CN220305492U - Laser emitting device and laser radar - Google Patents

Abstract

The embodiment of the application relates to the technical field of radars and discloses a laser emission device and a laser radar, wherein the laser emission device comprises: a PCB board; a substrate; the light emitting part is arranged on the PCB and used for emitting laser to a target area; the fixing piece is arranged on the PCB and comprises a middle plate, and a first vertical plate and a second vertical plate which are respectively connected with two ends of the middle plate and are oppositely arranged; the first lens is fixed with at least one plate among the middle plate, the first vertical plate and the second vertical plate, and is used for receiving the laser emitted by the light emitting part and compressing the divergence angle of the received laser; the second lens is arranged on the substrate and is used for receiving the laser after the divergence angle of the laser is compressed and the received laser is expanded. By the mode, the offset degree of the laser output by the laser emitting device is reduced.

Description

Laser emitting device and laser radar

Technical Field

The embodiment of the application relates to the technical field of radars, in particular to a laser emitting device and a laser radar.

Background

The laser radar is a system for detecting the position, speed and other characteristic quantities of a target object by using laser, and the working principle of the laser radar is that a laser emitting device firstly emits the laser for detection to the target object, then a laser receiving device receives the laser reflected from the target object, and relevant information of the target object, such as parameters of distance, azimuth, height, speed, gesture, even shape and the like, can be obtained after the received laser is processed. The laser emission device has a key effect on whether the laser radar can effectively detect the target object, and if the laser emitted by the laser emission device deviates, the emitted laser cannot reach the target object, and the detection of the target object cannot be completed.

Since different components in a lidar may be made of different materials with different coefficients of thermal expansion (Coefficient of thermal expansion, CTE) between the different materials, components made of different CTE materials typically deform differently when the lidar is in a high or low temperature operating environment. If the fixing members with different CTEs for fixing the different optical elements are deformed differently, the optical elements fixed on the fixing members with different CTEs are displaced relatively, so that the laser emitted by the laser emitting device is shifted and cannot reach the target. Therefore, how to reduce the degree of offset of the laser emitted by the laser emitting device when the laser radar is in a high-temperature or low-temperature working environment is a problem to be solved.

Disclosure of Invention

In view of the above-mentioned problems, embodiments of the present application provide a laser emitting device and a laser radar, which are used for solving the problem that after a fixing piece of an optical element in the laser radar is deformed, laser emitted by the laser emitting device is offset.

According to an aspect of the embodiments of the present application, there is provided a laser emitting apparatus including: a PCB board; a substrate; the light emitting part is arranged on the PCB and used for emitting laser to a target area; the fixing piece is arranged on the PCB and comprises a middle plate, and a first vertical plate and a second vertical plate which are respectively connected with two ends of the middle plate and are oppositely arranged; the first lens is fixed with at least one plate among the middle plate, the first vertical plate and the second vertical plate, and is used for receiving the laser emitted by the light emitting part and compressing the divergence angle of the received laser; the second lens is arranged on the substrate and is used for receiving the laser after the divergence angle of the laser is compressed and the received laser is expanded.

In an optional manner, at least part or all of at least one of the middle plate, the first vertical plate and the second vertical plate exceeds the outer edge of the PCB, the first lens is fixed on the part of the fixing piece exceeding the outer edge, wherein the outer edge is the outer edge of the area on the PCB where the light-emitting portion is arranged, and the outer edge is located on the light-emitting side of the light-emitting portion.

In an alternative manner, the first lens includes a first side and a second side, wherein the first side and the second side are fixed with the first riser and the second riser, respectively.

In an optional manner, the middle plate is disposed on a back surface of the light emitting side of the light emitting portion or is erected in a vertical direction of the light emitting portion, and the first vertical plate and the second vertical plate are disposed on two sides of the light emitting portion; the first vertical plate and the second vertical plate respectively deviate from one end of the middle plate and extend towards the transmission direction of the laser until exceeding the outer edge of the PCB, the first vertical plate and the second vertical plate respectively exceed the outer edge to form a first fixed end and a second fixed end, the first side face and the second side face are respectively fixed on the first fixed end and the second fixed end, wherein the outer edge is the outer edge of the area of the light-emitting part arranged on the PCB, and the outer edge is positioned on the light-emitting side of the light-emitting part.

In an optional manner, the fixing piece is covered on the PCB board, and a space is provided between the middle board and the light emitting portion in the vertical direction; the first vertical plate and the second vertical plate extend towards the transmission direction of the laser until the first vertical plate and the second vertical plate extend beyond the outer edge of the PCB, and a third fixed end and a fourth fixed end are respectively formed at the parts of the first vertical plate and the second vertical plate beyond the outer edge, wherein the outer edge is the outer edge of the area on the PCB where the light-emitting part is arranged, and the outer edge is positioned at the light-emitting side of the light-emitting part; the first side surface and the second side surface are respectively fixed to the third fixed end and the fourth fixed end.

In an optional mode, a notch facing the transmission direction of the laser is formed in the outer edge of the PCB, and the first vertical plate and the second vertical plate are respectively fixed on two opposite sides of the notch, where the first side and the second side are respectively fixed on the first vertical plate and the second vertical plate.

In an optional manner, the respective end portions of the first vertical plate and the second vertical plate extend towards the outer side of the notch in a horizontal plane respectively to form a first hanging lug and a second hanging lug, and the first hanging lug and the second hanging lug are respectively arranged on the PCB board.

In an alternative form, the first lens includes an end face, wherein the end face is fixed with the midplane.

In an optional manner, the fixing piece is covered on the PCB board, and a space is provided between the middle board and the light emitting portion in the vertical direction; the middle plate extends towards the transmission direction of the laser until the middle plate exceeds the outer edge of the PCB, a fifth fixed end is formed at the part of the middle plate exceeding the outer edge, and the end face is fixed at the fifth fixed end, wherein the outer edge is the outer edge of the area of the light emitting part arranged on the PCB, and the outer edge is positioned at the light emitting side of the light emitting part.

According to another aspect of the embodiments of the present application, there is provided a laser radar, including a laser emitting device as described above, and further including a laser receiving device, where the laser emitting device is configured to emit laser light to a target area, and the laser receiving device is configured to receive reflected laser light from the target area.

In this application provided laser emission device embodiment, through design the laser emission device for including being used for compressing the first lens of laser divergence angle and being used for carrying out the second lens that expands the beam to laser, thereby reduce the volume of first lens, and then under the circumstances that does not influence laser emission device's structure reliability, it is fixed with first lens and PCB board through the mounting, when making laser emission device be in high temperature or low temperature operational environment, can avoid or reduce the relative displacement between play light portion and the first lens that set up equally on the PCB board, thereby reduce the laser offset degree of first lens output, in order to make laser emission device output's laser can accurately reach the target object.

Further, in the embodiment of the laser emission device provided by the application, because the fixing piece includes the medium plate, the first riser and the second riser, one end of the first riser and one end of the second riser are respectively connected with the medium plate, and the first riser and the second riser are oppositely arranged, so that when the fixing piece is fixed on the PCB, at least two boards among the medium plate, the first riser and the second riser are fixed on the PCB, compared with the mode of fixing the first lens and the PCB only through the single board (namely, the mode that one end of the single board is fixed on the PCB, the other end extends towards the transmission direction of the laser until exceeding the outer edge of the PCB, and the first lens is fixed on the part of the single board beyond the outer edge of the PCB), the contact area between the fixing piece and the PCB is increased, and the fixing piece can be stably fixed on the PCB, so that the fixing piece can stably fix the first lens and the PCB.

The foregoing description is only an overview of the technical solutions of the embodiments of the present application, and may be implemented according to the content of the specification, so that the technical means of the embodiments of the present application can be more clearly understood, and the following detailed description of the present application will be presented in order to make the foregoing and other objects, features and advantages of the embodiments of the present application more understandable.

Drawings

The drawings are only for purposes of illustrating embodiments and are not to be construed as limiting the application. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:

fig. 1 shows a schematic structural diagram of a laser emitting device provided in an embodiment of the present application;

fig. 2 is a schematic diagram showing a partial structure of a laser emitting device according to an embodiment of the present application;

FIG. 3 is a schematic view showing a partial structure of a laser emitting device according to another embodiment of the present application;

fig. 4 is a schematic view showing a partial structure of a laser emitting device according to still another embodiment of the present application;

fig. 5 is a schematic view showing a partial structure of a laser emitting device according to still another embodiment of the present application;

FIG. 6 is a schematic view showing a partial structure of a laser emitting device according to still another embodiment of the present application;

fig. 7 shows a schematic diagram of a lidar structure according to an embodiment of the present application.

Reference numerals in the specific embodiments are as follows:

110. a PCB board; 120. a substrate; 130. a light emitting section; 140. a fixing member; 150. a first lens; 160. a second lens;

111. a notch;

141. a middle plate; 142. a first vertical plate; 143. a second vertical plate; 144. a first hanger; 145. a second hanger;

151. a first side; 152. a second side;

1421. a first fixed end; 1431. and a second fixed end.

Detailed Description

Exemplary embodiments of the present application will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present application are shown in the drawings, it should be understood that the present application may be embodied in various forms and should not be limited to the embodiments set forth herein.

As described in the background, since different components in a lidar may be made of different materials, when the lidar is in a high-temperature or low-temperature working environment, different CTE fixing components for fixing different optical elements are prone to different deformations, resulting in relative displacement of different optical elements fixed to different fixing components. For example, the light emitting part of the laser emitting device is usually required to be arranged on a circuit board (Printed Circuit Board, PCB) so that the light emitting part can emit laser light, the circuit board is usually arranged on a substrate (for example, a rack of a laser radar), and the laser light emitted by the light emitting part is collimated by a collimating mirror and then output to a target object. For a laser emission device comprising only one collimating lens, because the volume of the collimating lens is larger, the collimating lens is usually arranged on a substrate to meet the requirement of structural reliability, and the CTE of a PCB (printed Circuit Board) and the CTE of the substrate are usually different, at this time, if a laser radar is in a high-temperature working environment and a low-temperature working environment, the PCB and the substrate are deformed differently, and the light emitting part arranged on the PCB and the collimating lens arranged on the substrate are relatively displaced, so that the laser emitted by the light emitting part is offset, the laser output by the collimating lens is offset, and finally, the laser output by the laser emission device cannot reach a target object, and detection cannot be completed.

Based on the above consideration, in order to reduce the degree of laser deflection output by the laser emitting device after deformation of materials with different CTE in the laser emitting device, so that the laser energy reaches the target object, the inventor of the application has proposed a laser emitting device through intensive research, and compared with a laser emitting device provided with only one collimating lens, the volume of the first lens can be effectively reduced by arranging the first lens for compressing the divergence angle of the laser and the second lens for expanding the laser, so that the first lens with smaller volume can be fixed with the PCB board through the fixing piece without affecting the structural reliability of the laser emitting device, thereby effectively reducing the relative displacement generated by the PCB board and the first lens, and reducing the degree of deflection of the laser output by the first lens, so that the laser energy output by the laser emitting device reaches the target object.

Further, in the laser emitting device provided by the embodiment of the application, the fixing piece is set to be the middle plate, the first vertical plate and the second vertical plate, one end of each vertical plate is connected with two ends of the middle plate respectively, and the first vertical plate and the second vertical plate are oppositely arranged. Through setting up two at least boards in medium plate, first riser and the second riser fixed setting on the PCB board, just also increase the area of contact of mounting and PCB board to make the mounting can fix on the PCB board steadily, and then when being fixed in the mounting with first lens, so that the mounting can be with first lens and PCB board stable fixed.

The dashed line in the drawings represents that the dashed portion of the component is obscured from view by other components at the current viewing angle, unless otherwise specified.

Fig. 1 shows a schematic structural diagram of a laser emitting device according to an embodiment of the present application. As shown in fig. 1, the laser emitting apparatus includes a PCB board 110, a substrate 120, a light emitting part 130, a fixing member 140, a first lens 150, and a second lens 160. The substrate 120 is disposed on one side of the PCB 110, and the light emitting portion 130 is disposed on the other side of the PCB 110 opposite to the substrate 120, where the substrate 120 may be a rack (i.e. a housing) of the laser radar; the light emitting part 130 is disposed on the PCB 110 and is configured to emit laser to a target area; the fixing piece 140 is disposed on the PCB board, and is used for fixing the first lens 150 and the PCB board 110, and the first lens 150 is used for receiving the laser emitted by the light emitting portion 130 and compressing the divergence angle of the received laser; the second lens 160 is disposed on the substrate 120, and is configured to receive the laser beam that is output by the first lens 150 and compressed at a divergence angle, and expand the received laser beam, so that the laser beam output by the second lens meets an application requirement.

The fixing piece comprises a middle plate, a first vertical plate and a second vertical plate, wherein the first vertical plate and the second vertical plate are respectively connected with two ends of the middle plate and are oppositely arranged, the first vertical plate, the second vertical plate and the middle plate form a U-shaped fixing portion, and at least one opening of the U-shaped fixing portion is arranged along the transmission direction of laser so as to allow the laser to pass through. For convenience of illustration, only the installation position of the fixing member 140 is shown in fig. 1, and the specific structure of the fixing member 140 will be illustrated in detail in the subsequent drawings.

It should be noted that, in some embodiments, the substrate 120 and the light emitting portion 130 may also be disposed on the same side of the PCB 110. The specific materials, shapes, sizes, etc. of the PCB 110, the substrate 120, the light emitting portion 130, the fixing member 140, the first lens 150, and the second lens 160 are not limited herein, as long as the above-mentioned installation requirements can be satisfied.

In this embodiment, by designing the laser emission device to include the first lens 150 for compressing the divergence angle of the laser and the second lens 160 for expanding the laser beam, the volume of the first lens 150 is reduced, and then the first lens 150 and the PCB board 110 are fixed by the fixing member 140 without affecting the structural reliability of the laser emission device, so that when the laser emission device is in a high-temperature or low-temperature working environment, the relative displacement between the light outlet 130 and the first lens 150, which are also disposed on the PCB board, can be avoided or reduced, so as to reduce the degree of laser offset output by the first lens 150, and enable the laser output by the laser emission device to accurately reach the target.

Further, in this embodiment of the present application, since the fixing element 140 includes a middle plate, a first vertical plate and a second vertical plate, one ends of the first vertical plate and the second vertical plate are respectively connected with the middle plate, and the first vertical plate and the second vertical plate are disposed opposite to each other, so that when the fixing element 140 is fixed on the PCB board 110, at least two plates of the middle plate, the first vertical plate and the second vertical plate are fixed on the PCB board 110, compared with a manner of fixing the first lens and the PCB board only through a single plate (i.e. a manner that one end of the single plate is fixed on the PCB board, and the other end extends towards the transmission direction of the laser until exceeding the outer edge of the PCB board, a manner of fixing the first lens on a portion of the single plate exceeding the outer edge of the PCB board) increases the contact area between the fixing element 140 and the PCB board 110, so that the fixing element 140 can be stably fixed on the PCB board 110, thereby the fixing element 140 can stably fix the first lens 150 and the PCB board 110.

In order to stably fix the PCB 110 and the first lens 150 by the fixing member 140, the embodiment of the present application provides a setting manner of the fixing member 140. Fig. 2 shows a schematic partial structure of the laser emitting device provided in the embodiment of the present application, and specifically shows a schematic structure of a PCB board, a light emitting portion, a fixing member, and a first lens in the laser emitting device provided in the embodiment of the present application, where, as shown in fig. 2, the fixing member includes a middle board 141, a first vertical board 142, and a second vertical board 143. Fig. 2 (a) shows a side view of the PCB board, the light emitting portion, the fixing member and the first lens provided in the embodiment of the present application, and fig. 2 (b) shows a top view of fig. 2 (a). Wherein, medium plate 141 sets up on PCB board 110, and be located the back of the light-emitting side of light-emitting part 130, the one end of first riser 142 is connected with the one end of medium plate 141, the one end of second riser 143 is connected with the other end of medium plate 141, and first riser 142 and second riser 143 set up relatively, the other end of first riser 142 and the other end of second riser 143 deviate from its link with medium plate 141 respectively towards the transmission direction extension of laser until surpassing the outer edge of PCB board 110, and this outer edge is located the light-emitting side of light-emitting part 130, the part that first riser 142 surpassed this outer edge forms first stiff end 1421, the part that second riser 143 surpassed this outer edge forms second stiff end 1431. The first lens 150 includes opposite first and second sides 151 and 152, and the first and second sides 151 and 152 are fixed to first and second fixed ends 1421 and 1431, respectively.

Preferably, the middle plate 141, the first standing plate 142, and the second standing plate 143 constitute a U-shaped fixing portion, and a U-shaped opening of the U-shaped fixing portion (i.e., an opening opposite to the middle plate 141) is arranged in a transmission direction of the laser light for the laser light to pass through.

If the volume of the PCB 110 is small, or the space on the back of the light emitting side of the light emitting portion 130 on the PCB 110 is limited, the middle board 141 cannot be placed on the PCB 110 on the back of the light emitting side of the light emitting portion 130, and fig. 2 (c) shows a side view of the PCB, the light emitting portion, the fixing member, and the first lens in the laser emitting apparatus according to other embodiments. As shown in fig. 2 (c), the middle plate 141 is installed in the vertical direction of the light emitting unit 130, for example, above the light emitting unit 130.

In this embodiment, through placing the middle plate 141 on the PCB 110 or erecting the middle plate on the vertical direction of the light emitting portion 130, and the first vertical plate 142 and the second vertical plate 143 are respectively connected with one end of the middle plate 141 and extend towards the laser transmission direction to form a fixed end for fixing the first lens 150, thereby increasing the contact area between the fixing member 140 and the PCB 110, so that the fixing member 140 can firmly fix the first lens 150 and the PCB 110, and since the first vertical plate 142 and the second vertical plate 143 are oppositely arranged, the first lens 150 and the PCB 110 are further stably fixed, so that when the laser emitting device is in a high-temperature and low-temperature working environment, the relative offset degree of the light emitting portion 130 and the first lens 150, which is also set on the PCB 110, can be effectively reduced, that is, the offset degree of the laser output by the first lens 150, that is, the offset degree of the laser output by the laser emitting device.

Further, by fixing the first and second sides 151 and 152 of the first lens 150 to the first and second risers 142 and 143, respectively, since the first and second sides 151 and 152 are opposite, after fixing the first lens 150 to the fixture 140, the first and second risers 142 and 143 can apply two opposite pressures to the first lens 150, thereby increasing structural stability, which allows the first lens 150 to be stably fixed to the fixture 140. Further, by fixing the first side surface 151 and the second side surface 152 of the first lens 150 to the first standing plate 142 and the second standing plate 143, respectively, the distance between the first lens 150 and the PCB 110 in the vertical direction can be adjusted according to the size of the light emitting unit 130, so that the first lens 150 can effectively receive the laser light output from the light emitting unit 130.

If the volume of the light-emitting portion 130 is smaller, the back surface of the light-emitting side of the light-emitting portion 130 is close to the edge of the PCB board 110, and the middle board 141 cannot be disposed on the back surface of the light-emitting side of the light-emitting portion 130, so that the fixing member 140 can stably fix the first lens 150 on the PCB board 110. Fig. 3 shows a schematic partial structure of a laser emitting device provided in an embodiment of the present application, and specifically shows a schematic structure of a PCB board, a light emitting portion, a fixing member, and a first lens in the laser emitting device provided in the embodiment of the present application. As shown in fig. 3, the fixing member 140 includes a middle plate 141, a first standing plate 142, and a second standing plate 143. Fig. 3 (a) shows a side view of the PCB board, the light emitting portion, the fixing member and the first lens provided in the embodiment of the present application, and fig. 3 (b) shows a top view of fig. 3 (a). The fixing member 140 is covered on the PCB 110, and a space is provided between the middle plate 141 and the light emitting portion 130 in the vertical direction. Specifically, the middle plate 141 may be located above the light emitting portion 130, one end of the first vertical plate 142 is connected with one end of the middle plate 141, one end of the second vertical plate 143 is connected with the other end of the middle plate 141, the first vertical plate 142 and the second vertical plate 143 are oppositely disposed, the first vertical plate 142 and the second vertical plate 143 extend towards the transmission direction of the laser until the outer edge of the PCB 110 is exceeded, the outer edge is located at the light emitting side of the light emitting portion 130, a portion of the first vertical plate 142 exceeding the outer edge forms a third fixed end, and a portion of the second vertical plate 143 exceeding the outer edge forms a fourth fixed end. The first lens 150 includes opposite first and second sides 151 and 152, and the first and second sides 151 and 152 are fixed to the third and fourth fixed ends, respectively.

The middle plate 141, the first vertical plate 142 and the second vertical plate 143 constitute a U-shaped fixing portion, and openings on both sides of the U-shaped fixing portion (i.e., two opposite openings surrounded by the middle plate 141 and the first and second vertical plates 142 and 143) are arranged along a transmission direction of laser light for passing through.

In this embodiment, the fixing piece 140 is arranged to cover the PCB board 110, so that one end of the first vertical plate 142 and one end of the second vertical plate 143 in the fixing piece 140 are respectively fixed on the PCB board 110, thereby increasing the contact area between the fixing piece 140 and the PCB board 110, so that the first lens 150 can be stably fixed on the first vertical plate 142 and the second vertical plate 143, that is, the fixing piece 140 stably fixes the PCB board 110 and the first lens 150, and reducing the offset degree of the laser output by the laser emitting device.

If the volume of the PCB 110 is smaller, in order to enable the fixing member 140 to stably fix the PCB 110 and the first lens 150, another setting manner of the fixing member 140 is provided in the embodiment of the present application. Fig. 4 shows a schematic partial structure of a laser emitting device according to an embodiment of the present application. Fig. 4 (a) shows a schematic structural diagram of the PCB 110, and as shown in fig. 4 (a), the outer edge of the PCB 110 is provided with a notch 111, and the outer edge is located on the light emitting side of the light emitting portion 130. In the embodiment of the present application, the fixing member 140 includes a middle plate 141, a first vertical plate 142, and a second vertical plate 143. Fig. 4 (b) shows a side view of the PCB board, the light emitting portion, the fixing member and the first lens provided in the embodiment of the present application, and fig. 4 (c) shows a top view of fig. 4 (b). As shown in fig. 4 (b) and (c), the notch 111 formed at the outer edge of the PCB 110 includes three sides, wherein the first vertical plate 142 and the second vertical plate 143 are respectively fixed on two opposite sides of the notch 111, the middle plate 141 is disposed in the vertical direction of the light emitting portion 130, and does not block the transmission of the laser, and one end of the first vertical plate 142 and one end of the second vertical plate 143 are respectively connected with two ends of the middle plate 141 in a one-to-one correspondence manner. For example, a middle plate 141 is provided below the light emitting unit 130, and one end of the middle plate 141 is connected to one end of the first vertical plate 142 and the other end is connected to one end of the second vertical plate 143. The first lens 150 includes opposite first and second side surfaces 151 and 152, and the first and second side surfaces 151 and 152 are fixed to the first and second risers 142 and 143, respectively, so that the first lens 150 is fixed in the fixture 140.

The middle plate 141, the first vertical plate 142 and the second vertical plate 143 constitute a U-shaped fixing portion, and openings on both sides of the U-shaped fixing portion (i.e., two opposite openings surrounded by the middle plate 141 and the first and second vertical plates 142 and 143) are arranged along a transmission direction of laser light for passing through.

In some embodiments, at least part of the first lens 150 is fixed in the notch 111 formed in the PCB 110, so as to improve structural stability.

In some embodiments, if two opposite side surfaces of the first lens 150 cannot be fixed to the first standing plate 142 and the second standing plate 143, the end surface of the first lens 150 may be fixed to the middle plate 141. Preferably, opposite sides of the first lens 150 are fixed to the first and second vertical plates 142 and 143, and end surfaces of the first lens 150 are fixed to the middle plate 141, increasing a fixing area of the first lens 150 and the fixing member 140 so that the fixing member 140 can firmly fix the PCB 110 and the first lens 150.

In this embodiment of the present application, the notch 111 is formed at the edge of the PCB 110, and the first vertical plate 142 and the second vertical plate 143 are disposed on opposite sides of the notch 111, so that the contact area between the fixing member 140 and the PCB 110 is increased, and then the PCB 110 and the first lens 150 are fixed by the fixing member 140, so that the relative offset degree of the light emitting portion 130 and the first lens 150, which are also disposed on the PCB 110, can be reduced, and the laser offset degree of the output of the laser emitting device is also reduced.

In order to improve stability of the fixing member 140, so that the PCB 110 and the first lens 150 can be stably fixed by the fixing member 140, another arrangement mode of the fixing member 140 is provided in the embodiment of the present application, wherein the hanging lugs are added on the basis of the embodiment provided in fig. 4. Fig. 5 shows a schematic partial structure of a laser emitting device provided in an embodiment of the present application, specifically, fig. 5 (a) shows a side view of a PCB board, a light emitting portion, a fixing member and a first lens in the laser emitting device provided in an embodiment of the present application, and fig. 5 (b) shows a top view of fig. 5 (a). As shown in fig. 5 (a) and (b), the fixing member 140 further includes a first hanging tab 144 and a second hanging tab 145, one end of the first hanging tab 144 is connected with one end of the first vertical plate 142, and the other end is erected on the PCB 110; one end of the second hanging tab 145 is connected with one end of the second vertical plate 143, and the other end is erected on the PCB 110.

Preferably, the first hanging tab 144 and the second hanging tab 145 are erected on the same side of the PCB 110 and the side of the PCB where the light emitting portion 130 is located, so as to further improve the stability of the fixing member 140.

In this embodiment, through increasing first hangers 144 and second hangers 145 to set up first hangers 144 and second hangers 145 on PCB board 110, increase the area of contact of mounting 140 and PCB board 110, thereby further improve the stability of mounting 140, just so that mounting 140 can fix PCB board 110 and first lens 150 more stably.

If the volume of the light emitting portion 130 is large, after the fixing member 140 is covered on the PCB 110, if the distance between the first vertical plate 142 and the second vertical plate 143 in the horizontal direction is greater than the distance between the first side surface 151 and the second side surface 152 of the first lens 150, that is, the first side surface 151 and the second side surface 152 of the first lens 150 cannot be fixed to the first vertical plate 142 and the second vertical plate 143, respectively, in order to fix the PCB 110 and the first lens 150 through the fixing member 140, another setting mode of the fixing member 140 is provided in this embodiment. Fig. 6 shows a schematic partial structure of a laser emitting device provided in an embodiment of the present application, and specifically shows a schematic structure of a PCB board, a light emitting portion, a fixing member, and a first lens in the laser emitting device provided in an embodiment of the present application, and as shown in fig. 6, the fixing member 140 includes a middle plate 141, a first vertical plate 142, and a second vertical plate 143. Fig. 6 (a) shows a side view of the PCB board, the light emitting portion, the fixing member and the first lens provided in the embodiment of the present application, and fig. 6 (b) shows a top view of fig. 6 (a). As shown in fig. 6 (a) and (b), the fixing member 140 is disposed to cover the PCB 110, and has a space between the middle plate 141 and the light emitting portion 130 in the vertical direction. Specifically, the middle plate 141 may be located above the light emitting portion 130, and the middle plate 141 extends toward the transmission direction of the laser until the middle plate extends beyond the outer edge of the PCB board 110, and the outer edge is located at the light emitting side of the light emitting portion 130, a portion of the middle plate 141 beyond the outer edge forms a fifth fixed end, an end surface of the first lens 150 is fixed to the fifth fixed end, one end of the first vertical plate 142 is connected with one end of the middle plate 141, one end of the second vertical plate 143 is connected with the other end of the middle plate 141, the first vertical plate 142 and the second vertical plate 143 are oppositely disposed, and the other end of the first vertical plate 142 and the other end of the second vertical plate 143 are fixed to the PCB board 110.

The middle plate 141, the first vertical plate 142 and the second vertical plate 143 constitute a U-shaped fixing portion, and openings on both sides of the U-shaped fixing portion (i.e., two opposite openings surrounded by the middle plate 141 and the first and second vertical plates 142 and 143) are arranged along a transmission direction of laser light for passing through.

In this embodiment, the fixing piece 140 is arranged to cover the PCB 110, so that one end of the first vertical plate 142 and one end of the second vertical plate 143 in the fixing piece 140 are respectively fixed on the PCB 110, thereby increasing the contact area between the fixing piece 140 and the PCB 110, so that the first lens 150 can be stably fixed on the middle plate 141, that is, the fixing piece 140 stably fixes the PCB 110 and the first lens 150, and reducing the offset degree of the laser output by the laser emitting device.

Further, by fixing the end surface of the first lens 150 on the middle plate 141, since there is only one contact surface with the fixing member 140, when the laser emitting device is in a high and low temperature working environment, if the fixing member 140 is deformed, the first lens 150 will not be seriously affected, i.e. the first lens 150 will not be severely deformed.

In some embodiments, to further improve the stability of the laser emitting device, the opposite first and second sides 151 and 152 of the first lens 150 are fixed to the first and second vertical plates 142 and 143, respectively, and the end surface of the first lens 150 is fixed to the middle plate 141, and by fixing three surfaces of the first lens 150 in the fixing member 140, the fixing area of the first lens 150 and the fixing member 140 is increased, so that the fixing member 140 can firmly fix the PCB 110 and the first lens 150.

It should be noted that in any of the embodiments provided in fig. 1 to fig. 6, preferably, the center of the light emitting portion 130 is aligned with the principal point of the first lens 150, and the distance between the light emitting surface of the first lens 150 and the center of the light emitting portion 130 is 1 to 1.5 times the focal length of the first lens 150, so that the first lens 150 can better receive the laser light emitted by the light emitting portion 130. Further, it is preferable that the fixing member 140 is a one-piece member, that is, the middle plate 141, the first standing plate 142, and the second standing plate 143 are one-piece members. Preferably, the CTE of the PCB board 110, the fixing member 140 and the first lens 150 are the same, or the CTE of the fixing member 140 is between the CTE of the first lens 150 and the CTE of the PCB board 110, for example, the material of the fixing member 140 may be kovar, carbon steel, 4J50, 4J42, etc. The first lens 150 may be a cylinder, a sphere, an aspherical mirror, a glass rod, or the like. The first lens 150 may be fixed to the fixing member 140 by means of adhesive or welding. The fixing member 140 may be fixed to the PCB 110 by means of adhesive, welding, screwing or clamping.

It should be noted that, in the embodiments provided in fig. 1 to 3, at least one plate of the fixing member 140 is disposed to extend toward the transmission direction of the laser light until the outer edge of the PCB board 110 is exceeded, so that the first lens 150 is fixed at the portion of the fixing member 140 beyond the outer edge of the PCB board 110, and the fixing manner is to consider that the height of the first lens 150 in the vertical direction is adapted to the height of the light emitting portion 130, so that the first lens 150 can effectively receive the laser light output by the light emitting portion 130.

The embodiment of the application also provides a laser radar, which comprises any one of the laser transmitting devices provided by the embodiment, and further comprises a laser receiving device. The laser transmitting device is used for transmitting laser to the target area, and the laser receiving device is used for receiving reflected laser from the target area. Fig. 7 shows a schematic structural diagram of a lidar according to an embodiment of the present application. As shown in fig. 7, the laser radar 200 includes a laser emitting device 201 and a laser receiving device 202, wherein the laser emitting device 201 can emit laser light to a target area, and the laser receiving device 202 can receive reflected laser light from the target area, so that the laser radar 200 can perform effective detection on a detection area.

As described above, if the fixing member of the optical element in the laser emitting device of the laser radar is deformed, the laser emitted by the laser emitting device is deflected and cannot reach the target area, so that the detection cannot be completed. In this embodiment of the present application, by using the laser emission device provided in the foregoing embodiment, the degree of offset of the laser emitted by the laser emission device may be reduced, so that the laser radar may complete effective detection.

Claims (10)

1. A laser emitting apparatus, comprising:

a PCB board;

a substrate;

the light emitting part is arranged on the PCB and used for emitting laser to a target area;

the fixing piece is arranged on the PCB and comprises a middle plate, and a first vertical plate and a second vertical plate which are respectively connected with two ends of the middle plate and are oppositely arranged;

the first lens is fixed with at least one plate among the middle plate, the first vertical plate and the second vertical plate, and is used for receiving the laser emitted by the light emitting part and compressing the divergence angle of the received laser;

the second lens is arranged on the substrate and is used for receiving the laser after the divergence angle of the laser is compressed and the received laser is expanded.

2. The laser light emitting device according to claim 1, wherein at least part or all of at least one of the middle plate, the first vertical plate and the second vertical plate exceeds an outer edge of the PCB, the first lens is fixed to a portion of the fixing member exceeding the outer edge, wherein the outer edge is an outer edge of an area on the PCB where the light emitting portion is provided, and the outer edge is located on a light emitting side of the light emitting portion.

3. The laser light emitting device of claim 1 or 2, wherein the first lens comprises a first side and a second side, wherein the first side and the second side are fixed with the first riser and the second riser, respectively.

4. The laser light emitting device according to claim 3, wherein the middle plate is provided on a back surface of a light outgoing side of the light outgoing section or is erected in a vertical direction of the light outgoing section, and the first and second standing plates are provided on both sides of the light outgoing section;

the first vertical plate and the second vertical plate respectively deviate from one end of the middle plate and extend towards the transmission direction of the laser until exceeding the outer edge of the PCB, the first vertical plate and the second vertical plate respectively exceed the outer edge to form a first fixed end and a second fixed end, the first side face and the second side face are respectively fixed on the first fixed end and the second fixed end, wherein the outer edge is the outer edge of the area of the light-emitting part arranged on the PCB, and the outer edge is positioned on the light-emitting side of the light-emitting part.

5. The laser emitting apparatus according to claim 3, wherein the fixing member is covered on the PCB board, and a space is provided between the middle board and the light emitting portion in a vertical direction;

the first vertical plate and the second vertical plate extend towards the transmission direction of the laser until the first vertical plate and the second vertical plate extend beyond the outer edge of the PCB, and a third fixed end and a fourth fixed end are respectively formed at the parts of the first vertical plate and the second vertical plate beyond the outer edge, wherein the outer edge is the outer edge of the area on the PCB where the light-emitting part is arranged, and the outer edge is positioned at the light-emitting side of the light-emitting part;

the first side surface and the second side surface are respectively fixed to the third fixed end and the fourth fixed end.

6. The laser transmitter of claim 3, wherein the outer edge of the PCB is provided with a notch facing the transmission direction of the laser, and the first vertical plate and the second vertical plate are respectively fixed to two opposite sides of the notch, wherein the first side surface and the second side surface are respectively fixed to the first vertical plate and the second vertical plate.

7. The laser transmitter of claim 6, wherein the ends of the first and second vertical plates extend in a horizontal plane toward the outside of the notch to form first and second hangers, respectively, and the first and second hangers are respectively mounted on the PCB.

8. The laser emitting device of claim 1 or 2, wherein the first lens comprises an end face, wherein the end face is fixed with the middle plate.

9. The laser emitting device according to claim 8, wherein the fixing member is covered on the PCB board, and a space is provided between the middle board and the light emitting portion in a vertical direction;

the middle plate extends towards the transmission direction of the laser until the middle plate exceeds the outer edge of the PCB, a fifth fixed end is formed at the part of the middle plate exceeding the outer edge, and the end face is fixed at the fifth fixed end, wherein the outer edge is the outer edge of the area of the light emitting part arranged on the PCB, and the outer edge is positioned at the light emitting side of the light emitting part.

10. A lidar, the lidar comprising:

the laser emitting apparatus according to any one of claims 1 to 9, for emitting laser light to a target area; and

and a laser light receiving device for receiving the reflected laser light from the target area.