CN216595588U

CN216595588U - Laser radar multi-surface rotating prism

Info

Publication number: CN216595588U
Application number: CN202123233236.4U
Authority: CN
Inventors: 赵帅; 路丽睿; 李宇峰; 关功昊
Original assignee: Tudaton Intelligent Technology Shanghai Co ltd
Current assignee: Tudaton Intelligent Technology Shanghai Co ltd
Priority date: 2021-12-21
Filing date: 2021-12-21
Publication date: 2022-05-24
Anticipated expiration: 2031-12-21

Abstract

The invention discloses a laser radar multi-surface rotating prism which comprises an inner core, wherein the outer surface of the inner core is connected with a cladding, the cladding is a polygonal prism which is rotationally symmetrical along the central axis of the inner core, and the outer surface of the cladding is plated with an optical film. The device has that inner core structure alternative is high, and inner core material alternative is wide, and cladding material alternative is strong, and available high accuracy mould direct forming moreover, production efficiency is high, and is with low costs, and optics face quality is controlled easily, is fit for the effect of volume production.

Description

Laser radar multi-surface rotating prism

Technical Field

The invention relates to the field of vehicle-mounted laser radars, in particular to a laser radar multi-surface rotating prism.

Background

At present, a rotary prism of a vehicle-mounted laser radar is generally processed by single materials such as plastic, metal and glass, and because the surface shape and the thermal deformation of the plastic material during rotation are difficult to control, the metal and glass schemes have a serious cost problem.

A laser radar apparatus of publication No. CN201820249024.4 has the following problems:

because the rotating prism is usually assembled with a motor, the problems of uneven product thickness, shrinkage of plastic materials and the like which occur when the thicknesses are uneven can be avoided in the structural design; this can result in the reflective surface failing to meet the optical reflective surface requirements.

Because the requirements of the optical reflecting surface of the rotating prism and the angle between the optical reflecting surfaces are high, and simultaneously, the plasticity of the glass material is not strong enough, the cost is high when the optical surface of the reflecting mirror is processed by using metal materials and glass materials, and the mass production is not high.

Disclosure of Invention

The invention aims to solve the defects in the prior art and provides a laser radar multi-surface rotating prism.

In order to achieve the purpose, the invention adopts the following technical scheme: a laser radar multi-face rotating prism comprises an inner core;

the outer surface of the inner core is connected with a cladding, and the cladding is a polygonal prism which is rotationally symmetrical along the central axis of the inner core;

the outer surface of the cladding is plated with an optical film.

As a further description of the above technical solution: the inner core is made of metal, plastic, ceramic or glass.

As a further description of the above technical solution: the material of the cladding is optical plastic.

As a further description of the above technical solution: the normal surface of the changeable prism outside the cladding layer and the central axis of the inner core are provided with a certain angle.

As a further description of the above technical solution: the thickness of the cladding is provided with a plurality of groups.

As a further description of the above technical solution: the cladding is wrapped around the exterior of the inner core.

As a further description of the above technical solution: the inner core and the cladding are integrally formed in an injection molding mode.

As a further description of the above technical solution: the inner core and the cladding are two groups of independent structures.

As a further description of the above technical solution: the inner structure of the inner core is provided with a plurality of types.

As a further description of the above technical solution: the normal surface of each group of prisms outside the single cladding layer and the central axis of the inner core are provided with a plurality of groups of angles.

The invention has the following beneficial effects:

1. the inner core and the cladding can be made of different materials or the same material respectively, the structure of the inner core and the thickness of the cladding can be designed and manufactured according to different requirements, the material of the inner core can be metal, plastic, ceramic or glass, so that the inner core has strong machinability and good adaptability, and can be assembled by matching with various other components, the material of the cladding is optical plastic, the stability is good, the precision of optical surfaces is high, the processing is simple, the cost is low, the mass production performance is high, the material and the thickness of the cladding can be selected according to different requirements, the surface shape of the cladding has good stable optical performance, the function of the rotating prism can be realized, and the surface shape of the rotating prism cannot be changed or deformed by heating when the rotating prism rotates.

Drawings

FIG. 1 is a schematic diagram illustrating the integration of an inner core and a cladding of a lidar multi-facet rotating prism according to the present invention;

FIG. 2 is a schematic diagram of a certain included angle between an inner core and a cladding of a laser radar multi-facet rotating prism according to the present invention;

fig. 3 is a schematic diagram of a laser radar multi-facet rotating prism according to the present invention, in which an inner core and a cladding are separately designed.

Illustration of the drawings:

1. an inner core; 2. a cladding layer; 3. an optical film.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and furthermore, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1-3, one embodiment of the present invention is provided: a laser radar multi-surface rotating prism comprises an inner core 1;

the outer surface of the inner core 1 is connected with a cladding 2, and the cladding 2 is a polygonal prism which is rotationally symmetrical along the central axis of the inner core 1;

the outer surface of the cladding 2 is plated with an optical film 3.

The inner core 1 and the cladding 2 can be made of different materials or the same material, the structure of the inner core 1 and the thickness of the cladding 2 can be designed and manufactured according to different requirements, the inner core 1 can be made of metal, plastic, ceramic or glass, the inner core 1 is high in machinability and good in adaptability and can be assembled by matching with various other components, the cladding 2 is made of optical plastic, the stability is good, the precision between optical surfaces is high, the processing is simple and low in cost, the mass production performance is high, meanwhile, the material and the thickness of the cladding 2 can be selected according to different requirements, the surface type stability and the optical performance of the cladding 2 are good, the function of a rotating prism can be achieved, and the surface type of the rotating prism cannot be changed or deformed by heating when the rotating prism rotates.

Further, the material of the inner core 1 is metal, plastic, ceramic or glass.

Furthermore, the cladding layer 2 is made of optical plastic, which is relatively stable and does not have the problems of surface shape change and thermal deformation.

Further, the normal plane of the changeable prism outside the cladding 2 and the central axis of the inner core 1 are provided with certain angles, and different angles can be set as required, so that the changeable prism is suitable for different environments and different functions.

Furthermore, the thickness of the cladding 2 is provided with a plurality of groups, and different thicknesses can be adopted according to specific requirements.

Further, the cladding 2 is wrapped outside the inner core 1, and the cladding 2 can be selected to completely wrap or incompletely wrap the inner core 1 according to actual needs.

Further, the inner core 1 and the cladding 2 are integrally formed by injection molding.

Further, the inner core 1 and the cladding 2 are of two independent structures.

According to the scheme, the two groups of the integrated structures or the two groups of the independent structures can be assembled and fixed together as required.

Further, the inner structure of the inner core 1 is provided with a plurality of types, and can be designed according to the assembly condition with other components.

Further, the normal surface of each group of prisms outside the single cladding 2 is provided with a plurality of groups of angles with the central axis of the inner core 1.

The working principle is as follows: the device is when using, inner core 1 and cladding 2 can adopt different materials or the same material to make respectively, the structure of inner core 1 and the thickness of cladding 2 can be designed and manufactured according to the requirement of difference simultaneously, the material of inner core 1 can select metal, plastics, pottery or glass, make inner core 1 machinability strong, the suitability is good, can cooperate multiple other part to realize the assembly, and the material of cladding 2 is optical plastics, stability is good, optical surface interplanar precision is high, processing is simple and with lower costs, thereby it is high to make volume productibility, can select the material and the thickness of cladding 2 according to different requirements simultaneously, can make cladding 2 face type stable optical property good, can realize the function of rotating prism, can not make rotating prism face type change or thermal deformation when rotatory.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims

1. A laser radar multi-face rotating prism is characterized in that: comprises an inner core (1);

the outer surface of the inner core (1) is connected with a cladding (2), and the cladding (2) is a polygonal prism which is rotationally symmetrical along the central axis of the inner core (1);

the outer surface of the cladding (2) is plated with an optical film (3).

2. The lidar multifaceted rotating prism of claim 1, wherein: the inner core (1) is made of metal, plastic, ceramic or glass.

3. The lidar multifaceted rotating prism of claim 1, wherein: the material of the cladding (2) is optical plastic.

4. The lidar multifaceted rotating prism of claim 1, wherein: the normal plane of the changeable prism outside the cladding (2) and the central axis of the inner core (1) are provided with a certain angle.

5. The lidar multifaceted rotating prism of claim 1, wherein: the thickness of the cladding (2) is provided with a plurality of groups.

6. The lidar multifaceted rotating prism of claim 1, wherein: the cladding (2) is wrapped outside the inner core (1).

7. The lidar multifaceted rotating prism of claim 1, wherein: the inner core (1) and the cladding (2) are integrally formed in an injection molding mode.

8. The lidar multifaceted rotating prism of claim 1, wherein: the inner core (1) and the cladding (2) are of two groups of independent structures.

9. The lidar multifaceted rotating prism of claim 1, wherein: the inner structure of the inner core (1) is provided with a plurality of types.

10. The lidar multifaceted rotating prism of claim 1, wherein: the normal surface of each group of prisms outside the single cladding (2) and the central axis of the inner core (1) are provided with a plurality of groups of angles.