CN108088564A - A kind of fast illuminated light field-polarization imager and imaging method - Google Patents
A kind of fast illuminated light field-polarization imager and imaging method Download PDFInfo
- Publication number
- CN108088564A CN108088564A CN201711350438.2A CN201711350438A CN108088564A CN 108088564 A CN108088564 A CN 108088564A CN 201711350438 A CN201711350438 A CN 201711350438A CN 108088564 A CN108088564 A CN 108088564A
- Authority
- CN
- China
- Prior art keywords
- polarization
- microlens array
- subgraph
- pixel
- depth
- 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.)
- Withdrawn
Links
- 238000003384 imaging method Methods 0.000 title claims abstract description 42
- 230000010287 polarization Effects 0.000 claims abstract description 67
- 238000012545 processing Methods 0.000 claims abstract description 35
- 238000003491 array Methods 0.000 claims abstract description 19
- 230000005855 radiation Effects 0.000 claims abstract description 4
- 238000001514 detection method Methods 0.000 claims description 6
- 230000010354 integration Effects 0.000 abstract description 7
- 238000010586 diagram Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 230000003287 optical effect Effects 0.000 description 4
- 101100234408 Danio rerio kif7 gene Proteins 0.000 description 3
- 101100221620 Drosophila melanogaster cos gene Proteins 0.000 description 3
- 101100398237 Xenopus tropicalis kif11 gene Proteins 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 241000581017 Oliva Species 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000002070 nanowire Substances 0.000 description 1
- 230000005622 photoelectricity Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J4/00—Measuring polarisation of light
- G01J4/04—Polarimeters using electric detection means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J4/00—Measuring polarisation of light
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/21—Polarisation-affecting properties
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J4/00—Measuring polarisation of light
- G01J4/02—Polarimeters of separated-field type; Polarimeters of half-shadow type
Abstract
The present invention proposes that a kind of fast illuminated light field polarization imager and imaging method, structure are：Object lens, field stop, collimating mirror, microlens array one, wave plate array, polarization chip arrays, microlens array two and the photodetector and Signal Processing Element set gradually along radiation direction；The light of object is converged to by object lens in field stop, reaches microlens array one by collimating mirror collimation；A series of subgraphs are generated using wave plate array and polarization chip arrays and on the back focal plane of microlens array one；The subgraph is imaged onto by microlens array two on photodetector and Signal Processing Element.On imaging method, the image and depth reconstruction of object are done respectively in the subregion of different wave length, and calculate its polarization；The present invention can obtain image, polarization and the depth four-dimensional information of object within time of integration of detector；Meanwhile the object depth by being averaged out wave band, the precision of object depth can be greatly improved.
Description
Technical field
The present invention relates to fast illuminated multiplanar imaging technical field, more particularly to a kind of fast illuminated light field-polarization imager and
Imaging method.
Background technology
Light in nature carries nine dimension information, including spatial information (x, y, z), propagation angleWavelength (λ),
Polarization angle and ellipticity (ψ, χ), and traditional imaging system only captures the space two-dimensional information (x, y) of light.Multidimensional into
As technology is a kind of space two-dimensional information that can not only obtain object, can also obtain other one or more dimensions information into
As technology, have a wide range of applications in the fields such as agricultural, astronomy, biological detection, environmental monitoring.In order to obtain the multidimensional of object
Information, most system is by the way of scanning at present.But this mode is not particularly suited for detection dynamic object.In order to solve
This problem, scholars propose the method for obtaining high dimensional information parallel using two-dimensional detector, and this technology is otherwise known as soon
Illuminated multiplanar imaging technology.
Fast illuminated polarization imaging technology is that one kind obtains target object image within time of integration of detector and polarization is believed
The imaging technique of breath.The polarization state of light can be represented that in practical applications, people more make by angle ψ and ellipticity χ
The polarization state of light is represented with Stokes vector：
S0=I
S1=Ip cos2 ψ cos2 χ
S2=Ip sin2 ψ cos2 χ
S3=Ip sin2 χ
[S in formula0, S1, S2, S3]TFor the Stokes vector of light；I is light intensity；P is degree of polarization.To obtain target parallel
The image and polarization information of object, Viktor Gruev et al. proposed a kind of polarization imaging based on nanometer line filter in 2010
Detector, the detector are that one layer of nano wire filter array is covered on traditional CCD, and each subfilter is equivalent to a piece of
Polarizer, and it is corresponding with the single pixel of CCD.There are four types of different subfilters, polarization direction difference in filter array
For 0 °, 45 °, 90 ° and 135 °.The panel detector structure is compact, but the technology only obtain it is inclined from the part of object light
It shakes information, i.e. [S in Stokes vector0, S1, S3]T.Similar technology also have Oliva propose based on double Wollaston ribs
The fast illuminated polarization imager based on light-field camera that the fast illuminated polarization imager of mirror, BrentD.Bartlett et al. are proposed
Etc..Different from above-mentioned technology, Kazuhiko Oka proposed a kind of using a series of birefringent prisms acquisition mesh in 2003
The image of object and the imaging technique of whole polarization informations are marked, but the technology is limited by influence of the dispersion to birefringent prism.
2012, birefringent prism was replaced with a pair of of polarization by Michael W.Kudenov et al. on the basis of Kazuhiko Oka
Grating eliminates influence of the dispersion to system.
Fast illuminated optical field imaging technology is a kind of imaging technique that can obtain target object image and depth information, mainly
It is divided into two kinds of non-focusing type and focus type.Non-focusing type optical field imaging technology was put forward for the first time in 1992 by Adelson et al., this
Afterwards, Ng et al. was improved to portable light-field camera in 2006.Its principle be by object lens by object be imaged to one it is micro-
Lens array, the light focused on after microlens array disperse and are received by a detector again.The original graph that detector obtains
Not only the spatial information (x, y) comprising object also includes the angle information of incident ray as inTherefore can be arranged
Arrange into a four-matrixThe image of object and depth information (x, y, z) are can obtain using processing.It is poly-
Burnt type optical field imaging technology is to be put forward for the first time by Lumsdaine and Georgiev in 2009.The principle of the technology is first by object
Object is imaged to an intermediate image plane by mirror, and then the intermediary image is imaged to detector by a microlens array again.By
It is different to the visual angle of certain point on intermediary image in each sub-lens, there is " parallax " between corresponding subgraph, by this " depending on
The size of difference " can obtain the relative depth of the point.Conjugate point of the every bit in each subgraph on intermediary image is eventually found, and is taken
Light intensity value of the average value of its pixel value as the point, you can the target object image rebuild.
With the development of imaging technique, polarization imaging technology and 3D optical field imagings technology are known in micro-imaging, remote sensing, face
Not Deng fields be widely used.Meanwhile imaging technique is proposed in fields such as biomedical and machine vision and is being detected
The requirement of target object image, polarization and depth four-dimensional information is obtained in time of integration of device.
The content of the invention
In order to meet requirement of the biomedical and field of machine vision to imaging technique, the present invention proposes a kind of snapshot
Formula light field-polarization imager and imaging method, the present invention can be obtained within time of integration of detector object image,
Polarization and depth four-dimensional information.
A kind of fast illuminated light field-polarization imager, including：It is the object lens 1 that are set gradually along radiation direction, field stop 2, accurate
At straight mirror 3, microlens array 1, wave plate array 5, polarization chip arrays 6, microlens array 27 and photodetector and signal
Manage component 8；
The light of object first passes around object lens 1 and converges in field stop 2, reaches lenticule by the collimation of collimating mirror 3
Array 1；A series of subgraphs are generated using wave plate array 5 and polarization chip arrays 6 and on the back focal plane of microlens array 1
Picture；The subgraph is imaged onto by microlens array 27 on photodetector and Signal Processing Element 8.
A kind of imaging method of fast illuminated light field-polarization imager, suitable for fast illuminated light field described above-polarize
As instrument, the original image that photodetector and Signal Processing Element obtain is divided into 2 × 2 according to microlens array one first
Subregion, the polarization state of all subregion light is by the modulation of wave plate array and polarization chip arrays corresponding region, photodetector
And the light intensity that Signal Processing Element obtains carries modulated object polarization information, original image is demodulated to be obtained
The polarized light field image of object；Then in every sub-regions, using between the algorithm calculating adjacent sub-images of correlation distance
Parallax, and the reconstruction image of target depth and object is obtained according to the parallax；Finally by the image of object, polarization with
And depth information is combined into a 4 D data cube.Specially：
The original image that photodetector and Signal Processing Element obtain is divided into 2 according to the correspondence of microlens array one ×
2 subregions；
According to correlation distance algorithm in every sub-regions of photodetector and Signal Processing Element, photodetection is calculated
Parallax on device and Signal Processing Element between each adjacent sub-images；
According to the parallax between each adjacent sub-images, pixel on each intermediate subgraph is calculated to microlens array two
The distance between；
According to the distance between pixel on each intermediate subgraph to microlens array two, object depth is calculated
Figure；
According to the distance between pixel on each intermediate subgraph to microlens array two, each centre of object is calculated
The reconstruction image of subgraph；
The reconstruction image of all subregions is demodulated, obtains representing four Stokes point of object polarization information
Spirogram picture；
Combining target object depth map obtains target object image, polarization and depth and is combined into 4 D data cube.
In the imaging method of the fast illuminated light field-polarization imager, pixel on each intermediate subgraph is to micro-
Relation between the distance between lens array two and object depth is obtained by calibrating mode.
In the imaging method of the fast illuminated light field-polarization imager, according to the pixel on each intermediate subgraph to micro-
Object depth map is calculated in the distance between lens array two, is specially：According to the pixel on each intermediate subgraph to micro-
The distance between lens array two obtains the depth image of each wave band, and the average image of the depth image of all wave bands is final
The depth map of object.
In the imaging method of the fast illuminated light field-polarization imager, according to the pixel on each intermediate subgraph to micro-
The reconstruction image of object is calculated in the distance between lens array two, is specially：It is arrived according to pixel on each intermediate subgraph
The distance of microlens array two, the pixel obtained on each intermediate subgraph are multiple on photodetector and Signal Processing Element
The detection light intensity of the corresponding multiple points of each pixel is calculated average value, obtains the light of each pixel by the position of corresponding points
Intensity values, and then obtain the reconstruction image of each intermediate subgraph.
The difference of the present invention and the prior art are, in the structure of light field-polarization imager, in photodetector and letter
It is provided with two panels microlens array, wave plate array and polarization chip arrays before number processing component, wherein microlens array one, a piece of
Wave plate array and a piece of polarization chip arrays can obtain modulated multiple polarization subgraphs, microlens array two to each subgraph again
Secondary imaging, final photodetector and Signal Processing Element can obtain the image, polarization and field information of object；In imaging side
In method, the image and depth reconstruction of object are done respectively in the subregion divided according to microlens array one, and will be all
Depth of the mean depth of subregion as final goal object, is then demodulated reconstruction image, obtains the polarization of object
Image, last combining target object depth degree obtain including the 4 D data cube of target object image, polarization and depth information；
Advantageous effect possessed by more than difference is：Firstth, system can obtain within time of integration of detector
Image, polarization and the depth four-dimensional information of object；It secondth, can be with by being averaged out the object depth of subregion
The precision of object depth is greatly improved, reduces the noise of depth image.
Description of the drawings
It, below will be to embodiment or the prior art in order to illustrate more clearly of technical solution of the invention or of the prior art
Attached drawing is briefly described needed in description, it should be apparent that, the accompanying drawings in the following description is only in the present invention
Some embodiments recorded, for those of ordinary skill in the art, without creative efforts, can be with
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is the structure diagram of the fast illuminated light field-polarization imager of the present invention；
Fig. 2 is the stereoscopic schematic diagram of the fast illuminated light field-polarization imager of the present invention；
Fig. 3 is adjacent sub-images schematic diagram on photodetector in the embodiment of the present invention one and Signal Processing Element；
Fig. 4 is wave plate array and the polarization fast axle of chip arrays and polarization direction schematic diagram；
Fig. 5 is the part-structure schematic diagram of two fast illuminated light field-polarization imager of the embodiment of the present invention；
Adjacent sub-images schematic diagram on photodetector and Signal Processing Element in Fig. 6 embodiment of the present invention two.
Specific embodiment
In order to which those skilled in the art is made to more fully understand the technical solution in the embodiment of the present invention, and make the present invention's
Above-mentioned purpose, feature and advantage can be more obvious understandable, technical solution in the present invention made below in conjunction with the accompanying drawings further detailed
Thin explanation.
In order to meet requirement of the biomedical and field of machine vision to imaging technique, the present invention proposes a kind of snapshot
Formula light field-polarization imager and imaging method, the present invention can be obtained within time of integration of detector object image,
Polarization and depth four-dimensional information.
A kind of fast illuminated light field-polarization imager, as shown in Figure 1, including：The object lens 1 that are set gradually along radiation direction regard
Field diaphragm 2, collimating mirror 3, microlens array 1, wave plate array 5, polarization chip arrays 6, microlens array 27 and photodetection
Device and Signal Processing Element 8；
The light of object first passes around object lens 1 and converges in field stop 2, reaches lenticule by the collimation of collimating mirror 3
Array 1；A series of subgraphs are generated using wave plate array 5 and polarization chip arrays 6 and on the back focal plane of microlens array 1
Picture；The subgraph is imaged onto by microlens array 27 on photodetector and Signal Processing Element 8.
A kind of imaging method of fast illuminated light field-polarization imager, suitable for fast illuminated light field described above-polarize
As instrument, the original image that photodetector and Signal Processing Element obtain is divided into 2 × 2 according to microlens array one first
Subregion, the polarization state of all subregion light is by the modulation of wave plate array and polarization chip arrays corresponding region, photodetector
And the light intensity that Signal Processing Element obtains carries modulated object polarization information, original image is demodulated to be obtained
The polarized light field image of object；Then in every sub-regions, using between the algorithm calculating adjacent sub-images of correlation distance
Parallax, and the reconstruction image of target depth and object is obtained according to the parallax；Finally by the image of object, polarization with
And depth information is combined into a 4 D data cube.Specially：
The original image that photodetector and Signal Processing Element obtain is divided into 2 according to the correspondence of microlens array one ×
2 subregions；All subregion image is the light field image after wave plate array and polarizer array modulation；
According to correlation distance algorithm in every sub-regions of photodetector and Signal Processing Element, photodetection is calculated
Parallax on device and Signal Processing Element between each adjacent sub-images；
According to the parallax between each adjacent sub-images, pixel on each intermediate subgraph is calculated to microlens array two
The distance between；
According to the distance between pixel on each intermediate subgraph to microlens array two, object depth is calculated
Figure；
According to the distance between pixel on each intermediate subgraph to microlens array two, each centre of object is calculated
The reconstruction image of subgraph；
The reconstruction image of all subregions is demodulated, obtains representing four Stokes point of object polarization information
Spirogram picture；
Combining target object depth map obtains target object image, polarization and depth and is combined into 4 D data cube.
In the imaging method of the fast illuminated light field-polarization imager, pixel on each intermediate subgraph is to micro-
Relation between the distance between lens array two and object depth is obtained by calibrating mode.
In the imaging method of the fast illuminated light field-polarization imager, according to the pixel on each intermediate subgraph to micro-
Object depth map is calculated in the distance between lens array two, is specially：According to the pixel on each intermediate subgraph to micro-
The distance between lens array two obtains the depth image of each wave band, and the average image of the depth image of all wave bands is final
The depth map of object.
In the imaging method of the fast illuminated light field-polarization imager, according to the pixel on each intermediate subgraph to micro-
The reconstruction image of object is calculated in the distance between lens array two, is specially：It is arrived according to pixel on each intermediate subgraph
The distance of microlens array two, the pixel obtained on each intermediate subgraph are multiple on photodetector and Signal Processing Element
The detection light intensity of the corresponding multiple points of each pixel is calculated average value, obtains the light of each pixel by the position of corresponding points
Intensity values, and then obtain the reconstruction image of each intermediate subgraph.
To be best understood from the method for the present invention, embodiment is further illustrated with reference to attached drawing.
As shown in Fig. 2, be the stereoscopic schematic diagram of illuminated light field-polarization imager of the invention fast, the light from object
It is converged in by object lens 21 in field stop 22, reaches microlens array 1 using collimating mirror 23.Microlens array 1
Sub-lens number for 2 × 2, by the light of collimation through microlens array 1, wave plate array 25 and the inclined array 26 of polarization
The intermediate subgraph identical by 2 × 2 profiles are pooled at the back focal plane of microlens array 1 afterwards.
Each intermediate subgraph is imaged by microlens array 2 27 to photodetector and Signal Processing Element 28.Due to micro-
Visual angle is different when different sub-lens are imaged intermediate subgraph in lens array 2 27, will be generated between corresponding subgraph different
Parallax.Intermediate subgraph can be calculated to 2 27 distance of microlens array by the parallax, then distance projection is empty to object
Between can obtain the depth of object.
The process of object depth acquisition is discussed in detail by taking object point O in Fig. 1 as an example below.As shown in Figure 1, go out from object point O
The light of hair is focused on by object lens 1 in field stop 2, forms intermediate picture point O1.Hereafter light by collimating mirror 3 collimation after by
Microlens array 1 focuses on 2 × 2 sub- picture points in centre.As shown in Figure 1, take sub- picture point O among one of2Exemplified by, light
It is imaged onto by microlens array 27 on photodetector and Signal Processing Element 8.M1、M2And M3For two centering of microlens array
Between sub- picture point O2Into three subgraphs.As shown in figure 3, to calculate M1And M2Between parallax, first by two subgraph centers pair
Standard, then parallax D is to O in two subgraphs2Into the distance between picture point.According to geometrical relationship, can obtain：
In formula, B is microlens array 27 and the distance between photodetector and Signal Processing Element 8；D is lenticule
The distance between adjacent sub-lens in array 27.Above formula is simplified to obtain：
Relation between the depth w and a of object can be obtained by the mode calibrated.Using a point light source as target
Intermediate sub- picture point is calculated to the distance between microlens array 27 a by method proposed by the present invention in object, and transfer point
Light source carries out n times measurement in measurement range, obtains results setMeanwhile the point is obtained by traditional measurement method
Light source arrives the distance between systemAssuming that operation relation between w and a is represented by w=f (a), then the operation relation
It can be obtained by Least Square Method：
In formula, χ is the measurement range of system.More than calculating process is performed to each intermediate subgraph, each ripple can be obtained
The depth image of sectionThe polarization information of object and depth information are mutual indepedent, i.e., each intermediate subgraph corresponds to
Depth image be consistent.Using the average image of all depth maps as the depth image of final goal object, i.e.,：
According to pixel on each intermediate subgraph to the distance of microlens array 27, the pixel can be obtained and visited in photoelectricity
Survey the position of corresponding points on device and Signal Processing Element 8.Due to the compound eye imaging characteristic of microlens array, the picture on intermediate subgraph
Vegetarian refreshments can find multiple corresponding points on the detector.The detection light intensity of these corresponding points is averaged, the light as the pixel
Intensity values.This operation is performed to each pixel on intermediate subgraph, you can obtain the reconstruction image of each intermediate subgraph
As shown in figure 4, be wave plate array and the polarization fast axle of chip arrays and polarization direction schematic diagram, wave plate array 5 by
Two panels quarter wave plate forms, and fast axis direction is respectively with respect to the horizontal direction of 0 ° and 45 °, and polarization chip arrays 6 are by two panels polarizer
Composition, polarization direction are respectively with respect to the horizontal direction of 0 ° and 45 °.By wave plate array 5 and the Muller matrix of polarization chip arrays 6
It is denoted as respectivelyWithThen：
The situation that object is point light source is first only considered, with reference to shown in Fig. 4 between wave plate array 5 and polarization chip arrays 6
Position relationship, it can be deduced that the stokes component after two devices is passed through by the light that point light source is sent：
[S in formula0, S1, S2, S3]TFor the Stokes vector from point-source light ray.By wave plate array 5 and polarizer battle array
The Muller matrix of row 6WithAbove formula is substituted into, can be obtained：
Each stokes component image of object is denoted as IS0, IS1, IS3, IS4, each Stokes point can be obtained according to above formula
Spirogram picture and intermediate subgraphRelation be：
Each stokes component image of object can finally be obtained：
In conjunction with the depth map being previously obtained, you can obtain comprising target object image, polarization and depth four-dimensional information
Data cube.
The present invention also provides another specific embodiments two：
The difference of the present embodiment and specific embodiment one is, as shown in figure 5, the centre that the microlens array one is presented
Subgraph is located at after microlens array 2 57.Under the specific embodiment, M1And M2Between parallax it is as shown in Figure 6.According to geometry
Relation, we can obtain：
In formula, B is microlens array 27 and the distance between photodetector and Signal Processing Element 8；D is lenticule
The distance between adjacent sub-lens in array 27.Above formula is simplified to obtain：
The calculation of subsequent step can refer to embodiment one and realize.
The difference of the present invention and the prior art are, in the structure of light field-polarization imager, in photodetector and letter
It is provided with two panels microlens array, wave plate array and polarization chip arrays before number processing component, wherein microlens array one, a piece of
Wave plate array and a piece of polarization chip arrays can obtain modulated multiple polarization subgraphs, microlens array two to each subgraph again
Secondary imaging, final photodetector and Signal Processing Element can obtain the image, polarization and field information of object；In imaging side
In method, the image and depth reconstruction of object are done respectively in the subregion divided according to microlens array one, and will be all
Depth of the mean depth of subregion as final goal object, is then demodulated reconstruction image, obtains the polarization of object
Image, last combining target object depth degree obtain including the 4 D data cube of target object image, polarization and depth information；
Advantageous effect possessed by more than difference is：Firstth, system can obtain within time of integration of detector
Image, polarization and the depth four-dimensional information of object；It secondth, can be with by being averaged out the object depth of subregion
The precision of object depth is greatly improved, reduces the noise of depth image.
Each embodiment in this specification is described by the way of progressive, identical similar portion between each embodiment
Point just to refer each other, and the highlights of each of the examples are difference from other examples.
Although depicting the present invention by embodiment, it will be appreciated by the skilled addressee that the present invention there are many deformation and
Change the spirit without departing from the present invention, it is desirable to which appended claim includes these deformations and changes without departing from the present invention's
Spirit.
Claims (5)
1. a kind of fast illuminated light field-polarization imager, which is characterized in that including：The object lens (1) that are set gradually along radiation direction,
Field stop (2), collimating mirror (3), microlens array one (4), wave plate array (5), polarization chip arrays (6), microlens array two
(7) and photodetector and Signal Processing Element (8)；
The light of object first passes around object lens (1) and converges in field stop (2), reaches micro- by collimating mirror (3) collimation
Lens array one (4)；It generates using wave plate array (5) and polarization chip arrays (6) and on the back focal plane of microlens array one (4)
A series of subgraphs；The subgraph is imaged onto photodetector and Signal Processing Element (8) by microlens array two (7)
On.
It is 2. a kind of in the fast illuminated light field-polarization imager realized described in claim 1 on fast illuminated light field-polarization imager
Imaging method, which is characterized in that comprise the following steps：
The original image that photodetector and Signal Processing Element obtain is divided into 2 × 2 sons according to the correspondence of microlens array one
Region；
According to correlation distance algorithm in every sub-regions of photodetector and Signal Processing Element, calculate photodetector and
Parallax on Signal Processing Element between each adjacent sub-images；
According to the parallax between each adjacent sub-images, the pixel on each intermediate subgraph is calculated between microlens array two
Distance；
According to the distance between pixel on each intermediate subgraph to microlens array two, object depth map is calculated；
According to the distance between pixel on each intermediate subgraph to microlens array two, each intermediate subgraph of object is calculated
Reconstruction image；
The reconstruction image of all subregions is demodulated, obtains representing four stokes component figures of object polarization information
Picture；
Combining target object depth map obtains target object image, polarization and depth and is combined into 4 D data cube.
3. the imaging method of fast illuminated light field-polarization imager as claimed in claim 2, which is characterized in that each centre
The relation of pixel on subgraph to the distance between microlens array two between object depth is obtained by calibrating mode.
4. the imaging method of fast illuminated light field-polarization imager as claimed in claim 3, which is characterized in that according to each centre
Pixel on subgraph is calculated object depth map, is specially the distance between to microlens array two：According to each centre
Pixel on subgraph obtains the depth image of each wave band, the depth map of all wave bands the distance between to microlens array two
The average image of picture is the depth map of final goal object.
5. the imaging method of fast illuminated light field-polarization imager as claimed in claim 2, which is characterized in that according to each centre
Pixel on subgraph is calculated the reconstruction image of object, is specially the distance between to microlens array two：According to each
Pixel obtains the pixel on each intermediate subgraph in photodetector and letter to the distance of microlens array two on intermediate subgraph
The position of multiple corresponding points in number processing component calculates the detection light intensity of the corresponding multiple points of each pixel average
Value, obtains the light intensity value of each pixel, and then obtains the reconstruction image of each intermediate subgraph.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711350438.2A CN108088564A (en) | 2017-12-15 | 2017-12-15 | A kind of fast illuminated light field-polarization imager and imaging method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711350438.2A CN108088564A (en) | 2017-12-15 | 2017-12-15 | A kind of fast illuminated light field-polarization imager and imaging method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108088564A true CN108088564A (en) | 2018-05-29 |
Family
ID=62176476
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711350438.2A Withdrawn CN108088564A (en) | 2017-12-15 | 2017-12-15 | A kind of fast illuminated light field-polarization imager and imaging method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108088564A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110133865A (en) * | 2019-04-18 | 2019-08-16 | 深圳市麓邦技术有限公司 | Imaging direction selects device and method thereof |
| CN110631705A (en) * | 2019-09-17 | 2019-12-31 | 哈尔滨理工大学 | Method and device for carrying out real-time Stokes polarization measurement by using DMD |
| WO2020066738A1 (en) * | 2018-09-26 | 2020-04-02 | 日本電信電話株式会社 | Polarization imaging system |
| CN111351790A (en) * | 2020-04-24 | 2020-06-30 | 上海御微半导体技术有限公司 | Defect detection device |
| CN111856770A (en) * | 2019-04-26 | 2020-10-30 | 曹毓 | Polarization imaging equipment |
| CN112240801A (en) * | 2020-10-13 | 2021-01-19 | 中国科学院长春光学精密机械与物理研究所 | Polarization imaging system |
| CN112924028A (en) * | 2021-01-25 | 2021-06-08 | 长春理工大学 | Light field polarization imaging detection system for sea surface oil spill |
| US20210333150A1 (en) * | 2020-04-24 | 2021-10-28 | Facebook Technologies, Llc | Polarimetric imaging camera |
| CN114166348A (en) * | 2021-12-16 | 2022-03-11 | 中国科学院光电技术研究所 | Rapid polarization imaging method based on full Stokes vector |
| WO2023055549A1 (en) * | 2021-09-28 | 2023-04-06 | Corning Incorporated | System and method for imaging with a pixelated metasurface waveplate and a uniform polarizer |
| US11756978B2 (en) | 2021-02-24 | 2023-09-12 | Meta Platforms Technologies, Llc | Multi-spectral image sensor |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102768410A (en) * | 2012-07-26 | 2012-11-07 | 李志扬 | Coherent three-dimensional display device based on optical wave-front reconstruction |
| US20130120356A1 (en) * | 2010-03-03 | 2013-05-16 | Todor G. Georgiev | Methods, Apparatus, and Computer-Readable Storage Media for Depth-Based Rendering of Focused Plenoptic Camera Data |
| CN107271039A (en) * | 2017-07-13 | 2017-10-20 | 西安交通大学 | Compact miniature fast illuminated spectral imaging detecting device and detection method |
-
2017
- 2017-12-15 CN CN201711350438.2A patent/CN108088564A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130120356A1 (en) * | 2010-03-03 | 2013-05-16 | Todor G. Georgiev | Methods, Apparatus, and Computer-Readable Storage Media for Depth-Based Rendering of Focused Plenoptic Camera Data |
| CN102768410A (en) * | 2012-07-26 | 2012-11-07 | 李志扬 | Coherent three-dimensional display device based on optical wave-front reconstruction |
| CN107271039A (en) * | 2017-07-13 | 2017-10-20 | 西安交通大学 | Compact miniature fast illuminated spectral imaging detecting device and detection method |
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020066738A1 (en) * | 2018-09-26 | 2020-04-02 | 日本電信電話株式会社 | Polarization imaging system |
| JP2020051868A (en) * | 2018-09-26 | 2020-04-02 | 日本電信電話株式会社 | Polarization image capturing system |
| CN110133865B (en) * | 2019-04-18 | 2021-03-26 | 深圳市麓邦技术有限公司 | Imaging direction selecting apparatus and method thereof |
| CN110133865A (en) * | 2019-04-18 | 2019-08-16 | 深圳市麓邦技术有限公司 | Imaging direction selects device and method thereof |
| CN111856770A (en) * | 2019-04-26 | 2020-10-30 | 曹毓 | Polarization imaging equipment |
| CN110631705A (en) * | 2019-09-17 | 2019-12-31 | 哈尔滨理工大学 | Method and device for carrying out real-time Stokes polarization measurement by using DMD |
| CN110631705B (en) * | 2019-09-17 | 2021-04-20 | 哈尔滨理工大学 | Method and device for carrying out real-time Stokes polarization measurement by using DMD |
| CN111351790A (en) * | 2020-04-24 | 2020-06-30 | 上海御微半导体技术有限公司 | Defect detection device |
| CN111351790B (en) * | 2020-04-24 | 2021-09-14 | 上海御微半导体技术有限公司 | Defect detection device |
| US20210333150A1 (en) * | 2020-04-24 | 2021-10-28 | Facebook Technologies, Llc | Polarimetric imaging camera |
| WO2021217103A1 (en) * | 2020-04-24 | 2021-10-28 | Facebook Technologies, Llc | Polarimetric imaging camera |
| US11781913B2 (en) * | 2020-04-24 | 2023-10-10 | Meta Platforms Technologies, Llc | Polarimetric imaging camera |
| CN112240801A (en) * | 2020-10-13 | 2021-01-19 | 中国科学院长春光学精密机械与物理研究所 | Polarization imaging system |
| CN112924028A (en) * | 2021-01-25 | 2021-06-08 | 长春理工大学 | Light field polarization imaging detection system for sea surface oil spill |
| CN112924028B (en) * | 2021-01-25 | 2023-11-07 | 长春理工大学 | Light field polarization imaging detection system for sea surface oil spill |
| US11756978B2 (en) | 2021-02-24 | 2023-09-12 | Meta Platforms Technologies, Llc | Multi-spectral image sensor |
| WO2023055549A1 (en) * | 2021-09-28 | 2023-04-06 | Corning Incorporated | System and method for imaging with a pixelated metasurface waveplate and a uniform polarizer |
| CN114166348A (en) * | 2021-12-16 | 2022-03-11 | 中国科学院光电技术研究所 | Rapid polarization imaging method based on full Stokes vector |
| CN114166348B (en) * | 2021-12-16 | 2023-09-19 | 中国科学院光电技术研究所 | Rapid polarization imaging method based on full Stokes vector |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108088564A (en) | A kind of fast illuminated light field-polarization imager and imaging method | |
| CN108107003A (en) | Fast illuminated light field-polarization imager and imaging method based on microlens array | |
| US11272161B2 (en) | System and methods for calibration of an array camera | |
| US10001369B2 (en) | Object-point three-dimensional measuring system using multi-camera array, and measuring method | |
| KR101701527B1 (en) | Three-dimensional image capture device | |
| US9843788B2 (en) | RGB-D imaging system and method using ultrasonic depth sensing | |
| US10783652B2 (en) | Plenoptic imaging apparatus, method, and applications | |
| CN106872037B (en) | Fast illuminated compact optical field imaging full-polarization spectrum detection device and method | |
| CN104363369B (en) | The image recovery method and device of a kind of light-field camera | |
| CN107271039A (en) | Compact miniature fast illuminated spectral imaging detecting device and detection method | |
| CN108088561A (en) | A kind of fast illuminated light field-optical spectrum imagers and imaging method | |
| US20190174115A1 (en) | Light field data representation | |
| CN103592808A (en) | Compact polarization imaging camera wide in field of view | |
| CN106802184A (en) | The fast compact noise immunity type optical field imaging full-polarization spectrum detection device of illuminated and method | |
| CN108805921A (en) | Image-taking system and method | |
| Zhang et al. | Virtual image array generated by Risley prisms for three-dimensional imaging | |
| JPWO2020071253A1 (en) | Imaging device | |
| WO2017120640A1 (en) | Image sensor | |
| RU2790049C1 (en) | Method for anisotropic recording of the light field and apparatus for implementation thereof | |
| CN117395485A (en) | Integrated polarized light field depth perception imaging device and method adopting same | |
| CN111006766A (en) | Portable snapshot type array polarization multispectral imager and imaging method | |
| Su et al. | A Light Field Imaging Polarimeter Using A Division of Focal-Plane Device | |
| Yamada et al. | Small Capturing system of Three-dimensional image Using Compound Optics | |
| Yamada et al. | Small 3D image capturing system by TOMBO | |
| Phillips et al. | Optical registration array for imaging polarimeters |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20180529 |