CN105891802A - Laser radar system based on coaxial light path, automobile head lamp and automobile rearview mirror - Google Patents
Laser radar system based on coaxial light path, automobile head lamp and automobile rearview mirror Download PDFInfo
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- CN105891802A CN105891802A CN201610371420.XA CN201610371420A CN105891802A CN 105891802 A CN105891802 A CN 105891802A CN 201610371420 A CN201610371420 A CN 201610371420A CN 105891802 A CN105891802 A CN 105891802A
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- Prior art keywords
- laser
- radar system
- light path
- acceptance division
- laser radar
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
- G01S7/481—Constructional features, e.g. arrangements of optical elements
- G01S7/4811—Constructional features, e.g. arrangements of optical elements common to transmitter and receiver
- G01S7/4812—Constructional features, e.g. arrangements of optical elements common to transmitter and receiver transmitted and received beams following a coaxial path
Abstract
The invention provides a laser radar system based on a coaxial light path, an automobile head lamp and an automobile rearview mirror. The laser radar system based on the coaxial light path comprises an optical mirror, a laser emitter and a laser receiver, wherein the optical mirror comprises a receiving part and an emitting part; the receiving part and the emitting part are coaxially arranged; the receiving part is used for receiving laser signals emitted from the laser emitter; the emitting part is used for feeding back the laser signals to the laser receiver. According to the laser radar system based on the coaxial light path, the automobile head lamp and the automobile rearview mirror provided by the invention, the optical mirror comprises the receiving part and the emitting part, and the receiving part and the emitting part are coaxially arranged, so that the purpose of positioning the receiving part and the emitting part of the optical mirror on a coaxial light path is effectively achieved, the space occupied by the laser radar system is effectively reduced, the situation that electromagnetic interference can be easily caused by the laser radar system in a complex working environment is also reduced, and furthermore the use stability and reliability of the laser radar system are improved.
Description
Technical field
The present invention relates to automobile technical field, be specifically related to a kind of laser radar system based on coaxial light path
System, automobile front and automobile rearview mirror.
Background technology
Along with the progress of science and technology and economic developing rapidly, quality of life is required increasingly by people
Height, this walking-replacing tool of automobile also becomes to become more and more popular, extensively, along with the variation of automobile brand,
Quality requirement and the security performance of automobile are promoted by people the most therewith.
In the prior art, in order to improve the security system of automobile, on automobile, all safety has for surveying
Away from laser radar system, this laser radar system is applied to intelligent emergency autobrake system, permissible
It is prevented effectively from the generation of the situation such as vehicle rear-end collision or collision, protects the property safety of vehicle.
But, during inventor implements the technical program, find existing laser radar system one
As include the emission system and the reception system that are set up in parallel, the laser signal that emission system is launched is through one
Optical frames is launched, and reception system is received the laser signal returned through another optical frames, due to
Emission system and reception system are set up in parallel, and therefore increase the volume of laser transmitting system, meanwhile,
Under complicated working environment, emission system and reception system easily produce electromagnetic interference, and then have impact on sharp
The serviceability of optical detection and ranging system.
Summary of the invention
After the invention provides a kind of laser radar system based on coaxial light path, automobile front and automobile
Visor, effectively reduces volume, reduces the electromagnetic interference of receive-transmit system simultaneously, is effectively improved
The reliability that laser radar system uses.
An aspect of of the present present invention has been to provide for a kind of laser radar system based on coaxial light path, bag
Include: an optical frames, generating laser and laser pickoff；
Described optical frames, including: acceptance division and emission part, described acceptance division is concentric with described emission part to be set
Putting, described acceptance division is for receiving the laser signal of described laser transmitter projects, and described emission part is used for
To described laser pickoff return laser light signal.
Laser radar system based on coaxial light path as above, described optical frames includes: aspherical mirror
And level crossing, described level crossing is arranged on the right side of described aspherical mirror and is connected with described aspherical mirror,
Wherein, the right side of described aspherical mirror is planar structure；Described aspherical mirror includes for first curvature radius
Acceptance division and be the emission part of second curvature radius, described emission part is around being arranged at described acceptance division
Outside and be connected with described acceptance division.
Laser radar system based on coaxial light path as above, described generating laser, it is arranged at institute
State on the optical axis of optical frames, for launching laser signal to described acceptance division；
Described laser pickoff, is arranged on the optical axis of described optical frames, for receiving through described transmitting
The laser signal that portion returns.
Laser radar system based on coaxial light path as above, described generating laser is arranged at described
In the acceptance division focus away from described level crossing side；
Described laser pickoff is arranged in the described emission part focus away from described level crossing side.
Laser radar system based on coaxial light path as above, the focal length of described emission part is more than described
The focal length of acceptance division.
Laser radar system based on coaxial light path as above, also includes: a semi-transparent semi-reflecting lens, institute
State semi-transparent semi-reflecting lens to be arranged between described generating laser and described optical frames；
Described generating laser, is arranged on the optical axis of described optical frames, for by described semi-transparent semi-reflecting
Mirror launches laser signal to described acceptance division；
Described laser pickoff, with the both sides that described generating laser is arranged at described semi-transparent semi-reflecting lens, uses
In receiving through the return of described emission part and the laser signal after described semi-transparent semi-reflecting lens reflects.
Laser radar system based on coaxial light path as above, the both sides of described optical frames are coated with anti-reflection
Film, the applicable wave band of described anti-reflection film includes 905nm ± 10nm or 633nm ± 10nm.
Laser radar system based on coaxial light path as above, described acceptance division and emission part are by stone
English material is constituted, and wherein, circular cone coefficient c is-2.107；Or,
Described acceptance division and emission part are constituted by H-K9I glass, and wherein, circular cone coefficient c is-2.276
Or-2.275.
Another aspect of the present invention is to provide for a kind of automobile front, including above-mentioned based on axis light
The laser radar system on road.
Another aspect of the invention is to provide for a kind of automobile rearview mirror, including above-mentioned based on axis light
The laser radar system on road.
Laser radar system based on coaxial light path, automobile front and the automotive rear-view that the present invention provides
Mirror, by optical frames is set to include acceptance division and emission part, and acceptance division is same with described emission part
The heart is arranged, and then have effectively achieved the acceptance division of optical frames and emission part is positioned in coaxial light path, effectively
Reduce this laser radar system take volume, also reduce this laser radar system in complexity simultaneously
Working environment under easily produce the situation of electromagnetic interference, further increase this laser radar system and use
Reliability, and then the personal safety as well as the property safety of automobile and driver and crew is defined effective guarantee,
Be conducive to popularization and the application in market.
Accompanying drawing explanation
Fig. 1 is that the structure of the laser radar system based on coaxial light path given by one embodiment of the invention is shown
It is intended to；
Fig. 2 is the structure of the laser radar system based on coaxial light path given by another embodiment of the present invention
Schematic diagram；
Fig. 3 is the structural representation of the automobile front given by the embodiment of the present invention；
Fig. 4 is the structural representation of the automobile rearview mirror given by the embodiment of the present invention.
In figure:
1, optical frames；11, acceptance division；
12, emission part；13, level crossing；
2, generating laser；3, laser pickoff；
4, laser radar system；5, semi-transparent semi-reflecting lens.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearer, implement below in conjunction with the present invention
Accompanying drawing in example, is clearly and completely described the technical scheme in the embodiment of the present invention, it is clear that
Described embodiment is a part of embodiment of the present invention rather than whole embodiments.Give the present invention
Embodiment, the institute that those of ordinary skill in the art are obtained on the premise of not making creative work
There are other embodiments, broadly fall into the scope of protection of the invention.
Below in conjunction with the accompanying drawings and embodiment, the detailed description of the invention of the present invention is described in further detail.
Following instance is used for illustrating the present invention, but is not limited to the scope of the present invention.
Fig. 1 is the structural representation of the laser radar system based on coaxial light path given by the embodiment of the present invention
Figure；Understand with reference to accompanying drawing 1, present embodiments provide a kind of laser radar system based on coaxial light path,
Should be used for being arranged on automobile by laser radar system based on coaxial light path, it is achieved the function of laser ranging,
Concrete, should include by laser radar system based on coaxial light path: an optical frames 1, generating laser 2
With laser pickoff 3；
Optical frames 1, including: acceptance division 11 and emission part 12, described acceptance division 11 and described emission part
12 are arranged concentrically, and described acceptance division 11 is used for receiving the laser signal that described generating laser 2 is launched,
Described emission part 12 is for described laser pickoff 3 return laser light signal.
Wherein, it is set to be arranged concentrically by acceptance division 11 and emission part 12, i.e. makes acceptance division 11 and send out
Penetrate portion 12 to be positioned in coaxial light path, so can be effectively realized the laser that generating laser 2 is to be launched
Signal and laser pickoff 3 signal to be received just can realize this laser through an optical frames 1
The application process of radar system, and then can be effectively improved for laser radar signal reception and launch
Efficiency；Meanwhile, for two optical frames of the prior art, optical frames is effectively reduced
Area occupied；Additionally, the concrete material for optical frames 1 does not limits, those skilled in the art can
To be configured according to concrete design requirement, do not repeat them here；It addition, for the tool of optical frames 1
Shape does not limits, and those skilled in the art can be according to concrete design requirement, for example, it is possible to incite somebody to action
Optical frames 1 is provided in round or ellipsoidal structure etc., includes receiving as long as enabling to optical frames 1
Portion 11 and emission part 12, do not repeat them here；Further, for acceptance division 11 and emission part 12
Concrete shape structure do not limit, those skilled in the art can set according to concrete design requirement
Put, for example, it is possible to acceptance division 11 and emission part 12 are provided around structure, such as, by acceptance division
11 centers being arranged at optical frames 1, are arranged at the marginal position etc. of optical frames 1 by emission part 12
Deng, as long as enabling to acceptance division 11 and emission part 12 is capable of corresponding functional effect,
This repeats no more.
The laser radar system based on coaxial light path that the present embodiment provides, by arranging a piece of optical frames,
By optical frames is set to include acceptance division and emission part, and acceptance division is concentric with described emission part sets
Put, and then have effectively achieved the acceptance division of optical frames and emission part is positioned in coaxial light path, i.e. can lead to
Cross an optical frames 1 and can realize the application of this laser radar system, effectively reduce this laser radar
System take volume, also reduce this laser radar system simultaneously and easily produce under complicated working environment
The situation of raw electromagnetic interference, further increases the reliability that this laser radar system uses, and then
The personal safety as well as the property safety of automobile and driver and crew is defined effective guarantee, beneficially the popularization in market with
Application.
On the basis of above-described embodiment, understanding with continued reference to accompanying drawing 1, the present embodiment is for optical frames 1
Concrete shape structure do not limit, those skilled in the art can set according to concrete design requirement
Put, wherein, the most preferably, be set to include by optical frames 1: aspherical mirror and level crossing 13, should
Level crossing 13 is arranged on the right side of aspherical mirror and is connected with aspherical mirror, wherein, and the right side of aspherical mirror
Side is planar structure；Aspherical mirror includes for the acceptance division 11 of first curvature radius with for second curvature radius
Emission part 12, and emission part 12 around be arranged at acceptance division 11 outside and with acceptance division 11
It is connected.
Wherein, it is set to optical frames 1 include in aspherical mirror and level crossing 13, and this embodiment
Aspheric right side is planar structure, then it is to say, what this aspherical mirror was connected with level crossing 13
Face is plane, and what generating laser 2 can be launched by the aspherical mirror of employing said structure effectively swashs
Optical signal expands, and improves the scope that laser signal is covered, and then expands by this laser thunder
The system of reaching carries out the scope found range, and improves the practicality of this laser radar system；Additionally, for plane
Mirror 13 does not limits with the concrete connected mode of aspherical mirror, and those skilled in the art can be according to concrete
Design requirement is configured, for example, it is possible to level crossing 13 and aspherical mirror are set to integrated formed structure,
Or can also be set to be connected by binder phase by level crossing 13 and aspherical mirror, as long as being capable of
Level crossing 13 is stably connected with effect with aspheric, does not repeats them here.
It addition, the concrete shape structure for acceptance division 11 and emission part 12 does not limits, art technology
Personnel can be configured according to concrete design requirement, such as, be provided in round by acceptance division 11, oval
The structure such as shape or rectangle, is set to the circular ring structure or irregular ellipse of more rule by emission part 12
Circular annular form structure etc., as long as being capable of emission part 12 around being arranged at the outside of acceptance division 11 i.e.
Can, do not repeat them here；Furthermore, it is desirable to it is noted that first curvature radius in the present embodiment and the
Two zone radius are unequal, and the concrete numerical value for first curvature radius and second curvature radius does not limits,
For example, it is possible to first curvature radius to be set greater than second curvature radius, or by first curvature radius
Being set smaller than second curvature radius, those skilled in the art can be according to acceptance division 11 and emission part 12
Concrete material and be configured according to concrete design requirement, do not repeat them here.
On the basis of above-described embodiment, understand, when optical frames 1 includes aspherical with continued reference to accompanying drawing 1
When mirror and level crossing 13, the particular location arranged for generating laser 2 and laser pickoff 3 does not limits
Fixed, those skilled in the art can be configured according to concrete design requirement, wherein it is possible to by laser
Transmitter 2, is arranged on the optical axis of optical frames 1, for launching laser signal to acceptance division 11；
Laser pickoff 3, is arranged on the optical axis of optical frames 1, returns through emission part 12 for receiving
Laser signal.
Wherein, the concrete structure for generating laser 2 and laser pickoff 3 does not limits, this area
It arbitrarily can be set by technical staff according to concrete design requirement and its functional effect realized
Put, do not repeat them here；It addition, be arranged on optical frames for generating laser 2 and laser pickoff 3
Particular location on the optical axis of 1 does not limits, wherein, in order to improve the intensity of laser firing signals and connect
Receive laser signal reception, the most preferably, generating laser 2 is arranged at acceptance division 11 away from
In the focus of level crossing 13 side；Laser pickoff 3 is arranged at emission part 12 away from level crossing 13 1
In the focus of side, wherein, unequal with second curvature radius due to first curvature radius so that acceptance division
The various location that the focus of 11 and the Focus Club of emission part 12 are positioned on optical axis, and then can be effectively
Strengthen generating laser 2 and the transmitting of laser pickoff 3 and reception, it is ensured that this laser radar system
The reliability that system uses.
The present embodiment provide laser radar system based on coaxial light path, by by generating laser 2,
Laser pickoff 3 is arranged on the optical axis of optical frames 1, it is achieved that generating laser 2, laser pickoff 3
It is coaxially disposed with optical frames 1, effectively reduces the volume that takies of this laser radar system, and due to
Acceptance division 11 is different with the radius of curvature of emission part 12, therefore, can make acceptance division 11 and emission part
The focus of 12 is positioned on the diverse location of optical axis, in order to improve the effect of Laser emission and reception, by inciting somebody to action
In the different focuses that generating laser 2 and laser pickoff 3 are arranged on optical axis, efficiently reduce this
Laser radar system easily produces the situation of electromagnetic interference under complicated working environment, further increases
The reliability that this laser radar system uses, and then the personal property of automobile and driver and crew is pacified
Entirely define popularization and the application of effective guarantee, beneficially market.
On the basis of above-described embodiment, understanding with continued reference to accompanying drawing 1, the present embodiment is for emission part 12
Focal length and the focal length of acceptance division 11 do not limit, wherein, the most preferably, by emission part 12
Focal length be set greater than the focal length of acceptance division 11.
Wherein, owing to focal length is proportional with radius of curvature, therefore, when the focal length of emission part 12 is more than receiving
During the focal length in portion 11, then the second curvature radius of explanation emission part 12 is more than the first curvature of acceptance division 11
Radius, and the focus of emission part 12 is more than the focus of acceptance division 11, then, send out to improve laser
The Laser emission energy of emitter 2 and the laser pick-off energy of laser pickoff 3, the most preferably, will
Generating laser 2 is arranged in the focus of acceptance division 11, and laser pickoff 3 is arranged on emission part 12
In focus, so make, generating laser 2 for laser pickoff 3 closer to optical frames 1,
The laser signal that generating laser 2 is launched is launched by acceptance division 11, laser pickoff 3
Received the laser signal returned by emission part 12, be effectively guaranteed laser firing signals and laser pick-off
The signal energy of signal, further increases the reliability that this laser radar system uses.
Fig. 2 is the structure of the laser radar system based on coaxial light path given by another embodiment of the present invention
Schematic diagram；On the basis of above-described embodiment, understand with continued reference to accompanying drawing 2, present embodiments provide another
A kind of laser radar system based on coaxial light path, when optical frames 1 is set to include aspherical mirror peace
During the mirror 13 of face, the particular location arranged for generating laser 2 and laser pickoff 3 does not limits, this
Skilled person can be configured according to concrete design requirement, wherein it is possible to should be based on coaxially
The laser radar system of light path is set to also include: a semi-transparent semi-reflecting lens 5, and this semi-transparent semi-reflecting lens 5 is arranged
Between generating laser 2 and optical frames 1；
Generating laser 2, is arranged on the optical axis of optical frames 1, is used for by semi-transparent semi-reflecting lens 5 to institute
State acceptance division 11 and launch laser signal；
Laser pickoff 3, the both sides with generating laser 2 is arranged at semi-transparent semi-reflecting lens 5, it is used for receiving
Through emission part 12 return and through semi-transparent semi-reflecting lens 5 reflect after laser signal.
Wherein, the structure of semi-transparent semi-reflecting lens 5 is that side can carry out transmission to optical signal, and opposite side can
So that optical signal to be reflected, the most i.e. achieve above-mentioned light path system；It addition, for semi-transparent semi-reflecting lens
The 5 concrete angles arranged do not limit, and those skilled in the art can be carried out according to concrete design requirement
Arrange, such as semi-transparent semi-reflecting lens 5 can be set to the optical axis of optical frames 1 be 45 ° of angles, 60 °
Angle etc., as long as being capable of above-mentioned technique effect.
The laser radar system based on coaxial light path that the present embodiment provides, equally reaches to reduce this
The effect taking volume of laser radar system, and also this laser radar system can be efficiently reduced
Under complicated working environment, easily produce the situation of electromagnetic interference, further increase this laser radar system
The reliability that system uses, and then the personal safety as well as the property safety of automobile and driver and crew is defined effectively
The popularization of guarantee, beneficially market and application.
Certain, those skilled in the art can arrange other with the know-why that the technical program is provided
The laser radar system based on coaxial light path of structure, such as, by generating laser 2 and laser pickoff
3 sizes arranged are sufficiently small, then generating laser 2 and laser pickoff 3 are arranged on approximation same
Position, then generating laser 2 can launch laser signal to acceptance division 11, and laser pickoff 3 can
To receive the laser signal that emission part 12 is returned, the above-mentioned technology of the technical program can also be realized equally
Effect, and more efficiently decrease the volume shared by this system, improve the practicality of this system.
On the basis of above-described embodiment, understand, at generating laser 2 and laser with continued reference to accompanying drawing 1
During receiver 3 carries out transmitting and the reception of laser signal by optical frames 1, due to laser signal
Reflection case can be there is, therefore, in order to reduce laser signal by this optical frames 1 by optical frames 1
The both sides of optical frames 1 are coated with anti-reflection film by reflection loss.
Wherein, the concrete material for anti-reflection film does not limits, and those skilled in the art can be according to specifically
Design requirement be configured, as long as being capable of reducing laser signal by the reflection loss of optical frames 1
Effect, do not repeat them here；It addition, the concrete shape for anti-reflection film setting does not limits,
Those skilled in the art can be configured according to concrete design requirement, wherein, the most preferably, and will
Anti-reflection film is shaped to and the mating shapes of optical frames 1 both sides, and it is right so can effectively to ensure
Optical frames 1 realizes reducing the effect of the reflection loss of laser signal, it is ensured that this laser radar system uses
Reliability；Additionally, the laser wavelength being suitable for for this anti-reflection film does not limits, wherein, relatively
For preferably, be set to the laser wavelength being suitable for of anti-reflection film to include 905nm ± 10nm or 633nm ±
10nm, then it is to say, when laser wavelength is 905nm ± 10nm or 633nm ± 10nm, pass through
The anti-reflection film of this setting, can efficiently reduce the reflection loss of laser signal, it is ensured that generating laser 2
Transmitting with laser pickoff 3 and reception, improve the use power of this laser radar system, enter
One step improves the practicality of this laser radar system.
On the basis of above-described embodiment, understanding with continued reference to accompanying drawing 1, the present embodiment is for acceptance division 11
Not limiting with the concrete composition material of emission part 12, those skilled in the art can be according to concrete design
Demand is configured, and wherein, the most preferably, can acceptance division 11 and emission part 12 be disposed as
Being made up of quartz material, wherein, circular cone coefficient c is-2.107, or, it is also possible to by acceptance division 11 He
Emission part 12 is disposed as being made up of H-K9I glass, and wherein, circular cone coefficient c is-2.276 or-2.275,
By circular cone coefficient is set to above-mentioned parameters, can effectively determine the concrete face type of this optical frames,
Base benefactor ensures the reliability that optical frames uses effectively.
Wherein, for H-K9I glass, for the one of colouless optical glass, for colourless optics glass
Glass, by the name of unleaded, arsenic, the cadmium glass trade mark initial consonant " H " of " ring " word Chinese phonetic alphabet,
Add "-" to represent as prefix, such as: H-K9L glass, by the H-K9I glass arranged, effectively
Ensure transmitting and the reception of laser signal；And acceptance division 11 and emission part 12 are set to by quartz
Constituting, owing to quartz is relatively conventional, and hardness is higher, therefore, reduces raw materials for production cost, and
And all right ensure the reliability that this laser radar system uses.
Fig. 3 is the structural representation of the automobile front given by the embodiment of the present invention；At above-described embodiment
On the basis of, understand with continued reference to accompanying drawing 3, present embodiments provide a kind of automobile front, this automobile
Headlight is used for being installed on automobile, for being irradiated the front of automobile, wherein, big before this automobile
Lamp is provided with above-mentioned laser radar system based on coaxial light path 4.
Wherein, laser radar system 4 based on coaxial light path is arranged on to the concrete position of automobile front
Putting and do not limit, those skilled in the art can be configured according to concrete design requirement, such as, and can
So that this laser radar system 4 based on coaxial light path is arranged at the side of lamp body in automobile front, this
Sample does not the most affect the illuminating effect of automobile front, additionally it is possible to effectively ensure laser based on coaxial light path
The using effect of radar system 4.
The automobile front that the present embodiment provides, by the laser radar system based on coaxial light path arranged
4, while not affecting automobile front illuminating effect, have effectively achieved the barrier to vehicle front
Carry out the effect found range, concrete, by by generating laser 2, laser pickoff 3 and optical frames 1
It is set to be coaxially disposed, is effectively improved the effect of Laser emission and reception, by by generating laser
2 and the different focuses that are arranged on optical axis of laser pickoff 3 on, efficiently reduce this laser radar system
System 4 easily produces the situation of electromagnetic interference under complicated working environment, before further increasing this automobile
The reliability that headlight uses, and then the personal safety as well as the property safety of automobile and driver and crew has been defined
The popularization of effect guarantee, beneficially market and application.
Fig. 4 is the structural representation of the automobile rearview mirror given by the embodiment of the present invention, at above-described embodiment
On the basis of, understand with continued reference to accompanying drawing 4, present embodiments provide a kind of automobile rearview mirror, this automobile
Rearview mirror is installed on car body, for pointing out driver the ambient conditions being positioned at rear view of vehicle, concrete,
This automobile rearview mirror includes above-mentioned laser radar system based on coaxial light path 4.
Wherein, laser radar system 4 based on coaxial light path is arranged on to the concrete position of automobile rearview mirror
Putting and do not limit, those skilled in the art can be configured according to concrete design requirement, such as, and can
Automobile rearview mirror is deviated to be arranged on automobile rearview mirror by this laser radar system 4 based on coaxial light path
In the side of minute surface, the most do not affect the prompting effect of automobile rearview mirror, additionally it is possible to effectively ensure
The using effect of laser radar system 4 based on coaxial light path.
The automobile rearview mirror that the present embodiment provides, by the laser radar system based on coaxial light path arranged
4, while not affecting automobile rearview mirror illuminating effect, have effectively achieved the barrier to vehicle front
Carry out the effect found range, concrete, by by generating laser 2, laser pickoff 3 and optical frames 1
It is set to be coaxially disposed, is effectively improved the effect of Laser emission and reception, by by generating laser
2 and the different focuses that are arranged on optical axis of laser pickoff 3 on, efficiently reduce this laser radar system
System 4 easily produces the situation of electromagnetic interference under complicated working environment, after further increasing this automobile
The practicality of visor, and then the personal safety as well as the property safety of automobile and driver and crew is defined effective guarantee,
Be conducive to popularization and the application in market.
During specific design, the technical program provides one and can be fused to launching with receiving optics
The laser radar system of coaxial one, is laser radar system based on coaxial light path, relative to existing
For laser radar system in technology, effectively reduce the volume of structure, also reduce this simultaneously and swash
Electromagnetic interference produced by optical detection and ranging system, improves laser radar system and uses under complicated environmental condition
Performance, concrete, this automobile wine steel radar system includes: by optical frames 1, generating laser 2 and swash
Optical receiver 3 forms, and wherein, optical frames 1 includes aspherical mirror and level crossing 13, wherein, aspherical
Mirror is the minute surface of 1 two kinds of radius of curvature, and two kinds of radius of curvature are respectively the acceptance division of first curvature radius
11 and the emission part 12 of second curvature radius, relatively conventional, as a example by kart, generally will receive
Portion 11 and emission part 12 are disposed as being made up of quartz material, and aspherical mirror by center to
Radius R is that wherein, clear aperture is 6mm, and focal length is 15mm for acceptance division 11 in the range of 3mm；And
Emission part 12 being set to radius in the range of R3mm-R8.5mm, the clear aperature of this emission part 12 is
△ R5mm, focal length is 50mm；Acceptance division 11 and emission part 12 are set to coaxially, and at optical frames
The anti-reflection film of both sides plating 905nm Yu 633nm of 1 so that the one side transmitance of this optical frames 1 > 99.5%,
And then can effectively ensure this laser radar system overall transmitance in using wavelength band > 99%,
Further ensure the reliability that this laser radar system uses.
In order to more understand the realization of laser radar system based on coaxial light path that the technical program provided
Process, enumerates specific examples below and illustrates, concrete:
Application Example one
The aspherical mirror of 1 hyperbolicity radius, plane should be included by laser radar system based on coaxial light path
Mirror 13, generating laser 2 and laser pickoff 3 form, and wherein, aspherical mirror includes acceptance division 11
With emission part 12；
The material of acceptance division 11 is quartz, and focal length is 15mm, and center thickness is 2.52mm, clear aperture
For 6mm；Wherein this central area, face is aspherical, first curvature radius be 6.775mm, c be-2.107；
The material of emission part 12 is quartz, and focal length is 50mm, and center thickness is 2mm, and clear aperature is △
R5mm；Wherein this central area, face is aspherical, second curvature radius 22.584mm, and c is-2.107；
Wherein, acceptance division 11 and emission part 12 are coaxial, and by generating laser 2 and laser pickoff
3 are arranged on optical axis, and generating laser 2 is arranged at the focal position of acceptance division 11, laser pickoff
3 focal position being arranged at emission part 12.
This system, based on light propagation law, by 1 shape optimization of optical frames, is designed as aspherical type,
Elimination system spherical aberration, and choose the quartz material that thermal coefficient of expansion is less, make this laser radar simultaneously
The system overall transmitance in using wavelength band > 99%, make laser radar system in use have
Standby preferable detection performance.
Application Example two
Different size based on automobile model, and the different demands of designer, it is also possible to should be based on
The laser radar system of coaxial light path is set to include: the aspherical mirror of 1 hyperbolicity radius, level crossing
13, generating laser 2 and laser pickoff 3 form, and wherein, aspherical mirror includes acceptance division 11 and sends out
Penetrate portion 12；
The material of acceptance division 11 is H-K9L glass, and focal length is 13mm, and center thickness is 2mm, light admission port
Footpath is 6mm；Wherein this central area, face is aspherical, first curvature radius be 6.61mm, c be-2.276；
The material of emission part 12 is H-K9L glass, and focal length is 50mm, and center thickness is 2mm, light hole
Footpath is △ R5mm；Wherein this central area, face is aspherical, second curvature radius 25.42mm, and c is
-2.276；
Wherein, acceptance division 11 and emission part 12 are coaxial, and by generating laser 2 and laser pickoff
3 are arranged on optical axis, and generating laser 2 is arranged at the focal position of acceptance division 11, laser pickoff
3 focal position being arranged at emission part 12.
This system is equally based on light propagation law, by 1 shape optimization of optical frames, is designed as aspherical
Face type, eliminates system spherical aberration, and chooses the quartz material that thermal coefficient of expansion is less, makes this swash simultaneously
The optical detection and ranging system overall transmitance in using wavelength band > 99%, make laser radar system use
Journey possesses preferable detection performance.
Application Example three
Different size based on automobile model, and the different demands of designer, it is also possible to should be based on
The laser radar system of coaxial light path is set to include: the aspherical mirror of 1 hyperbolicity radius, level crossing
13, generating laser 2 and laser pickoff 3 form, and wherein, aspherical mirror includes acceptance division 11 and sends out
Penetrate portion 12；
The material of acceptance division 11 is H-K9L glass, and focal length is 22mm, and center thickness is 10mm, logical light
Bore is 20mm；Wherein this central area, face is aspherical, and first curvature radius is that 11.187mm, c are
-2.275；
The material of emission part 12 is H-K9L glass, and focal length is 60mm, and center thickness is 10mm, logical light
Aperture is △ R13mm；Wherein this central area, face is aspherical, second curvature radius 30.51mm, and c is
-2.275；
Wherein, acceptance division 11 and emission part 12 are coaxial, and by generating laser 2 and laser pickoff
3 are arranged on optical axis, and generating laser 2 is arranged at the focal position of acceptance division 11, laser pickoff
3 focal position being arranged at emission part 12.
This system is equally based on light propagation law, by 1 shape optimization of optical frames, is designed as aspherical
Face type, eliminates system spherical aberration, and chooses the quartz material that thermal coefficient of expansion is less, makes this swash simultaneously
The optical detection and ranging system overall transmitance in using wavelength band > 99%, make laser radar system use
Journey possesses preferable detection performance.
Certain, those skilled in the art can also be according to different design requirements by above-mentioned acceptance division 11 He
The parameters such as the clear aperture of emission part 12, clear aperature, radius of curvature, focal length and material are carried out arbitrarily
Arranging, as long as being capable of above-mentioned technique effect, not repeating them here.
When specifically applying, the laser radar system based on coaxial light path in the technical program can be as vapour
Topmost detection device in the pre-crashproof detection alarm brakes of car, the pre-crashproof detection alarm of automobile is braked
System includes the laser radar system being connected with single-chip microcomputer governor circuit, and the I/O of governor circuit is to laser thunder
Reach one Laser emission enabling signal of system, control generating laser 2 and pass through acceptance division 11 before automobile
End (or the position such as rear, side) sends pulse laser, is reflected by front vehicles, controls laser and connects
Receive device 3 and receive the laser signal returned by emission part 12, calculate arteries and veins by time interval measurement module
Rush the time interval between Laser emission and echo-signal arrival, be then passed to single-chip microcomputer governor circuit, single
Sheet owner controls the distance that circuit counting goes out between front vehicles and car body, is then shown by spacing display circuit
Out, judge whether spacing is less than the threshold value pre-set, if less than the threshold value pre-set simultaneously
Words, single-chip microcomputer governor circuit can gather the speed of front vehicles simultaneously by this laser radar system, as
Really speed and relative speed (relative speed is calculated by the range-measurement system part preset in car body)
If the threshold value simultaneously greater than set, then decide that it is the situation than relatively hazardous, single-chip microcomputer can be passed through
Governor circuit controls acousto-optic warning unit and reports to the police, and one brake signal of output controls the braking system of automobile simultaneously
System starts.
By the above-mentioned course of work, laser radar system based on coaxial light path in the technical program
Can effectively realize the ranging and range rate in the pre-crashproof alarm, brake system of automobile, the thunder of pilotless automobile
Reach the function such as ranging and range rate, vehicle laser night vision radar detection, improve the safe and reliable of car steering
Property.
Last it is noted that various embodiments above is only in order to illustrate technical scheme, rather than right
It limits；Although the present invention being described in detail with reference to foregoing embodiments, this area common
Skilled artisans appreciate that the technical scheme described in foregoing embodiments still can be repaiied by it
Change, or the most some or all of technical characteristic is carried out equivalent；And these are revised or replace
Change, do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.
Claims (10)
1. a laser radar system based on coaxial light path, it is characterised in that including: an optical frames,
Generating laser and laser pickoff；
Described optical frames, including: acceptance division and emission part, described acceptance division is concentric with described emission part to be set
Putting, described acceptance division is for receiving the laser signal of described laser transmitter projects, and described emission part is used for
To described laser pickoff return laser light signal.
Laser radar system based on coaxial light path the most according to claim 1, it is characterised in that
Described optical frames includes: aspherical mirror and level crossing, and described level crossing is arranged at described aspherical mirror
Right side and be connected with described aspherical mirror, wherein, the right side of described aspherical mirror is planar structure；
Described aspherical mirror includes the acceptance division for first curvature radius and the emission part for second curvature radius, institute
State emission part around being arranged at the outside of described acceptance division and being connected with described acceptance division.
Laser radar system based on coaxial light path the most according to claim 2, it is characterised in that
Described generating laser, is arranged on the optical axis of described optical frames, for launching to described acceptance division
Laser signal；
Described laser pickoff, is arranged on the optical axis of described optical frames, for receiving through described transmitting
The laser signal that portion returns.
Laser radar system based on coaxial light path the most according to claim 3, it is characterised in that
Described generating laser is arranged in the described acceptance division focus away from described level crossing side；
Described laser pickoff is arranged in the described emission part focus away from described level crossing side.
Laser radar system based on coaxial light path the most according to claim 4, it is characterised in that
The focal length of described emission part is more than the focal length of described acceptance division.
Laser radar system based on coaxial light path the most according to claim 2, it is characterised in that
Also including: a semi-transparent semi-reflecting lens, described semi-transparent semi-reflecting lens is arranged at described generating laser and described optics
Between mirror；
Described generating laser, is arranged on the optical axis of described optical frames, for by described semi-transparent semi-reflecting
Mirror launches laser signal to described acceptance division；
Described laser pickoff, with the both sides that described generating laser is arranged at described semi-transparent semi-reflecting lens, uses
In receiving through the return of described emission part and the laser signal after described semi-transparent semi-reflecting lens reflects.
Laser radar system based on coaxial light path the most according to claim 1, it is characterised in that
The both sides of described optical frames are coated with anti-reflection film, the applicable wave band of described anti-reflection film include 905nm ± 10nm or
633nm±10nm。
8. according to the laser radar system based on coaxial light path described in any one in claim 1-7,
It is characterized in that, described acceptance division and emission part are constituted by quartz material, and wherein, circular cone coefficient c is
-2.107；Or,
Described acceptance division and emission part are constituted by H-K9I glass, and wherein, circular cone coefficient c is-2.276
Or-2.275.
9. an automobile front, it is characterised in that include in claim 1-8 described in any one
Laser radar system based on coaxial light path.
10. an automobile rearview mirror, it is characterised in that include in claim 1-8 described in any one
Laser radar system based on coaxial light path.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610371420.XA CN105891802A (en) | 2016-05-30 | 2016-05-30 | Laser radar system based on coaxial light path, automobile head lamp and automobile rearview mirror |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610371420.XA CN105891802A (en) | 2016-05-30 | 2016-05-30 | Laser radar system based on coaxial light path, automobile head lamp and automobile rearview mirror |
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|---|---|
| CN105891802A true CN105891802A (en) | 2016-08-24 |
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ID=56710373
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610371420.XA Pending CN105891802A (en) | 2016-05-30 | 2016-05-30 | Laser radar system based on coaxial light path, automobile head lamp and automobile rearview mirror |
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| CN109164431A (en) * | 2018-08-24 | 2019-01-08 | 福建海创光电有限公司 | Lidar transmit-receive coaxial optical engine structure |
| CN110596673A (en) * | 2018-06-13 | 2019-12-20 | 罗伯特·博世有限公司 | Coaxial laser radar system |
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