CN207937636U - A kind of large field of view scan imaging optical system - Google Patents
A kind of large field of view scan imaging optical system Download PDFInfo
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- CN207937636U CN207937636U CN201820343001.XU CN201820343001U CN207937636U CN 207937636 U CN207937636 U CN 207937636U CN 201820343001 U CN201820343001 U CN 201820343001U CN 207937636 U CN207937636 U CN 207937636U
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Abstract
The utility model is related to optical imaging field, a kind of large field of view scan imaging optical system, including imaging lens group, diaphragm, light guide and optical detector；The imaging lens group, diaphragm, light guide and optical detector are arranged successively along the direction of travel for receiving light, the diaphragm is set in the image planes of imaging lens group, the light inlet of the light guide is set to side of the diaphragm far from lens group, and the distance of the light-emitting window of the photosurface of the optical detector to light guide is 0 to 2 millimeters.Large field of view scan imaging optical system provided by the utility model, it is simple in structure, it is combined by using imaging lens group, diaphragm, light guide and optical detector and increases field of view of receiver, while inhibiting the interference of non-targeted object reflection veiling glare using optical filter and diaphragm.
Description
Technical field
The utility model is related to optical imaging field, especially a kind of large field of view scan imaging optical system.
Background technology
Optical imaging system based on spot scan, such as laser radar based on MEMS, manufacturing cost is low, and sweep speed is fast.
Problem is that MEMS sizes itself are small, if for coaxially receiving optical information, is swept compared to mechanical rotation scan or large area galvanometer
It retouches, reception energy is very low, and generally use non co axial receives optical information.And the light receiving area of single-point optical detector is small, receives
Signal strength is low.It is to increase the minute surface area of MEMS that MEMS radars, which improve received signal strength first method, can be made into this way
Originally it greatly improves, while the flatness of large mirror reduces, scan frequency declines.Another method will be connect using condenser lens
It receives light and focuses to detector hole or optical fiber end, but off axis reflector optical signal can not be received, this can limit the acceptance angle of radar system
Degree.The method for promoting acceptance angle is to use detector array, of high cost and increase circuit complexity；Or use big photosurface
Product detector, but will increase the noise equivalent power device capacitor of area increase simultaneously and increase, the response time is elongated, cannot be satisfied
Quickly measurement and high-acruracy survey.
Utility model content
For the defects in the prior art, the utility model provides a kind of large field of view scan imaging optical system, structure letter
Single pass-through is combined using imaging lens group, diaphragm, light guide and optical detector and increases field of view of receiver, while utilizing optical filter
The interference of non-targeted object reflection veiling glare is inhibited with diaphragm.
To achieve the goals above, a kind of large field of view scan imaging optical system provided by the utility model, including imaging
Lens group, diaphragm, light guide and optical detector；The imaging lens group, diaphragm, light guide and optical detector are along the row for receiving light
It arranges successively into direction, the diaphragm is set in the image planes of imaging lens group, and the light inlet of the light guide is set to diaphragm
The distance of side far from lens group, the light-emitting window of the photosurface of the optical detector to light guide is 0 to 2 millimeters.
As a kind of preferred embodiment of the application, the imaging lens group includes the first planoconvex lens, concavees lens, filter
Mating plate, the second planoconvex lens and third planoconvex lens；First planoconvex lens, concavees lens, the first optical filter, the second planoconvex lens and third
Planoconvex lens is arranged successively along the direction of travel for receiving light.
As a kind of preferred embodiment of the application, the imaging lens group includes convex lens, plano-concave lens, the second filter
Mating plate, the 4th planoconvex lens and the 5th planoconvex lens；The convex lens, plano-concave lens, the second optical filter, the 4th planoconvex lens and the 5th are flat
Convex lens is arranged successively along the direction of travel for receiving light.
As a kind of preferred embodiment of the application, the shape and size and imaging lens group of the light admission port of the diaphragm
Visual field size match.
As a kind of preferred embodiment of the application, the size of the light guide light inlet is more than diaphragm light admission port, institute
It is close with optical detector photosurface size to state light guide light-emitting window size.
As a kind of preferred embodiment of the application, the light guide is compound parabolic concentrator；The compound throwing
A diameter of maximum sized 100%-110% of diaphragm light admission port of the light inlet of object plane concentrator, the composite parabolic optically focused
The a diameter of maximum sized 80%-500% of optical detector photosurface of light-emitting window of device.
As a kind of preferred embodiment of the application, the light guide is conic optic fiber beam；The conic optic fiber beam
A diameter of maximum sized 100%-110% of diaphragm light admission port of light inlet, a diameter of light of light-emitting window of the conic optic fiber beam
The 80%-500% of detector photosensitive area.
As a kind of preferred embodiment of the application, the light guide is one point of multi fiber beam, one point of multi fiber
A diameter of maximum sized 100%-110% of diaphragm light admission port of the light inlet of beam, the light-emitting window of one point of multi fiber beam arrive
The distance of the photosurface of optical detector is 0 to 2 millimeters.
The utility model has the beneficial effects that：The utility model provides a kind of large field of view scan imaging optical system, structure
Simply by being combined using imaging lens group, diaphragm, light guide and optical detector and increasing field of view of receiver, while utilizing optical filtering
Piece and diaphragm inhibit the interference of non-targeted object reflection veiling glare.
Description of the drawings
Fig. 1 is the block diagram of the utility model large field of view scan imaging optical system embodiment one；
Fig. 2 is the schematic diagram of the utility model large field of view scan imaging optical system embodiment two；
Fig. 3 is the schematic diagram of the utility model large field of view scan imaging optical system embodiment three；
Fig. 4 is the schematic diagram of the utility model large field of view scan imaging optical system example IV；
Fig. 5 is the schematic diagram of the utility model large field of view scan imaging optical system embodiment five；
Fig. 6 is the schematic diagram of the utility model large field of view scan imaging optical system embodiment six.
Specific implementation mode
Specific embodiment of the utility model is described more fully below, it should be noted that the embodiments described herein is served only for
For example, being not intended to limit the utility model.In the following description, in order to provide the thorough understanding to the utility model,
Elaborate a large amount of specific details.It will be apparent, however, to one skilled in the art that：These certain details need not be used
It saves to carry out the utility model.In other instances, in order to avoid obscuring the utility model, well known circuit is not specifically described,
Software or method.
Throughout the specification, meaning is referred to " one embodiment ", " embodiment ", " example " or " example "
It：A particular feature, structure, or characteristic described in conjunction with this embodiment or example is comprised at least one implementation of the utility model
In example.Therefore, the whole instruction it is each place occur the phrase " in one embodiment ", " in embodiment ", " one
Example " or " example " are not necessarily all referring to the same embodiment or example.Furthermore, it is possible to any combination appropriate and or sub-portfolio
By specific feature, structure or characteristic combination in one or more embodiments or example.In addition, those of ordinary skill in the art
It should be appreciated that diagram is provided to the purpose of explanation provided herein, and diagram is not necessarily drawn to scale.
The first embodiment of large field of view scan imaging optical system：
As shown in Figure 1, a kind of first embodiment of large field of view scan imaging optical system, including imaging lens group 200, light
Door screen 300, light guide 400 and optical detector 500；The imaging lens group 200, diaphragm 300, light guide 400 and optical detector 500
It arranges successively along the direction of travel for receiving light 100, the diaphragm 300 is set in the image planes of imaging lens group 200, the leaded light
The light inlet of part 400 is set to side of the diaphragm 300 far from lens group, the photosurface of the optical detector 500 to light guide 400
Light-emitting window distance be 0 to 2 millimeters.
Specifically, being combined increasing by using imaging lens group 200, diaphragm 300, optical detector 500 and optical detector 500
Added the field of view of receiver of system, the lens group 200 includes optical filter, the position of the optical filter should be in lens light with
The position of optical axis included angle minimum inhibits the interference of non-targeted object reflection veiling glare using optical filter and diaphragm 300.In addition, logical
It crosses aforesaid way more to simplify by system composition, reduces unnecessary structure, reduce costs of production and operation, system of having raised the price
Practicability.
In the present embodiment, the shape and size of the light admission port of the diaphragm 300 and the visual field size phase of imaging lens group 200
Matching.
Pass through institute specifically, can effectively ensure that by using the diaphragm 300 that the visual field with imaging lens group 200 matches
The light beam for stating diaphragm 300 is only imaging beam, avoids non-targeted object and reflects veiling glare also by diaphragm 300, further functions as
Inhibit the purpose of interference.
In the present embodiment, the size of 400 light inlet of the light guide is more than 300 light admission port of diaphragm, and the light guide 400 goes out
Optical port size is close with 500 photosurface size of optical detector.
Specifically, the light guide 400 can by by the central ray of the imaging beam after lens group and diaphragm 300 and
Non-central light by light guide 400 light-emitting window whole directive optical detector 500 photosurface, ensure that optical detector 500
Detection accuracy.
The second embodiment of large field of view scan imaging optical system：
As shown in Fig. 2, the second embodiment of large field of view scan imaging optical system and the large field of view scan image optics
The first embodiment of system is compared to its distinctive points：The imaging lens group includes the first planoconvex lens 201, concavees lens 202, filter
Mating plate 203, the second planoconvex lens 204 and third planoconvex lens 205；First planoconvex lens 201, concavees lens 202, the first optical filter
203, the second planoconvex lens 204 and third planoconvex lens 205 are arranged successively along the direction of travel for receiving light.
It needs to illustrate, in the large field of view scan imaging optical system, the design of the imaging lens group
Be can according to visual field, F numbers variation and be changed.In addition, unmentioned system components in the present embodiment, with
Substantially similar recorded in the first embodiment of large field of view scan imaging optical system, details are not described herein.
The 3rd embodiment of large field of view scan imaging optical system：
As shown in figure 3, the 3rd embodiment of large field of view scan imaging optical system and the large field of view scan image optics
The first embodiment of system is compared to its distinctive points：The imaging lens group includes convex lens 211, plano-concave lens 212, second
Optical filter 213, the 4th planoconvex lens 214 and the 5th planoconvex lens 215；The convex lens 211, plano-concave lens 212, the second optical filter
213, the 4th planoconvex lens 214 and the 5th planoconvex lens 215 are arranged successively along the direction of travel for receiving light.
It needs to illustrate, in the large field of view scan imaging optical system, the design of the imaging lens group
Be can according to visual field, F numbers variation and be changed.In addition, in the present embodiment unmentioned system components with
Substantially similar recorded in the first embodiment of large field of view scan imaging optical system, details are not described herein.
The fourth embodiment of large field of view scan imaging optical system：
As shown in figure 4, the fourth embodiment of large field of view scan imaging optical system and the large field of view scan image optics
The first embodiment of system is compared to its distinctive points：The light guide is compound parabolic concentrator 421；The compound parabolic
A diameter of diaphragm maximum sized 100%-110% of 321 light admission port of the light inlet of face concentrator 421, the composite parabolic
The maximum sized 80%-500% of photosurface of a diameter of optical detector of the light-emitting window of concentrator 421 521.
Specifically, the compound parabolic concentrator 421 can by by the imaging beam after lens group and diaphragm 321 into
Row mixing, make imaging beam central ray and non-central light by compound parabolic concentrator 421 light-emitting window whole directive
The photosurface of optical detector 521.It needs to illustrate, unmentioned system components and big visual field in the present embodiment
Substantially similar recorded in the first embodiment of scanned imagery optical system, details are not described herein.
5th embodiment of large field of view scan imaging optical system：
As shown in figure 5, the fourth embodiment of large field of view scan imaging optical system and the large field of view scan image optics
The first embodiment of system is compared to its distinctive points：The light guide is conic optic fiber beam 431；The conic optic fiber beam 431
A diameter of diaphragm of light inlet lead to 331 optical ports maximum sized 100%-110%, the light-emitting window of the conic optic fiber beam 431
The 80%-500% of 531 photosensitive area of a diameter of optical detector.
It is constituted specifically, the conic optic fiber beam 431 is more light shafts, and each fiber optic bundle is all taper
, small light can will be converted to by imaging beam big after lens group and diaphragm 331 by the conic optic fiber beam 431
Spot, and then the different location of the photosurface of optical detector 531 is injected, realize the effect of large field of view scan.It needs to illustrate
, unmentioned system components and institute in the first embodiment of large field of view scan imaging optical system in the present embodiment
That records is substantially similar, and details are not described herein.
The sixth embodiment of large field of view scan imaging optical system：
As shown in fig. 6, the fourth embodiment of large field of view scan imaging optical system and the large field of view scan image optics
The first embodiment of system is compared to its distinctive points：The light guide is one point of multi fiber beam 441, one point of multi fiber beam
The maximum sized 100%-110% of 341 light admission port of a diameter of diaphragm of 441 light inlet, one point of multi fiber beam 441 go out
The distance of optical port to the photosurface of optical detector 541 is 0 to 2 millimeters.
Specifically, one point of multi fiber beam 441 refers to being the thick fiber optic bundle of 1 beam, thick light close to 341 side of diaphragm
Harness is also connected with a plurality of thin fiber optic bundle, using one point of multi fiber beam 441 can will be by lens group and diaphragm 341 after
Imaging beam is divided into the thin light beam of different angle, to inject optical detector 541 photosurface different location, realize big
The effect of visual field scanning.It needs to illustrate, unmentioned system components and large field of view scan in the present embodiment
Substantially similar recorded in the first embodiment of imaging optical system, details are not described herein.
Finally it should be noted that：The above various embodiments is only to illustrate the technical solution of the utility model, rather than limits it
System；Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should
Understand：It still can be with technical scheme described in the above embodiments is modified, either to which part or whole
Technical characteristic carries out equivalent replacement；And these modifications or replacements, this practicality that it does not separate the essence of the corresponding technical solution are new
The range of each embodiment technical solution of type, should all cover in the claim of the utility model and the range of specification.
Claims (8)
1. a kind of large field of view scan imaging optical system, it is characterised in that：It is visited including imaging lens group, diaphragm, light guide and light
Survey device；The imaging lens group, diaphragm, light guide and optical detector are arranged successively along the direction of travel for receiving light, the diaphragm
It is set in the image planes of imaging lens group, the light inlet of the light guide is set to side of the diaphragm far from lens group, the light
The distance of the photosurface of detector to the light-emitting window of light guide is 0 to 2 millimeters.
2. large field of view scan imaging optical system according to claim 1, it is characterised in that：The imaging lens group includes
First planoconvex lens, concavees lens, optical filter, the second planoconvex lens and third planoconvex lens；First planoconvex lens, concavees lens, the first filter
Mating plate, the second planoconvex lens and third planoconvex lens are arranged successively along the direction of travel for receiving light.
3. large field of view scan imaging optical system according to claim 1, it is characterised in that：The imaging lens group includes
Convex lens, plano-concave lens, the second optical filter, the 4th planoconvex lens and the 5th planoconvex lens；The convex lens, plano-concave lens, the second filter
Mating plate, the 4th planoconvex lens and the 5th planoconvex lens are arranged successively along the direction of travel for receiving light.
4. large field of view scan imaging optical system according to claim 1, it is characterised in that：The light admission port of the diaphragm
The visual field size of shape and size and imaging lens group matches.
5. large field of view scan imaging optical system according to claim 1, it is characterised in that：The light guide light inlet
Size is more than diaphragm light admission port, and the light guide light-emitting window size is close with optical detector photosurface size.
6. large field of view scan imaging optical system according to claim 5, it is characterised in that：The light guide is compound throwing
Object plane concentrator；A diameter of maximum sized 100%- of diaphragm light admission port of the light inlet of the compound parabolic concentrator
110%, a diameter of maximum sized 80%-500% of optical detector photosurface of light-emitting window of the compound parabolic concentrator.
7. large field of view scan imaging optical system according to claim 5, it is characterised in that：The light guide is cone of light
Fine beam；A diameter of maximum sized 100%-110% of diaphragm light admission port of the light inlet of the conic optic fiber beam, the cone of light
The 80%-500% of a diameter of optical detector photosensitive area of light-emitting window of fine beam.
8. large field of view scan imaging optical system according to claim 5, it is characterised in that：The light guide is more than one point
Fiber optic bundle, a diameter of maximum sized 100%-110% of diaphragm light admission port of the light inlet of one point of multi fiber beam, described one
The distance of the light-emitting window of point multi fiber beam to the photosurface of optical detector is 0 to 2 millimeters.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820343001.XU CN207937636U (en) | 2018-03-13 | 2018-03-13 | A kind of large field of view scan imaging optical system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820343001.XU CN207937636U (en) | 2018-03-13 | 2018-03-13 | A kind of large field of view scan imaging optical system |
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| CN207937636U true CN207937636U (en) | 2018-10-02 |
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Cited By (2)
| 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 |
| CN110488246A (en) * | 2019-08-20 | 2019-11-22 | 中国科学院苏州纳米技术与纳米仿生研究所 | A kind of big visual field receiving system of two dimension MEMS scanning laser radar |
-
2018
- 2018-03-13 CN CN201820343001.XU patent/CN207937636U/en active Active
Cited By (2)
| 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 |
| CN110488246A (en) * | 2019-08-20 | 2019-11-22 | 中国科学院苏州纳米技术与纳米仿生研究所 | A kind of big visual field receiving system of two dimension MEMS scanning laser radar |
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