CN207423363U - Miniature polarization spectrum imaging detection system - Google Patents
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- CN207423363U CN207423363U CN201721351301.4U CN201721351301U CN207423363U CN 207423363 U CN207423363 U CN 207423363U CN 201721351301 U CN201721351301 U CN 201721351301U CN 207423363 U CN207423363 U CN 207423363U
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Abstract
The utility model relates to a micro polarization spectrum imaging detection system, which comprises a preposed optical system, a large-area array detector component, a pixilated polarization membrane and a linear gradual change optical filter, which are respectively used for realizing the polarization information acquisition and narrow-band filtering of light beams; the linear gradient filter is integrated in front of the light sensing surface of the large-area array detector assembly, and the pixilated polarizing membrane is integrated on the linear gradient filter; or the pixelized polarizing film is integrated in front of the light sensing surface of the large-area array detector assembly, and the linear gradient filter is integrated on the pixelized polarizing film; and the target reflected light passes through the preposed optical system, the pixilated polarizing membrane and the linear gradient filter to form a target image on the large-area array detector assembly. The weight and the volume of the detection system are greatly reduced, two thin film sheets are added in the detection system like a common camera, the weight and the volume are almost equal to those of the common camera, the structural complexity of an optical-mechanical system is far lower than that of a polarization spectrum imaging device based on the prior technical scheme, and the miniaturization of the system is facilitated.
Description
Technical field
The utility model belongs to polarization spectrum imaging technical field, and in particular to a kind of minitype polarization light spectrum image-forming detection system
System.
Background technology
It is the target that optics sensor is constantly pursued to the more multiattribute acquisition of target.With spectral imaging technology and
With ripe, light spectrum image-forming and polarization imaging have combined to form a kind of new optical detector technology-partially for the development of polarization imaging technology
Vibrational spectrum imaging technique.Polarization spectrum imaging technology can carry out the spatial image information, spectral information and polarization information of target
Detection is had apparent principle advance and technical advantage, target is known using spectral information or polarization information merely
It is not had some limitations with detection, the two is carried out organically with reference to the detection recognition capability that can be improved to target.Especially
It is suitble to the target acquisition under the conditions of turbid media (cigarette, mist, haze, dirt, water body etc.) etc., to detect to feel in complex background
The target of the hidden ability of height particularly through spectrum is pretended or had to the target of interest, provides a kind of new effective method.
Also due to polarization state possesses the characteristics of " strong light reduction " and " dim light reinforcing ", it can greatly extend the detection at dark-bright both ends of remote sensing
Area.Meanwhile atmospheric attenuation can be described accurately with polarization means and law discovery or new atmospheric window theory carry
For objective basis.
At present, polarization spectrum imaging detection method is mainly the following mode：
1st, the polarization spectrum imaging side based on tunable spectrum device such as AOTF (acousto-optic tunable) and LCTF (liquid crystal tuning)
Method
Such as D.A.Glenar, J.J.Hillman, B Saif, et al.POLARIS-II:an acousto-optic
imaging spectropolarimeter for ground-based astronomy[J].SPIE,1992,1747:90~
102；T.SUZUKI,H.KUROSAKI,Shigeharu ENKYO,et al.Application of an AOTF imaging
spectropolarimetry[J].SPIE,1997,3121:356~365 are adjusted using acoustooptic diffraction principle and with liquid crystal electricity
Humorous principle carries out the selection of spectrum, meanwhile, the measurement of polarization state is carried out using combinations such as phase delay device LCVR, due to
Tunable spectrum device needs special driving circuit, therefore causes its system power dissipation larger.
2nd, the polarization spectrum imaging method of calculating computed tomography type
Such as M.J.Duggin, R.L.Algorithms for target discrimination and contrast
enhancement using narrowband polarimetric image data[J].Proceedings of SPIE,
2002,4480:248~256；R.W.Aumiller,C.V.EustaceL.Dereniak,et al.Snapshot imaging
spectropolarimetry in the visible and infrared[J].Proceedings of SPIE,2008,
6972:69720D；B.H.Miles,R.A.Googson,E.L.Dereniak,et al.Computed-tomography
imaging spectropolarimeter(CTISP):instrument design,operation and results[J]
.SPIE,1999,3753:169~180, by polarizer and wave plate that multiple and different polarization directions are installed carry out polarization state and
The detection of spectral information, shortcoming are that the time of measuring polarization state is long, have moving component, under the conditions of polarization state is fast-changing not
It is applicable in, and it is complicated, it is unfavorable for the micromation and lightweight of equipment.
3rd, the spectrum polarizing method based on slit dispersion
Such as S.H.Jones, F.J.Iannarilli, P.L.Kebabian.Realization of quantitative-
grade fieldable snapshot imaging spectropolarimeter[J].Optics Express,2004,12
(26):6559~6573；E.Kim,D.Dave,T.E Milner.Polarization based microscopy using a
fiber optic spectral polarimeter[J].Proceedings of SPIE,2002,4617:191~199, all
Using polarization-spectral intensity modulation technique, by added in common slit dispersive spectrometer light path spectral modulation module come
Realize the measurement of polarization state, the disadvantages of this method is that system uses slit, and capacity usage ratio is than relatively low, while there are aliasings for spectrum
Phenomenon.
4th, the polarization spectrum imaging method based on polarization grating
Such as J.Kim, M.J.Escuti.Demonstration of polarization grating imaging
spectropolarimeter(PGIS)[J].Proc of SPIE,2010,7672:767208, system that employs a kind of new
The transmission-type anisotropic polarization sensitivity grating of type, which can realize the separation of polarization peacekeeping spectrum dimension, but the system exists
There are aliasings, the measurement of polarization state in terms of spectrum acquisition to need to calculate by combining, meanwhile, there are slit, energy for the system
It is not high to measure utilization rate.
5th, the polarization spectrum imaging method based on inteference imaging spectrometer
Such as M.W.Kudenov, M.E.L.Jungwirth, E.L.Dereniak, etal.White-light
Sganacinterferometer for snapshot multispectral imaging[J].Applied Optics,
2010,49(21):4067-4076；Peng Zhihong, Zhang Chunmin, Zhao, which preserves, often waits Savart in the new polarization interference imaging spectrometers of inclined
Research [J] Acta Physica Sinicas of light microscopic transmissivity, 2006,55 (12):6374~6382, on the basis of inteference imaging spectrometer
On, it is obtained simultaneously in image planes or entrance pupil face addition polarizing diaphragm, movement-less part, different polarization informations, spectrum dimension letter
It after breath needs timesharing to obtain interference information, is obtained by the way of Fourier transformation, the acquisition needs of spectral information are more complicated
Data processing.
Utility model content
In order to overcome the problems, such as above-mentioned existing polarization spectrum imaging detection method, the utility model provides a kind of miniature inclined
Vibrational spectrum imaging detection system solves the shortcomings of conventional polarization light spectrum image-forming detection system system complex, volume is larger；Simultaneously
It is relatively independent to solve polarization state and spectral information existing for conventional polarization light spectrum image-forming detection method, it is impossible to realize polarization and light
There are crosstalk, spectrum recovering restructing algorithm complexity etc. between the fusion of spectrum information, the asynchronous acquisition of polarization state, channel of polarization to lack
Point.
The technical solution of the utility model is to provide a kind of minitype polarization light spectrum image-forming detection system, including preposition optical system
System 1 and large area array detector assembly 4, are characterized in that：Pixelation polarizing diaphragm 2 and linear variable filter 3 are further included,
It is respectively used to realize polarization information acquisition and the narrow-band-filter of light beam；Above-mentioned linear variable filter 3 is integrated in large area array detection
In front of 4 photosurface of device assembly, above-mentioned pixelation polarizing diaphragm 2 is integrated on linear variable filter 3；Or above-mentioned pixelation polarization
Diaphragm 2 is integrated in front of 4 photosurface of large area array detector assembly, and linear variable filter 3 is integrated in pixelation polarizing diaphragm 2
On；
Target reflecting light passes through preposition optical system 1, then by after pixelation polarizing diaphragm 2 and linear variable filter 3,
Target picture is formed on large area array detector assembly 4.
Preferably, above-mentioned pixelation polarizing diaphragm 2 includes multiple polarization units, and it is inclined that each polarization unit includes four kinds of differences
The polarizer of polarization state, the size of each polarizer correspond to N*N Pixel Dimensions of detector, and wherein N is just whole more than or equal to 2
Number.
Preferably, above-mentioned four kinds of different polarization states can be combined as：0 degree, 45 degree, 90 degree, 135 degree or 0 degree, 45 degree, 90
It spends, is non-inclined.
Preferably, the one or more polarization units of physical width covering of above-mentioned 3 passage of linear variable filter；The line
Property gradual filter 3 spectrum gradual change direction pushed away with detector and sweep that direction is parallel, the spectral coverage number needed according to specific detection application
To distribute one or more polarization units.
Preferably, above-mentioned preposition optical system 1 includes telephotolens group and imaging microscope group.
The utility model also provides the polarization spectrum imaging method based on above system, which is characterized in that including following step
Suddenly：
1) push-scanning image, is carried out to target scene, obtains image information；
2) polarization state information, is obtained：
2.1) the single wave band of target point, the gray value letter of single linear polarization in target scene image information, are extracted
Breath for other linear polarization gray value informations of target point, is believed by the linear polarization gray value to adjacent target point
It ceases and is obtained into row interpolation scheduling algorithm；
2.2) degree of polarization, each polarization parameter of the angle of polarization, are calculated according to above-mentioned linear polarization gray value information；
3) spectral information, is extracted；
Push-scanning image process realizes the space-time combined modulation of spectral information, and obtaining spectrum by space-time joint demodulation believes
Breath, process are as follows：It is assumed that target point A push away sweep during image in detector pixel A1~H1 successively, wherein A1 represents detection
The pixel unit that device line a the 1st arranges, H1 represents the pixel unit of the row of detector H rows the 1st, in order to extract the spectrum of target point A
Information takes the half-tone information of pixel A 1 in the first two field picture, takes the half-tone information of pixel B 1 in the second two field picture, and so on,
The spectral information of target point A can be obtained.
The light that a certain target point is sent in target scene is by preposition optical system (imaging system), pixelation polarizing coating
Piece, gradual filter image in large area array detector assembly.Preposition optical system (imaging system) to the light from target point into
Line convergence is imaged；Pixelation polarizing diaphragm carries out polarization filtering to the light from target point；Gradual filter is to coming from target point
Light carry out spectrum narrowband filtering；Large area array detector assembly measures the filtered light of polarization spectrum, is obtained after pushing away and sweeping
Obtain the image information of target point.It is inclined that target point is calculated by the polarization direction gray value information for extracting the target point in image information
Polarization state information by extracting the half-tone information of the corresponding pixel of each two field picture in image information, obtains the spectrum letter of target point
Breath.
The utility model has the advantages that：
1st, Tthe utility model system significantly mitigates detection by the way of pixelation polarizing diaphragm and gradual filter combination
System weight and volume, as in general camera, added in two panels diaphragm, bulking value is nearly identical to general camera, ray machine
System structure complexity is far below the polarization spectrum imaging device based on prior art, is conducive to the micromation of system；
2nd, the utility model method polarization state acquisition is synchronous acquisition, has extraordinary real-time, is overcome traditional inclined
The problem of timesharing for piece runner mode of shaking, asynchronous measurement are brought；
3rd, the system uses pixelation polarizing diaphragm, and there is no moving components, and rotatory polarization is needed compared with traditional approach
Wheel or wave plate, stability are very good；
4th, the reconstruct and acquisition of polarization information, spectral information, it is simple compared with other polarization spectrums detection pattern.
Description of the drawings
Fig. 1 is the utility model minitype polarization light spectrum image-forming detection system schematic diagram；
Fig. 2 is the utility model minitype polarization light spectrum image-forming detection system fundamental diagram；
Fig. 3 is the utility model minitype polarization spectrum imaging method schematic diagram one；
Fig. 4 is the utility model minitype polarization spectrum imaging method schematic diagram two；
Reference numeral is in figure：The preposition optical systems of 1-, 2- pixelation polarizing diaphragms, 3- linear variable filters, 4- are big
Planar array detector component, 5- data handling systems.
Specific embodiment
The utility model is further described below in conjunction with drawings and the specific embodiments.
It will be seen from figure 1 that the present embodiment minitype polarization spectrum investigating system is inclined including preposition optical system 1, pixelation
Vibrating diaphragm piece 2, linear variable filter 3 and large area array detector assembly 4.Linear variable filter 3 is integrated in large area array detector
In front of 4 photosurface of component, before pixelation polarizing diaphragm 2 is integrated in linear variable filter 3, polarization state is carried out to light beam respectively and is obtained
It takes and narrow-band-filter.In other embodiments, pixelation polarizing diaphragm 2 and the position of linear variable filter 3 can exchange.Mesh
Reflected light is marked by preposition optical system 1, then pass sequentially through pixelation polarizing diaphragm 2 with after linear variable filter 3, in big face
Target picture is formed on array detector component 4.
Pixelation polarizing diaphragm 2 includes multiple polarization units, and each polarization unit includes the polarization of four kinds of different polarization states
Piece, the size of each polarizer correspond to detector pixel size, and four kinds of polarization states can be selected flexibly, and 0 is chosen in the present embodiment
Degree, 45 degree, 90 degree, 135 degree.Can also be chosen in other embodiment 0 degree, 45 degree, 90 degree, it is non-partially.
The spectrum gradual change direction of linear variable filter 3 is parallel with detector row or column, and linear variable filter 3 is mostly logical
Channel filter, the one or more polarization units of physical width covering of passage, the spectral coverage number that concrete foundation detection application needs come
The one or more polarization units of distribution.
The effect of preposition optical system 1 is that target is imaged, and specific implementation is varied.When observed object compared with
The mode of telescope combined imaging mirror can be used to realize when remote；When observed object apart from it is moderate when, telephotolens can be used
It realizes；When observed range is nearer, can be realized using imaging lens.
Data handling system 5 extracts analysis to the image information on large area array detector assembly 4, obtains target point
Polarization state information and spectral information.
The acquisition of polarization state information realizes especially by following steps, such as Fig. 3：
2.1st, the single wave band of target point, the gray value letter of single linear polarization in target scene image information are extracted
Breath, extraction result such as scheme b) shown in, for other linear polarization gray value informations of target point, by adjacent target point
Linear polarization gray value information carries out interpolation calculation acquisition, and such as figure is c) shown；
2.2nd, degree of polarization, each polarization parameter of the angle of polarization are calculated according to above-mentioned linear polarization gray value information；
According to linear polarization I0°(v)、I45°(v)、I90°(v)、I135°(v),、IR(v)、IL(v) etc., especially by following
Formula calculates degree of polarization, each polarization parameter of the angle of polarization：
I represents gross energy in above formula, and Q represents the energy difference of 0 ° and 90 ° linearly polarized light, and U represents 45 ° and 135 ° of linearly polarized lights
Energy difference, V represents the energy difference of left circularly polarized light and right-circularly polarized light, this four parameters are all to put down the time of luminous intensity
.Multiple indexs such as degree of polarization, the angle of polarization can be represented with above formula.
Such as the degree of polarization (Degree of Polarization, DOP) of polarised light
Linear polarization degree (Degree of Linear Polarization, DOLP) is represented by
Circular polarization (Degree of Circular Polarization, DOCP) is represented by
Phase angle AOP (Angle of Polarization) is polarized, it represents direction of vibration and its reference side of linearly polarized light
To angle, be represented by：
Ellipticity ε represents transverse and the ratio of short axle, is expressed as：
The acquisition of spectral information realizes especially by following steps, as shown in Figure 4：
Push-scanning image process realizes the space-time combined modulation of spectral information, and obtaining spectrum by space-time joint demodulation believes
Breath, process are as follows：It is assumed that target point A push away sweep during image in detector pixel A1~H1 successively, wherein A1 represents detection
The pixel unit that device line a the 1st arranges, H1 represents the pixel unit of the row of detector H rows the 1st, in order to extract the spectrum of target point A
Information takes the half-tone information of pixel A 1 in the first two field picture, takes the half-tone information of pixel B 1 in the second two field picture, and so on,
The spectral information of target point A can be obtained.
Claims (5)
1. a kind of minitype polarization light spectrum image-forming detection system, including preposition optical system (1) and large area array detector assembly (4),
It is characterized in that：Pixelation polarizing diaphragm (2) and linear variable filter (3) are further included, is respectively used to realize the polarization of light beam
Acquisition of information and narrow-band-filter；
The linear variable filter (3) is integrated in front of large area array detector assembly (4) photosurface, the pixelation polarizing coating
Piece (2) is integrated on linear variable filter (3)；
Or the pixelation polarizing diaphragm (2) is integrated in front of large area array detector assembly (4) photosurface, linear variable filter
(3) it is integrated on pixelation polarizing diaphragm (2)；
Target reflecting light passes through preposition optical system (1), then passes through pixelation polarizing diaphragm (2) and linear variable filter (3)
Afterwards, target picture is formed on large area array detector assembly (4).
2. a kind of minitype polarization light spectrum image-forming detection system according to claim 1, it is characterised in that：The pixelation is inclined
Vibrating diaphragm piece (2) includes multiple polarization units, and each polarization unit includes the polarizer of four kinds of different polarization states, each polarization unit
Size correspond to N*N Pixel Dimensions of detector, wherein N is the positive integer more than or equal to 2.
3. a kind of minitype polarization light spectrum image-forming detection system according to claim 2, it is characterised in that：Four kinds of differences
Polarization state can be combined as：0 degree, 45 degree, 90 degree, 135 degree or 0 degree, 45 degree, 90 degree, it is non-partially.
4. a kind of minitype polarization light spectrum image-forming detection system according to Claims 2 or 3, it is characterised in that：It is described linear
The one or more polarization units of physical width covering of gradual filter (3) passage；The spectrum of the linear variable filter (3)
Gradual change direction pushes away that sweep direction parallel with detector.
5. a kind of minitype polarization light spectrum image-forming detection system according to any one of claims 1 to 3, it is characterised in that：It is described
Preposition optical system (1) includes telephotolens group and imaging microscope group.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107741274A (en) * | 2017-10-19 | 2018-02-27 | 中国科学院西安光学精密机械研究所 | Micro polarization spectrum imaging detection system and method |
| CN114295207A (en) * | 2021-12-29 | 2022-04-08 | 烟台睿创微纳技术股份有限公司 | Uncooled hyperspectral imaging chip and hyperspectral imager |
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2017
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107741274A (en) * | 2017-10-19 | 2018-02-27 | 中国科学院西安光学精密机械研究所 | Micro polarization spectrum imaging detection system and method |
| CN107741274B (en) * | 2017-10-19 | 2023-12-08 | 中国科学院西安光学精密机械研究所 | Miniature polarization spectrum imaging detection system and method |
| CN114295207A (en) * | 2021-12-29 | 2022-04-08 | 烟台睿创微纳技术股份有限公司 | Uncooled hyperspectral imaging chip and hyperspectral imager |
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