CN107561716A - A kind of common aperture arrangement of annular compound lens miniaturization laser transmitting-receiving - Google Patents
A kind of common aperture arrangement of annular compound lens miniaturization laser transmitting-receiving Download PDFInfo
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- CN107561716A CN107561716A CN201710762720.5A CN201710762720A CN107561716A CN 107561716 A CN107561716 A CN 107561716A CN 201710762720 A CN201710762720 A CN 201710762720A CN 107561716 A CN107561716 A CN 107561716A
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Abstract
The invention discloses a kind of annular compound lens miniaturization laser transmitting-receiving aperture arrangement, including fixing shell, annular compound lens, detection system module altogether；The front end that the annular compound lens are fixed in fixing shell, the rear end that detection system module is fixed in fixing shell；The annular compound lens are provided with round boss at the convex surface center of existing convex lens, and boss front end face is rounded convex, the plane of reflection angle of the convex shape lens face that formation is made up of receiving lens portion and diversing lens portion, the axial direction of the annular compound lens and the speculum of detection system is 45 degree；Between laser emitting module, launch driving circuit, control circuit and housing uses electromagnetic armouring structure；Aperture arrangement uses annular compound Lens Design to the laser transmitting-receiving of the present invention altogether, realizes laser transmitting-receiving aperture arrangement miniaturization, modularization, reliability and low cost altogether.
Description
Technical field
The invention belongs to technical field of laser detection, particularly a kind of common aperture of annular compound lens miniaturization laser transmitting-receiving
Device.
Background technology
Laser ranging technique can be applied to the fields such as civilian and scientific research, have high range accuracy, be at present using most
For one of extensive ranging means.Conventional laser range unit divides aperture mode using transmitting-receiving, that is, launches light path and receiving light path
Split.For receiving and dispatching camera lens, it is ensured that effective clear aperature, improve transmitting-receiving efficiency, but Laser Distance Measuring Equipment can be caused
Volume is excessive, can not meet the application under some volume limited situations；And optical axis separation can cause range-measurement system signal to noise ratio low, and
Higher is required to finding range, larger difficulty be present near field and far field ranging.
Aperture mode is a kind of new side proposed for many drawbacks existing for solution transmitting-receiving point aperture mode altogether for transmitting-receiving
Method.The transmitting optical axis and reception optical axis of which are located in same aperture, and light beam separation need to be carried out by a spectroscope, and
Transmitting light beam and reception light beam share same optical shaping lens.
United States Patent (USP) US 20100321669, using single lens structure：, on the one hand can not be right using single focal length lenses
Transmitting-receiving light path is focused respectively and shaping, and on the other hand, the common focal status of transmitting-receiving can make system draw ratio and be restricted.
Also some devices be avoid caused by single lens can not respectively to transmitting-receiving beam shaping the problem of, in laser
Extra pre-shaped lens are added between light source and single focal length lenses integer is carried out to outgoing beam.Chinese Patent Application No.
201610828345, the second lens (i.e. pre-shaped mirror for diverging light to be gathered is provided between light beam source and light splitting piece
Piece).The introducing of pre-shaped eyeglass, more axial spaces are necessarily required to, device length can be caused long.
The presence of above mentioned problem make it that aperture arrangement can not meet in the case where volume is limited occasion altogether for conventional laser transmitting-receiving, such as small
The requirement of type laser range finder.
The content of the invention
Technical problem solved by the invention is to provide a kind of annular compound lens miniaturization laser transmitting-receiving aperture dress altogether
Put, to solve existing laser transmitting-receiving, aperture arrangement volume is larger altogether, can not meet the requirement in the case where volume is limited occasion.
The technical solution for realizing the object of the invention is：
A kind of annular compound lens miniaturization laser transmitting-receiving aperture arrangement, including fixing shell, annular compound lens, spy altogether
Examining system module；The front end that the annular compound lens are fixed in fixing shell, detection system module are fixed on fixing shell
Interior rear end；
The annular compound lens are provided with round boss at the convex surface center of existing convex mirror, and boss front end face is circle
Convex surface, form the convex shape lens face being made up of receiving lens outer shroud and emission center lens, the axle of the annular compound lens
It it is 45 degree to the plane of reflection angle of the speculum with detection system.
The present invention compared with prior art, its remarkable advantage：
(1) annular compound Lens Design is used, can effectively break through the major diameter size limit of the common aperture arrangement of conventional laser transmitting-receiving
System, and the more optics microscope groups of tradition can be avoided to the high request of assembly precision, realize laser transmitting-receiving altogether aperture arrangement miniaturization with
Modularization, it ensure that the optical accuracy of the common aperture arrangement of laser transmitting-receiving.
(2) designed using electromagnetic armouring structure and embedding, severe working environment and inside and outside electromagnetic interference can be resisted；
(3) aperture arrangement is simple in construction altogether for annular compound lens of the invention miniaturization laser transmitting-receiving, and reliability is high, cost
It is low, there is versatility.
The present invention is described in further detail below in conjunction with the accompanying drawings.
Brief description of the drawings
Fig. 1 is a kind of annular compound lens miniaturization laser transmitting-receiving of present invention aperture arrangement section of structure altogether.
Fig. 2 is the structural profile illustration of annular compound lens.
Fig. 3 is a kind of annular compound lens miniaturization laser transmitting-receiving of present invention aperture arrangement ranging light path principle figure altogether.
Fig. 4 is the Split type structure diagrammatic cross-section of annular compound lens.
Embodiment
In order to illustrate technical scheme and technical purpose, below in conjunction with the accompanying drawings and specific embodiment is done to the present invention
It is further to introduce.
With reference to Fig. 1, a kind of annular compound lens of the invention miniaturization laser transmitting-receiving aperture arrangement, including fixing shell altogether
1st, annular compound lens 2, detection system module 3；The front end that the annular compound lens 2 are fixed in fixing shell 1, detection system
The rear end that system module 3 is fixed in fixing shell 1；
With reference to Fig. 2, the annular compound lens 2 are provided with round boss at the convex surface center of existing convex lens, and convex
Platform front end face is rounded convex, forms the convex shape lens face being made up of receiving lens portion 2B and diversing lens portion 2A, the annular
The plane of reflection angle of the axial direction of compound lens 2 and the speculum 32 of detection system is 45 degree；
With reference to Fig. 3, the action principle of annular compound lens 2 is：Diversing lens portion 2A carries out whole to Laser emission light beam 40
Type is outgoing beam 41 with collimation, and receiving lens portion 2B is focused to the incident beam 43 returned from target to focus on incident light
Beam 42, and the light path of focusing incident beam 42 is turned back by speculum 32 and converge to reception sensor assembly 34.
By controlling the distance between annular compound lens 2 and detection system module 3, you can adjust annular compound lens 2
Focal position, diversing lens portion 2A focus can be adjusted to laser emitting module in the case of it mismachining tolerance be present during assembling
35 light out part.
Further, annular boss is provided with the fixing shell 1, the installation site of annular compound lens 2 is limited
Position；The front end of the annular compound lens 2 is fixed in the interior forward end of fixing shell 1 by pressure ring 21, annular compound lens 2
Rear end is provided with ring washer 23, and annular compound lens 2 are shielded ring washer and protective effect, avoids installation process pressure
Bad annular compound lens 2 and the impact using process.
Further, the detection system module 3 includes housing 31, speculum 32, receives sensor assembly 34, laser hair
Penetrate module 35, control system；
The speculum 32 is fixed on the front end of laser emitting module 35, for the laser for focusing on annular compound lens 2
Signal reflex to receive sensor assembly 34；And speculum 32 is provided with circular hole, launch laser for laser emitting module 35
Passage；The reception sensor assembly 34 is fixed in the groove outside housing 31, is received sensor assembly 34 and is used to receive instead
Penetrate the laser signal that mirror 32 reflects back；The reception sensor assembly 34, laser emitting module 35, control system are sequentially located at
Inside housing 31；The reception sensor assembly 34, laser emitting module 35 are connected with control system, and control system is used to divide
The reception and transmitting of sensor assembly 34, laser emitting module 35 Kong Zhi not be received, while can be by emission parameter and reception signal
Integrated and pre-processed and sent, transfer to external signal processing system to carry out final process.
Further, the control system includes launch driving circuit 37, control circuit 39, and the drive circuit 37 is distinguished
It is connected with laser emitting module 35 and control circuit 39, and control circuit 39 is connected with receiving sensor assembly 34；The present invention will
The launch driving circuit 37 and control circuit 39 of control system are separated, and the road that will be discharged before sensor is integrated into pretreatment circuit to be connect
Sensor assembly 34 is received, can effectively reduce the size of control board, further to reduce whole laser transmitting-receiving aperture dress altogether
The volume put.
Further, the laser emitting module 35, launch driving circuit 37, control circuit 39 are arranged at housing 31
It is interior；Housing 31 is arranged on inside fixing shell 1, and housing 31, can be to device inside using the alloy material with magnetic screen function
Caused electromagnetic interference is shielded, and prevents internal interference signals leakage contribution external equipment, while can be to external electromagnetic interference
Shielded, prevent external interference signals from invading, influence the normal work of internal circuit.
Preferably, housing 31 and fixing shell 1 are demountable structure, and the outside of fixing shell 1 is provided with bonnet 24, fixing shell
1 is connected through a screw thread with bonnet 24, is easy to dismount the housing 31 in fixing shell 1；And the use of bonnet 311 has magnetic cup
Cover the alloy material of function.
Between the laser emitting module 35 and launch driving circuit 37, launch driving circuit 37 and control circuit 39 it
Between, be equipped between control circuit 39 and bonnet 24 and isolate pressure ring 36, isolation pressure ring 36 using the material with magnetic screen function,
So that laser emitting module 35, the launch driving circuit 37 that can produce high-frequency and high-voltage electromagnetic interference signal, control circuit 39 to be isolated
Open, effectively to isolate the different circuits in the inside of housing 31 and electromagnetic crosstalk caused by intermodule.
The magnetic shielding material uses permalloy.
Further, the laser emitting module 35 and launch driving circuit 37, control circuit 39 and control circuit 39 it
Between be filled with potting compound, space where circuit board is filled, prevents external impact from causing to damage to internal circuit；
Further, the cavity between the annular compound lens 2 and laser emitting module 35 is vacuumized or is filled with and be lazy
Property gas, with prevent inside from going mouldy and temperature change caused by lens surface haze phenomenon.
With reference to Fig. 4, further, the annular compound lens 2 can also be Split type structure, by processing cylinder respectively
The emission center lens 21A and receiving lens ring 21B of annular, and emission center lens 21A is fixed on reception thoroughly using black glue
It is made in mirror ring 21B centre bores, can effectively prevents that Laser emission light beam 40 is saturating to receiving in veiling glare crosstalk caused by lens interior
Mirror ring 21B, influence the normal work of reception system.
Embodiment 1.
A kind of common aperture arrangement of annular compound lens miniaturization laser transmitting-receiving, is such as applied to miniature laser in the present embodiment
Range finder, due to by mini laser rangefinder volumetric constraint, device is an a diameter of Φ 25mm, high 45mm cylinder.
The annular compound lens 2 use Split type structure, by processing cylindrical center diversing lens 21A and annular respectively
Receiving lens ring 21B, and by emission center lens 21A using black glue be fixed in receiving lens ring 21B holes be made, prevent from sending out
Irradiating light beam influences the normal work of reception system in veiling glare crosstalk caused by lens interior to receiving lens ring 21B.
The emission center lens 21A diameter designs are 10mm, and receiving lens ring 21B diameter designs are 18mm, then launch
Distinguish 78.5mm with effective clear aperature area of reception2And 175.84mm2.Emission center lens 21A effective focal lengths are designed as
19mm；To make full use of the sensor photosurface area for receiving sensor assembly 34, receiving lens ring 21B effective focal lengths are designed as
25mm, the hot spot of focusing incident beam 42 can be made to cover sensor photosurface just.
By controlling the distance between annular compound lens 2 and detection system module 3, Jiao of annular compound lens 2 is adjusted
At point position to the laser emission point of laser emitting module 35.
After the completion of assembling, black glue potting compound is filled by the cable hole of bonnet 24 laser emitting module 35 and transmitting are driven
Dynamic circuit 37, control circuit 39 are filled with the place space of control circuit 39, prevent external impact from causing to damage to internal circuit
It is bad；Nitrogen is filled to the cavity between the annular compound lens 2 and laser emitting module 35, to prevent inside from going mouldy and temperature
Lens surface caused by change hazes phenomenon.
The device course of work is as follows：
1st, control circuit 39 controls launch driving circuit 37 to drive laser emitting module 35, and Laser emission light beam 40 is by laser
The laser diode of transmitter module 35 is sent, and is gone out luminous point and is located at emission center lens 22A focal points；
2nd, Laser emission light beam 40 is saturating through emission center through the speculum 32 and the middle through-hole of mirror unit 33
Mirror 22A collimations are parallel outgoing beam 41；
3rd, the incident beam 43 being reflected back by target is focused to focus on incident beam 42 by receiving lens ring 22B, passes through
The speculum 32 will focus on incident beam 42 and turn back to the sensor photosurface for receiving sensor assembly 34；
4th, receive sensor assembly 34 and the signal received is reached into control circuit 39, and will be launched by control circuit 39 and joined
Number is integrated and pre-processed and spread out of to mini laser rangefinder rear signal processing system, solving target institute with reception signal
Locate distance.
Claims (9)
1. a kind of common aperture arrangement of annular compound lens miniaturization laser transmitting-receiving, it is characterised in that including fixing shell (1), ring
Shape compound lens (2), detection system module (3)；The front end that the annular compound lens (2) are fixed in fixing shell (1), visit
The rear end that examining system module (3) is fixed in fixing shell (1)；
The annular compound lens (2) are provided with round boss at the convex surface center of existing convex lens, and boss front end face is
Rounded convex, forms the convex shape lens face being made up of receiving lens portion (2B) and diversing lens portion (2A), and the annular compound is saturating
The plane of reflection angle of the axial direction of mirror (2) and the speculum (32) of detection system is 45 degree.
A kind of 2. common aperture arrangement of annular compound lens miniaturization laser transmitting-receiving as claimed in claim 1, it is characterised in that institute
The front end for stating annular compound lens (2) is fixed in the interior forward end of fixing shell (1), annular compound lens by pressure ring (21)
(2) rear end is provided with ring washer (23).
A kind of 3. common aperture arrangement of annular compound lens miniaturization laser transmitting-receiving as claimed in claim 1, it is characterised in that institute
State detection system module (3) include housing (31), speculum (32), receive sensor assembly (34), laser emitting module (35),
Control system；
The speculum (32) is fixed on the front end of laser emitting module (35), and speculum (32) is provided with circular hole；It is described to connect
Receive sensor assembly (34) to be fixed in the outside groove of housing (31), receive sensor assembly (34) and be used to receive through speculum
(32) the focusing incident beam (42) after turning back；The reception sensor assembly (34), laser emitting module (35), control system
It is internal to be sequentially located at housing (31)；The reception sensor assembly (34), laser emitting module (35) are connected with control system,
Control system is used for the reception and transmitting that control respectively receives sensor assembly (34), laser emitting module (35), while can incite somebody to action
Emission parameter is integrated and pre-processed with reception signal and sent.
A kind of 4. common aperture arrangement of annular compound lens miniaturization laser transmitting-receiving as claimed in claim 3, it is characterised in that institute
State control system include launch driving circuit (37), control circuit (39), the drive circuit (37) respectively with Laser emission mould
Block (35) is connected with control circuit (39), and control circuit (39) is connected with receiving sensor assembly (34).
A kind of 5. common aperture arrangement of annular compound lens miniaturization laser transmitting-receiving as claimed in claim 4, it is characterised in that institute
Laser emitting module (35), launch driving circuit (37), control circuit (39) is stated to be arranged in housing (31)；The housing
(31) fixing shell (1) inside is arranged on, and housing (31) is using the alloy material with magnetic screen function.
A kind of 6. common aperture arrangement of annular compound lens miniaturization laser transmitting-receiving as claimed in claim 5, it is characterised in that institute
State between laser emitting module (35) and launch driving circuit (37), be equal between launch driving circuit (37) and control circuit (39)
Provided with isolation pressure ring (36), and isolate pressure ring (36) using the material with magnetic screen function.
A kind of 7. common aperture arrangement of annular compound lens miniaturization laser transmitting-receiving as claimed in claim 6, it is characterised in that institute
State between laser emitting module (35) and launch driving circuit (37), control circuit (39) and control circuit (39) filled with filling
Envelope material.
A kind of 8. common aperture arrangement of annular compound lens miniaturization laser transmitting-receiving as claimed in claim 1, it is characterised in that institute
The cavity stated between annular compound lens (2) and laser emitting module (35) vacuumizes or is filled with inert gas.
A kind of 9. common aperture arrangement of annular compound lens miniaturization laser transmitting-receiving as claimed in claim 1, it is characterised in that institute
It is Split type structure to state annular compound lens (2), including the diversing lens (21A) at center and the receiving lens ring (21B) of annular, in
Heart diversing lens (21A) are fixed on by black glue in receiving lens ring (21B) centre bore.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710762720.5A CN107561716A (en) | 2017-08-30 | 2017-08-30 | A kind of common aperture arrangement of annular compound lens miniaturization laser transmitting-receiving |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710762720.5A CN107561716A (en) | 2017-08-30 | 2017-08-30 | A kind of common aperture arrangement of annular compound lens miniaturization laser transmitting-receiving |
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| CN107561716A true CN107561716A (en) | 2018-01-09 |
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| CN201710762720.5A Pending CN107561716A (en) | 2017-08-30 | 2017-08-30 | A kind of common aperture arrangement of annular compound lens miniaturization laser transmitting-receiving |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108574533A (en) * | 2018-03-09 | 2018-09-25 | 长春理工大学 | A kind of Shared aperture laser communication optical transmitter and receiver based on optical phased array |
| CN111220995A (en) * | 2019-12-31 | 2020-06-02 | 南京理工大学 | Miniaturized receiving and transmitting common-aperture pulse laser detection device |
| WO2020142919A1 (en) * | 2019-01-09 | 2020-07-16 | 深圳市大疆创新科技有限公司 | Ranging device and mobile platform |
| WO2021142997A1 (en) * | 2020-01-15 | 2021-07-22 | 深圳玩智商科技有限公司 | Receiving lens, tof coaxial radar laser receive-emit system structure and product |
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| CN101452076A (en) * | 2008-12-30 | 2009-06-10 | 中国科学院安徽光学精密机械研究所 | Optical-mechanical system of semiconductor laser cloud height automatic measuring instrument |
| CN107102312A (en) * | 2017-06-06 | 2017-08-29 | 四川经曼光电科技有限公司 | Laser scanning measurement instrument |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001183444A (en) * | 1999-12-27 | 2001-07-06 | Minolta Co Ltd | Range finder |
| CN1967285A (en) * | 2006-09-14 | 2007-05-23 | 中国科学院安徽光学精密机械研究所 | Laser radar transmission type confocal distance light receiving and emitting optical system |
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| CN107102312A (en) * | 2017-06-06 | 2017-08-29 | 四川经曼光电科技有限公司 | Laser scanning measurement instrument |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108574533A (en) * | 2018-03-09 | 2018-09-25 | 长春理工大学 | A kind of Shared aperture laser communication optical transmitter and receiver based on optical phased array |
| WO2020142919A1 (en) * | 2019-01-09 | 2020-07-16 | 深圳市大疆创新科技有限公司 | Ranging device and mobile platform |
| CN111670375A (en) * | 2019-01-09 | 2020-09-15 | 深圳市大疆创新科技有限公司 | Distance measuring device and mobile platform |
| CN111220995A (en) * | 2019-12-31 | 2020-06-02 | 南京理工大学 | Miniaturized receiving and transmitting common-aperture pulse laser detection device |
| WO2021142997A1 (en) * | 2020-01-15 | 2021-07-22 | 深圳玩智商科技有限公司 | Receiving lens, tof coaxial radar laser receive-emit system structure and product |
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Application publication date: 20180109 |