CN214375247U - Laser radar optical system and laser radar - Google Patents
Laser radar optical system and laser radar Download PDFInfo
- Publication number
- CN214375247U CN214375247U CN202120189633.7U CN202120189633U CN214375247U CN 214375247 U CN214375247 U CN 214375247U CN 202120189633 U CN202120189633 U CN 202120189633U CN 214375247 U CN214375247 U CN 214375247U
- Authority
- CN
- China
- Prior art keywords
- reflecting
- optical system
- emitting
- light
- indicating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The utility model provides a laser radar optical system and laser radar belongs to optics technical field, has improved radar received signal's SNR, and remote high accuracy measurement in the realization, when having solved the radar installation, the easy problem of introducing measuring error because of the position that can not install. The laser radar optical system includes a transmitting portion, a reflecting portion, a receiving portion, and an indicating portion. Emergent light of the emitting part is emitted to the reflecting part and then reflected to a measured object, the measured object diffusely reflects return light to the reflecting part and is reflected to the receiving part through the reflecting part, when the radar is installed, visible light is emitted to the reflecting part through the indicating part and then is reflected through the reflecting part, and the visible light emitted by the indicating part and the emergent light of the emitting part are on the same horizontal plane, so that the visible light emitted by the indicating part is used as indication of a working area of the emergent light of the emitting part.
Description
Technical Field
The utility model belongs to the technical field of the optical technology and specifically relates to a laser radar optical system and laser radar are related to.
Background
In the rapid development process of industrial automation, the photoelectric sensor plays an important role, and the laser radar is widely applied to the fields of measurement, protection and the like as a technical form of the photoelectric sensor.
The existing laser radar adopts near-infrared light sources, human eyes cannot see the light sources, and when the radar is installed, the problem of measurement error caused by the fact that the radar cannot be installed exists.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a laser radar optical system and laser radar to introduce measuring error's problem because of the position that can not install easily when alleviating the radar installation that exists among the prior art.
In a first aspect, the present invention provides a lidar optical system comprising a transmitting portion, a reflecting portion, a receiving portion, and an indicating portion;
emergent light of the emitting part is emitted to the reflecting part and then reflected to a measured object, and the measured object diffusely reflects the return light to the reflecting part and then reflects the return light to the receiving part through the reflecting part;
emergent light of the indicating part is emitted to the reflecting part and then is reflected by the reflecting part;
the emergent light of the indicating part and the emergent light of the emitting part are on the same horizontal plane, and the emergent light of the indicating part is visible light.
Furthermore, the indication part of the laser radar optical system is positioned at the side of the transmitting part.
Furthermore, the transmitting part and the receiving part of the laser radar optical system are positioned at the same side of the reflecting part, and an isolation structure is arranged between the transmitting part and the receiving part.
Furthermore, the isolation structure of the laser radar optical system comprises an isolation plate and a baffle plate, wherein the baffle plate is formed on one side of the isolation plate, and the baffle plate is perpendicular to the isolation plate.
Furthermore, the reflection part of the laser radar optical system comprises a scalene multi-surface reflector, a rotary driving piece and a rotating shaft;
the rotating shaft is arranged in the middle of the scalene multi-surface reflector, and the rotary driving piece is connected with the rotating shaft;
the optical axis of the transmitting part of the laser radar optical system is positioned on one side of the rotating shaft of the reflecting part, and the optical axis is perpendicular to the rotating shaft.
Furthermore, the laser radar optical system comprises an indication part and a reflection part, wherein the indication part comprises a red laser tube and a lens, and visible light emitted by the red laser tube is emitted to the reflection part through the lens and is reflected out.
Furthermore, the emitting part of the laser radar optical system comprises a near-infrared laser diode and an emitting lens, and emergent light emitted by the near-infrared laser diode is collimated by the emitting lens and then emitted to the reflecting part.
Furthermore, the receiving part of the laser radar optical system comprises an avalanche diode and a receiving lens, and the diffuse reflection return light is reflected to the receiving lens through the reflecting part and is converged to the avalanche diode through the receiving lens.
Furthermore, the emergent light emitted by the emitting part of the laser radar optical system is collimated by the emitting lens and then emitted to the reflecting part at a divergence angle of 0.1 degree.
In a second aspect, the present invention also provides a lidar comprising the lidar optical system described above.
The utility model provides a laser radar optical system, including launching part, reflection part, receiving part and instruction part, set up isolation structure between launching part and receiving part to extend to the reflection part, avoid the reverberation to return to the receiving part inside the radar, arouse received signal's shake, improve received signal's SNR, remote high accuracy measurement in the realization. The side edge of the emitting part is provided with the indicating part capable of emitting visible light, and the visible light emitted by the indicating part is used as the indication of the working area of the emitting part to emit light, so that the problem that measurement errors are easily introduced due to the fact that the radar cannot be installed when the radar is installed is solved.
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 embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are 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 sectional perspective view of the present invention provided in an embodiment of the present invention;
fig. 2 is a schematic position diagram of an isolation structure according to an embodiment of the present invention;
fig. 3 is a schematic view of an isolation structure provided in an embodiment of the present invention;
fig. 4 is a schematic diagram of positions of an optical axis of the emitting portion and a rotating shaft of the reflecting portion according to an embodiment of the present invention.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The terms "comprising" and "having," and any variations thereof, as referred to in the embodiments of the present invention, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements but may alternatively include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; 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 meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
When the laser radar is used for measurement, an invisible light source is emitted through the emitting part, the invisible light source is reflected to a measured object through the reflecting part, the measured object diffusely reflects back light to the reflecting part and is reflected to the receiving part through the reflecting part, and in the prior art, when the emitting part and the receiving part are positioned at the same side of the reflecting part, the relative position of an emitting optical axis and a reflecting rotating shaft is unreasonable, the scanning angle is small, and the receiving part easily receives stray light, so that the measurement data is jittered, and high-precision measurement cannot be realized; and when the worker installs the radar, the precise installation can not be realized, and the problem of measurement error caused by the fact that the radar cannot be installed is caused.
In order to solve the above problem, an embodiment of the present invention provides a laser radar optical system and a laser radar.
Referring to fig. 1, fig. 2, fig. 3 and fig. 4, a lidar optical system provided in this embodiment is shown, including a transmitting portion 1, a receiving portion 2, a reflecting portion 3 and an indicating portion 4.
Specifically, as shown in fig. 1, the outgoing light from the emitting portion 1 is emitted to the reflecting portion 3, and then reflected to the object to be measured, and the object to be measured diffusely reflects the outgoing light back to the reflecting portion 3, and is reflected to the receiving portion 2 through the reflecting portion. When the radar is installed, the indicating part 4 emits visible light to the reflecting part 3, the visible light is reflected by the reflecting part, and the emergent light of the indicating part 4 and the emergent light of the emitting part 1 are on the same horizontal plane, so that the visible light emitted by the indicating part is used as an indication of a working area of the emergent light of the emitting part, and the problem that measuring errors are easily introduced due to the fact that the radar cannot be installed during installation is solved.
The emitting part 1 comprises a near-infrared laser diode 5, a lens frame 6 and an emitting lens 8, the near-infrared laser diode 5 is arranged in the emitting lens 8, the emitting lens 8 is fixed through the lens frame 6, emergent light of the near-infrared laser diode is collimated through the emitting lens 8, then is emitted to the reflecting part 3 at an divergence angle of 0.1 degree, and then is emitted to a measured object. The slow axis of a laser diode is selected to calculate a light spot divergence angle, for example, Oselan SPL PL90-3, a light emitting surface is 200 x 10um, the divergence angle is calculated by 10um, the theoretical divergence angle theta of the light spot can be obtained by dividing the length by the focal length of an emitting lens, tan (theta/2) is L/2f, when the divergence angle is 0.1 degrees, the focal length f of the emitting lens is 5.73mm, and the space occupied by an emitting part is greatly shortened.
The receiving part 2 comprises an avalanche diode 9, a lens frame 6 and a receiving lens 10, the avalanche diode 9 is arranged in the receiving lens 10, the receiving lens is fixed through the lens frame 6, the detected object diffusely reflects the return light to the reflecting part 3, the return light is reflected to the receiving lens 10 through the reflecting part 3, and the return light is converged to the avalanche diode 9 through the receiving lens.
As shown in fig. 2, the emitting part 1 and the receiving part 2 are located at the same side of the reflecting part 3, and an isolation structure 12 is arranged between the emitting part and the receiving part to isolate the emergent light of the emitting part from the return light received by the receiving part, so as to avoid the emergent light of the emitting part from returning to the receiving part through a small amount of diffuse reflection on the surface of the reflecting part or the reflected light of other components, improve the signal-to-noise ratio of the received signal, and realize high-precision measurement.
As shown in fig. 3, the isolation structure 12 includes an isolation plate and two baffles, the baffles are formed on one side of the isolation plate, and the two baffles are parallel to each other and perpendicular to the isolation plate.
The reflection part 3 comprises an inequilateral multi-face reflector, a rotary driving part and a rotating shaft, the rotating shaft is arranged at the center of the inequilateral multi-face reflector, the rotary driving part is connected with the rotating shaft, the rotating shaft is driven to rotate through the rotary driving part, 360-degree internal period circulation of the inequilateral multi-face reflector is achieved, measurement is conducted for multiple times in one period (one circle of rotation of the reflection part), the number of test points is increased, and measurement accuracy is improved.
The indicating part 4 comprises a red laser tube 11 and a lens 7, as shown in fig. 1, the indicating part 4 is positioned on the side edge of the emitting part 1, the red laser tube 11 emits visible light after being collimated by the lens 7, the visible light is reflected by the reflecting part 3 and is positioned on the same horizontal plane with the emergent light of the invisible near-infrared laser diode 5, and the emergent light is used as a scanning plane for indicating invisible near-infrared laser scanning formation during installation, so that the installation and measurement accuracy is greatly improved.
As shown in fig. 4, the emitting portion 1, the receiving portion 2 and the reflecting portion 3 are reasonably arranged, so that the optical axis of the emitting portion is located on one side of the rotating shaft of the reflecting portion, when the projection length of the reflecting surface is equal to the maximum dimension of the outer diameter of the emitting portion, the emitting optical axis is arranged on the central line of the side projection, namely, when the reflecting portion rotates to the angle of the reflecting portion drawn by the dotted line shown in fig. 4, the position of the reflecting portion is the maximum light-emitting angle, when the reflecting portion rotates to the angle of the reflecting portion drawn by the solid line shown in fig. 4, the light boundaries of the emitting portion and the receiving portion are not shielded, and the position of the reflecting portion is the minimum light-emitting angle, so that the scanning angle is increased.
The embodiment of the utility model provides a still provide a laser radar, the laser radar optical system who provides with above-mentioned embodiment has the same technical characteristic, so also can solve the same technical problem, reach the same technological effect.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus once an item is defined in one figure, it need not be further defined and explained in subsequent figures, and moreover, the terms "first", "second", "third", etc. are used merely to distinguish one description from another and are not to be construed as indicating or implying relative importance.
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the technical solution of the present invention, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: those skilled in the art can still modify or easily conceive of changes in the technical solutions described in the foregoing embodiments or make equivalent substitutions for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit of the embodiments of the present invention, and are intended to be included within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A lidar optical system comprising a transmitting portion, a reflecting portion, a receiving portion, and an indicating portion;
emergent light of the emitting part is emitted to the reflecting part and then reflected to a measured object, and the measured object diffusely reflects the return light to the reflecting part and then reflects the return light to the receiving part through the reflecting part;
emergent light of the indicating part is emitted to the reflecting part and then is reflected by the reflecting part;
the emergent light of the indicating part and the emergent light of the emitting part are on the same horizontal plane, and the emergent light of the indicating part is visible light.
2. The lidar optical system of claim 1, wherein the indicating portion is located to a side of the transmitting portion.
3. The lidar optical system of claim 1, wherein the transmitting portion and the receiving portion are located on the same side of the reflecting portion, and an isolation structure is provided between the transmitting portion and the receiving portion.
4. The lidar optical system of claim 3, wherein the isolation structure comprises an isolation plate and a baffle plate, the baffle plate being formed on one side of the isolation plate and perpendicular to the isolation plate.
5. The lidar optical system of claim 1, wherein the reflective portion comprises a scalene multifaceted reflector, a rotary drive, and a shaft;
the pivot set up in the center of inequilateral polygon reflector, rotary driving spare with the pivot is connected, and the optical axis of launching part is located one side of reflection part pivot, and the optical axis perpendicular to the pivot.
6. The lidar optical system of claim 1, wherein the indicating portion comprises a red laser tube and a lens, and visible light emitted from the red laser tube is emitted through the lens to the reflecting portion and reflected.
7. The lidar optical system according to claim 1, wherein the emitting portion includes a near-infrared laser diode and an emitting lens, and wherein an outgoing light from the near-infrared laser diode is collimated by the emitting lens and then emitted to the reflecting portion.
8. The lidar optical system of claim 1, wherein the receiving portion comprises an avalanche diode and a receiving lens, and wherein the diffusely reflected return light is reflected by the reflecting portion to the receiving lens and is converged by the receiving lens to the avalanche diode.
9. The lidar optical system according to claim 1, wherein the exit light from the emitting portion is collimated by the emitting lens and then exits to the reflecting portion at a divergence angle of 0.1 °.
10. Lidar characterized in that it comprises a lidar optical system according to any of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120189633.7U CN214375247U (en) | 2021-01-22 | 2021-01-22 | Laser radar optical system and laser radar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120189633.7U CN214375247U (en) | 2021-01-22 | 2021-01-22 | Laser radar optical system and laser radar |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214375247U true CN214375247U (en) | 2021-10-08 |
Family
ID=77958628
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120189633.7U Active CN214375247U (en) | 2021-01-22 | 2021-01-22 | Laser radar optical system and laser radar |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214375247U (en) |
-
2021
- 2021-01-22 CN CN202120189633.7U patent/CN214375247U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108445467A (en) | A kind of scanning laser radar system | |
| CN105759253A (en) | Laser scanning range finder | |
| CN111587382A (en) | Laser measuring device and unmanned vehicles | |
| CN210572728U (en) | Laser radar and laser radar system | |
| EP2664943A1 (en) | Optical signal transmission structure of laser distance measuring device | |
| CN109507679A (en) | A kind of laser scanner and laser radar system | |
| WO2016056543A1 (en) | Scanning optical system and radar | |
| JPWO2017135224A1 (en) | Optical scanning type object detection device | |
| CN205404796U (en) | Laser scanning distancer | |
| CN107102312A (en) | Laser scanning measurement instrument | |
| CN115267738A (en) | Laser radar | |
| CN214375247U (en) | Laser radar optical system and laser radar | |
| CN111060891A (en) | Laser radar | |
| US20200174102A1 (en) | Large field of view measurement devices for lidar | |
| US9429420B2 (en) | Distance measurement apparatus | |
| CN112255617B (en) | Can anti sunshine interference type laser scanning distancer | |
| JP3139050U (en) | Laser scanning optical engine device | |
| WO2017130942A1 (en) | Optical scanner | |
| JP2017049097A (en) | Laser radar device | |
| CN209433004U (en) | A kind of laser scanner and laser radar system | |
| WO2017065048A1 (en) | Optical-scanning-type object detection device | |
| CN207502552U (en) | rotary body detection device and system | |
| CN111308444A (en) | Laser radar system | |
| CN216646805U (en) | Laser radar | |
| JP2017125765A (en) | Object detection device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |