", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on this application.

[0079] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "dispose," "install," "connect," and "fit" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0080] Obviously, those skilled in the art may make various changes and modifications to this application without departing from the spirit and scope of this application. Thus, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalents, this application is intended to include these modifications and variations.

Claims

1. A laser, characterized in that: include: case; at least two adjacent laser emitting units, disposed in the housing; The laser emitting unit includes a laser light source and a reflective element provided on the light-emitting side of the laser light source, wherein the laser light source is used to emit a laser beam, and the reflective element is used to reflect the laser beam; The distance between the reflective elements in the at least two adjacent laser emitting units is smaller than the distance between the laser light sources.

2. The laser according to claim 1, characterized in that The laser beam located between the laser light source and the reflective element is a first beam segment, and the laser beam reflected by the reflective element is a second beam segment; There is an angle between the propagation directions of the first light beam segments in the at least two adjacent laser emitting units.

3. The laser according to claim 2, characterized in that The included angle is greater than or equal to 5° and less than 180°, and along the emission direction of one of the laser light sources, the distance between the laser light source and the adjacent laser light source gradually decreases.

4. The laser according to claim 2, characterized in that The included angle is 180°, and the reflective elements are arranged in a straight line.

5. The laser according to claim 4, characterized in that The laser light sources in two adjacent laser emitting units are respectively arranged on both sides of the arrangement direction of the reflective elements and have opposite emission directions, and the emission direction of each laser light source is perpendicular to the arrangement direction of the reflective elements.

6. The laser according to claim 4, characterized in that The two adjacent laser emitting units are arranged in a mirror-image manner, and the emission direction of each laser light source is parallel to the arrangement direction of the reflective elements.

7. The laser according to claim 1, characterized in that The reflective elements are arranged in a fan shape, and the laser light sources are located on the same side of a center line of the reflective elements. Along the emission direction of one of the laser light sources, the distance between the laser light source and the adjacent laser light source gradually decreases.

8. The laser according to claim 1, characterized in that The number of the laser emitting units is three, and the center points of the three reflective elements are arranged in a triangle.

9. The laser according to claim 1, characterized in that The number of the laser emitting units is greater than or equal to three, and the center points of the reflective elements are arranged in a straight line.

10. The laser according to claim 1, characterized in that The number of the laser emitting units is four, and the center points of the four reflective elements are arranged in a quadrilateral.

11. The laser according to claim 1, characterized in that The number of the laser emitting units is greater than four, and the center points of the reflective elements are evenly arranged along a circle.

12. The laser according to claim 1, characterized in that The number of the laser emitting units is greater than four, and the center points of the reflective elements are arranged in an array.

13. The laser according to any one of claims 1 to 12, characterized in that The housing comprises: a tube shell, on which a mounting groove is provided, and the laser emitting unit is arranged in the mounting groove; The cover plate is made of a transparent material and covers the installation slot to seal the installation slot.

14. The laser according to claim 13, characterized in that A lens unit is provided above the cover plate, and the lens unit includes a plurality of lenses. The number of the lenses is equal to the number of the reflective elements, and the position of each lens corresponds one-to-one to the position of each reflective element. The lens is used to collimate the laser beam reflected by the reflective element.

15. A laser device, characterized in that: A laser comprising the laser according to any one of claims 1 to 14.

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