Composite laser radar rotating mirror for improving light spots

Abstract

The utility model relates to the technical field of laser radar rotating mirrors, in particular to a composite laser radar rotating mirror capable of improving light spots, which comprises a base used for fixing a composite plane mirror, the composite plane mirror is fixed on the base, and the composite plane mirror comprises an AL layer, a CA layer and a polycarbonate layer. The CA layer is arranged between the AL layer and the polycarbonate layer, and an NC layer is arranged on the surface, away from the CA layer, of the polycarbonate layer. According to the utility model, the composite plane mirror and the base are bonded to form a composite laser radar rotating mirror structure, and the base is injection-molded independently, so that the diversity of the base of the laser radar rotating mirror can be ensured, the planeness of an optical surface is not influenced, and the light degree of the whole structure and the flexibility of the laser radar rotating mirror can be ensured at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of lidar rotating mirrors, and particularly relates to a composite lidar rotating mirror for improving the light spot. Background Technique

[0002] The new technologies of lidar are widely used in fields such as aircraft, driverless cars, commercial service robots, security, and industrial automation. The working principle of lidar is to emit a detection signal (laser beam) to the target, and then compare the received signal (target echo) reflected from the target with the emitted signal. After appropriate processing, relevant information about the target can be obtained. As the core component of the laser scanning system, the surface profile accuracy of the single-sided or multi-sided rotating mirror directly affects the light spot focusing effect of the product.

[0003] The conventional lidar rotating mirror is of an integral structure and is formed by plastic molding. Problems such as flash and burrs will occur in the product, affecting the optical performance of the optical surface. Content of the Utility Model

[0004] The purpose of the utility model is to provide a composite lidar rotating mirror for improving the light spot.

[0005] The utility model provides the following technical solutions:

[0006] The utility model provides a composite lidar rotating mirror for improving the light spot, which includes a base for fixing the composite plane mirror. The composite plane mirror is fixed on the base. The composite plane mirror includes an AL layer, a CA layer, and a polycarbonate layer. The CA layer is arranged between the AL layer and the polycarbonate layer. An NC layer is arranged on the surface of the polycarbonate layer away from the CA layer, and the NC layer is attached to the upper surface of the base.

[0007] Further, the lower part of the base is a circular code disk, and an inclined support seat is arranged on the circular code disk. The composite plane mirror is fixed on the inclined support seat.

[0008] Further, two positioning columns for restricting the position of the composite plane mirror are arranged on the joint surface between the inclined support seat and the composite plane mirror, and the two positioning columns are located on the left and right sides of the inclined support seat.

[0009] Further, a horizontal glue application groove is formed in the middle of the inclined support seat, and two vertical glue application grooves are also formed on the inclined support seat. The two vertical glue application grooves are respectively distributed on both sides of the horizontal glue application groove.

[0010] Further, positioning holes that coincide with the positioning columns are formed on the composite plane mirror.

[0011] Further, the inclined support base includes a connecting portion fixed on the circular code disk, a support column is arranged on the connecting portion, a support plate is arranged on the support column, the support plate has an inclination angle with the connecting portion, and the lower end of the support plate extends to the upper surface of the circular code disk. A support frame is fixed under the support plate.

[0012] One through hole is formed on each of the upper and lower sides of the composite plane mirror.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows: The present utility model uses a composite plane mirror and a base to be bonded together to form a structure of a composite laser radar rotating mirror. The base is injection-molded separately, which can not only ensure the diversity of the base of the laser radar rotating mirror, but also does not affect the flatness of the optical surface. At the same time, it can ensure the lightness of the overall structure and the flexibility of the laser radar rotating mirror. At the same time, by using a composite plane mirror, the test performance is improved, and the hardness meets HB, preventing scratching and improving the yield rate of the appearance. Description of the Drawings

[0014] Figure 1 It is a schematic diagram of the overall structure of the present utility model.

[0015] Figure 2 It is an exploded structure schematic diagram of the present utility model.

[0016] Figure 3 It is a schematic diagram of the film layer combination of the composite plane mirror.

[0017] Figure 4 It is a schematic diagram of the bonding surface where the composite plane mirror is bonded to the base.

[0018] Figure 5 It is a bottom view schematic diagram of the base.

[0019] In the figure, 1 - base; 2 - composite plane mirror; 3 - AL layer; 4 - CA layer; 5 - polycarbonate layer; 6 - NC layer; 7 - circular code disk; 8 - inclined support base; 81 - connecting portion; 82 - support column; 83 - support plate; a - inclination angle; 84 - support frame; 9 - positioning column; 10 - horizontal glue application groove; 11 - vertical glue application groove; 12 - positioning hole; 13 - through hole. Detailed Embodiments

[0020] The present utility model will be further described below with reference to the drawings.

[0021] Refer to Figure 1 、 Figure 3 and Figure 4, in an embodiment of the present utility model, a compound rotating mirror for improving light spots includes a base 1 for fixing a compound plane mirror. A compound plane mirror 2 is fixed on the base 1. The compound plane mirror 2 includes an AL layer 3 (aluminum metal layer), a CA layer 4 (hardening liquid layer), and a polycarbonate layer 5. The CA layer 4 (machining layer) is disposed between the AL layer 3 and the polycarbonate layer 5. An NC layer 6 is provided on the surface of the polycarbonate layer 5 away from the CA layer 4, and the NC layer 6 is attached to the upper surface of the base 1. The base 1 and the compound plane mirror 2 are adhesively bonded with AB glue to form a compound rotating mirror. The base 1 is injection-molded separately, which can not only ensure the diversity and complexity of the base, but also not affect the flatness of the optical surface, surface roughness and other indicators, meet the imaging effect, improve the test performance of reliability, and at the same time ensure the optimal lightness of the overall structure, ensuring the flexibility of the rotating mirror rotation system.

[0022] Refer to Figure 3 and Figure 4 , in the above embodiment, the AL layer 3 is an optical surface; the NC layer 6 is fixed on the base 1.

[0023] Refer to Figure 2 , in an embodiment of the present utility model, the lower part of the base 1 is a circular code disk 7, and an inclined support seat 8 is provided on the circular code disk 7. The compound plane mirror 2 is fixed on the inclined support seat 8.

[0024] Please continue to refer to Figure 2 , in the above embodiment, two positioning posts 9 for restricting the position of the compound plane mirror 2 are provided on the joint surface of the inclined support seat 8 and the compound plane mirror 2. The two positioning posts 9 are located on the left and right sides of the inclined support seat 8; the compound plane mirror 2 is positioned.

[0025] Continue to refer to Figure 2 , in the above embodiment, the two positioning posts 9 are symmetrically arranged.

[0026] Please continue to refer to Figure 2 , in an embodiment of the present utility model, a horizontal glue application groove 10 is provided in the middle of the inclined support seat 8, and two vertical glue application grooves 11 are also provided on the inclined support seat 8. The two vertical glue application grooves 11 are respectively distributed on both sides of the horizontal glue application groove 10; ensuring that the compound plane mirror 2 can be firmly bonded to the base 1.

[0027] Refer to Figure 4 , in an embodiment of the present utility model, a positioning hole 12 matching the positioning post 9 is provided on the compound plane mirror 2; to better position the compound plane mirror 2 on the base 1. At the same time, the cooperation between the positioning hole 12 and the positioning post 9 is symmetrically arranged on both sides, enabling the compound plane mirror 2 to be better installed on the base 1.

[0028] Refer to Figure 1 ,Figure 2 and Figure 4 In an embodiment of the present utility model, the inclined support base 8 includes a connecting portion 81 fixed on the circular code disk 7. A support column 82 is provided on the connecting portion 81, and a support plate 83 is provided on the support column 82. The support plate 83 has an inclination angle a with the connecting portion 81, and the lower end of the support plate 83 extends to the upper surface of the circular code disk 7. A support frame 84 is fixed under the support plate 83.

[0029] Refer to Figure 1 and Figure 2 , in the above embodiment, the support plate 83 can overlap with the composite plane mirror 2; to better fix the composite plane mirror 2.

[0030] Refer to Figure 2 , in an embodiment of the present utility model, through holes are respectively formed in the upper and lower sides of the composite plane mirror and the base; for installing light guide tubes.

[0031] Inject glue into the horizontal dispensing groove 10 and the vertical dispensing groove 11, and fit the positioning holes 12 on the NC layer of the composite plane mirror with the positioning posts 9 on the base to complete the fitting and fixing of the composite plane mirror 2 and the base 1.

[0032] The embodiments of the present utility model are given for the purposes of illustration and description. Although the embodiments of the present utility model have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present utility model. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present utility model.

Claims

1. A composite laser radar rotating mirror with improved light spot, characterized in that: The invention comprises a base for fixing a composite plane mirror, the composite plane mirror is fixed on the base, the composite plane mirror comprises an AL layer, a CA layer and a polycarbonate layer, the CA layer is arranged between the AL layer and the polycarbonate layer, an NC layer is arranged on the surface of the polycarbonate layer away from the CA layer, and the NC layer is bonded to the upper surface of the base.

2. The composite laser radar rotating mirror with improved light spot according to claim 1, characterized in that: The lower part of the base is a circular code disk, an inclined support seat is arranged on the circular code disk, and the composite plane mirror is fixed on the inclined support seat.

3. The composite laser radar rotating mirror with improved light spot according to claim 2, characterized in that: Two positioning posts for limiting the position of the compound plane mirror are arranged on the fitting surface of the tilting support seat and the compound plane mirror, and the two positioning posts are located at the left and right sides of the tilting support seat.

4. The composite laser radar rotating mirror with improved light spot according to claim 2, characterized in that: A horizontal glue dispensing groove is provided in the middle of the inclined support seat, and two vertical glue dispensing grooves are also provided on the inclined support seat, and the two vertical glue dispensing grooves are respectively distributed on both sides of the horizontal glue dispensing groove.

5. The composite laser radar rotating mirror with improved light spot according to claim 3, characterized in that: The composite plane mirror is provided with a positioning hole which matches the positioning column.

6. The composite laser radar rotating mirror with improved light spot according to claim 2, characterized in that: The inclined support seat includes a connecting portion fixed on the circular code disc, a supporting column is arranged on the connecting portion, a supporting plate is arranged on the supporting column, the supporting plate and the connecting portion have an inclination angle, and the lower end of the supporting plate extends to the upper surface of the circular code disc, and a supporting frame is fixed under the supporting plate.

7. The composite laser radar rotating mirror with improved light spot according to claim 1, characterized in that: A through hole is respectively provided on the upper and lower sides of the composite plane mirror.

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