CN106052868A - Staring multispectral imaging method - Google Patents
Staring multispectral imaging method Download PDFInfo
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- CN106052868A CN106052868A CN201610322147.1A CN201610322147A CN106052868A CN 106052868 A CN106052868 A CN 106052868A CN 201610322147 A CN201610322147 A CN 201610322147A CN 106052868 A CN106052868 A CN 106052868A
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- dispersion element
- detector
- imaging system
- optical imaging
- dispersion
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- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000000701 chemical imaging Methods 0.000 title claims abstract description 12
- 239000006185 dispersion Substances 0.000 claims abstract description 69
- 238000012634 optical imaging Methods 0.000 claims abstract description 19
- 238000003384 imaging method Methods 0.000 claims abstract description 14
- 230000003287 optical effect Effects 0.000 claims abstract description 5
- 238000001228 spectrum Methods 0.000 claims description 33
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 230000000007 visual effect Effects 0.000 description 8
- 230000003595 spectral effect Effects 0.000 description 5
- 238000001514 detection method Methods 0.000 description 4
- 238000004611 spectroscopical analysis Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000010408 sweeping Methods 0.000 description 3
- 238000000605 extraction Methods 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 238000003491 array Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000012795 verification 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
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/28—Investigating the spectrum
- G01J3/2823—Imaging spectrometer
-
- 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
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/02—Details
- G01J3/0202—Mechanical elements; Supports for optical elements
-
- 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
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/28—Investigating the spectrum
- G01J3/2803—Investigating the spectrum using photoelectric array detector
-
- 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
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/28—Investigating the spectrum
- G01J3/2823—Imaging spectrometer
- G01J2003/2826—Multispectral imaging, e.g. filter imaging
Landscapes
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- General Physics & Mathematics (AREA)
- Spectrometry And Color Measurement (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The invention provides a staring multispectral imaging method which includes: an optic imaging system, a dispersion element, a drive apparatus and a detector; the optic imaging system has an optical axis which is separately perpendicular to a surface of the dispersion element and a pixel surface of the detector; the dispersion element is arranged between the optical imaging system and the detector; the drive apparatus drives the dispersion element to move along one direction. Through the mobile dispersion element, the method can acquire a multispectral image under a fixed field of view, so that production cost is saved and structure complexity is reduced.
Description
Technical field
The present invention relates to light spectrum image-forming field, in particular to a kind of gazing type multispectral imaging method.
Background technology
Spectral imaging technology possesses detecting light spectrum and the ability of spatial information simultaneously, is widely used in verification retrieval, food
The various fields such as product examine survey, precision agriculture, resource detection, camouflage identification, biologic medical.Light spectrum image-forming mainly pushes away the type of sweeping and coagulates
Depending on two kinds of imaging modes of type.Conventionally employed prism, grating are as the spectral imaging technology of beam splitter and push away the type of sweeping, and utilize narrow
Seam limits visual field, through prism, grating dispersion, is disposably projected on detector focal plane by the slit image of each wave band.Push away
Sweep type light spectrum image-forming to need to obtain complete data cube by the movement of platform or detection target.Therefore, possess at self
Push away more use on platforms such as sweeping the satellite of motion, aircraft.But, push away and sweep type light spectrum image-forming mode in some occasion discomfort
With, in such as operation process, system entire scan produces interference to the doctor in charge, now needs to use gazing type multispectral imaging
System.
But, current gazing type multi-optical spectrum imaging system uses acousto-optic tunable filter (Acousto Optic
Tunable Filter, AOTF) or liquid crystal tunable filter (Liquid Crystal Tunable Filter, LCTF) etc.
Tunable filter part, utilizes light spectrum image-forming wavelength band that this type of method implements and wave band number limited, and resolution is relatively low, and knot
Structure is complicated, relatively costly.
Summary of the invention
It is an object of the invention to provide a kind of gazing type multispectral imaging method, it is possible to realize high spectral resolution and wide ripple
The light spectrum image-forming of segment limit.
The embodiment of the present invention provides a kind of gazing type multispectral imaging method, including: optical imaging system 4, dispersion element
2, driving means 3 and detector 1；The optical axis of described optical imaging system 4 be respectively perpendicular to described dispersion element 2 surface and
The pixel surface of described detector 1；Described dispersion element 2 is between described optical imaging system 4 and described detector 1；Institute
Stating driving means 3 drives described dispersion element 2 to move in one direction.By mobile dispersion element, it is possible to obtain fixing visual field
Under multispectral image, thus saved production cost, reduced structure complexity.
Accompanying drawing explanation
Fig. 1 is the structural representation of the multi-optical spectrum imaging system of the gazing type multispectral imaging method using the embodiment of the present invention
Figure；
Fig. 2 is the schematic diagram that the embodiment of the present invention obtains gazing type multispectral image.
Detailed description of the invention
Below in conjunction with 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 describes.Based on embodiments of the invention, the institute that those of ordinary skill in the art are obtained under not having creative work premise
There are other embodiments, belong to protection scope of the present invention.
Fig. 1 is the structural representation of the multi-optical spectrum imaging system of the gazing type multispectral imaging method using the embodiment of the present invention
Figure.As it is shown in figure 1, this multi-optical spectrum imaging system specifically includes that
Optical imaging system 4, dispersion element 2, driving means 3 and detector 1.
It should be noted that dispersion element 2 and driving means 3 are properly termed as dispersion spectrophotometric unit, dispersion spectrophotometric unit can
To be integrated in optical imaging system 4, as a part for optical imaging system 4；It is also used as single parts, with optics
Imaging system 4 is provided separately.
Described optical imaging system 4 includes all optical systems being capable of observed object imaging, such as microscope,
Photographing unit etc..
Dispersion element 2 is split for realizing the spectrum to target object, and dispersion element 2 can be such as that wavelength gradual change filters
Sheet, multispectral optical filter etc..
Driving means 3 drives dispersion element 2 in the plane on pixel surface being parallel to detector 1, and edge is perpendicular to detection
The direction of device pixel array is moved.
Further, it should be noted that dispersion element 2 does not require consistent with the size of detection image planes, dispersion element 2 edge
Length L1 of moving direction can be equal in length L2 being perpendicular to pixel array direction with detector pixel array, it is also possible to no
Deng.
The move mode of dispersion element 2 can be such as: the left hand edge of dispersion element 2 is from the pixel surface of detector 1
One end enters, and the other end removal from the pixel surface of detector 1, i.e. the high order end of dispersion element 2 enters detector 1 at first
Pixel array region, under the drive of driving means 3, progresses into the pixel array region of detector 1 with certain speed, followed by
Continuous advance, until the pixel array region of the low order end removal detector of dispersion element 2.
Certainly, dispersion element can also use move mode from top to bottom, as long as moving direction is perpendicular to detector picture
Unit row or column to.
Wherein, the surface of dispersion element 2 is parallel to the focal plane of optical imaging system.
Detector 1 for obtaining and record multispectral image information by photoelectric effect, detector 1 can be such as CCD,
CMOS etc..
The pixel array received of described detector 1 is through the spectrum of dispersion element 2, it is thus achieved that the bands of a spectrum energy after spectrum segmentation
Amount.
Image in the pixel surface of detector 1 from the light of optical imaging system 4 outgoing through dispersion element 2, thus visit
The different pixel arrays surveying device 1 obtain different spectral image information, when whole dispersion element 2 is from the one of detector 1 pixel surface
Side enters, and during opposite side removal, detector 1 is obtained with each bands of a spectrum image under same visual field, thus obtains solid
Determine the multispectral image under visual field.
Each bands of a spectrum image under same visual field is known as the complete data cube of fixing visual field, now, no
Only have the information of image, also include segmenting in spectrum dimension, the spectroscopic data of every bit on image can be obtained, can obtain again and appoint
The image information of one spectral coverage.
It should be noted that dispersion element reversely movement can obtain the spectral image information of future time.Therefore, pass through
Dispersion element is one-dimensional to be moved back and forth, and obtains the spectroscopic data cube under different time.
Below the working method of the multi-optical spectrum imaging system that the embodiment of the present invention provides is described in detail:
The relative position of step 1, fixing optical imaging system and detector so that through the light congruence of optical imaging system
Gather at the focal plane of detector, to obtain target object image clearly at detector surface；
Step 2, determines the spectrum (λ of dispersion element surface various locationi), this step can realize by demarcating test,
Concrete scaling method can be:
Spectrophotometer sends monochromatic light, impinges perpendicularly on dispersion element surface, and the light measuring hot spot irradiation position is set a song to music
Line, demarcates centre wavelength (λ with micrometeri) the corresponding hot spot point of irradiation position on dispersion element.
As in figure 2 it is shown, the various location on dispersion element surface has different spectrum i.e. wavelength division, such as λ0-
λn, each spectrum is at for example, 0.05mm of the width occupied by dispersion element surface.
Step 3, is placed in dispersion element in a plane on parallel detector pixel surface, and this plane is positioned at described optics
In the image planes of imaging system or adjacent locations or be close to the surface of detector.
Step 4, driving means drives dispersion element to initial position, and wherein, initial position is detector image planes surfaces
Edge, if dispersion element enters from the right side of multi-optical spectrum imaging system, then initial position is the right hand edge on detector image planes surface；
Step 5, calculates the translational speed needed for dispersion element:
The translational speed of dispersion element can be arranged according to the collection frame frequency of the calibration result of step 2 and detector.
The collection frame frequency of detector is N, and every section of spectrum is a (mm) in the geometric widths that dispersion element occupies, then dispersion unit
The translational speed of part is a/ (1/N)=a*N (unit: mm/s).
Such as, the collection frame frequency of detector is 60 (frame/s), and every section of spectrum in the geometric position that dispersion element occupies is
During 0.05mm, the translational speed of dispersion element is 3mm/s.
Step 6, driving means, according to the translational speed of the dispersion beam splitter calculated in step 5, drives dispersion element to exist
Move in plane between optical imaging system and detector.
Such as shown in Fig. 2, the right-hand member of the dispersion element high order end from the pixel surface of detector initially enters, until dispersion
The low order end on the left end removal detector pixel surface of element.
Step 7, detector gathers the spectroscopic data of target object the most in the same time.
As in figure 2 it is shown, m0、m1……mnFor the pixel position in the pixel array of detector, λ0……λnFor dispersion element
The different spectrum that upper diverse location is corresponding.
In dispersion element moving process, the single-spectral images that detector collects the most in the same time is different.
At t0Moment, detector pixel array m0It is right that the band 0 (0 is band sequence number, mentions similar as follows) of position gathers
Should be in λ0Spectrum, detector remove m0Outside station acquisition be full spectra image；
At t1In the moment, extract λ0The m of corresponding detector1The band 0 of position and extraction λ1The m of corresponding detector0Position
Band 1；
The like, at t2n-1In the moment, extract λn-1The m of corresponding detectornThe band n-1 of position and extraction λnCorresponding spy
Survey the m of devicen-1The band n of position；
At t2nIn the moment, extract λnThe m of corresponding detectornThe band n of position；
So, when the pixel surface of dispersion element removal detector, the same light that detector difference band is received
Spectrum λiImage splice, the different spectrum pictures under fixing visual field can be obtained.
Dispersion element reversely movement can obtain the spectral image information of future time.Therefore, one-dimensional by dispersion element
Move back and forth, obtain the spectroscopic data cube under different time.
The embodiment of the present invention is by being placed in dispersion element between optical imaging system and detector, by mobile dispersion unit
Part can obtain the multispectral image under fixing visual field.Compared with conventional gazing type light spectrum image-forming mode, under simple in construction, cost
Fall.
Claims (7)
1. a gazing type multispectral imaging method, it is characterised in that including: optical imaging system 4, dispersion element 2, driving dress
Put 3 and detector 1；
The optical axis of described optical imaging system 4 is respectively perpendicular to surface and the pixel of described detector 1 of described dispersion element 2
Surface；
Described dispersion element 2 is between described optical imaging system 4 and described detector 1；
Described driving means 3 drives described dispersion element 2 to move in one direction.
2. the method for claim 1, it is characterised in that described driving means drives described dispersion element 2 along a side
Specifically include to movement:
Described dispersion element 2 enters from the one end on the pixel surface of described detector 1, from the pixel surface of described detector 1
The other end removes.
3. method as claimed in claim 2, it is characterised in that the moving direction of described dispersion element 2 and described detector 1
Row or column is to vertically.
4. the method as described in any one in claim 1-3, it is characterised in that drive dispersion unit in described driving means 2
Before part 2 is mobile between described optical imaging system 4 and described detector 1, also include:
Determine the different spectrum of the various location on dispersion element 2 surface.
5. method as claimed in claim 4, it is characterised in that drive dispersion element 2 at described optics in described driving means 2
Before moving between imaging system 4 and described detector 1, also include:
The translational speed needed for dispersion element is calculated according to formula a/ (1/N)=a*N (unit: mm/s),
Wherein, N is the collection frame frequency of detector, and a is the geometric widths that every section of spectrum occupies at dispersion element.
6. the method as described in any one in claim 1-5, it is characterised in that described dispersion element 2 is positioned at described optics
In the image planes of imaging system or adjacent locations or be close to the surface of detector.
7. the method as described in any one in claim 1-5, it is characterised in that described optical imaging system be photographing unit or
Microscope.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610322147.1A CN106052868B (en) | 2016-05-16 | 2016-05-16 | Gazing type multispectral imaging method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610322147.1A CN106052868B (en) | 2016-05-16 | 2016-05-16 | Gazing type multispectral imaging method |
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| Publication Number | Publication Date |
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| CN106052868A true CN106052868A (en) | 2016-10-26 |
| CN106052868B CN106052868B (en) | 2019-02-12 |
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| CN201610322147.1A Active CN106052868B (en) | 2016-05-16 | 2016-05-16 | Gazing type multispectral imaging method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110907035A (en) * | 2019-12-05 | 2020-03-24 | 中国科学院长春光学精密机械与物理研究所 | Multi-channel optical filter, hyperspectral scanning detector and preparation method thereof |
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| CN101063829A (en) * | 2006-04-27 | 2007-10-31 | 三星电子株式会社 | Overlay measuring method and overlay measuring apparatus using the same |
| US8049886B1 (en) * | 2010-10-14 | 2011-11-01 | Alcon Lensx, Inc. | Spectrometer with adjustable-deflector-controlled alignment for optical coherence tomography |
| CN202522721U (en) * | 2012-03-08 | 2012-11-07 | 孔令华 | Two-hue mirror filtering film |
| CN204359434U (en) * | 2014-07-17 | 2015-05-27 | 中国科学院遥感与数字地球研究所 | A kind of imaging spectral instrument system |
| WO2016012794A2 (en) * | 2014-07-23 | 2016-01-28 | Andor Technology Limited | Spectrometer |
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2016
- 2016-05-16 CN CN201610322147.1A patent/CN106052868B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101063829A (en) * | 2006-04-27 | 2007-10-31 | 三星电子株式会社 | Overlay measuring method and overlay measuring apparatus using the same |
| US8049886B1 (en) * | 2010-10-14 | 2011-11-01 | Alcon Lensx, Inc. | Spectrometer with adjustable-deflector-controlled alignment for optical coherence tomography |
| CN202522721U (en) * | 2012-03-08 | 2012-11-07 | 孔令华 | Two-hue mirror filtering film |
| CN204359434U (en) * | 2014-07-17 | 2015-05-27 | 中国科学院遥感与数字地球研究所 | A kind of imaging spectral instrument system |
| WO2016012794A2 (en) * | 2014-07-23 | 2016-01-28 | Andor Technology Limited | Spectrometer |
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| CN110907035A (en) * | 2019-12-05 | 2020-03-24 | 中国科学院长春光学精密机械与物理研究所 | Multi-channel optical filter, hyperspectral scanning detector and preparation method thereof |
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| CN106052868B (en) | 2019-02-12 |
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Effective date of registration: 20200115 Address after: Room B101, Jilin optoelectronic industry incubator Co., Ltd., 1759 Mingxi Road, Beihu science and Technology Development Zone, Changchun City, Jilin Province 130000 Patentee after: Changchun Changguang Chenpu Technology Co., Ltd Address before: 130033 southeast Lake Road, Jilin, Changchun, No. 3888 Patentee before: Changchun Inst. of Optics and Fine Mechanics and Physics, Chinese Academy of Sci |
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