CN217787382U - Detection optical system - Google Patents

Abstract

The utility model relates to an optical system field specifically discloses a detection optical system, and wherein, the transmission subassembly sends first light beam and second light beam, makes first light beam and second light beam incident to the mirror that shakes respectively, makes first light beam by the mirror reflection to first reflecting element that shakes, makes the second light beam by the mirror reflection to second reflecting element that shakes. The first reflecting element comprises at least two first reflecting surfaces, the light reflected by each first reflecting surface has different field angles, the second reflecting element comprises at least one second reflecting surface, and the field angle of the light reflected by the second reflecting surface is between the field angles of the light reflected by two adjacent first reflecting surfaces, so that the field angle formed by the combination of the field angle of the light reflected by each first reflecting surface and the field angle of the light reflected by the second reflecting surface is larger than the field angle of the light reflected by the galvanometer. The receiving assembly receives light returned by the outside after the detection optical system emits light to the outside, and the scanning field angle is expanded by the first reflecting element and the second reflecting element.

Description

Detection optical system

Technical Field

The utility model relates to an optical system field especially relates to a detection optics system.

Background

Micro-Electro-Mechanical System (MEMS) is applied to the laser radar, and the scanning of a target area can be rapidly realized. However, in the prior art, the scanning field of view of the galvanometer is limited, so that large-field-angle scanning cannot be realized, and the application requirements of some scenes cannot be met.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a detection optical system has increased scanning field angle.

In order to achieve the above purpose, the utility model provides a following technical scheme:

a detection optical system comprises an emitting assembly, a vibrating mirror, a first reflecting element, a second reflecting element and a receiving assembly, wherein the receiving assembly is used for receiving light returned from the outside after the light is emitted to the outside by the detection optical system;

the transmitting assembly is used for emitting a first light beam and a second light beam, enabling the first light beam and the second light beam to be incident to the vibrating mirror respectively, enabling the first light beam to be incident to the first reflecting element after being reflected by the vibrating mirror, and enabling the second light beam to be incident to the second reflecting element after being reflected by the vibrating mirror;

the first reflecting element comprises at least two first reflecting surfaces, the first reflecting surfaces are used for reflecting light, the light reflected by each first reflecting surface has different field angles, the second reflecting element comprises at least one second reflecting surface, the second reflecting surface is used for reflecting light, and the field angle of the light reflected by the second reflecting surface is positioned between the field angles of the light reflected by the adjacent two first reflecting surfaces, so that the field angle formed by combining the field angles of the light reflected by the first reflecting surfaces and the field angle of the light reflected by the second reflecting surface is larger than the field angle of the light reflected by the galvanometer.

Preferably, the light reflected by each first reflecting surface has a different angle of view in the first axial direction, and the angle of view in the first axial direction of the light reflected by each second reflecting surface is between the angles of view in the first axial direction of the light reflected by two adjacent first reflecting surfaces, so that the angle of view in the first axial direction of the light reflected by each first reflecting surface, which is a combination of the angle of view in the first axial direction of the light reflected by each first reflecting surface and the angle of view in the first axial direction of the light reflected by each second reflecting surface, is greater than the angle of view in the first axial direction of the light reflected by the galvanometer.

Preferably, the first axial direction is a horizontal direction corresponding to horizontal vibration of the galvanometer or a vertical direction corresponding to vertical vibration of the galvanometer.

Preferably, the first reflecting element includes the first reflecting surface located at the middle, the first reflecting surface located at the left side, and the first reflecting surface located at the right side, and the second reflecting element includes the second reflecting surface located at the left side and the second reflecting surface located at the right side;

the field angle of the light emitted by the second reflecting surface positioned on the left side is between the field angle of the light reflected by the first reflecting surface positioned in the middle and the field angle of the light reflected by the first reflecting surface positioned on the left side;

the angle of view of the light emitted by the second reflecting surface on the right side is between the angle of view of the light reflected by the first reflecting surface in the middle and the angle of view of the light reflected by the first reflecting surface on the right side.

Preferably, the normal direction of the first reflecting surface on the left side is biased to the left side, and the normal direction of the first reflecting surface on the right side is biased to the right side.

Preferably, the normal direction of the second reflecting surface on the left side is biased to the left side, and the normal direction of the second reflecting surface on the right side is biased to the right side.

Preferably, the field angle of the detection optical system = (mechanical half angle of the galvanometer + rotation angle of the outermost first reflecting surface of the first reflecting element around the axis) × 4.

Preferably, the first reflecting element is a prism comprising at least two surfaces, the surfaces of the prism forming the first reflecting surface, or the second reflecting element is a prism comprising at least one surface, the surfaces of the prism forming the second reflecting surface.

Preferably, the optical detection device comprises at least two receiving modules, and the receiving modules are used for receiving light which is emitted to the outside by the optical detection system and then returns from the outside in different directions.

Preferably, the optical fiber connector further comprises a first light splitting element and a second light splitting element, and the receiving assembly comprises a first receiving assembly and a second receiving assembly;

the first light beam emitted by the emitting component passes through the first light splitting element and then enters the vibrating mirror, the light returned from the outside enters the first light splitting element after being reflected by the first reflecting element and the vibrating mirror in sequence, and the first light splitting element is used for separating the returned light from the first light beam emitted by the emitting component and enabling the returned light to enter the first receiving component;

the second light beam emitted by the emitting component passes through the second light splitting element and then enters the vibrating mirror, the light returning from the outside is reflected by the second reflecting element and the vibrating mirror in sequence and then enters the second light splitting element, and the second light splitting element is used for separating the returning light from the second light beam emitted by the emitting component and enabling the returning light to enter the second receiving component.

According to the above technical scheme, the utility model provides a detection optical system, wherein, the emission subassembly is used for sending first light beam and second light beam, makes first light beam and second light beam incident to the mirror that shakes respectively, makes first light beam incident to first reflecting element after the mirror reflection that shakes, makes the second light beam incident to second reflecting element after the mirror reflection that shakes. The first reflecting element comprises at least two first reflecting surfaces, the first reflecting surfaces are used for reflecting light, the light reflected by each first reflecting surface has different field angles, the second reflecting element comprises at least one second reflecting surface, the second reflecting surface is used for reflecting light, the field angle of the light reflected by the second reflecting surface is between the field angles of the light reflected by two adjacent first reflecting surfaces, and the field angle formed by combining the field angle of the light reflected by each first reflecting surface and the field angle of the light reflected by the second reflecting surface is larger than the field angle of the light reflected by the galvanometer. The receiving assembly is used for receiving light returned by the outside after the detection optical system emits light to the outside. The utility model discloses a detection optical system passes through the mirror swing that shakes, can realize emitting the light to the target area to scan the detection to the target area, wherein utilize first reflection element and second reflection element to make the angle of vision of detection optical system emission light be greater than the angle of vision of the mirror that shakes itself, thereby expanded the scanning angle of vision.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic diagram of a detection optical system according to an embodiment of the present invention;

FIG. 2 is a schematic view of the detection optics shown in FIG. 1;

fig. 3 is a schematic diagram of a first reflective element according to an embodiment of the present invention;

fig. 4 is a schematic diagram of a second reflective element according to an embodiment of the present invention;

fig. 5 is a schematic diagram of a detection optical system according to another embodiment of the present invention;

fig. 6-1 is a schematic diagram of a light splitting element according to an embodiment of the present invention;

FIG. 6-2 is a light path diagram of the spectroscopic element shown in FIG. 6-1;

fig. 7-1 is a schematic view of a light splitting element according to another embodiment of the present invention;

FIG. 7-2 is a light path diagram of the spectroscopic element shown in FIG. 7-1;

fig. 8 is a schematic diagram of a detection optical system according to another embodiment of the present invention;

fig. 9 is a schematic view of the angle of view of the detection optical system shown in fig. 8.

Reference numerals in the drawings of the specification include:

a galvanometer-100, a first reflecting element-101, a second reflecting element-102, a first emitting component-103, a second emitting component-104, a first reflecting surface-106 positioned on the left side, a first reflecting surface-107 positioned in the middle, a first reflecting surface-108 positioned on the right side, a second reflecting surface-109 positioned on the left side, a second reflecting surface-110 positioned on the right side, and a receiving component-111;

the viewing angle-201 of the light reflected by the first reflecting surface and the viewing angle-202 of the light reflected by the second reflecting surface;

a first light splitting element-112, a second light splitting element-113, a first receiving component-114, a second receiving component-115, and a target-116;

a first high-reflection film-601, a light through hole-611 and a delustering processing area-621;

a first antireflection film-602, a second high reflection film-612 and a second antireflection film-622.

Detailed Description

In order to make the technical solutions in the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.

The embodiment provides a detection optical system, which comprises an emitting assembly, a galvanometer, a first reflecting element, a second reflecting element and a receiving assembly, wherein the receiving assembly is used for receiving light returned from the outside after the detection optical system emits the light to the outside;

the transmitting assembly is used for transmitting a first light beam and a second light beam, enabling the first light beam and the second light beam to be incident to the galvanometer respectively, enabling the first light beam to be incident to the first reflecting element after being reflected by the galvanometer, and enabling the second light beam to be incident to the second reflecting element after being reflected by the galvanometer;

the first reflecting element comprises at least two first reflecting surfaces, the first reflecting surfaces are used for reflecting light, the light reflected by each first reflecting surface has different field angles, the second reflecting element comprises at least one second reflecting surface, the second reflecting surface is used for reflecting light, the field angle of the light reflected by the second reflecting surface is positioned between the field angles of the light reflected by the two adjacent first reflecting surfaces, and the field angle formed by the combination of the field angle of the light reflected by each first reflecting surface and the field angle of the light reflected by the second reflecting surface is larger than the field angle of the light reflected by the galvanometer.

The light beam enters the vibrating mirror, and the emergent direction of the light beam reflected by the vibrating mirror is changed through the swinging of the vibrating mirror, so that the detection optical system can emit light to a target area and can scan and detect the target area.

The first light beam emitted by the emission component is incident to the vibrating mirror, the vibrating mirror reflects the first light beam to the first reflection element, and then the first light beam is reflected by the first reflection element and emitted. The angles of view at which the light beams are reflected by the respective first reflecting surfaces of the first reflecting elements are different.

The second light beam emitted by the emission component is incident to the vibrating mirror, the vibrating mirror reflects the second light beam to the second reflection element, and then the second light beam is reflected by the second reflection element and emitted. The angle of view of the light beam reflected by the second reflecting surface of the second reflecting element is between the angles of view of the light beams reflected by two adjacent first reflecting surfaces of the first reflecting element, so that the angle of view of the light beams reflected by each first reflecting surface and the angle of view of the light beams reflected by the second reflecting surface after combination is larger than the angle of view of the light beams reflected by the galvanometer.

The detection optical system of the embodiment can realize emission of light to a target area through swinging of the galvanometer so as to scan and detect the target area, wherein the first reflecting element and the second reflecting element are utilized to enable the angle of view of the light emitted by the detection optical system to be larger than the angle of view of the galvanometer, so that the scanning angle of view is expanded.

Optionally, the light reflected by each first reflecting surface has a different angle of view in the first axial direction, and the angle of view in the first axial direction of the light reflected by the second reflecting surface is between the angles of view in the first axial direction of the light reflected by two adjacent first reflecting surfaces, so that the angle of view in the first axial direction after the angle of view in the first axial direction of the light reflected by each first reflecting surface is combined with the angle of view in the first axial direction of the light reflected by the second reflecting surface is greater than the angle of view in the first axial direction of the light reflected by the galvanometer. If the galvanometer is swung, the detection optical system emits light to scan along the first axial direction, and the detection optical system of the embodiment utilizes the first reflecting element and the second reflecting element, so that the field angle of the light emitted by the detection optical system in the first axial direction is larger than the field angle of the galvanometer itself in the first axial direction, the scanning field angle of the detection optical system in the first axial direction is expanded, and the field angle of the light scanning along the first axial direction is increased.

Alternatively, the first axis may be a horizontal direction corresponding to horizontal vibration of the galvanometer, and the detection optical system expands a field angle of light emitted by the detection optical system to scan in the horizontal direction by using the first reflecting element and the second reflecting element. Alternatively, the first axial direction may be a vertical direction corresponding to vertical vibration of the galvanometer, so that a field angle at which the detection optical system scans in the vertical direction can be expanded.

By setting the angle of the first reflecting surface of the first reflecting element, the angle of field of light reflected by the first reflecting surface is controlled. In this embodiment, the number of the first reflecting surfaces included in the first reflecting element and the angles of the first reflecting surfaces are not limited, and in practical applications, the number of the first reflecting surfaces included in the first reflecting element and the angles of the respective first reflecting surfaces are set in accordance with the requirement for the expansion of the angle of view of the detection optical system.

The angle of the second reflecting surface of the second reflecting element is set to control the angle of the field of view of the light reflected by the second reflecting surface. In this embodiment, the number of the second reflecting surfaces included in the second reflecting element and the angle of the second reflecting surface are not limited, and in practical application, the number of the second reflecting surfaces and the angle of the second reflecting surfaces are determined according to the requirement for expanding the angle of view of the detection optical system and the combination of the angle of view of the detection optical system

The viewing angle of light reflected by each first reflecting surface of the first reflecting element is set according to the number of the second reflecting surfaces included in the second reflecting element and the angle of each second reflecting surface.

As an alternative embodiment, the first reflecting element includes the first reflecting surface at the middle, the first reflecting surface at the left side, and the first reflecting surface at the right side, and the second reflecting element includes the second reflecting surface at the left side and the second reflecting surface at the right side; the field angle of the light emitted by the second reflecting surface positioned on the left side is between the field angle of the light reflected by the first reflecting surface positioned in the middle and the field angle of the light reflected by the first reflecting surface positioned on the left side; the angle of view of the light emitted by the second reflecting surface on the right side is between the angle of view of the light reflected by the first reflecting surface in the middle and the angle of view of the light reflected by the first reflecting surface on the right side.

For example, referring to fig. 1, fig. 1 is a schematic diagram of a detection optical system according to an embodiment, and as shown in the figure, the detection optical system includes a first emitting assembly 103, a second emitting assembly 104, a galvanometer 100, a first reflecting element 101, a second reflecting element 102, and a receiving assembly. As shown, the first emitting assembly 103 emits a first light beam, and the first light beam is incident on the galvanometer 100, and the first light beam is reflected by the galvanometer 100 to the first reflecting element 101. The first reflecting element 101 includes a first reflecting surface 107 located in the middle, a first reflecting surface 106 located on the left side, and a first reflecting surface 108 located on the right side, and the first light beam reflected by the galvanometer 100 is sequentially incident on each first reflecting surface during the oscillation of the galvanometer 100. The second emitting component 104 emits a second light beam, which is incident on the galvanometer 100, and the second light beam is reflected by the galvanometer 100 to the second reflecting element 102. The second reflecting element 102 includes a second reflecting surface 109 on the left side and a second reflecting surface 110 on the right side, and the second light beam reflected by the galvanometer 100 is sequentially incident on each of the second reflecting surfaces during the oscillation of the galvanometer 100. The light beam emitted from the first reflecting element 101 or the second reflecting element 102 is emitted toward the target 116.

Referring to fig. 2, fig. 2 is a schematic view illustrating a field angle of the detection optical system shown in fig. 1, and the detection optical system shown in fig. 1 utilizes a first reflective element 101 and a second reflective element 102 to achieve an expanded field angle in a horizontal direction. As shown in fig. 2, the field angle 202 of the light reflected by the second reflecting surface of the second reflecting element 102 is filled between the field angles 201 of the light reflected by two adjacent first reflecting surfaces of the first reflecting element 101, and the field angle 201 of the light reflected by each first reflecting surface of the first reflecting element 101 and the field angle 202 of the light reflected by each second reflecting surface of the second reflecting element 102 form a complete field of view of the detection optical system in combination.

Alternatively, the normal direction of the first reflective surface 106 on the left side may be biased to the left side, and the normal direction of the first reflective surface 108 on the right side may be biased to the right side. Referring to fig. 3, fig. 3 is a schematic diagram of a first reflective element according to an exemplary embodiment, as shown in the figure, a first reflective surface 107 located in the middle of the first reflective element 101 is connected to a first reflective surface 106 located on the left side, the first reflective surface 107 located in the middle is connected to a first reflective surface 108 located on the right side, a normal direction of the first reflective surface 106 located on the left side is biased to the left side, and a normal direction of the first reflective surface 108 located on the right side is biased to the right side.

Optionally, the normal direction of the second reflecting surface 109 on the left side is biased to the left side, and the normal direction of the second reflecting surface 110 on the right side is biased to the right side, so that the angle of view of the light reflected by the second reflecting surface 109 on the left side is on the left side, and can be between the angle of view of the light reflected by the first reflecting surface in the middle and the angle of view of the light reflected by the first reflecting surface on the left side; and the angle of view of the light reflected by the second reflecting surface 110 positioned on the right side is positioned on the right side, and can be positioned between the angle of view of the light reflected by the first reflecting surface positioned in the middle and the angle of view of the light reflected by the first reflecting surface positioned on the right side. Referring to fig. 4, fig. 4 is a schematic diagram of a second reflective element according to an embodiment, as shown in the figure, a second reflective surface 109 on the left side and a second reflective surface 110 on the right side of the second reflective element 102 are connected, a normal direction of the second reflective surface 109 on the left side is biased to the left side, and a normal direction of the second reflective surface 110 on the right side is biased to the right side.

Then, the field angle of the detection optical system = (mechanical half angle of the galvanometer + rotation angle of the outermost first reflective surface of the first reflective element around the axis) × 4. In the detection optical system shown in fig. 1, when the galvanometer 100 oscillates horizontally, that is, swings around the vertical axis Y, and the first reflecting surfaces on both sides of the first reflecting element 101 are symmetrical, the extended field angle = (galvanometer horizontal axis mechanical half angle + rotation angle θ of the first reflecting element on the uppermost reflecting surface around the vertical axis) × 4. Referring to fig. 3, the outermost reflective surface of the first reflective element 101 is the first reflective surface 106 located on the left side or the first reflective surface 108 located on the right side, and the rotation angle of the outermost reflective surface of the first reflective element 101 around the vertical axis is θ.

In this embodiment, the structure of the transmitting assembly is not limited. Optionally, the emission assembly may include a light source and a collimation assembly for collimating light emitted from the light source. In this embodiment, the optical structure of the collimating assembly is not limited, for example, the collimating assembly may employ a collimating optical lens. Alternatively, the light source may employ a laser.

In this embodiment, the structure of the receiving assembly is not limited, and light returned from the outside can be received. Alternatively, the receiving assembly may include a converging assembly for converging the received light to the photodetector and the photodetector. The optical structure of the converging component is not limited in this embodiment, and for example, the converging component may employ a focusing optical lens.

In this embodiment, the number of the receiving modules is not limited, and in practical applications, the number of the receiving modules is set according to the angle of view of the detection optical system and the angle of view of a single receiving module, so that it is required to ensure that the detection optical system emits light to the outside and then the light returning from the outside in different directions can be received. Preferably, the detection optical system may include at least two receiving elements, and light returning from different directions of the outside after being emitted to the outside by the detection optical system is received by each receiving element. For example, the detection optical system shown in fig. 1 includes three receiving assemblies 111, which ensure that the detection optical system emits light to the outside and then the light returning from the outside in different directions can be received.

For the detection optics shown in fig. 1, the emitting assembly and the receiving assembly are not coaxial, but in other embodiments the emitting assembly and the receiving assembly may also be of coaxial design. As an alternative embodiment, the detection optical system may further include a first beam splitting element and a second beam splitting element, and the receiving assembly includes a first receiving assembly and a second receiving assembly; the first light beam emitted by the emitting component passes through the first light splitting element and then enters the vibrating mirror, the light returned from the outside enters the first light splitting element after being reflected by the first reflecting element and the vibrating mirror in sequence, and the first light splitting element is used for separating the returned light from the first light beam emitted by the emitting component and enabling the returned light to enter the first receiving component; the second light beam emitted by the emitting component passes through the second light splitting element and then enters the vibrating mirror, the light returning from the outside is reflected by the second reflecting element and the vibrating mirror in sequence and then enters the second light splitting element, and the second light splitting element is used for separating the returning light from the second light beam emitted by the emitting component and enabling the returning light to enter the second receiving component. The transmitting assembly and the receiving assembly are coaxially designed, so that the system structure is compact, and the volume of the detection optical system is reduced.

Referring to fig. 5, fig. 5 is a schematic diagram of a detection optical system according to yet another embodiment, and as shown in the figure, the detection optical system includes a first emitting assembly 103, a second emitting assembly 104, a galvanometer 100, a first reflecting element 101, a second reflecting element 102, a first beam splitting element 112, a second beam splitting element 113, a first receiving assembly 114, and a second receiving assembly 115. The first light beam emitted by the first emitting assembly 103 transmits through the first light splitting element 112 and then enters the galvanometer 100, and the light returning from the outside is reflected by the first reflecting element 101 and the galvanometer 100 in sequence, enters the first light splitting element 112, and is reflected by the first light splitting element 112 to the first receiving assembly 114. The second light beam emitted by the second emitting component 104 transmits through the second light splitting element 113 and then enters the galvanometer 100, and the light returning from the outside is reflected by the second reflecting element 102 and the galvanometer 100 in sequence, enters the second light splitting element 113, and is reflected by the second light splitting element 113 to the second receiving component 115.

Alternatively, the first light splitting element or the second light splitting element may be a detection optical system such as that shown in fig. 5, which transmits the light beam emitted from the emission assembly and reflects the return light to separate the return light from the light beam emitted from the emission assembly. Referring to fig. 6-1 and 6-2, fig. 6-1 is a schematic diagram of a light splitting element according to an embodiment, and fig. 6-2 is a light path diagram of the light splitting element shown in fig. 6-1, as shown in the diagram, the light splitting element is provided with a light through hole 611, an antireflection film may be provided in the light through hole 611, a first high-reflection film 601 is provided on a surface of the light splitting element facing the return light side except for the light through hole 611, and a surface of the light splitting element facing away from the return light side except for the light through hole 611 is an extinction processing region 621.

Alternatively, the first light splitting element or the second light splitting element may reflect the light beam emitted by the emitting assembly and transmit the return light, so as to separate the return light from the light beam emitted by the emitting assembly. Referring to fig. 7-1 and 7-2, fig. 7-1 is a schematic diagram of a light splitting element according to still another embodiment, and fig. 7-2 is a light path diagram of the light splitting element shown in fig. 7-1, where as shown, a second high reflection film 612 is disposed in a middle region of the light splitting element, and a first antireflection film 602 and a second antireflection film 622 are disposed on two side surfaces of the light splitting element except for the middle region.

Referring to fig. 8, fig. 8 is a schematic diagram of a detection optical system according to another embodiment, as shown in the figure, a first light beam is emitted from a first emission assembly 103 and enters a galvanometer 100, and the first light beam is reflected by the galvanometer 100 to a first reflection element 101. The first reflecting element 101 is vertically disposed, and the first light beams reflected by the galvanometer 100 are sequentially incident on the respective first reflecting surfaces during the oscillating of the galvanometer 100 around the horizontal axis. The second emitting component 104 emits a second light beam, which is incident on the galvanometer 100, and the second light beam is reflected by the galvanometer 100 to the second reflecting element 102. The second reflecting element 102 is vertically disposed, and the second light beam reflected by the galvanometer 100 is sequentially incident to each of the second reflecting surfaces during the oscillating of the galvanometer 100 around the horizontal axis.

The detection optical system shown in fig. 8 realizes expansion of the angle of field in the vertical direction by the first reflecting element 101 and the second reflecting element 102. Referring to fig. 9, fig. 9 is a schematic view illustrating an angle of view of the detecting optical system shown in fig. 8, as shown in fig. 9, an angle of view 202 of light reflected by the second reflecting surface of the second reflecting element 102 is filled between angles of view 201 of light reflected by two adjacent first reflecting surfaces of the first reflecting element 101, and the angle of view 201 of light reflected by each first reflecting surface of the first reflecting element 101 and the angle of view 202 of light reflected by each second reflecting surface of the second reflecting element 102 form a complete field of view of the detecting optical system in combination.

As an alternative embodiment, the first reflecting element may include the first reflecting surface on the left side and the first reflecting surface on the right side, and the angle of view of light emitted by the second reflecting surface is between the angle of view of light reflected by the first reflecting surface on the left side and the angle of view of light reflected by the first reflecting surface on the right side. The field angle of light reflected by each first reflecting surface of the first reflecting element and the field angle of light reflected by the second reflecting surface of the second reflecting element are combined to form a complete field of view of the detection optical system, and the scanning field angle of the detection optical system can also be expanded. Optionally, a normal direction of the first reflection surface of the first reflection element located on the left side is deviated to the left side, and a normal direction of the first reflection surface located on the right side is deviated to the right side, so that a field angle of light reflected by the first reflection surface of the first reflection element located on the left side is located on the left side, a field angle of light reflected by the first reflection surface of the first reflection element located on the right side is located on the right side, and a field angle of light reflected by the second reflection surface is located in the middle, and the three combine to form a complete field of view of the detection optical system.

Alternatively, the first reflective element may be a prism comprising at least two surfaces, the surfaces of the prism forming said first reflective surface. Alternatively, the second reflective element is a prism comprising at least one surface, the surface of the prism forming the second reflective surface. The reflecting surface may be formed by plating a reflecting film on the surface of the prism.

The detection optical system of the present embodiment can be applied to a laser radar.

The above provides a detailed description of the detection optical system provided by the present invention. The principles and embodiments of the present invention have been explained herein using specific examples, and the above description of the embodiments is only used to help understand the method and its core idea of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the scope of the appended claims.

Claims (10)

1. The detection optical system is characterized by comprising a transmitting assembly, a galvanometer, a first reflecting element, a second reflecting element and a receiving assembly, wherein the receiving assembly is used for receiving light returned from the outside after the light is emitted to the outside by the detection optical system;

the transmitting assembly is used for transmitting a first light beam and a second light beam, enabling the first light beam and the second light beam to be incident to the galvanometer respectively, enabling the first light beam to be incident to the first reflecting element after being reflected by the galvanometer, and enabling the second light beam to be incident to the second reflecting element after being reflected by the galvanometer;

the first reflecting element comprises at least two first reflecting surfaces, the first reflecting surfaces are used for reflecting light, the light reflected by each first reflecting surface has different field angles, the second reflecting element comprises at least one second reflecting surface, the second reflecting surface is used for reflecting light, the field angle of the light reflected by the second reflecting surface is positioned between the field angles of the light reflected by the two adjacent first reflecting surfaces, and the field angle formed by the combination of the field angle of the light reflected by each first reflecting surface and the field angle of the light reflected by the second reflecting surface is larger than the field angle of the light reflected by the galvanometer.

2. The detection optical system according to claim 1, wherein the angles of view of the light reflected by the respective first reflecting surfaces in the first axial direction are different, and the angle of view of the light reflected by the second reflecting surface in the first axial direction is between the angles of view of the light reflected by the adjacent two first reflecting surfaces in the first axial direction, so that the angle of view of the light reflected by the respective first reflecting surfaces in the first axial direction after the angles of view of the light reflected by the respective first reflecting surfaces in the first axial direction and the angle of view of the light reflected by the second reflecting surface in the first axial direction are combined is larger than the angle of view of the light reflected by the galvanometer in the first axial direction.

3. The detection optical system according to claim 2, wherein the first axial direction is a horizontal direction corresponding to horizontal vibration of the galvanometer or a vertical direction corresponding to vertical vibration of the galvanometer.

4. The detection optical system according to claim 1, wherein the first reflection element includes the first reflection surface on the middle, the first reflection surface on the left side, and the first reflection surface on the right side, and the second reflection element includes the second reflection surface on the left side and the second reflection surface on the right side;

the field angle of the light emitted by the second reflecting surface positioned on the left side is between the field angle of the light reflected by the first reflecting surface positioned in the middle and the field angle of the light reflected by the first reflecting surface positioned on the left side;

the angle of view of the light emitted by the second reflecting surface on the right side is between the angle of view of the light reflected by the first reflecting surface in the middle and the angle of view of the light reflected by the first reflecting surface on the right side.

5. The detection optical system according to claim 4, wherein the normal direction of the first reflection surface on the left side is biased to the left side, and the normal direction of the first reflection surface on the right side is biased to the right side.

6. The detection optical system according to claim 4, wherein the normal direction of the second reflection surface on the left side is biased to the left side, and the normal direction of the second reflection surface on the right side is biased to the right side.

7. The detection optical system according to claim 1, wherein a field angle of the detection optical system = (mechanical half angle of a galvanometer mirror + rotation angle around an axis of the first reflection surface on the outermost side of the first reflection element) × 4.

8. The detection optical system according to any one of claims 1 to 7, wherein the first reflecting element is a prism including at least two surfaces, a surface of which forms the first reflecting surface, or the second reflecting element is a prism including at least one surface, a surface of which forms the second reflecting surface.

9. The detection optical system according to any one of claims 1 to 7, comprising at least two of the receiving elements, wherein light returned from the outside in different directions after being emitted to the outside by the detection optical system is received by each of the receiving elements.

10. The detection optical system according to any one of claims 1 to 7, further comprising a first beam splitting element and a second beam splitting element, wherein the receiving assembly includes a first receiving assembly and a second receiving assembly;

the first light beam emitted by the emitting component passes through the first light splitting element and then enters the vibrating mirror, the light returned from the outside enters the first light splitting element after being reflected by the first reflecting element and the vibrating mirror in sequence, and the first light splitting element is used for separating the returned light from the first light beam emitted by the emitting component and enabling the returned light to enter the first receiving component;

the second light beam emitted by the emitting component passes through the second light splitting element and then enters the vibrating mirror, the light returning from the outside is reflected by the second reflecting element and the vibrating mirror in sequence and then enters the second light splitting element, and the second light splitting element is used for separating the returning light from the second light beam emitted by the emitting component and enabling the returning light to enter the second receiving component.

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