CN117254342A

CN117254342A - Laser device

Info

Publication number: CN117254342A
Application number: CN202310985969.8A
Authority: CN
Inventors: 李巍; 田有良; 刘显荣
Original assignee: Qingdao Hisense Laser Display Co Ltd
Current assignee: Qingdao Hisense Laser Display Co Ltd
Priority date: 2021-09-06
Filing date: 2021-09-06
Publication date: 2023-12-19
Also published as: CN113764972A; CN113764972B

Abstract

The application discloses a laser belongs to photoelectric technology field. The laser includes: the light-emitting device comprises a bottom plate, annular side walls, a plurality of light-emitting components, a light-transmitting sealing component and a collimating lens group; the side wall and the plurality of light-emitting components are all positioned on the bottom plate, the side wall surrounds the plurality of light-emitting components, the light-transmitting sealing component is positioned at one side of the side wall away from the bottom plate, and the collimating lens group is positioned at one side of the light-transmitting sealing component away from the bottom plate; the collimating lens group comprises a plurality of collimating lenses which are in one-to-one correspondence with the plurality of luminous components, and the plurality of collimating lenses are arranged in a plurality of rows; the maximum length of each collimator lens in the column direction is greater than the maximum length in the row direction; orthographic projection of each collimating lens on the bottom plate is in a capsule shape; the capsule shape is formed by two opposite parallel straight edges and two opposite arc edges; and the number of the collimating lenses of different rows is not equal and the interval between any two adjacent light emitting chips in the row direction is equal. The application solves the problem of low luminous efficiency.

Description

Laser device

The present application is based on Chinese invention application 202111038583.3 (2021-09-06), title of invention: a divisional application for lasers.

Technical Field

The application relates to the field of photoelectric technology, in particular to a laser.

Background

With the development of photoelectric technology, lasers are widely used, and the requirements on the luminous efficiency of the lasers are higher and higher.

In the related art, as shown in fig. 1, a laser 00 includes a package 001, a plurality of light emitting modules 002, an annular sealing cover plate 003, a light-transmitting sealing layer 004, and a collimator lens set 005. Wherein, one surface of the tube shell 001 has an opening, and the plurality of light emitting components 002 are located in the accommodating space of the tube shell 001. The outer edge of the sealing cover plate 003 is fixed on the side of the opening of the tube shell 001, the edge of the light-transmitting sealing layer 004 is fixed with the inner edge of the sealing cover plate 003, and the edge of the collimating lens group 005 is fixed on the surface of the outer edge of the sealing cover plate 003 far away from the tube shell 001. The collimating lens group 005 is located at one side of the sealing cover plate 003 away from the tube shell 001. The collimating lens 005 comprises a plurality of collimating lenses T which are arranged in an array, the plurality of collimating lenses T are in one-to-one correspondence with the plurality of light emitting assemblies 002, laser emitted by each light emitting assembly 002 passes through the transparent sealing layer 004 and is emitted to the corresponding collimating lens T, and the collimating lens T is used for collimating the emitted laser and then emitting the collimated laser, so that the light emission of the laser is realized.

However, the laser emitted by the light emitting component 002 in the related art has more laser loss after passing through the collimating lens set 005, resulting in lower light emitting efficiency of the laser.

Disclosure of Invention

The application provides a laser, can solve the lower problem of luminous efficacy of laser. The laser includes: the light-emitting device comprises a bottom plate, annular side walls, a plurality of light-emitting components, a light-transmitting sealing component and a collimating lens group;

the side wall and the plurality of light-emitting components are both positioned on the bottom plate, the side wall surrounds the plurality of light-emitting components, the light-transmitting sealing component is positioned at one side of the side wall far away from the bottom plate, and the collimating lens group is positioned at one side of the light-transmitting sealing component far away from the bottom plate;

the collimating lens group comprises a plurality of collimating lenses which are in one-to-one correspondence with the plurality of luminous components, and the plurality of collimating lenses are arranged in a plurality of rows; the maximum length of each collimating lens in the column direction is greater than the maximum length in the row direction, and the width of each of the two end parts in the column direction is smaller than the width of the middle part;

any two adjacent rows of collimating lenses in the plurality of rows of collimating lenses are staggered; and in any two rows of collimating lenses, the end parts of the collimating lenses close to the other row of collimating lenses are satisfied, and the collimating lenses are at least partially positioned between the two end parts of two adjacent collimating lenses in the other row of collimating lenses.

The beneficial effects that this application provided technical scheme brought include at least:

in the laser provided by the application, any two adjacent rows of collimating lenses are staggered, and the end parts of the collimating lenses in one row can be positioned between the end parts of two adjacent collimating lenses in the other row. The space between the end parts of the adjacent collimating lenses can be utilized, so that the space utilization rate can be improved, the gaps between the collimating lenses are reduced, the arrangement density of the collimating lenses is increased, the arrangement of the collimating lenses is ensured to be compact, and furthermore, laser emitted by the light emitting assembly can be emitted to the collimating lenses in the collimating lens group more, and then emitted after being collimated by the collimating lenses, the loss of the laser emitted from the gaps of the collimating lenses is reduced, and the light emitting efficiency of the laser is improved.

In addition, because the arrangement of the collimating lenses is compact, more collimating lenses can be arranged in the area with smaller area in the collimating lens group. Therefore, the laser can realize the arrangement of each light emitting component and the collimating lens in the laser only by a small volume, thereby being beneficial to improving the miniaturization of the laser.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a laser provided in the related art;

fig. 2 is a schematic structural diagram of a laser according to an embodiment of the present application;

FIG. 3 is a schematic diagram of another laser according to an embodiment of the present disclosure;

FIG. 4 is a schematic diagram of another related art laser;

FIG. 5 is a schematic diagram of a structure of a further laser according to an embodiment of the present application;

FIG. 6 is a schematic diagram of another laser according to an embodiment of the present disclosure;

FIG. 7 is a schematic diagram of a laser according to another embodiment of the present disclosure;

FIG. 8 is a schematic diagram of another laser according to another embodiment of the present application;

fig. 9 is a schematic structural diagram of a collimating lens group according to an embodiment of the present application.

Description of the embodiments

For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

With the development of photoelectric technology, lasers are widely used because of the advantages of wide color gamut, high brightness, low energy consumption, long service life, no pollution and the like, and for example, lasers can be used as light sources of laser projection devices or laser televisions and other display devices. At present, the requirements on the display effect of the display device are higher and higher, and the laser emitted by the laser serving as a light source is expected to be utilized as much as possible so as to improve the brightness of an image displayed by the display device and reduce the light emitting power of the laser. In addition, the demands of users for miniaturization and thinning of electronic devices are increasing, so that the miniaturization of lasers is important because of the smaller volumes of the individual components in the electronic devices.

The embodiment of the application provides a laser, and the arrangement of parts is comparatively compact in this laser, and the light loss of laser is less, and the luminous efficacy of laser is higher. In addition, the laser can be made smaller in size on the basis of achieving the same light emission performance as in the related art, which is advantageous for miniaturization of the laser.

Fig. 2 is a schematic structural diagram of a laser according to an embodiment of the present application, fig. 3 is a schematic structural diagram of another laser according to an embodiment of the present application, fig. 3 may be a top view of the laser shown in fig. 2, and fig. 2 is a schematic diagram of a section b-b' of the laser shown in fig. 3. Referring to fig. 2 and 3 in combination, the laser 10 may include: a base plate 1011, annular side walls 1012, a plurality of light emitting modules 102, a light transmissive sealing module (comprising a sealing cover plate 103 and a light transmissive sealing layer 104) and a collimator lens set 105.

The sidewalls 1012 and the light emitting chips 102 are all located on the bottom plate 1011, and the sidewalls 1012 surround the light emitting chips 102. The structure formed by the bottom plate 1011 and the side wall 1012 may be called a package 101, and the bottom plate 1011 and the side wall 1012 enclose a receiving space of the package 101. The light-transmitting sealing component is located on the side of the opening of the tube housing 101, and the collimating lens group 105 is located on the side of the light-transmitting sealing component away from the tube housing 101. Optionally, the sealing cover plate 103 in the light-transmitting sealing assembly is annular, and an outer edge of the sealing cover plate 103 is fixed to the side of the tube housing 101 where the opening is located. The edge of the light-transmitting sealing layer 104 is fixed to the inner edge of the sealing cover plate 103. The edge of the collimating lens group 105 and the outer edge of the sealing cover plate 103 are fixed away from the surface of the tube shell 101. Alternatively, the edges of the collimating lens group 105 may be bonded to the outer edges of the sealing cover plate 103 by an adhesive, which may include a glass frit, a low temperature glass solder, an epoxy, or other glue.

The collimating lens group 105 includes a plurality of collimating lenses T corresponding to the light emitting assemblies 102 one by one, and each light emitting assembly 102 is configured to emit laser light to the corresponding collimating lens T, where the collimating lens T is configured to collimate the incident laser light. It should be noted that, the light is collimated, that is, the divergence angle of the light is adjusted so that the light is adjusted to be as close to parallel light as possible. As shown in fig. 3, the plurality of collimating lenses T in the collimating lens group 105 are arranged in a plurality of rows, for example, a row direction is an x direction in fig. 3, and a direction perpendicular to the row direction is a column direction, that is, a y direction. In the embodiment of the present application, the plurality of collimating lenses T are arranged in four rows, and seven collimating lenses T are illustrated in each row. Optionally, the number of the collimating lenses T and the number of rows in the collimating lens group 105 may be adjusted accordingly, for example, the collimating lens group may also include five rows, six rows or other numbers of collimating lenses, and the number of the collimating lenses in each row may also be six, five or other numbers, which is not limited in this embodiment.

The collimating lens T is elongated as a whole, and the maximum length of the collimating lens T in a first direction is longer than the maximum length in a second direction, the first direction being perpendicular to the second direction. In the embodiment of the present application, the column direction of the collimator lens is taken as a first direction, and the row direction of the collimator lens is taken as a second direction. Each of the collimator lenses T in the collimator lens group 105 may have two end portions each having a smaller width than a middle portion and a middle portion located before the two end portions in the column direction (i.e., the y direction). The width of the end portion and the width of the intermediate portion refer to the width in the row direction. The end portion and the intermediate portion of the collimator lens are only relative concepts, and the end portion represents only a partial region of the collimator lens at both ends, the intermediate portion represents a region other than the end portion of the collimator lens, and the end portion and the intermediate portion are not precisely divided regions. For the example of fig. 3, the two ends of the collimator lens in the column direction are referred to as an upper end and a lower end, respectively, in the embodiment of the present application. For example, as shown in fig. 3, the orthographic projection of each collimator lens T on the base plate 1011 may have an elliptical shape with a major axis parallel to the column direction of the collimator lens T and a minor axis parallel to the row direction of the collimator lens T.

It should be noted that, in the laser 10, the divergence angle of the laser light emitted by the light emitting component 102 is larger on the fast axis than on the slow axis. The fast axis and the slow axis are directions of two light vectors during light transmission, and the fast axis is perpendicular to the slow axis. The initial spot of laser light emitted by the light emitting assembly 102 has a smaller size on the fast axis than on the slow axis. For example, the divergence angle of the laser light emitted by the light emitting component 102 on the fast axis ranges from 25 degrees to 35 degrees, such as 30 degrees, and the divergence angle on the slow axis ranges from 5 degrees to 7 degrees, such as 7 degrees. The initial spot of laser light emitted by the light emitting assembly 102 has a size of about 1 micron on the fast axis and greater than 10 microns on the slow axis, such as 200 microns on the slow axis. When the laser emitted by the light emitting component 102 propagates in the accommodating space of the package 101 and further passes through the transparent sealing layer 104 and is directed to the collimating lens T corresponding to the light emitting component 102 in the collimating lens group 105, a light spot of the laser is elliptical, and the size of the light spot on the fast axis is larger than that on the slow axis. The major axis of the elliptical spot is parallel to the column direction of the collimator lens T, and the minor axis of the elliptical spot is parallel to the row direction of the collimator lens T. In this embodiment of the present application, the maximum length of the collimating lens T in the column direction is greater than the maximum length in the row direction, and the width of the two end portions of the collimating lens T in the column direction is smaller than the width of the middle portion, so that the shape of the collimating lens T can be guaranteed to be closer to the shape of a light spot formed by laser on the collimating lens T, and the size of the collimating lens T is reduced on the basis of guaranteeing to receive the laser.

Any two adjacent rows of collimating lenses T in the plurality of rows of collimating lenses T of the collimating lens group 105 may be staggered. It should be noted that the staggered arrangement of the two rows of collimating lenses means that the two rows of collimating lenses are staggered in the column direction (i.e., the y direction), and the collimating lenses in the two rows are not aligned in the column direction, that is, the connecting lines of two adjacent collimating lenses respectively belonging to the two rows are not parallel to the column direction. The line connecting the two collimator lenses may refer to the line connecting the centers of the two collimator lenses. Alternatively, the collimating lenses in the two rows may be all or only partially offset. If all the collimating lenses in the two rows are not aligned in the column direction, and if part of the collimating lenses in the two rows are aligned in the column direction, part of the collimating lenses in the two rows are not aligned in the column direction. In the embodiment of the present application, all the adjacent two rows of collimating lenses T are offset in the column direction. The two rows of collimator lenses are offset, so that each collimator lens in one row is located between two adjacent collimator lenses in the other row or is located outside the other row of collimator lenses in the row direction. Illustratively, a second collimating lens T of the first row of collimating lenses T in fig. 3 is located between the first collimating lens T and the second collimating lens T of the second row of collimating lenses T in the x-direction; the first collimator lens T of the first row of collimator lenses T is located on the left side of the second row of collimator lenses T in the x-direction.

In any two adjacent rows of collimating lenses T in the collimating lens group 105, there are collimating lenses T whose ends close to the other row of collimating lenses T are satisfied, at least partially between the two ends of the two adjacent collimating lenses T in the other row of collimating lenses T. At least part of the end of one collimator lens T in the other row of collimator lenses T may be present in the two rows of collimator lenses T between the end of any adjacent two collimator lenses T in the same row, which is close to the other row of collimator lenses T. That is, on the reference plane in the parallel column direction, there is overlap in the orthographic projections of the adjacent two rows of collimator lenses. For example, for the first and second rows of collimator lenses T and T in fig. 3, the lower end portion of the second collimator lens T in the first row is located between the upper end portions of the first and second collimator lenses T in the second row; the lower end of the third collimator lens T in the first row is located between the upper ends of the second collimator lens T and the third collimator lens T in the second row. The upper end part of one collimating lens T in the second row is arranged between the lower end parts of every two adjacent collimating lenses T in the first row, and the lower end part of one collimating lens T in the first row is also arranged between the upper end parts of every two adjacent collimating lenses T in the second row.

Fig. 4 is a schematic structural view of another laser provided in the related art, fig. 4 may be a top view of fig. 1, and fig. 1 may be a schematic view of a section b-b' of the laser of fig. 4. In the related art, light emitting components in the laser are arranged in regular rows and columns, necessary gaps exist between each light emitting component in the row direction and the column direction, and collimating lenses in the collimating lens group are arranged in regular rows and columns correspondingly. As shown in fig. 4, in the collimating lens group 005 of the related art, a plurality of collimating lenses T are arranged in an array, for example, four rows and seven columns regularly. The laser beam emitted by each light-emitting component has an opening angle, each collimating lens in the collimating lens group needs to completely receive the laser emitted by the corresponding light-emitting component, and the area of each collimating lens needs to be larger than the area of a light spot formed by the laser emitted by the corresponding light-emitting component. An ineffective light treatment area exists between the adjacent collimating lenses, and laser emitted from the area is stray light, so that the laser is difficult to be received and utilized by subsequent optical elements, and light loss is formed. And the larger the gap between the light emitting elements in the row and column directions, the more the light loss will be.

In the embodiment of the present application, as shown in fig. 3, the collimating lenses T in adjacent rows are staggered, and the space between the ends of two adjacent collimating lenses T in each row may be occupied by the end of another collimating lens T, so that the space utilization rate in the collimating lens group may be improved, and the arrangement of each collimating lens may be more compact. Compared with the related art, the gaps between the adjacent collimating lenses are smaller, and the arrangement density is larger. The laser emitted by the light emitting component can be emitted to the collimating lenses as far as possible, but not the ineffective gaps among the collimating lenses, so that the laser emitted by the light emitting component can be more utilized, and the light loss of the laser is reduced. In addition, compared with the related art, the collimating lenses with the same quantity are arranged, and in the embodiment of the application, the size of the collimating lens group can be smaller, and then the size of the laser can be smaller.

In summary, in the laser provided in the embodiment of the present application, any two adjacent rows of collimating lenses are arranged in a staggered manner, and the end portions of the collimating lenses in one row may be located between the end portions of two adjacent collimating lenses in another row. The space between the end parts of the adjacent collimating lenses can be utilized, so that the space utilization rate can be improved, the gaps between the collimating lenses are reduced, the arrangement density of the collimating lenses is increased, and the arrangement of the collimating lenses is ensured to be compact. Furthermore, the laser emitted by the light emitting component can be more emitted to the collimating lens in the collimating lens group, and then emitted after being collimated by the collimating lens, so that the loss of the laser emitted from the gap of the collimating lens is reduced, and the light emitting efficiency of the laser is improved.

Fig. 3 illustrates an example of an elliptical front projection of each collimator lens T of the collimator lens group 105 on the base 1011. The front projection of the collimator lens T on the base 1011 in the embodiment of the present application may take other shapes, and the following three alternative ways are described as examples. For convenience of description, the shape of the orthographic projection of the collimator lens T on the base plate 1011 will be hereinafter simply referred to as the shape of the collimator lens T.

In a first alternative, fig. 5 is a schematic structural diagram of yet another laser according to an embodiment of the present application. Fig. 5 may also be a top view of the laser shown in fig. 2, and fig. 2 may also be a schematic view of the cross section b-b' of the laser shown in fig. 5. As shown in fig. 5, the front projection of each collimator lens T in the collimator lens group 105 on the base 1011 may be in a capsule shape. The capsule shape is surrounded by two opposite parallel straight edges and two opposite arc edges. The capsule shape is equivalent to a shape obtained by cutting off a part of two ends of an ellipse along the major axis direction of the ellipse; or a shape obtained by cutting off a part of each of both ends of a circular shape in the diameter direction of the circular shape.

In a second alternative, the front projection of each collimator lens T in the collimator lens set 105 on the base 1011 may have a hexagonal shape. Fig. 6 is a schematic structural diagram of yet another laser according to an embodiment of the present application. Fig. 6 may also be a top view of the laser shown in fig. 2, and fig. 2 may also be a schematic view of the cross section b-b' of the laser shown in fig. 6. As shown in fig. 6, the orthographic projection of each collimator lens T in the collimator lens group 105 on the base 1011 has a hexagonal shape, and the maximum length of the hexagonal shape in the y direction is larger than the maximum length in the x direction. The hexagon may be an axisymmetric pattern, and one axis of symmetry of the hexagon may be parallel to the y-direction. Alternatively, the hexagon may also have another axis of symmetry, which may be parallel to the x-direction. For example, for a first collimator lens T in a first row, the symmetry axis of the collimator lens T may include straight lines Z1 and Z2, the symmetry axis Z1 being parallel to the y-direction and the symmetry axis Z2 being parallel to the x-direction. One symmetry axis of the hexagon is a straight line where one diagonal of the hexagon is located. The symmetry axis may also bisect two opposite corners of the hexagon. The diagonal lines in the hexagon as symmetry axes are parallel to the y-direction, and the symmetry axes may be straight lines Z1. In fig. 6, the collimating lenses are hexagonal, and adjacent sides of any adjacent collimating lenses coincide. The collimator lenses T in the collimator lens group may be referred to as a honeycomb arrangement.

In a third alternative, the collimator lens set 105 may include collimator lenses T of various shapes. Fig. 7 is a schematic structural diagram of a laser according to another embodiment of the present application. Fig. 7 may also be a top view of the laser shown in fig. 2, and fig. 2 may also be a schematic view of the cross section b-b' of the laser shown in fig. 7. As shown in fig. 7, the presence of three adjacent rows of collimator lenses T (the previous three rows) in the collimator lens group 105 satisfies the following condition: of the three rows of collimator lenses T, two rows of collimator lenses T (i.e., the first row and the third row) respectively located at both ends, the orthographic projection of each collimator lens T on the base 1011 is elliptical. The middle row of collimator lenses T includes collimator lenses T1 in the shape of a target in orthographic projection on the base plate 1011. The target shape is surrounded by six sides, such as sides a1, a2, a3, a4, a5 and a6, respectively, as shown in fig. 7 for the first collimating lens of the second row. The six sides include two parallel and opposite straight sides (i.e., a1 and a 4), two curved sides respectively connected to one ends of the two straight sides, and two curved sides respectively connected to the other ends of the two straight sides, the curved sides being concave toward the target shape. The two straight edges a1 and a4 are parallel to the y direction, the one end of the two straight edges is the upper end, and the other end of the two straight edges is the lower end. Therefore, two arc edges respectively connected with one ends of the two straight edges are edges a2 and a3, and two arc edges respectively connected with one ends of the two straight edges are edges a5 and a6.

With continued reference to fig. 7, optionally, for the collimating lens group 105 including the collimating lens T1 of the target shape, the collimating lens group 105 may further include a collimating lens T2 of an auxiliary shape. The auxiliary shape may be similar to the target shape, except that the edges of the collimator lens T2 of the auxiliary shape not adjacent to other collimator lenses are not curved edges but straight edges. For the points of the auxiliary shape that are the same as the target shape, please refer to the description of the target shape, and the embodiments of the present application will not be repeated. For example, the auxiliary shape of the collimator lens T2 may be located at an edge of the collimator lens group 105. As shown in fig. 7, the fourth row of collimator lenses T2 may have an auxiliary shape, and the right-most collimator lens T2 in the second row may have an auxiliary shape. Alternatively, the fourth collimating lens and the right-most collimating lens in the second row in fig. 7 may be in target shapes, which is not limited in the embodiment of the present application. Alternatively, the edge of the collimating lens T2 not adjacent to other collimating lenses may be a part of the edge of the ellipse as a whole, where the auxiliary shape corresponds to a part of the ellipse to be adjacent to other collimating lenses, and the part is changed to a straight edge or an inward concave arc edge, and the other part is not changed.

Alternatively, any two collimator lenses T respectively located in adjacent rows and adjacent in the collimator lens group 105 may be in contact. For example, please continue to refer to fig. 3, 5, 6 and 7, the first collimating lens T and the second collimating lens T in the first row are adjacent to the first collimating lens T in the second row; the lower ends of the first and second collimating lenses T in the first row may be in contact with the upper ends of the first collimating lenses T in the second row. As shown in fig. 3 and 5, when the collimator lens T has an elliptical shape or a capsule shape, only a small portion of the edges between two adjacent collimator lenses located in adjacent rows may be in contact. As shown in fig. 6 and 7, when the collimator lenses T are hexagonal, at least one edge of two adjacent collimator lenses located in adjacent rows may coincide. For example, the first collimating lens T of the first row has an edge coincident with the first collimating lens T of the second row. For the case of fig. 7, in the adjacent row of collimator lenses T, the edge of the collimator lens T1 of the target shape may coincide with the edge of the collimator lens T of the oval shape adjacent thereto in another row, and the edge of the collimator lens T2 of the auxiliary shape may also coincide with the edge of the collimator lens T of the oval shape adjacent thereto in another row.

Alternatively, any two collimating lenses located in the same row and adjacent to each other in the collimating lens group 105 may be in contact. For example, please continue to refer to fig. 3, 5, 6 and 7, edges of the first collimating lens T and the second collimating lens T in the first row that are close to each other are in contact. As shown in fig. 3 and 5, when the collimator lenses T are elliptical, only a small portion of edges between two collimator lenses T positioned in the same row and adjacent to each other may be in contact. E.g. the right edge of the first collimator lens T in the first row is in contact with the left edge of the second collimator lens T at only one point. As shown in fig. 6 and 7, when the collimator lens T is in a capsule shape or a hexagonal shape, at least one edge of two collimator lenses positioned in the same row and adjacent to each other may coincide. The right edge of the first collimator lens T coincides with the left edge of the second collimator lens T as in the first row. For the case of fig. 7, in any row of collimator lenses T having an elliptical shape, adjacent two collimator lenses T may contact only a small portion of edges; in any one row of collimator lenses of the target shape or auxiliary shape, the edges of two adjacent collimator lenses may coincide.

In the embodiment of the application, the adjacent collimating lenses can be in contact, for example, edges, which are close to each other, of the adjacent collimating lenses can be close to each other, so that the space utilization rate of the collimating lenses can be further improved, and the area waste of the collimating lens group is avoided. Optionally, a gap may also exist between adjacent collimating lenses in the collimating lens group, which is not limited in the embodiments of the present application.

It should be noted that, since each collimating lens in the collimating lens group of the laser is used for collimating the laser emitted by the corresponding light emitting component, in order to realize the normal operation of the laser, the laser emitted by each light emitting component needs to be ensured to be emitted to the corresponding collimating lens, so that the arrangement mode of the collimating lenses in the laser needs to be corresponding to the arrangement mode of the light emitting components. Fig. 8 is a schematic structural diagram of another laser according to another embodiment of the present application, fig. 8 may be a top view of the laser shown in fig. 2, and fig. 8 does not illustrate a light-transmitting sealing component and a collimating lens group in the laser. As shown in fig. 8, the plurality of light emitting modules 102 in the laser 10 are arranged in the same manner as the collimator lenses T in the collimator lens group 105 shown in fig. 3, 5, 6, and 7. That is, the light emitting elements 102 are arranged in a plurality of rows, and any two adjacent light emitting elements 102 are staggered. For the staggered arrangement of the light emitting components 102, reference may be made to the description of the staggered arrangement of the collimating lenses T in the embodiment of the present application, which is not repeated herein.

As shown in fig. 2 and 8, each light emitting assembly 102 may include a light emitting chip 1021, a heat sink 1022, and a reflective prism 1023. A heat sink 1022 may be disposed on the base plate 1011, the light emitting chip 1021 may be disposed on the heat sink 1022, the heat sink 1022 is for assisting the heat dissipation of the light emitting chip 1021, and the reflecting prism 1023 may be located at the light emitting side of the light emitting chip 1021. The laser light emitted from the light emitting chip 1021 may be directed to the reflecting prism 1023, and reflected on the reflecting prism 1023 to pass through the light-transmitting encapsulant 104, and then directed to the corresponding collimating lens T in the collimating lens group 105. The light emitting direction of the light emitting chip 1021 may be a column direction in which the light emitting components 102 are arranged, that is, a column direction in which the collimator lenses T in the collimator lens group 105 are arranged.

Alternatively, in the collimator lens group 105 of the laser 10, the collimator lenses T of the interval rows may be arranged in a staggered manner, or may be aligned in the column direction. The present embodiment takes the example that the spaced row collimator lenses T are aligned in the column direction. It should be noted that, in the embodiment of the present application, the interval row collimating lenses refer to two rows of collimating lenses that are spaced apart by one row in the middle; that is, in the collimator lens group 105, two rows of collimator lenses are located on both sides of any row of collimator lenses T in the column direction, and adjacent to the row of collimator lenses T. Illustratively, the first row of collimating lenses and the third row of collimating lenses in the collimating lens group 105 shown in fig. 3, 5, 6, and 7 are spaced apart rows of collimating lenses, and the first row of collimating lenses and the third row of collimating lenses are aligned in the column direction; the second row of collimating lenses and the fourth row of collimating lenses are also spaced apart rows of collimating lenses, the second row of collimating lenses and the fourth row of collimating lenses being aligned in the column direction. The two rows of collimating lenses are aligned, namely two adjacent collimating lenses in the two rows are respectively positioned right below one another, and the connecting line of the two collimating lenses is parallel to the column direction.

Alternatively, the number of collimating lenses T in each row of the collimating lens group 105 in the embodiment of the present application is equal. As shown in fig. 3, 5, 6 and 7, the number of collimating lenses T in each row of the collimating lens group 105 is seven. Alternatively, the number of different rows of collimator lenses T may be unequal. It should be noted that the number of the collimating lenses T in the collimating lens group 105 may be determined according to the setting requirements of the light emitting components 102 in the package 101. If the brightness of the laser 10 needs to be achieved by 20 light emitting chips, the laser 10 needs to include 20 light emitting components 102, and correspondingly, the collimating lens group 105 needs to include 20 collimating lenses T. Optionally, in the package 101, the number of light emitting components 102 located in the middle area is smaller than the number of light emitting components 102 located in the edge area. Accordingly, in the collimator lens group 105, the number of collimator lenses T per line located in the middle area may be smaller than the number of collimator lenses T per line in the edge area. Alternatively, the pitch of any two light emitting chips adjacent in the row direction may be equal.

The light-emitting chip in the light-emitting component can generate heat when emitting light, and the heat can be diffused to the surrounding. The range overlapping degree that the heat generated by the light-emitting chip in the middle area of the bottom plate can be diffused is higher, the heat accumulation in the middle area is obvious, and the probability of the heat damage of the light-emitting chip is higher. The heat generated by the light-emitting chip in the edge area can be diffused to the outer area of the bottom plate, where the light-emitting chip is not arranged, the heat dissipation area of the light-emitting chip is large, the heat generated by the light-emitting chip can be conducted faster due to the fact that the heat is not generated in the outer area. The number of light emitting chips in the middle region is smaller than that in the edge region. Therefore, the heat emitted by the light-emitting chips in the middle area can be reduced, the heat received by the middle area of the bottom plate is reduced, the heat density of unit area is reduced, the heat dissipation area of each light-emitting chip in the middle area is increased, the heat in the middle area is conveniently and rapidly dissipated, the probability that the light-emitting chips in the middle area are damaged due to heating is reduced, and the reliability of the laser is improved.

Alternatively, fig. 9 is a schematic structural diagram of a collimating lens group according to an embodiment of the present application, where the collimating lens group 105 in fig. 2 may be a right side view of the collimating lens group shown in fig. 9, and fig. 9 is illustrated by taking the collimating lens group 105 in the case shown in fig. 5 as an example. The collimator lens set 105 may be integrally formed. The collimating lens group 105 may have a light incident surface M1 and a light emergent surface M2, where the light incident surface M1 and the light emergent surface M2 are two opposite surfaces of the collimating lens group 105, and the light incident surface M1 is close to the tube housing 101 relative to the light emergent surface M2. The light incident surface M1 of the collimating lens group 105 includes a first surface D1 of each collimating lens in the collimating lens group 105, and the light emitting surface M2 includes a second surface D2 of each collimating lens. As shown in fig. 9, the light emitting surface M2 of the collimating lens group 105 has a plurality of convex arc surfaces, and a portion of the collimating lens group 105 where each convex arc surface is located is a collimating lens T.

In this embodiment, as shown in fig. 3 and fig. 5 to 8, opposite sides of the sidewall 1012 may have a plurality of openings, and the laser 10 may further include: the plurality of conductive pins 106 may extend into the accommodating space of the package 101 through the openings in the sidewall 1012, and further be fixed to the sidewall 1012. The conductive pins 106 may be electrically connected to electrodes of the light emitting chip 1021 to transmit an external power to the light emitting chip 1021, so as to excite the light emitting chip 1021 to emit laser. The light-transmitting sealing component is used for sealing the opening of the tube shell 101, so that the accommodating space of the tube shell 101 is a closed space. The light-emitting chip 1021 is located in the closed space, so that the corrosion of external water and oxygen to the light-emitting chip 1021 can be prevented, the service life of the light-emitting chip 1021 can be prolonged, and the light-emitting effect of the light-emitting chip 1021 is ensured. The light transmissive sealing assembly may also be referred to as a cover assembly.

Optionally, in this embodiment of the present application, the material of the tube shell may be copper, such as oxygen-free copper, the material of the transparent sealing layer may be glass, and the material of the sealing cover plate may be stainless steel. It should be noted that, copper's coefficient of heat conductivity is great, and the material of tube shell is copper in this application embodiment, so can guarantee that the luminous chip that sets up on the bottom plate of tube shell can conduct through the tube shell fast in the heat that during operation produced, and then give off fast, avoids the damage of heat gathering to luminous chip. Optionally, the material of the shell may be one or more of aluminum, aluminum nitride and silicon carbide. In this embodiment, the sealing cover plate may be made of other kovar materials, such as an iron-nickel-cobalt alloy or other alloys. The material of the transparent sealing layer may be other transparent material with high reliability, such as resin material.

Alternatively, in the embodiment of the application, when the laser is assembled, each annular sealing insulator may be sleeved on each conductive pin, and then the conductive pin sleeved with the annular sealing insulator penetrates into the opening of the side wall, and the annular sealing insulator is located in the opening. And then placing the side wall on the bottom plate, placing annular solder (such as silver-copper solder) between the side wall and the bottom plate, placing the structure of the bottom plate, the side wall and the conductive pins in a high-temperature furnace for sealing and sintering, and sealing and sintering to form a whole (namely a base assembly) by the bottom plate, the side wall, the conductive pins and the solder after curing, wherein the airtight of the opening of the side wall is realized. The light-transmitting sealing layer and the sealing cover plate can be fixed through the sealing material, so that the light-transmitting sealing assembly is obtained. The heat sink, light emitting chip and reflecting prism may then be soldered to corresponding locations on the base plate, followed by soldering the light transmissive sealing assembly to the surface of the sidewall remote from the base plate using a parallel soldering technique. And finally, after aligning the positions of the collimating lens groups, fixing the collimating lens groups on one side of the upper cover component, which is far away from the bottom plate, through epoxy glue, so as to complete the assembly of the laser. It should be noted that the above assembly process is only an exemplary process provided in the embodiments of the present application, and the welding process adopted in each step may be replaced by other processes, and the sequence of each step may also be adapted to be adjusted, which is not limited in the embodiments of the present application.

In the above embodiments, the bottom plate and the side wall of the package are taken as two separate structures to be assembled. Alternatively, the bottom panel and the side wall may be integrally formed. So can avoid bottom plate and lateral wall to produce the fold because the bottom plate that the coefficient of thermal expansion of bottom plate and lateral wall is different when high temperature welding leads to, and then can guarantee the planarization of bottom plate, guarantee the setting reliability of luminescent chip on the bottom plate, and guarantee the light that luminescent chip sent and export according to predetermined luminous angle, improve the luminous effect of laser instrument.

It should be noted that in the present embodiments, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The term "at least one" refers to one or more. The term "plurality" refers to two or more, unless explicitly defined otherwise. The term "at least one of a and B" in this application is merely an association relationship describing an association object, and means that three relationships may exist, for example, at least one of a and B may mean: a exists alone, A and B exist together, and B exists alone. The term "and/or" is merely an association relationship describing an associated object, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone.

The "parallel" in the embodiments of the present application may not be exactly perfectly parallel, but may also have a certain error, and only needs to ensure that they are approximately parallel. "approximately" and "approximately" mean within an acceptable error range that a person skilled in the art can solve the technical problem to be solved within a certain error range, substantially achieving the technical effect to be achieved. In the drawings, the size of layers and regions may be exaggerated for clarity of illustration. Moreover, it will be understood that when an element or layer is referred to as being "on" another element or layer, it can be directly on the other element or intervening layers may be present. Like reference numerals refer to like elements throughout.

The foregoing description of the preferred embodiments is merely exemplary in nature and is in no way intended to limit the invention, since it is intended that all modifications, equivalents, improvements, etc. that fall within the spirit and scope of the invention.

Claims

1. A laser, the laser comprising: the light-emitting device comprises a bottom plate, annular side walls, a plurality of light-emitting components, a light-transmitting sealing component and a collimating lens group;

the collimating lens group comprises a plurality of collimating lenses which are in one-to-one correspondence with the plurality of luminous components, and the plurality of collimating lenses are arranged in a plurality of rows; the maximum length of each collimating lens in the column direction is greater than the maximum length in the row direction;

orthographic projection of each collimating lens on the bottom plate is in a capsule shape; the capsule shape is formed by two opposite parallel straight edges and two opposite arc edges;

and the number of the collimating lenses of different rows is not equal and the interval between any two adjacent light emitting chips in the row direction is equal.

2. The laser of claim 1, wherein a number of the plurality of light emitting elements in the middle region is less than a number of the plurality of light emitting elements in the edge region, and accordingly, a number of the collimating lenses in each row in the middle region is less than a number of the collimating lenses in each row in the edge region in the collimating lens group.

3. The laser of claim 1, wherein each of the light emitting assemblies comprises a light emitting chip, a heat sink and a reflecting prism, the heat sink is disposed on the base plate, the light emitting chip is disposed on the heat sink, the reflecting prism is located on a light emitting side of the light emitting chip, and laser light emitted from the light emitting chip is directed to the reflecting prism and reflected on the reflecting prism to pass through the light transmitting sealing layer and be directed to a corresponding collimating lens in the collimating lens group.

4. The laser of claim 1, wherein two collimating lens part edges respectively located in adjacent rows and adjacent to each other in the collimating lens group are in contact.

5. The laser of claim 1, wherein at least one edge of two collimating lenses in a same row and adjacent to each other in the collimating lens group are coincident.

6. A laser according to any one of claims 1 to 3, wherein the collimating lens groups are respectively located at two sides of any row of collimating lenses, and two rows of collimating lenses adjacent to any row of collimating lenses are arranged in a staggered manner.

7. A laser as claimed in any one of claims 1 to 3 wherein the collimating lens groups are located on either side of any one of the rows of collimating lenses, respectively, and two rows of collimating lenses adjacent to the any one of the rows of collimating lenses are aligned in the column direction.

8. The laser of claim 1, wherein the collimating lens group is integrally formed, and/or the collimating lens has an incident surface and an emergent surface opposite to each other, and the emergent surface is a convex arc surface.

9. A laser as in claim 3 wherein the side wall has a plurality of openings on opposite sides thereof, the laser comprising: and the plurality of conductive pins respectively penetrate through the openings in the side wall and are electrically connected with the electrodes of the light emitting chip.

10. The laser of claim 1, wherein the bottom plate and the side walls enclose a package; the sealing cover plate in the light-transmitting sealing assembly is annular, the outer edge of the sealing cover plate is fixed on the side of the opening of the tube shell, and the edge of the light-transmitting sealing layer is fixed with the inner edge of the sealing cover plate; the edge of the collimating lens group is adhered to the outer edge of the sealing cover plate through an adhesive.

11. The laser of claim 1, wherein a slow axis direction of the laser spot emitted by each of the light emitting assemblies is parallel to a column direction of the corresponding collimating lens and a fast axis direction is parallel to a row direction of the corresponding collimating lens.

12. The laser of claim 1, wherein the laser further satisfies at least one of the following conditions:

the bottom plate is made of oxygen-free copper;

the side wall is made of kovar material or copper;

the sealing light-transmitting layer is made of glass or resin;

the bottom plate and the side wall are integrally formed.