CN107271986A - A kind of staring imaging receiving optics for MEMS micromirror laser radar - Google Patents
A kind of staring imaging receiving optics for MEMS micromirror laser radar Download PDFInfo
- Publication number
- CN107271986A CN107271986A CN201710658908.5A CN201710658908A CN107271986A CN 107271986 A CN107271986 A CN 107271986A CN 201710658908 A CN201710658908 A CN 201710658908A CN 107271986 A CN107271986 A CN 107271986A
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- CN
- China
- Prior art keywords
- optically focused
- planoconvex spotlight
- photodetector
- laser radar
- optical
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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
- G01S7/4816—Constructional features, e.g. arrangements of optical elements of receivers alone
Abstract
The invention discloses a kind of staring imaging receiving optics for MEMS micromirror laser radar, including camera lens trim ring, optical filter, spacer ring, planoconvex spotlight, optically focused is bored, photodetector and optical tubes, wherein camera lens trim ring, optical filter, spacer ring, planoconvex spotlight, optically focused is bored, photodetector is successively set in optical tubes, optical filter, planoconvex spotlight, optically focused is bored and the optical axis of photodetector is located along the same line, filtered of light, planoconvex spotlight, optically focused cone is focused on photodetector, the side convex surface facing optical filter of the planoconvex spotlight, the side that the plane of planoconvex spotlight is bored towards optically focused, the optically focused cone is frustum cone structure, the big end of round platform is close to planoconvex spotlight, the small end of round platform is close to photodetector.Staring imaging field of view of receiver of the present invention reaches more than 30 °, and limits the interference of the bias light outside optical system field of view of receiver, improves the optical s/n ratio of laser signal reception.
Description
Technical field
It is more particularly to a kind of to be used for MEMS micromirror laser radar the present invention relates to a kind of staring imaging receiving optics
Staring imaging receiving optics.
Background technology
Scanning and synchronic distance measurement of the MEMS micromirror scanning laser radar by light beam obtain the profile information of target.By
In with small volume, it is low in energy consumption the characteristics of, MEMS micromirror scanning laser radar is in City Modeling, mapping and unmanned etc.
Field has a wide range of applications.
Unit staring imaging receiving optics simplifies the design of MEMS micromirror scanning laser radar, and improving it can be real
Existing property.Conventional big view field imaging camera lens such as fish-eye lens, wide-angle/ultra-wide angle object lens etc., can be realized super under normal conditions
More than 180 ° of imaging viewing field is crossed, but in the application of MEMS micromirror laser radar, photo-sensitive cell is not conventional CCD device,
But the avalanche photodetector part of fast-response, its photosurface is much smaller than the size of CCD target surfaces, field of view of receiver by relative aperture and
Detector photosurface is limited, on the premise of detector photosurface diameter is not more than 2mm and effective clear aperature is not less than 10mm,
It is difficult to the requirement that field of view of receiver is more than or equal to 30 °.
The content of the invention
It is an object of the invention to provide a kind of staring imaging receiving optics for MEMS micromirror laser radar,
Detector photosurface diameter is not more than 2mm and effective clear aperature not less than on the premise of 10mm, and field of view of receiver is more than or equal to
30°。
The technical solution for realizing the object of the invention is：A kind of staring imaging for MEMS micromirror laser radar is received
Optical system, including camera lens trim ring, optical filter, spacer ring, planoconvex spotlight, optically focused cone, photodetector and optical tubes, wherein mirror
Head trim ring, optical filter, spacer ring, planoconvex spotlight, optically focused cone, photodetector are successively set in optical tubes, optical filter, plano-convex
The optical axis of lens, optically focused cone and photodetector is located along the same line, and filtered of light, planoconvex spotlight, optically focused cone are focused on
Onto photodetector, the side convex surface facing optical filter of the planoconvex spotlight, what the plane of planoconvex spotlight was bored towards optically focused
Side, the optically focused cone is frustum cone structure, and the big end of round platform is close to planoconvex spotlight, and the small end of round platform is close to photodetector.
Compared with prior art, its remarkable advantage is the present invention：(1) receiving lens and light are used as present invention introduces optically focused cone
Light path relaying between electric explorer photosurface, has directly amplified the receipts light area of photodetector photosurface, has used unit
In the case that APD visits receipts device, staring imaging field of view of receiver can reach more than 30 °；(2) present invention bores optically focused big end and object lens
Last face is close to place, and significantly reduces influence of the object lens image quality to optics receiving efficiency, uses simple plano-convex
Lens are that can reach very high optics receiving efficiency as imaging receiver object lens, and the light path for significantly simplifying imaging receiver is set
Meter, makes it have small volume, debugs the simple and low outstanding advantage of cost；(3) present invention is used as reception using plano-convex singlet lens
Object lens, and the plane of planoconvex spotlight is close to placement, the numerical aperture of ingenious utilization optically focused cone, limitation with the large end face that optically focused is bored
Bias light interference outside optical system field of view of receiver, improves the optical s/n ratio of laser signal reception.
Brief description of the drawings
Fig. 1 is the structural representation of the staring imaging receiving optics of the present invention.
Fig. 2 is the optical tubes diagrammatic cross-section of the staring imaging receiving optics of the present invention.
Fig. 3 is the optically focused wimble structure schematic diagram of the staring imaging receiving optics of the present invention.
Fig. 4 simulates the hot spot distribution map of 30 degree of angles of visual field for the present invention in optical software LightTools.
Embodiment
A kind of staring imaging receiving optics for MEMS micromirror laser radar, including camera lens trim ring 1, optical filter 2,
It is spacer ring 3, planoconvex spotlight 4, optically focused cone 5, photodetector 6 and optical tubes 7, wherein camera lens trim ring 1, optical filter 2, spacer ring 3, flat
Convex lens 4, optically focused cone 5, photodetector 6 are successively set in optical tubes 7, and optical filter 2, planoconvex spotlight 4, optically focused bore 5 and
The optical axis of photodetector 6 is located along the same line, and light filtered 2, planoconvex spotlight 4, optically focused cone 5 focus on photodetection
On device 6, the side convex surface facing optical filter 2 of the planoconvex spotlight 4, the plane of planoconvex spotlight 4 bores 5 side towards optically focused,
The optically focused cone 5 is frustum cone structure, and the big end 8 of round platform is close to planoconvex spotlight 4, and the small end 9 of round platform is close to photodetector 6.
The spacer ring 3 is close to place with the convex surface of planoconvex spotlight 4.
The plane of the planoconvex spotlight 4 is close to place with the big end 8 that optically focused bores 5, the small end 9 and photoelectricity of the optically focused cone 5
The photosurface of detector 6 is close to place.
The center section of the optical tubes 7 is taper hole structure, and the size of taper hole is identical with the size that optically focused bores 5.
The optical filter 2 is 905nm narrow band pass filters.
The material of the planoconvex spotlight 4 is BK7 glass, diameter D=10mm, focal length f=15mm.
The material of the optically focused cone 5 is BK7 glass, length L=16mm, the end face diameter D at big end 81=10mm, small end 9
End face diameter D2=2mm.
The photosurface diameter D of the photodetector 63=2mm.
The present invention will be further described with implementation steps below in conjunction with the accompanying drawings.
As Figure 1-3, the staring imaging receiving optics for MEMS micromirror laser radar, by thing side to image side according to
Secondary setting camera lens trim ring 1, optical filter 2, spacer ring 3, planoconvex spotlight 4, optically focused cone 5, photodetector 6, specifically, after optical filter 2
Side set planoconvex spotlight 4, planoconvex spotlight 4 convex surface facing incident light direction, between optical filter 2 and planoconvex spotlight 4 use spacer ring 3
Separate, prevent that extruding causes device failure between optical filter 2 and planoconvex spotlight 4, the rear of planoconvex spotlight 4 sets optically focused to bore 5, optically focused
Cone 5 is platform structure, including big end 8 and small end 9, and big end 8 is close to the plane of planoconvex spotlight 4, small end 9 and photodetector 6
Photosurface be close to.Whole light path is arranged in an optical tubes 7, and the center section of optical tubes 7 is taper hole structure, taper hole
Size and optically focused bore 5 size it is identical, for placing optically focused cone 5, the two ends of optical tubes 7 are borehole structure, and light is incident
Circular hole is held to place optical filter 2 and planoconvex spotlight 4, other end circular hole places photodetector 6, and optical filter 2 and planoconvex spotlight 4 are by mirror
Head trim ring 1 fix, it is ensured that planoconvex spotlight 4, optical filter 2, optically focused cone 5 and photodetector 6 optical axis on the same line.
Because the wavelength that MEMS micromirror laser radar launches laser is 905nm, therefore optical filter 2 is using the filter of 905nm arrowbands
Mating plate, to filter out the veiling glare of other wavelength, makes the light near wavelength 905nm enter reception system.The planoconvex spotlight 4,
The material of optically focused cone 5 uses BK7 glass, the diameter D=10mm of planoconvex spotlight 4, focal length f=15mm；The length L=of optically focused cone 5
16mm, the end face diameter D at big end 81=10mm, the end face diameter D of small end 92=2mm.The photosurface of the photodetector 6 is straight
Footpath D3=2mm.
Staring imaging receiving optics to debug process as follows：
1) photodetector 6 is fixed on to the bottom of optical tubes 7, makes the photosurface center of photodetector 6 in optics
On the center line of lens barrel 7；
2) small end 9 that optically focused is bored into 5 is close to be positioned in optical tubes 7 with the photosurface of photodetector 6, optically focused cone 5
Optical axis on the center line of optical tubes 7；
3) plane of planoconvex spotlight 4 is close to be positioned in optical tubes 7 with the large end face 8 that optically focused bores 5, planoconvex spotlight 4
Optical axis on the center line of optical tubes 7；
4) convex side of spacer ring 3 and planoconvex spotlight 4 is close to and be put into optical tubes 7；
5) optical filter 2 is put into optical tubes 7, it is ensured that planoconvex spotlight 4, optical filter 2, optically focused cone 5 and photodetector 6
Optical axis on the same line；
6) the gap encapsulating in optical tubes 7 is reinforced, then fixed lens trim ring 1.
With the staring imaging receiving optics of LightTools software analog MEMS micro mirror laser radars, obtain 30 degree and regard
Illumination Distribution figure on rink corner photodetector 6, as shown in figure 4, spot energy distribution is concentrated, center brightness is high, although, light
The photosurface center of photodetector 6 is deviateed in spot center, but spot center position is still in the photosurface of photodetector 6
On, it still is able to cause the fast-response of photodetector 6, it is achieved that field of view of receiver is more than or equal to 30 ° of detection demand.
Claims (8)
1. a kind of staring imaging receiving optics for MEMS micromirror laser radar, it is characterised in that including camera lens trim ring
(1), optical filter (2), spacer ring (3), planoconvex spotlight (4), optically focused cone (5), photodetector (6) and optical tubes (7), wherein mirror
Head trim ring (1), optical filter (2), spacer ring (3), planoconvex spotlight (4), optically focused cone (5), photodetector (6) are successively set on optics
In lens barrel (7), optical filter (2), planoconvex spotlight (4), optically focused bore (5) and the optical axis of photodetector (6) is located along the same line,
Filtered of light (2), planoconvex spotlight (4), optically focused cone (5) are focused on photodetector (6), the planoconvex spotlight (4)
Convex surface facing the side of optical filter (2), the plane of planoconvex spotlight (4) bores the side of (5) towards optically focused, and the optically focused cone (5) is
Frustum cone structure, the big end (8) of round platform is close to planoconvex spotlight (4), and the small end (9) of round platform is close to photodetector (6).
2. the staring imaging receiving optics for MEMS micromirror laser radar according to claims 1, its feature
It is, the spacer ring (3) is close to place with the convex surface of planoconvex spotlight (4).
3. the staring imaging receiving optics for MEMS micromirror laser radar according to claims 1, its feature
It is, the plane of the planoconvex spotlight (4) is close to place with the big end (8) that optically focused bores (5), the small end (9) of the optically focused cone (5)
It is close to place with the photosurface of photodetector (6).
4. the staring imaging receiving optics for MEMS micromirror laser radar according to claims 1, its feature
It is, the center section of the optical tubes (7) is taper hole structure, and the size of taper hole is identical with the size that optically focused bores 5.
5. a kind of staring imaging receiving optics for MEMS micromirror laser radar according to claims 1, its
It is characterised by, the optical filter (2) is 905nm narrow band pass filters.
6. a kind of staring imaging receiving optics for MEMS micromirror laser radar according to claims 1, its
It is characterised by, the material of the planoconvex spotlight (4) is BK7 glass, diameter D=10mm, focal length f=15mm.
7. a kind of staring imaging receiving optics for MEMS micromirror laser radar according to claims 1, its
It is characterised by, the material of the optically focused cone (5) is BK7 glass, length L=16mm, the end face diameter D of big end (8)1=10mm,
The end face diameter D of small end (9)2=2mm.
8. a kind of staring imaging receiving optics for MEMS micromirror laser radar according to claims 1, its
It is characterised by, the photosurface diameter D of the photodetector (6)3=2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710658908.5A CN107271986A (en) | 2017-08-04 | 2017-08-04 | A kind of staring imaging receiving optics for MEMS micromirror laser radar |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710658908.5A CN107271986A (en) | 2017-08-04 | 2017-08-04 | A kind of staring imaging receiving optics for MEMS micromirror laser radar |
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| CN107271986A true CN107271986A (en) | 2017-10-20 |
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| CN201710658908.5A Pending CN107271986A (en) | 2017-08-04 | 2017-08-04 | A kind of staring imaging receiving optics for MEMS micromirror laser radar |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108169847A (en) * | 2018-03-13 | 2018-06-15 | 杭州艾芯智能科技有限公司 | A kind of large field of view scan imaging optical system |
| CN110456327A (en) * | 2018-05-08 | 2019-11-15 | 探维科技(北京)有限公司 | Laser radar reception device and laser radar system |
| CN113126106A (en) * | 2019-12-31 | 2021-07-16 | 北醒（北京）光子科技有限公司 | Laser radar |
| CN114325640A (en) * | 2021-11-18 | 2022-04-12 | 杭州宏景智驾科技有限公司 | Laser radar receiving device and laser radar |
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| JP3536940B2 (en) * | 1994-10-17 | 2004-06-14 | 富士写真光機株式会社 | Collimator lens |
| CN105277931A (en) * | 2014-07-21 | 2016-01-27 | 北京自动化控制设备研究所 | Multi-beam collimation emission and receiving system for laser radar and lens thereof |
| CN106154248A (en) * | 2016-09-13 | 2016-11-23 | 深圳市佶达德科技有限公司 | A kind of laser radar optical receiver assembly and laser radar range method |
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2017
- 2017-08-04 CN CN201710658908.5A patent/CN107271986A/en active Pending
Patent Citations (3)
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| JP3536940B2 (en) * | 1994-10-17 | 2004-06-14 | 富士写真光機株式会社 | Collimator lens |
| CN105277931A (en) * | 2014-07-21 | 2016-01-27 | 北京自动化控制设备研究所 | Multi-beam collimation emission and receiving system for laser radar and lens thereof |
| CN106154248A (en) * | 2016-09-13 | 2016-11-23 | 深圳市佶达德科技有限公司 | A kind of laser radar optical receiver assembly and laser radar range method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108169847A (en) * | 2018-03-13 | 2018-06-15 | 杭州艾芯智能科技有限公司 | A kind of large field of view scan imaging optical system |
| CN110456327A (en) * | 2018-05-08 | 2019-11-15 | 探维科技(北京)有限公司 | Laser radar reception device and laser radar system |
| CN113126106A (en) * | 2019-12-31 | 2021-07-16 | 北醒（北京）光子科技有限公司 | Laser radar |
| CN114325640A (en) * | 2021-11-18 | 2022-04-12 | 杭州宏景智驾科技有限公司 | Laser radar receiving device and laser radar |
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Application publication date: 20171020 |
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