CN209248019U - A kind of optical system of laser radar - Google Patents
A kind of optical system of laser radar Download PDFInfo
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- CN209248019U CN209248019U CN201821841518.8U CN201821841518U CN209248019U CN 209248019 U CN209248019 U CN 209248019U CN 201821841518 U CN201821841518 U CN 201821841518U CN 209248019 U CN209248019 U CN 209248019U
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- laser
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- correction mirror
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Abstract
The utility model provides a kind of optical system of laser radar, which includes: laser beam emitting device, laser receiver, light path regulating device and counter weight device；Laser beam emitting device includes laser light source, laser conduction component, diversing lens；Laser receiver includes laser detector, laser conduction, receiving lens；Light path regulating device includes optical path correction mirror and shade；Light path regulating device is located at the front of laser beam emitting device and laser receiving device；Counter weight device is located at the rear of laser beam emitting device and laser receiver；This system is adjusted the laser of laser beam emitting device transmitting by light path regulating device and adjusts the received echo-signal of laser receiver, eliminate hot spot diverging, energy is not concentrated, caused by noise jamming the problem of range accuracy, the range performance that range accuracy improving laser device is improved for reducing signal interference plays an important role.
Description
Technical field
The utility model belongs to laser radar range technical field, and in particular to a kind of optical system of laser radar.
Background technique
In recent years, laser ranging technique by its high-precision, speed it is fast, it is small in size, not contact measurement the advantages that, become inspection
Survey technology field core technology is widely used in the fields such as warehouse logistics, location navigation, unmanned.
Laser radar system is got in measurement target using the laser beam of emission system transmitting, and measurement target is reflected back
Beam of laser light beam receives system by laser radar and receives, and the time difference received between back is launched according to the laser light velocity
Calculate the distance between laser radar and measurement target；But in actual measurement, due to the diverging of hot spot, energy does not collect
In, noise jamming etc. all can cause the range capability of laser radar and range accuracy to have an impact；Therefore signal interference is reduced to mention
High range accuracy plays a very important role to the performance boost of laser radar.
Summary of the invention
For the defects in the prior art, the optical system that the utility model provides a kind of laser radar can reduce hot spot
Diverging, concentrate energy, eliminate the interference of multiple echo.
The utility model provides a kind of optical system of laser radar, comprising: laser beam emitting device, laser receiver,
Light path regulating device and counter weight device, which is characterized in that
The laser beam emitting device includes: the laser light source for generating single beam or multiple laser；For changing transmitting
The laser conduction component of direction of laser propagation；Drum type diversing lens for being collimated to the laser of transmitting；
The laser receiver includes: that the reception that is focused of the laser echo signal for reflecting measured target is saturating
Mirror；For the echo-signal after focusing by changing the laser conduction in direction of propagation retroeflection to photodetector sensitive surface
Component；Received echo-signal is converted into the photodetector of corresponding electric signal；
The light path regulating device include: for transmitting laser or measured target reflection laser echo signal into
The correction mirror of row correction；The shade of system signal noise ratio is improved for filtering out other wavelength signals；
The counter weight device reduces shadow of the shaking to ranging of optical path in ranging process for balancing entire light path system
It rings；
Further, the laser conduction component is made of two pieces of parallel plane mirrors, the plane mirror with
The angle of horizontal plane is α, α≤45 °；For ensuring laser light source after reflection still from the optics of the diversing lens
Axle center is projected, and range performance is improved.
Further, the diversing lens are located on the direction of the laser conduction component laser emitting；For ensuring
The laser penetrated passes through the optical axis of the diversing lens；The receiving lens are located at the laser conduction component laser light incident
On direction；Ensure that incident laser passes through the optical axis of the diversing lens；The two is located in same level simultaneously.
Further, the diversing lens and the receiving lens are the lens of drum type.
Further, the correction mirror includes transmitting correction mirror and receives correction mirror, the transmitting correction mirror and described is connect
Correction mirror is received to be located in same level；The transmitting correction mirror is located at the front of the diversing lens, and the transmitting is rectified
The optical axis of the optical axis of telescope direct and the diversing lens is located on the same horizontal plane.The reception correction mirror is located at institute
The front of receiving lens is stated, and the optical axis for receiving correction mirror and the optical axis of the receiving lens are positioned at same
On a horizontal plane.
Further, the correction mirror is plano-convex cylindrical lens, and the hot spot form for correcting laser reduces the difference of hot spot,
Improve the performance of ranging.
Further, the shade is cone, and cone angle β, β≤2 °, the shade is located at described strong
The signal-to-noise ratio of system is reduced for filtering out the stray light in echo-signal in the front of telescope direct.
Further, the laser beam emitting device and the laser receiver are located at the two of optical system central axes
Side, and optical axis is parallel but is not overlapped.
Further, the counter weight device is located at behind the laser beam emitting device and the laser receiver, with
The laser beam emitting device and the laser receiver are symmetrical at front and back；Ensure entire light path system balance.
Further, the side of the counter weight device has been reserved symmetrical with repeated hole, is existed according to the light path system
Aequum in rotation adds corresponding counterweight.
Swashing after the collimation that optical system provided by the invention is emitted laser beam emitting device by light path regulating device
Light and the laser after converging laser receiver are adjusted, and reduce the diverging of hot spot, concentrate energy, eliminate multiple echo
Interference, improve optically focused range performance, while providing a method for laser radar Miniaturization Design.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is the present invention
Some embodiments for those of ordinary skill in the art without creative efforts, can also basis
These attached drawings obtain other attached drawings.
Fig. 1 is the optical texture schematic diagram of the utility model；
Fig. 2 is the whole light path schematic diagram of the utility model；
Specific embodiment
In order to be illustrated that the technical solution of the utility model more, it is illustrated now in conjunction with attached drawing.It should be appreciated that this
Locate described example to be used only for explaining the utility model, is not used to limit the utility model.
The utility model embodiment provides a kind of optical system of laser radar, and referring to Fig. 1, which includes: laser
Emitter (100), laser receiver (101), light path regulating device (102) and counter weight device (103)；
The laser beam emitting device (100) includes: the laser light source for generating single beam or multiple laser；For changing
Emit the laser conduction component of direction of laser propagation；Drum type diversing lens for being collimated to the laser of transmitting；
The laser receiver (101) includes: that the drum type for measured target reflection laser echo to be focused connects
Receive lens；Pass through in retroeflection to the sensitive surface of photodetector behind the change direction of propagation for the echo-signal after focusing
Laser conduction component；The echo-signal later for collectiong focusing, and export the photodetector of corresponding electric signal；
The light path regulating device (102) includes: for the laser or the reflected laser of measured target to transmitting
The correction mirror that echo-signal is corrected；The cone for the signal-to-noise ratio that signal for filtering out other wavelength improves system filters
Cover；
The counter weight device (103) is mainly used for balancing entire light path system, reduces the shaking pair of optical path in ranging process
The influence of ranging；
The specific work process of above-mentioned optical system is given below, as shown in Fig. 2, lasing fluorescence source (1) is with certain frequency
Rate emits laser beam, and laser is reflected into the second transmitting reflecting mirror (3) due to two reflecting mirrors by the first transmitting reflecting mirror (2)
It is parallel and the angle of the two and horizontal plane is 30 °, in this way by the laser beam after two secondary reflections perpendicular through connecing
The optical axis for receiving lens (4), due to the lens that diversing lens (4) are drum type, blind area is small, in this way can to the laser of transmitting into
Row collimation, the laser after collimating are corrected laser using transmitting correction mirror (5) and generate hot spot form by shade (11)
Distortion, the Laser emission after correcting are gone out.The laser launched is returned by baffle reflection, is wrapped in reflected signal
Echo-signal and interference of stray light signal are contained, signal filters out spuious by the conical shade (11) that cone angle is 1 °
Light interferes to obtain echo-signal, and due to the hot spot form partition of the influence echo-signal of shade, echo-signal is by connecing
It receives correction mirror (6) and the hot spot of distortion is subjected to correction compensation, the echo-signal after correcting is gathered by receiving lens (7)
It is burnt, it is ensured that the echo-signal after focusing injects first along the optical axis direction of receiving lens (7) and receives reflecting mirror (10),
First, which receives reflecting mirror (10), is reflected into the second reception reflecting mirror (8) for the echo-signal after focusing, since two receptions are anti-
Penetrate that mirror is parallel and the angle of the two and horizontal plane is 30 °, in this way by the laser beam after two secondary reflections along connecing
The optical axis for receiving lens (7) is radiated on the photosurface of photodetector, and echo-signal is converted into electricity by photodetector
Signal is realizing ranging by the conversion of circuit.
In the embodiments of the present invention, after counter weight device (12) is located at laser beam emitting device and laser receiving device
Face, it is symmetrical at front and back with laser beam emitting device and laser receiving device；Ensure the spin balancing of entire light path system；Counter weight device
(12) side has been reserved symmetrical with repeated hole, is added according to balance of the light path system in rotation corresponding
Counterweight.
Above-described embodiment is only a preferred embodiment of the utility model, the substantive skill being not intended to limit the utility model
Art context, the substantial technological content of the utility model are broadly defined in the scope of the claims of application, it is any he
The technology entities or method that people completes, it is also or a kind of etc. if identical with defined in the scope of the claims of application
The change of effect will be considered as being covered by among the scope of the claims.
Claims (10)
1. a kind of optical system of laser radar, comprising: laser beam emitting device, laser receiver, light path regulating device and match
Refitting is set, which is characterized in that
The laser beam emitting device includes: the laser light source for generating single beam or multiple laser；For changing transmitting laser
The laser conduction component of the direction of propagation；Drum type diversing lens for being collimated to the laser of transmitting；
The laser receiver includes: the receiving lens that the laser echo signal for reflecting measured target is focused；
For the echo-signal after focusing by changing the laser conduction group in direction of propagation retroeflection to photodetector sensitive surface
Part；For received echo-signal to be converted into the photodetector of corresponding electric signal；
The light path regulating device include: for transmitting laser or measured target reflection laser echo signal rectify
Positive correction mirror；System signal noise ratio shade is improved for filtering out other wavelength signals；
For the counter weight device for balancing entire light path system, the shaking for reducing optical path in ranging process influences ranging.
2. system according to claim 1, which is characterized in that the laser conduction component is by two pieces of parallel plane reflections
Microscope group is at the angle of the plane mirror and horizontal plane is α, α≤45 °, for ensuring laser light source after reflection still
It is so projected from the optical axis of the diversing lens, improves range performance.
3. system according to claim 1, which is characterized in that the diversing lens are located at the laser conduction component laser
On the direction of outgoing, the laser for ensuring to be emitted passes through the optical axis of the diversing lens；The receiving lens are located at institute
On the direction for stating laser conduction component laser light incident, for ensuring that incident laser passes through the optical axis of diversing lens, simultaneously
The diversing lens and the receiving lens are located in same level.
4. system according to claim 3, which is characterized in that the diversing lens and the receiving lens are the saturating of drum type
Mirror.
5. system according to claim 1, which is characterized in that the correction mirror includes transmitting correction mirror and reception correction
Mirror, the transmitting correction mirror and the reception correction mirror are located in same level；The transmitting correction mirror is located at the transmitting
The front of lens, and the optical axis of the transmitting correction mirror and the optical axis of the diversing lens are located at the same horizontal plane
On；The front for receiving correction mirror and being located at the receiving lens, and the optical axis for receiving correction mirror and the reception
The optical axis of lens is located on the same horizontal plane.
6. system according to claim 5, which is characterized in that the correction mirror is plano-convex cylindrical lens, for correcting laser
Hot spot form reduce hot spot difference, improve the performance of ranging.
7. system according to claim 1, which is characterized in that the shade be cone, cone angle β, β≤
2°；The noise of system is reduced for filtering out the stray light in echo-signal in the front that the shade is located at the correction mirror
Than.
8. system according to claim 1, which is characterized in that the laser beam emitting device and the laser receiver point
Not Wei Yu optical system central axes two sides, and optical axis is parallel but is not overlapped.
9. system according to claim 1, which is characterized in that the counter weight device is located at the laser beam emitting device and institute
The rear for stating laser receiver, it is symmetrical at front and back with the laser beam emitting device and the laser receiver, for ensuring
Entire light path system balance.
10. system according to claim 1, which is characterized in that the side of the counter weight device, which is equipped with, matches repeated hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821841518.8U CN209248019U (en) | 2018-11-09 | 2018-11-09 | A kind of optical system of laser radar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821841518.8U CN209248019U (en) | 2018-11-09 | 2018-11-09 | A kind of optical system of laser radar |
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| Publication Number | Publication Date |
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| CN209248019U true CN209248019U (en) | 2019-08-13 |
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ID=67527612
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821841518.8U Active CN209248019U (en) | 2018-11-09 | 2018-11-09 | A kind of optical system of laser radar |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021196929A1 (en) * | 2020-04-02 | 2021-10-07 | 杭州欧镭激光技术有限公司 | Laser radar receiving system |
| WO2023103728A1 (en) * | 2021-12-08 | 2023-06-15 | 陈家梁 | Laser radar probe and laser radar |
-
2018
- 2018-11-09 CN CN201821841518.8U patent/CN209248019U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021196929A1 (en) * | 2020-04-02 | 2021-10-07 | 杭州欧镭激光技术有限公司 | Laser radar receiving system |
| WO2023103728A1 (en) * | 2021-12-08 | 2023-06-15 | 陈家梁 | Laser radar probe and laser radar |
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