CN109459739A - Stray light cancellation element - Google Patents
Stray light cancellation element Download PDFInfo
- Publication number
- CN109459739A CN109459739A CN201811376182.7A CN201811376182A CN109459739A CN 109459739 A CN109459739 A CN 109459739A CN 201811376182 A CN201811376182 A CN 201811376182A CN 109459739 A CN109459739 A CN 109459739A
- Authority
- CN
- China
- Prior art keywords
- delustring
- stray light
- barrel
- lens
- diaphragm
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000003287 optical effect Effects 0.000 claims abstract description 16
- 229910003460 diamond Inorganic materials 0.000 claims description 10
- 239000010432 diamond Substances 0.000 claims description 10
- 230000003647 oxidation Effects 0.000 claims description 6
- 238000007254 oxidation reaction Methods 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 241000826860 Trapezium Species 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000001795 light effect Effects 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 201000009310 astigmatism Diseases 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 208000007578 phototoxic dermatitis Diseases 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000011514 reflex Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- 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
- G01S7/4804—Auxiliary means for detecting or identifying lidar signals or the like, e.g. laser illuminators
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Optics & Photonics (AREA)
- Light Receiving Elements (AREA)
Abstract
This application involves a kind of stray light cancellation elements, it include: delustring cavity, the receiving lens for being mounted on the delustring inside cavity, the receiving element for being mounted on the delustring containment portion, described device further includes the delustring diaphragm and delustring barrel for being set to the delustring inside cavity；The receiving lens, the receiving element and the delustring barrel are located in same optical axis；The delustring diaphragm is located at the focus area of the receiving lens, and the delustring diaphragm is provided with light hole at the axial location；The delustring barrel is located among the delustring diaphragm and the receiving element.Stray light cancellation element provided by the present application can make the eradicating efficacy of stray light more preferable, and the signal beams received are more high-quality.
Description
Technical field
The present invention relates to field of radar more particularly to a kind of stray light cancellation elements.
Background technique
Currently, the receiving sensor part that laser radar uses mostly is sensitiveer, receiving sensor part sensitivity is higher, then
It is better to receive target object reflection signal.But the senser element that sensitivity is higher, it is wanted to what the stray light of reception device was eliminated
Ask higher.
The method that tradition eliminates stray light is to carry out the black processing of anodic oxidation on chamber cylinder surface, and this method can only be eliminated few
Partial stray light, effect are poor.
Summary of the invention
Based on this, it is necessary to provide a kind of stray light cancellation element, regarding to the issue above to weaken stray light to laser thunder
Up to the influence for receiving signal, improving laser radar receives the signal reception of system.
A kind of stray light cancellation element, comprising: delustring cavity, the receiving lens for being mounted on the delustring inside cavity, peace
Mounted in the receiving element of the delustring containment portion, described device further includes the delustring diaphragm for being set to the delustring inside cavity
With delustring barrel；The receiving lens, the receiving element and the delustring barrel are located in same optical axis；
The delustring diaphragm is located at the focus area of the receiving lens, and the delustring diaphragm is set at the axial location
It is equipped with light hole；
The delustring barrel is located among the delustring diaphragm and the receiving element.
A kind of stray light cancellation element provided by the above embodiment includes delustring cavity, is mounted on the delustring inside cavity
Receiving lens, be mounted on the receiving element of the delustring containment portion, described device further includes being set to the delustring cavity
Internal delustring diaphragm and delustring barrel；The receiving lens, the receiving element and the delustring barrel are located at same optical axis
On；The delustring diaphragm is located at the focus area of the receiving lens, and the delustring diaphragm is provided at the axial location
Light hole；The delustring barrel is located among the delustring diaphragm and the receiving element.Signal beams are dissipated by receiving lens
It is incident upon delustring diaphragm, light hole is then passed through and scatters to delustring barrel, signal beams first pass around delustring cavity and are once eliminated,
A part of stray light is reflected by delustring diaphragm again, most exports residual stray light through delustring barrel afterwards；Dress through this embodiment
It sets, so that the eradicating efficacy of stray light is more preferable, the signal beams received are more high-quality.
In one embodiment, the one side of the delustring diaphragm towards the receiving lens is diamond structure.
In one embodiment, the surface angle of diamond structure is 90 °.
In above-described embodiment, the one side by delustring diaphragm towards receiving lens is to be set as diamond structure and diamond structure
Surface angle is 90 °, and the light beam at the field of view of receiver angle that divergence of beam angle can be greater than to reception camera lens reflexes in delustring cavity
It absorbs, and then eliminates a part of biggish stray light in divergence of beam angle.
In one embodiment, multiple polygonal through hole are offered on the delustring barrel.
In one embodiment, the polygonal through hole is trapezium structure.
In one embodiment, for the polygonal through hole closer to optical axis, the bore of the polygonal through hole is bigger.
In the present embodiment, delustring barrel is the trapezoidal shape symmetrical above and below as middle line using optical axis, and is opened up on delustring barrel
There are multiple polygonal through hole, the bore closer to optical axis polygonal through hole is bigger；Delustring barrel has according to its architectural characteristic leads
Out-of-order light export delustring barrel is absorbed into delustring cavity, and then eliminates remaining a part of stray light by photosensitiveness, so that connecing
The signal beams received are more high-quality.
In one embodiment, the aperture of the delustring barrel is greater than the outer diameter of the receiving element.
In one embodiment, the outer diameter difference of the aperture of the delustring barrel and the receiving element is less than default threshold
Value.
In the present embodiment, the aperture of delustring barrel is greater than the outer diameter of the receiving element, so that derived stray light is all
It scatters in delustring cavity, if the aperture of delustring barrel is less than the outer diameter of the receiving element, will lead to stray light importing and connect
By element.
In one embodiment, the delustring cavity inner surface is black treated the surface of anodic oxidation.
In one embodiment, the receiving lens be plano-convex lens, biconvex lens, spherical lens, non-spherical lens, from
By any one in toroidal lens and lens group.
In the present embodiment, delustring cavity inner surface is black treated the surface of anodic oxidation, can be according to its material spy
Property absorb stray light.
Stray light cancellation element provided by the invention includes delustring cavity, the reception for being mounted on the delustring inside cavity
Lens, the receiving element for being mounted on the delustring containment portion, described device further include being set to the delustring inside cavity
Delustring diaphragm and delustring barrel；The receiving lens, the receiving element and the delustring barrel are located in same optical axis；It is described
Delustring diaphragm is located at the focus area of the receiving lens, and the delustring diaphragm is provided with light hole at the axial location；
The delustring barrel is located among the delustring diaphragm and the receiving element.In the present embodiment, signal beams pass through reception
Lens scatter is then passed through light hole and scatters to delustring barrel to delustring diaphragm；Signal beams first pass around delustring cavity and carry out one
Secondary elimination, then a part of stray light is reflected by delustring diaphragm, most residual stray light is exported through delustring barrel afterwards；By this implementation
The device of example, so that the eradicating efficacy of stray light is more preferable, the signal beams received are more high-quality.
Detailed description of the invention
Fig. 1 is a kind of stray light cancellation element schematic diagram provided by the embodiments of the present application；
Fig. 2 is a kind of stray light cancellation element operation schematic diagram provided by the embodiments of the present application；
Fig. 3 is a kind of delustring barrel sectional view provided by the embodiments of the present application.
Description of symbols:
1: delustring cavity；
2: receiving lens；
3: receiving element；
4: delustring diaphragm；
5: delustring barrel；
41: light hole；
51: polygonal through hole.
Specific embodiment
It is right with reference to the accompanying drawings and embodiments in order to which the objects, technical solutions and advantages of the application are more clearly understood
The application is further elaborated.It should be appreciated that specific embodiment described herein is only to explain the application, not
For limiting the application.
Fig. 1 is a kind of stray light cancellation element schematic diagram provided by the embodiments of the present application, as shown in Figure 1, the stray light disappears
Except device includes: delustring cavity 1, the receiving lens 2 for being mounted on the delustring inside cavity, is mounted on the delustring containment portion
Receiving element 3, described device further includes the delustring diaphragm 4 and delustring barrel 5 for being set to the delustring inside cavity；It is described to connect
Lens 2, the receiving element 3 and the delustring barrel 5 is received to be located in same optical axis；The delustring diaphragm 4 is located at the reception
The focus area of lens 2, the delustring diaphragm 4 are provided with light hole 41 at the axial location；The delustring barrel 5 is located at
Among the delustring diaphragm 4 and the receiving element 3.
Wherein, delustring cavity 1 is mounted on delustring cavity 1 for absorbing stray light and fixed reception lens 2, receiving lens 2
Front end, for assemble light effect；Optionally, receiving lens 2 can be biconvex lens, plano-convex lens or concave-convex lens,
The present embodiment is with no restrictions.Receiving element 3 is mounted on outside delustring cavity 1, the focal length rear of receiving lens 2；Receiving element 3 is
Sensitive photoelectric sensor components can be photoelectric tube, photo resistance, photodiode or phototriode, the present embodiment
With no restrictions.Delustring diaphragm 4 and delustring barrel 5 are installed in delustring cavity 1, and delustring diaphragm 4 is located at the focus of receiving lens 2
Region, delustring diaphragm 4 are provided with light hole 41 at axial location；Delustring diaphragm 4 does not limit the signal beams in optical system,
And only to the part restriction effect from stray light of the luminous energy and camera lens internal reflection and scattering injected outside visual field etc..Delustring barrel
5 are located among the delustring diaphragm 4 and the receiving element 3；Receiving lens 2, receiving element 3 and delustring barrel 5 are located at same
On optical axis.
Fig. 2 is a kind of stray light cancellation element operation schematic diagram, has included effective information into the light beam for receiving camera lens 2
Light beam and stray light light beam；Stray light light beam includes that divergence of beam angle is greater than the light beam for receiving the field of view of receiver angle of camera lens 2,
Without obvious directionality, out-of-order light.As shown in Fig. 2, signal beams, which pass through, receives camera lens 2, into delustring chamber
In body 1, and the focus area of receiving lens 2 is converged at, i.e. 41 region of light hole of delustring diaphragm 4, in the process, delustring chamber
Body 1 absorbs a part of stray light, and the light beam at the field of view of receiver angle that divergence of beam angle is greater than reception camera lens 2 by delustring diaphragm 4 is anti-
It is incident upon delustring cavity 1, so that eliminating divergence of beam angle is greater than the stray light for receiving the field of view of receiver angle of camera lens 2；Signal beams
Enter delustring barrel 5 across light hole 41, delustring barrel 5 exports out-of-order light beam into delustring cavity 1, and then to random ordering
Stray light is eliminated, and is finally obtained good signal beams and is sent to receiving element 3.
Stray light cancellation element in above-described embodiment, signal beams scatter to delustring diaphragm by receiving lens 2, then wear
It crosses light hole 41 and scatters to delustring barrel 5；Signal beams first pass around delustring cavity 1 and are once eliminated, then pass through delustring light
4 a part of stray light of reflection of door screen, most exports residual stray light through delustring barrel 5 afterwards and connects so that the eradicating efficacy of stray light is more preferable
It is more high-quality to receive the signal beams that element 3 receives.
In one embodiment, the one side of the delustring diaphragm 4 towards the receiving lens 2 is diamond structure；Optionally,
The surface angle of diamond structure is 90 °.
In the present embodiment, the one side of delustring diaphragm 4 towards the receiving lens 2 is diamond structure；And diamond structure
Surface angle is 90 °, can be to the stray light of the light beam and camera lens internal reflection injected outside field angle according to its structure feature
Etc. providing constraints, reflexed in delustring cavity for example, divergence of beam angle is greater than and receives the light beam at the field of view of receiver angle of camera lens
It absorbs, to eliminate a part of stray light.
Fig. 3 is a kind of delustring barrel sectional view provided by the embodiments of the present application, optionally, in one embodiment, described
Multiple polygonal through hole 51 are offered on delustring barrel 5；The polygonal through hole 51 is trapezium structure；The polygonal through hole 51
Closer to optical axis, the bore of the polygonal through hole 51 is bigger.
In the above-described embodiments, delustring barrel 5 is cylindrical shape, is offered on delustring barrel 5 multiple sizes of polygon
Shape through-hole 51, bore of the polygonal through hole 51 at optical axis is larger, smaller far from the bore at optical axis, is trapezoidal shape structure；
For polygonal through hole 51 closer to optical axis, the bore of polygonal through hole 51 is bigger.According to its architectural characteristic, disappear when signal beams pass through
When light barrel 5, out-of-order light is launched in the polygonal through hole 51 of delustring barrel 5, since polygonal through hole 51 is ladder
Shape and structure, light are difficult to be reflected back inside delustring barrel 5 from the smaller one end of bore again after entering from the larger one end of bore, thus
Influence of the stray light to signal beams is eliminated, so that signal beams are more high-quality.
Specifically, as shown in Figure 1, the aperture of the delustring barrel 5 is greater than the outer diameter of the receiving element 3；The delustring
The outer diameter difference of the aperture of barrel 5 and the receiving element 3 is less than preset threshold.
In the present embodiment, the aperture of delustring barrel 5 is greater than the outer diameter of receiving element 3, so that miscellaneous derived from delustring barrel 5
Astigmatism all scatters in delustring cavity 1, if the aperture of delustring barrel 5 is less than the outer diameter of the receiving element 3, will lead to spuious
Light imports in receiving element 3, influences signal quality.A threshold value can be preset, it is big come the aperture that controls delustring barrel 5
It is small.Such as setting threshold value is 2cm, then the difference of the outer diameter of the aperture of delustring barrel 5 and receiving element 3 is less than 2cm, can determine
The size in the aperture of delustring barrel 5.
In one embodiment, 1 inner surface of delustring cavity is black treated the surface of anodic oxidation.
In the present embodiment, the inner surface of delustring cavity 1 passes through the black processing of anodic oxidation, and part stray light can be absorbed,
Signal beams enter in delustring cavity 1 by receiving lens 1, and the inner surface of delustring cavity 1 carries out the stray light of signal beams
It eliminates for the first time.
In one embodiment, optionally, the receiving lens 2 are plano-convex lens, biconvex lens, spherical lens, aspheric
Any one in face lens, free-form surface lens and lens group.
In the present embodiment, receiving lens 2 can be the convex lens of any one focusing light effect, such as plano-convex lens,
Biconvex lens, spherical lens, non-spherical lens, free-form surface lens or convex lens group, lenticular microscope group, spherical lens group,
Non-spherical lens group, free-form surface lens group etc..
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of stray light cancellation element, comprising: delustring cavity, the receiving lens for being mounted on the delustring inside cavity, installation
In the receiving element of the delustring containment portion, which is characterized in that described device further includes being set to the delustring inside cavity
Delustring diaphragm and delustring barrel；The receiving lens, the receiving element and the delustring barrel are located in same optical axis；
The delustring diaphragm is located at the focus area of the receiving lens, and the delustring diaphragm is provided at the axial location
Light hole；
The delustring barrel is located among the delustring diaphragm and the receiving element.
2. stray light cancellation element according to claim 1, which is characterized in that the delustring diaphragm receives thoroughly towards described
The one side of mirror is diamond structure.
3. stray light cancellation element according to claim 2, which is characterized in that the surface angle of diamond structure is 90 °.
4. stray light cancellation element according to claim 1-3, which is characterized in that opened up on the delustring barrel
There are multiple polygonal through hole.
5. stray light cancellation element according to claim 1-3, which is characterized in that the polygonal through hole is ladder
Shape structure.
6. stray light cancellation element according to claim 5, which is characterized in that the polygonal through hole closer to optical axis,
The bore of the polygonal through hole is bigger.
7. stray light cancellation element according to claim 1-3, which is characterized in that the aperture of the delustring barrel
Greater than the outer diameter of the receiving element.
8. stray light cancellation element according to claim 7, which is characterized in that the aperture of the delustring barrel connects with described
The outer diameter difference for receiving element is less than preset threshold.
9. stray light cancellation element according to claim 1-3, which is characterized in that the delustring cavity inner surface
For black treated the surface of anodic oxidation.
10. stray light cancellation element according to claim 1-3, which is characterized in that the receiving lens are flat
Any one in convex lens, biconvex lens, spherical lens, non-spherical lens, free-form surface lens and lens group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811376182.7A CN109459739B (en) | 2018-11-19 | 2018-11-19 | Stray light eliminating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811376182.7A CN109459739B (en) | 2018-11-19 | 2018-11-19 | Stray light eliminating device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109459739A true CN109459739A (en) | 2019-03-12 |
| CN109459739B CN109459739B (en) | 2024-02-27 |
Family
ID=65610898
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811376182.7A Active CN109459739B (en) | 2018-11-19 | 2018-11-19 | Stray light eliminating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109459739B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111257233A (en) * | 2020-03-24 | 2020-06-09 | 河南中原光电测控技术有限公司 | Extinction device |
| CN113376845A (en) * | 2021-06-21 | 2021-09-10 | 中国工程物理研究院激光聚变研究中心 | Stray light absorbing device |
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| CN1410756A (en) * | 2002-11-14 | 2003-04-16 | 上海交通大学 | Particle radius, concentration photosensor |
| CN101762873A (en) * | 2010-01-15 | 2010-06-30 | 浙江大学 | Cassegrain for enhancing stray light-extinction effect and improved-type imaging system thereof |
| US20110188121A1 (en) * | 2009-08-25 | 2011-08-04 | Trimble Jena Gmbh | Measuring device with a reduced share of stray light |
| CN204718931U (en) * | 2015-05-12 | 2015-10-21 | 杜晨光 | A kind of high-precision microminiaturized particulate matter sensors |
| CN108594263A (en) * | 2018-01-30 | 2018-09-28 | 北醒（北京）光子科技有限公司 | A kind of laser radar and Unmanned Systems |
| CN209979837U (en) * | 2018-11-19 | 2020-01-21 | 深圳市速腾聚创科技有限公司 | Stray light eliminating device |
-
2018
- 2018-11-19 CN CN201811376182.7A patent/CN109459739B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1410756A (en) * | 2002-11-14 | 2003-04-16 | 上海交通大学 | Particle radius, concentration photosensor |
| US20110188121A1 (en) * | 2009-08-25 | 2011-08-04 | Trimble Jena Gmbh | Measuring device with a reduced share of stray light |
| CN101762873A (en) * | 2010-01-15 | 2010-06-30 | 浙江大学 | Cassegrain for enhancing stray light-extinction effect and improved-type imaging system thereof |
| CN204718931U (en) * | 2015-05-12 | 2015-10-21 | 杜晨光 | A kind of high-precision microminiaturized particulate matter sensors |
| CN108594263A (en) * | 2018-01-30 | 2018-09-28 | 北醒（北京）光子科技有限公司 | A kind of laser radar and Unmanned Systems |
| CN209979837U (en) * | 2018-11-19 | 2020-01-21 | 深圳市速腾聚创科技有限公司 | Stray light eliminating device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111257233A (en) * | 2020-03-24 | 2020-06-09 | 河南中原光电测控技术有限公司 | Extinction device |
| CN113376845A (en) * | 2021-06-21 | 2021-09-10 | 中国工程物理研究院激光聚变研究中心 | Stray light absorbing device |
| CN113376845B (en) * | 2021-06-21 | 2022-03-18 | 中国工程物理研究院激光聚变研究中心 | Stray light absorbing device |
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| Publication number | Publication date |
|---|---|
| CN109459739B (en) | 2024-02-27 |
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