Laser module and laser light source

Abstract

The utility model discloses a laser module and a laser light source, and relates to the technical field of optics, the laser module comprises a chip and a lens which are sequentially arranged along an optical axis, the lens is located in the light emitting direction of the chip, and the chip is embedded in the light incident surface of the lens; the light-emitting surface of the lens is used for collimating light beams emitted by the chip in the first direction and the second direction and forming linear light spots after the light beams are diverged in the second direction, and the first direction, the second direction and the optical axis are perpendicular to one another. According to the laser module and the laser light source provided by the invention, the integrity of the laser module can be improved, and the cost is reduced.

Description

Technical Field

[0001] The present application relates to the field of optical technology, and in particular to a laser module and a laser light source. Background Art

[0002] Laser modules, devices capable of emitting laser light, are widely used in daily life, medical equipment, industrial production, and other fields. With the development of various optical sensor applications, various light pattern requirements have emerged based on actual needs, such as homogenized surface light fields, dot-matrix speckle light fields, and linear light fields. Line laser projectors, used to project linear light fields, are widely used due to their strong anti-interference performance and stable performance.

[0003] In the prior art, a linear spot light field is emitted by a line laser module. Specifically, a line laser module is typically composed of a light source, a collimating element, and a wave mirror sequentially arranged on the light-emitting side of the light source. The laser beam emitted by the light source is collimated by the collimating element to form a collimated circular spot, which is then incident on the wave mirror. The wave mirror is formed by multiple cylindrical surfaces connected in sequence along a certain direction. The wave mirror stretches the circular spot. Specifically, along the axial direction of the cylindrical surface, the divergence angle of the spot remains unchanged. Along the arrangement direction of the multiple cylindrical surfaces, the spot is stretched to form a linear spot. In the prior art, the line laser module includes a light source, a collimating element, and a wave mirror. This results in a large number of components in the laser module, which takes a long time to assemble and increases costs. Utility Model Content

[0004] The purpose of this application is to provide a laser module and a laser light source, which can improve the integrity of the laser module and reduce costs.

[0005] On the one hand, an embodiment of the present application provides a laser module, including a chip and a lens arranged in sequence along an optical axis, the lens is located in the light-emitting direction of the chip, and the chip is embedded in the light-incident surface of the lens, and the light-emitting surface of the lens is used to collimate the light beam emitted by the chip along a first direction and a second direction and to diverge along the second direction to form a linear light spot, and the first direction, the second direction and the optical axis are perpendicular to each other.

[0006] As an implementable manner, the side of the lens away from the chip is a protrusion, and the end surface of the protrusion serves as the light-emitting surface of the lens.

[0007] As an implementable manner, an edge line of a cross section of the light emitting surface of the lens along the first direction is an arc, and an edge line of a cross section of the light emitting surface along the second direction is a wavy line.

[0008] As an implementable manner, the wave line includes at least two troughs.

[0009] As an implementable manner, the light-emitting surface of the lens is symmetrical about a first reference plane, the first reference plane is parallel to the second direction, and the optical axis is located on the first reference plane.

[0010] As an implementable manner, the light-emitting surface of the lens is symmetrical about a second reference plane, the second reference plane is parallel to the first direction, and the optical axis is located on the second reference plane.

[0011] As an implementable manner, the laser module further includes a substrate having a driving circuit, the chip is disposed on the substrate, and the driving circuit is connected to the chip.

[0012] As an implementable manner, the lens is an injection-molded lens that is injection-molded on the substrate.

[0013] As an implementable manner, light beams are emitted from a plurality of points on the chip, and the plurality of points are arranged along the second direction.

[0014] Another aspect of an embodiment of the present application provides a laser light source, including a housing and the above-mentioned laser module disposed in the housing.

[0015] The beneficial effects of the embodiments of the present application include:

[0016] The laser module provided by the present application includes a chip and a lens arranged in sequence along the optical axis. The lens is located in the light-emitting direction of the chip, and the chip is embedded in the light-entering surface of the lens. The light beam emitted by the chip enters the lens from the light-entering surface of the lens and propagates along the inside of the lens to the light-exiting surface of the lens. At the light-exiting surface of the lens, the light-exiting surface of the lens is used to collimate the light beam emitted by the chip along the first direction and the second direction and diverge along the second direction to form a linear light spot. The first direction, the second direction and the optical axis are perpendicular to each other. After the light beam is collimated and diverged by the light-exiting surface, it is emitted to form a linear light spot. Specifically, the light-exiting surface collimates the light beam in the first direction and the second direction, and diverges in the second direction, so that one lens can collimate and emit the light beam, and the chip is embedded in the light-entering surface of the lens, thereby improving the integrity of the laser module and reducing time costs during the assembly process. Therefore, the laser module of the embodiment of the present application can improve the integrity of the laser module and reduce costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 This is one of the structural schematic diagrams of a laser module provided in an embodiment of the present application;

[0019] Figure 2 This is a second structural diagram of a laser module provided in an embodiment of the present application;

[0020] Figure 3 A cross-sectional view of a laser module along a first plane provided in an embodiment of the present application;

[0021] Figure 4 A cross-sectional view of a laser module along a second plane provided in an embodiment of the present application;

[0022] Figure 5 A schematic diagram of the structure of a chip of a laser module provided in an embodiment of the present application.

[0023] Icon: 100-laser module; 110-substrate; 120-chip; 130-lens; 131-light output surface. DETAILED DESCRIPTION

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0025] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application without creative work are within the scope of protection of the present application.

[0026] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0027] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect" and "connect" should be understood in a broad sense. For ordinary technicians in this field, they can understand the specific meanings of the above terms in this application according to specific circumstances.

[0028] A line laser module usually refers to a laser that produces a straight line light spot. This type of laser is used in many applications, such as industrial measurement, construction, positioning and alignment, scientific research, and entertainment performances. Specifically, a circular light spot diverges in the first direction, and a linear light spot is formed by keeping the angle unchanged in the second direction. The existing line laser module includes a chip that emits a laser beam, and a collimator and a wave mirror sequentially arranged on the light-emitting side of the chip. The collimator collimates the laser beam to form a circular light spot, and the wave mirror diverges the circular light spot in one direction and keeps the divergence angle unchanged in the other direction, thereby forming a linear light spot.

[0029] This application provides a laser module 100, such as Figure 1 and Figure 2 As shown, it includes a chip 120 and a lens 130 arranged in sequence along the optical axis. The lens 130 is located in the light-emitting direction of the chip 120, and the chip 120 is embedded in the light-incident surface of the lens 130. The light-emitting surface 131 of the lens 130 is used to collimate the light beam emitted by the chip 120 along the first direction and the second direction and to diverge along the second direction to form a linear light spot. The first direction, the second direction and the optical axis are perpendicular to each other.

[0030] The laser module 100 provided in an embodiment of the present application is used to emit a linear laser beam to form a linear spot. Specifically, the laser module 100 includes a chip 120 and a lens 130 arranged in sequence along the optical axis. The lens 130 is located in the light-emitting direction of the chip 120. When the chip 120 emits a light beam, the light beam enters the lens 130 from the light-incident surface of the lens 130 and propagates inside the lens 130 to the light-emitting surface 131. The light-emitting surface 131 is used to perform two processing operations on the light beam: the first is to collimate the light beam, including a first direction and a second direction; the second is to diverge the light beam along the second direction, so that the light beam processed by the light-emitting surface 131 forms a linear spot.

[0031] According to the working principle of the laser module 100 described above, the embodiment of the present application utilizes the light-emitting surface 131 of the lens 130 to collimate the light beam and diverge it in a second direction, thus achieving the collimation and divergence functions. That is, a single lens 130 in the embodiment of the present application can achieve both the collimation and divergence functions, thereby reducing the number of optical components in the laser module 100 and improving the integrity of the laser module 100. In addition, in the embodiment of the present application, the chip 120 is embedded in the light-entering surface of the lens 130, which, on the one hand, further improves the integrity of the laser module 100; on the other hand, when assembling the laser module 100, it is only necessary to place the chip 120 on the light-entering surface of the lens 130. This simplifies the assembly process and reduces the number of steps, thereby reducing the time cost during assembly.

[0032] The laser module 100 provided in the present application includes a chip 120 and a lens 130 arranged in sequence along the optical axis. The lens 130 is located in the light-emitting direction of the chip 120, and the chip 120 is embedded in the light-incident surface of the lens 130. The light beam emitted by the chip 120 enters the lens 130 from the light-incident surface of the lens 130, and propagates along the inside of the lens 130 to the light-emitting surface 131 of the lens 130. At the light-emitting surface 131 of the lens 130, the light-emitting surface 131 of the lens 130 is used to collimate the light beam emitted by the chip 120 along the first direction and the second direction, and to diverge along the second direction to form a linear light spot. The first direction, the second direction and the optical axis are perpendicular to each other. The light beam is collimated and diverged by the light-emitting surface 131 and then emitted to form a linear light spot. Specifically, the light-emitting surface 131 collimates the light beam in the first direction and the second direction, and diverges the light beam in the second direction, so that a lens 130 can collimate and emit the light beam, and the chip 120 is embedded in the light-incident surface of the lens 130, thereby improving the integrity of the laser module 100 and reducing time costs during the assembly process. Therefore, the laser module 100 of the embodiment of the present application can improve the integrity of the laser module 100 and reduce costs.

[0033] Optional, such as Figure 1 and Figure 2 As shown, the side of the lens 130 away from the chip 120 is a protrusion, and the end surface of the protrusion serves as the light-emitting surface 131 of the lens 130 .

[0034] In practical applications, the convex lens 130 is usually used for collimating the light beam. Based on the effect of the light emitting surface 131 on the collimation of the light beam, the side of the lens 130 in the embodiment of the present application away from the chip 120 is a protrusion, and the end face of the protrusion serves as the light emitting surface 131 of the lens 130, so that the light emitting surface 131 convexly bends outward, thereby achieving collimation of the light beam.

[0035] In one possible implementation of the embodiment of the present application, Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown, the edge line of the cross section of the light emitting surface 131 of the lens 130 along the first direction is an arc, and the edge line of the cross section of the light emitting surface 131 along the second direction is a wavy line.

[0036] Specifically, such as Figure 3 As shown, the edge line of the cross section along the first direction is arc-shaped, so that in the first direction, the light emitting surface 131 can collimate the light beam, realizing the collimation function of the light emitting surface 131 in the first direction.

[0037] like Figure 4 As shown, the edge line of the cross section along the second direction is a wavy line, so that in the second direction, the light emitting surface 131 can diverge the light beam, realizing the divergence function of the light emitting surface 131 in the second direction.

[0038] In addition, since the light emitting surface 131 collimates the light beam in the first direction and the second direction, the light emitting surface 131 needs to be able to collimate the light beam in the second direction. At this time, the wavy line can be bent along the arc to obtain the following: Figure 1 and Figure 2 The light emitting surface 131 shown realizes collimation in the second direction.

[0039] As can be seen from the above, the light emitting surface 131 is a convex spherical surface as a whole, and there is a wavy surface distribution in the second direction to achieve the divergence of the collimated light beam.

[0040] Optionally, the wave line includes at least two troughs.

[0041] To enhance the divergence of the light emitting surface 131, the wave line in this embodiment includes at least two troughs. Thus, the crests and troughs of the wave line cause the light beam to bend to varying degrees, thereby achieving light beam divergence. Providing at least two troughs further enhances light beam divergence and improves the uniformity of the linear light spot.

[0042] In one implementable manner of the embodiment of the present application, the light-emitting surface 131 of the lens 130 is symmetrical about a first reference plane, the first reference plane is parallel to the second direction, and the optical axis is located on the first reference plane.

[0043] Optionally, the light-emitting surface 131 of the lens 130 is symmetrical about a second reference plane, the second reference plane is parallel to the first direction, and the optical axis is located on the second reference plane.

[0044] The light-emitting surface 131 of the lens 130 is configured as a plane-symmetrical figure, with the optical axis located on the first reference plane and the second reference plane, so that the optical axis is located on the central vertical line of the light-emitting surface 131. This makes the light-emitting surface 131 symmetrical with respect to the collimation of the light beam, thereby improving the uniformity of the light output. Similarly, the light-emitting surface 131 is also symmetrical with respect to the divergence of the light beam, thereby improving the uniformity of the light output and thus improving the quality of the linear light spot.

[0045] In one possible implementation of the embodiment of the present application, the laser module 100 further includes a substrate 110 having a driving circuit. The chip 120 is disposed on the substrate 110 , and the driving circuit is connected to the chip 120 .

[0046] To facilitate providing a driving source for chip 120, the laser module 100 of the present embodiment further includes a substrate 110 having a driving circuit. Chip 120 is disposed on substrate 110 and connected to the driving circuit to drive chip 120 to emit a light beam. In addition to driving chip 120, substrate 110 also provides support for the backside of chip 120 to protect it.

[0047] In addition, in order to further improve the integrity of the laser module 100, the chip 120 is connected to the substrate 110 by patch connection. In this way, on the one hand, the chip 120 is adhered to the substrate 110, making the chip 120 and the substrate 110 an integrated structure, thereby improving the integrity of the laser module 100; on the other hand, it facilitates the electrical connection between the chip 120 and the substrate 110.

[0048] Optionally, the lens 130 is an injection-molded lens 130 that is injection-molded on the substrate 110 .

[0049] The lens 130 is an injection-molded lens 130 on the substrate 110, so that during the process of injection molding the lens 130, the lens 130 can be connected to the substrate 110, thereby reducing the steps when assembling the laser module 100; in addition, the injection molding process makes the connection between the lens 130 and the substrate 110 more secure.

[0050] During the injection molding process, the substrate 110 provided with the chip 120 is used as the base plate, the mold and the substrate 110 are interlocked to form an injection molding space, the injection molding material is injected into the injection molding space, and curing conditions for the injection molding material are provided so that the injection molding material can be cured to form the injection molding lens 130, which is convenient and fast and can achieve mass production.

[0051] Specifically, the injection molding material for forming the lens 130 is not limited in the embodiment of the present application, and those skilled in the art can make a specific selection based on actual conditions, as long as it can transmit the light beam and has a preset refractive index.

[0052] In one possible implementation of the embodiment of the present application, Figure 5 As shown, light beams are emitted from a plurality of points on the chip 120 , and the plurality of points are arranged along the second direction.

[0053] According to actual needs, multiple points are required to emit light beams to increase the length of the linear light spot. At this time, the multiple points are arranged along the second direction so that the multiple points are arranged in sequence in the divergent direction.

[0054] The present application also discloses a laser light source comprising a housing and the aforementioned laser module 100 disposed within the housing. This laser light source exhibits the same structure and benefits as the laser module 100 in the aforementioned embodiment. The structure and benefits of the laser module 100 have been described in detail in the aforementioned embodiment and will not be further elaborated here.

[0055] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A laser module, characterized in that: The optical system comprises a chip and a lens arranged in sequence along the optical axis, wherein the lens is located in the light-emitting direction of the chip, and the chip is embedded in the light-incident surface of the lens. The light-emitting surface of the lens is used to collimate the light beam emitted by the chip along the first direction and the second direction and to diverge along the second direction to form a linear light spot. The first direction, the second direction and the optical axis are perpendicular to each other.

2. The laser module according to claim 1, wherein: A side of the lens away from the chip is a convex portion, and an end surface of the convex portion serves as a light-emitting surface of the lens.

3. The laser module according to claim 2, characterized in that: An edge line of a cross section of the light emitting surface of the lens along the first direction is arc-shaped, and an edge line of a cross section of the light emitting surface along the second direction is a wavy line.

4. The laser module according to claim 3, characterized in that: The wavy line includes at least two troughs.

5. The laser module according to claim 1, wherein: The light-emitting surface of the lens is symmetrical about a first reference plane, the first reference plane is parallel to the second direction, and the optical axis is located on the first reference plane.

6. The laser module according to claim 1, wherein: The light-emitting surface of the lens is symmetrical about a second reference plane, the second reference plane is parallel to the first direction, and the optical axis is located on the second reference plane.

7. The laser module according to claim 1, wherein: The laser module further includes a substrate having a driving circuit. The chip is disposed on the substrate, and the driving circuit is connected to the chip.

8. The laser module according to claim 7, characterized in that: The lens is an injection-molded lens that is injection-molded on the substrate.

9. The laser module according to claim 1, wherein: Light beams are emitted from a plurality of points on the chip, and the plurality of points are arranged along the second direction.

10. A laser light source, characterized in that: The invention comprises a shell and a laser module according to any one of claims 1 to 9 arranged in the shell.

Images