CN107102435A - A kind of optical imaging method reconstructed based on scattered light - Google Patents
A kind of optical imaging method reconstructed based on scattered light Download PDFInfo
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- CN107102435A CN107102435A CN201710293623.6A CN201710293623A CN107102435A CN 107102435 A CN107102435 A CN 107102435A CN 201710293623 A CN201710293623 A CN 201710293623A CN 107102435 A CN107102435 A CN 107102435A
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- imaging
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/42—Diffraction optics, i.e. systems including a diffractive element being designed for providing a diffractive effect
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/58—Optics for apodization or superresolution; Optical synthetic aperture systems
Abstract
The invention discloses a kind of optical imaging method reconstructed based on scattered light, specifically include：The diverse location of target being observed passes through wall diffusing reflection；Reflected light after diffusing reflection sequentially passes through conjugate imaging mirror by different paths；Then micropore is then passed through, the inverted picture of the target being observed is presented on surface detector, is realized around the non-ken imaging of wall；Wherein, the conjugate imaging mirror, micropore and surface detector composition imaging system；The wall is the diffusing reflection information conversion carrier between the target being observed and imaging system；Separated between the target being observed and the imaging system by barrier, the barrier is the not transparent solid substance of visible light wave.The imaging method compare the non-ken imaging mode of active probe, there is small volume, portable and cost it is low.
Description
Technical field
The present invention relates to optical image technology field, more particularly to a kind of optical imaging method reconstructed based on scattered light.
Background technology
In avenue environment or building, the ken of people is limited to wall or other buildings etc. and blocked, traditional
Imaging technique and equipment are difficult to the target scene imaging outside the ken, if it is possible to bypass blocking for turning or barrier
Object is imaged, the target positioning outside the ken is realized, then can reduce the casualties of such as modern city and towns street fighting, be lifted
The battle space awareness ability and Operational Effectiveness Rat of army.A variety of special equipments, such as through-wall radar are pointedly developed for this foreign countries
It is the technology that through-wall detection is realized using the strong characteristic of ULTRA-WIDEBAND RADAR ripple penetration power, radar wave again passes through wall through target reflection
Received after body by reception antenna, the system also utilizes the micro-Doppler feature of low speed mobile object, detects the life entity of target
Levy, to after wall in original place is static, original place body dynamic, the human body target of the state such as tangential motion and radial motion all have it is good
Detectivity, but the weak point of the technology is that target information is only capable of in the form of luminous point occurring on a display screen, it is impossible to react
Go out the detailed information such as the appearance and size, shape and destination properties of target.
Non- ken target laser imaging has turned into public security, anti-terrorism, the concern direction in military investigation field, and wall, building are turned
Blocking for angle makes us can not see target, and target can not be also detected with traditional imaging method, therefore in the urgent need to development
New Detection Techniques are detected to non-ken scene.
The content of the invention
It is an object of the invention to provide a kind of optical imaging method reconstructed based on scattered light, the imaging method is compared to actively
Detect non-ken imaging mode, there is small volume, portable and cost it is low.
A kind of optical imaging method reconstructed based on scattered light, methods described is included：
The diverse location of target being observed passes through wall diffusing reflection；
Reflected light after diffusing reflection sequentially passes through conjugate imaging mirror by different paths；
Then micropore is then passed through, the inverted picture of the target being observed is presented on surface detector, is realized around the non-ken of wall
Imaging；
Wherein, the conjugate imaging mirror, micropore and surface detector composition imaging system；
The wall is the diffusing reflection information conversion carrier between the target being observed and imaging system；
Separated between the target being observed and the imaging system by barrier, the barrier is that visible light wave can not be worn
Saturating solid substance.
The target being observed is simulated using the spot light of two separation.
After same point scattering of two spot lights separated by the wall, the micro porous filtration other positions are utilized
The veiling glare at place, the spot light by described two separation on the surface detector is distinguished.
Methods described also includes：
Increase the number of the imaging system, realize that multi-dimension array is distributed, signal acquisition is carried out to same observation station, utilize
The imaging systems of different angles obtains different scattering field distribution, by increased non-redundant information improve effectively observation visual field and
Imaging resolution.
Methods described also includes：
Increase the number of the imaging system, and the observation station of each imaging system is inconsistent, by gathering multiple points
Information obtains the three-dimensional spatial information of target field.
The resolution ratio of the non-ken imaging is determined by micropore size.
As seen from the above technical solution provided by the invention, the imaging method can be realized around wall imaging, in particular field
Close to be imaged by " turn " and the imaging function that general imaging device is unable to reach can be achieved, especially led in criminal investigation, anti-terrorism, stability maintenance etc.
Domain application has huge prospect；Imaging system is simple simultaneously, compared to the non-ken imaging mode of active probe, system have small volume,
The portable and low advantage of cost.
Brief description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, being used required in being described below to embodiment
Accompanying drawing be briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for this
For the those of ordinary skill in field, on the premise of not paying creative work, other can also be obtained according to these accompanying drawings
Accompanying drawing.
Fig. 1 is the overall light path schematic diagram of the optical imaging method reconstructed described in the embodiment of the present invention based on scattered light；
Fig. 2 is that Lambert surface described in the embodiment of the present invention scatters Energy distribution schematic diagram；
Fig. 3 is the principle schematic of pinhole imaging system described in the embodiment of the present invention；
Fig. 4 is the display schematic diagram after light screening described in the embodiment of the present invention；
Fig. 5 is the schematic diagram of multiple imaging system described in the embodiment of the present invention；
Fig. 6 is another schematic diagram of multiple imaging system described in the embodiment of the present invention.
Embodiment
With reference to the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Ground is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.Based on this
The embodiment of invention, the every other implementation that those of ordinary skill in the art are obtained under the premise of creative work is not made
Example, belongs to protection scope of the present invention.
The embodiment of the present invention is described in further detail below in conjunction with accompanying drawing, is as shown in Figure 1 present invention implementation
The overall light path schematic diagram of the example optical imaging method reconstructed based on scattered light, figure include target being observed, wall, into
As system and barrier, wherein：
Conjugate imaging mirror, micropore and surface detector composition imaging system；
The wall is the diffusing reflection information conversion carrier between the target being observed and imaging system；
Separated between the target being observed and the imaging system by barrier, the barrier is that visible light wave can not be worn
Saturating solid substance；
In this embodiment, target being observed can also be used many using the spot light simulation of two separation in implementing
Individual spot light, specific light path process is：
First, the diverse location of target being observed passes through wall diffusing reflection；
Reflected light after diffusing reflection sequentially passes through conjugate imaging mirror by different paths；
Then micropore is then passed through, the inverted picture of the target being observed is presented on surface detector, is realized around the non-ken of wall
Imaging.In the specific implementation, the resolution ratio of the non-ken imaging is determined by micropore size.
Above-mentioned imaging process combines pinhole imaging system principle and scattering field distribution, its principle and process is carried out below detailed
Description：
First it can be seen from diffusing reflection target bi scatter distributions function BSDF scattering properties, Non Lambert reflector surface is different
The intensity distribution for scattering direction is uneven, and the Energy distribution of scattered light difference angle meets below equation：
Wherein,For the unit vector projection on the surface in mirror-reflection direction,To scatter the unit vector in direction
Projection on the surface, its poor absolute valueFor BSDF variable, ABg is constant, by different materials surface characteristic
Determine.
It is illustrated in figure 2 Lambert surface described in the embodiment of the present invention and scatters Energy distribution schematic diagram, heavy line is lambert's body
Surface, thick dashed line is incident light, and fine dotted line is scattered light, and fine line is energy distribution curve.When the spot light of two separation leads to
After the same point scattering for crossing the wall, the directionality of main lobe is determined by incident direction, can thus utilize the micropore mistake
The veiling glare at other positions is filtered, the spot light by described two separation on the surface detector is distinguished.
The principle schematic of pinhole imaging system described in the embodiment of the present invention is illustrated in figure 3, according to the straightline propagation of light, target
Diverse location passes through micropore by different paths, occurs the inverted picture of target on surface detector, imaging resolution is by micropore
Size is determined.
Above-mentioned imaging process is described with specific example below：
Here physical holes conjugate imaging is equivalent to a field stop in the mode in lambert's body surface face in fact, passed through
The light of aperture is from the scattered light of lambert's body same point, and the energy of different directions carries the hair of space diverse location
Light source information, by software emulation, can obtain the rule of light propagation and the Energy distribution of detector；
Then specific parameter is inputted again, including：The spacing 60mm, target sizes 1mm, target of the spot light of two separation
From the vertical range 200mm of wall central point, the scatter distributions of wall are according to ABg model specifications, wherein B=0.001, g=
0.8, light number 10000 is write afterwards, the light number by aperture is improved using important sampling, display is such as Fig. 4 institutes after light screening
Show.
By simulation analysis, the light Selection effect of aperture is preferable, and it is all same by wall to reach the light of surface detector
The scattered light of a bit, meets the primary condition of scattering pinhole imaging system, from simulation result：The intensity distribution that 2 points of space can be clear
It is clear to differentiate, realize around the non-ken imaging of wall.
Further, the number of the imaging system can also be increased, realize that multi-dimension array is distributed, be illustrated in figure 5 this
In the schematic diagram of multiple imaging system described in inventive embodiments, Fig. 5：Multiple imaging systems are entered to same observation station (xyz (0,0,0))
Row signal acquisition, obtains different scattering field distribution using the imaging system of different angles, is carried by increased non-redundant information
High effectively observation visual field and imaging resolution.
Alternatively, it is also possible to increase the number of the imaging system, and the observation station of each imaging system is inconsistent, such as Fig. 6
It show in another schematic diagram of multiple imaging system described in the embodiment of the present invention, Fig. 6：Multiple imaging systems gather the letter of difference
Breath, obtains the three-dimensional spatial information of target field, the program can be finally inversed by the space of target field by gathering the information of multiple points
Intensity distribution, due to adding sampled point on wall, can obtain the three-dimensional spatial information of target field by Correlation method for data processing.
In summary, imaging method described in the embodiment of the present invention combines pinhole imaging system principle and scattering field distribution, can be real
Now it is imaged around wall, is imaged in special occasions by " turn " and the imaging function that general imaging device is unable to reach can be achieved, especially
In fields such as criminal investigation, anti-terrorism, stability maintenances, application has huge prospect；Imaging system is simple simultaneously, compared to the non-ken imaging of active probe
Mode, system has the advantages that small volume, portable and cost is low.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art is in the technical scope of present disclosure, the change or replacement that can be readily occurred in,
It should all be included within the scope of the present invention.Therefore, protection scope of the present invention should be with the protection model of claims
Enclose and be defined.
Claims (6)
1. a kind of optical imaging method reconstructed based on scattered light, it is characterised in that methods described includes：
The diverse location of target being observed passes through wall diffusing reflection；
Reflected light after diffusing reflection sequentially passes through conjugate imaging mirror by different paths；
Then micropore is then passed through, the inverted picture of the target being observed is presented on surface detector, is realized around the non-ken imaging of wall；
Wherein, the conjugate imaging mirror, micropore and surface detector composition imaging system；
The wall is the diffusing reflection information conversion carrier between the target being observed and imaging system；
Separated between the target being observed and the imaging system by barrier, the barrier is that visible light wave is not transparent
Solid substance.
2. the optical imaging method reconstructed according to claim 1 based on scattered light, it is characterised in that
The target being observed is simulated using the spot light of two separation.
3. the optical imaging method reconstructed according to claim 2 based on scattered light, it is characterised in that
After same point scattering of two spot lights separated by the wall, at the micro porous filtration other positions
Veiling glare, the spot light by described two separation on the surface detector is distinguished.
4. the optical imaging method reconstructed according to claim 1 based on scattered light, it is characterised in that methods described is also wrapped
Include：
Increase the number of the imaging system, realize that multi-dimension array is distributed, signal acquisition is carried out to same observation station, difference is utilized
The imaging system of angle obtains different scattering field distribution, and effectively observation visual field and imaging are improved by increased non-redundant information
Resolution ratio.
5. the optical imaging method reconstructed according to claim 1 based on scattered light, it is characterised in that methods described is also wrapped
Include：
Increase the number of the imaging system, and the observation station of each imaging system is inconsistent, by the information for gathering multiple points
To obtain the three-dimensional spatial information of target field.
6. the optical imaging method reconstructed according to claim 1 based on scattered light, it is characterised in that
The resolution ratio of the non-ken imaging is determined by micropore size.
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| CN111694014A (en) * | 2020-06-16 | 2020-09-22 | 中国科学院西安光学精密机械研究所 | Laser non-visual field three-dimensional imaging scene modeling method based on point cloud model |
| CN112946990A (en) * | 2021-05-13 | 2021-06-11 | 清华大学 | Non-vision field dynamic imaging system based on confocal mode |
| CN113630560A (en) * | 2021-08-12 | 2021-11-09 | 哈尔滨工业大学 | Active illumination non-vision field secondary penumbra imaging method |
| CN114460805A (en) * | 2020-10-21 | 2022-05-10 | 中国科学院国家空间科学中心 | Shielding scattering imaging system based on high-pass filtering |
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| CN104345318A (en) * | 2014-11-18 | 2015-02-11 | 上海交通大学 | Wall corner bypassing type imaging system and imaging method based on calculating correlation imaging |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111694014A (en) * | 2020-06-16 | 2020-09-22 | 中国科学院西安光学精密机械研究所 | Laser non-visual field three-dimensional imaging scene modeling method based on point cloud model |
| CN111694014B (en) * | 2020-06-16 | 2022-12-09 | 中国科学院西安光学精密机械研究所 | Laser non-visual field three-dimensional imaging scene modeling method based on point cloud model |
| CN114460805A (en) * | 2020-10-21 | 2022-05-10 | 中国科学院国家空间科学中心 | Shielding scattering imaging system based on high-pass filtering |
| CN112946990A (en) * | 2021-05-13 | 2021-06-11 | 清华大学 | Non-vision field dynamic imaging system based on confocal mode |
| CN113630560A (en) * | 2021-08-12 | 2021-11-09 | 哈尔滨工业大学 | Active illumination non-vision field secondary penumbra imaging method |
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Application publication date: 20170829 |