CN109405972A - A kind of EO-1 hyperion polarized imaging system - Google Patents
A kind of EO-1 hyperion polarized imaging system Download PDFInfo
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- CN109405972A CN109405972A CN201811445355.6A CN201811445355A CN109405972A CN 109405972 A CN109405972 A CN 109405972A CN 201811445355 A CN201811445355 A CN 201811445355A CN 109405972 A CN109405972 A CN 109405972A
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- 238000003384 imaging method Methods 0.000 title claims abstract description 45
- 230000010287 polarization Effects 0.000 claims abstract description 59
- 238000001228 spectrum Methods 0.000 claims abstract description 28
- 230000003595 spectral effect Effects 0.000 claims description 15
- 230000003287 optical effect Effects 0.000 claims description 5
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 238000003786 synthesis reaction Methods 0.000 claims description 3
- 238000009740 moulding (composite fabrication) Methods 0.000 abstract description 17
- 238000001514 detection method Methods 0.000 abstract description 6
- 230000001360 synchronised effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 238000000701 chemical imaging Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000012634 optical imaging Methods 0.000 description 1
Classifications
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- 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
- G01J3/447—Polarisation spectrometry
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- 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
- G01J3/0205—Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows
-
- 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
Abstract
The invention belongs to high light spectrum image-formings and polarization imaging technical field, and in particular to a kind of EO-1 hyperion polarized imaging system.The EO-1 hyperion polarized imaging system includes high light spectrum image-forming optics system and polarization detector, and polarization detector is used to receive the image information of high light spectrum image-forming optics system acquisition；The corresponding ground a line scenery of instantaneous field of view is divided by high light spectrum image-forming optics system along scanning direction, and is imaged in every a line of polarization detector.Scenery is scanned using EO-1 hyperion polarized imaging system of the invention, 4 polarization state information of the high spectrum image and each image pixel that obtain scenery can be synchronized.EO-1 hyperion polarized imaging system of the invention, have the characteristics that structure is simple, small in size, light-weight and easy to use, it is detected over the ground suitable for spaceborne, airborne platform and other with detection of the scanning function platform to scenery, has important application prospect in remote sensing, scouting, detection, identification and analysis field.
Description
Technical field
The invention belongs to high light spectrum image-formings and polarization imaging technical field, and in particular to a kind of EO-1 hyperion polarization imaging system
System.
Background technique
High light spectrum image-forming and polarization imaging are two kinds of imaging modes, respectively there is feature.High light spectrum image-forming is to obtain scenery two
While dimension space reflection/radiation information, the spectral information of each unit of scenery is obtained, as shown in Figure 1.Polarization imaging is to obtain
Object two-dimensional space reflection/radiation information find a view simultaneously, obtains the polarization information of each unit of scenery, generally by before rotating camera
Polarizing film obtain different directions on polarization image, as shown in Figure 2；Or different directions are integrated in planar array detector pixel
Micro- polarizing film obtains polarization image, as shown in Figure 3.
EO-1 hyperion polarization imaging is that spectrographic detection technology, Polarization Detection technology and geometry imaging technique combine together, energy
It is enough obtain simultaneously the two-dimensional space reflection/radiation information for being tested scenery, the corresponding spectral information of each two-dimensional space pixel and
The pixel corresponds to the polarization information of different spectral coverage.Spectral coverage number is the Hyperspectral imager of N, obtains N width spectrum to Scenery Imaging
Image, the corresponding different spectral coverage of every width figure.Polarization state is the polarized imaging system of M, obtains M width polarization figure to Scenery Imaging
Picture, the corresponding different polarization state of every width figure.Above-mentioned Hyperspectral imager and polarized imaging system are combined, then it is right
Scenery is Polaroid will to obtain N × M width image, obtain scenery in space dimension, the feature of spectrum peacekeeping polarization three aspects of dimension.
Summary of the invention
(1) technical problems to be solved
The present invention proposes a kind of EO-1 hyperion polarized imaging system, how to solve with an optical system and a detector
The imaging system of composition solves during Polaroid, while obtaining the high spectrum image of scenery and the technology of polarization image
Problem.
(2) technical solution
In order to solve the above-mentioned technical problem, the present invention proposes a kind of polarization detector, which includes that face battle array is visited
Survey device and micro- polarizing film；Wherein planar array detector is M row × N column, and every 4 adjacent picture elements integrate 0 °, 45 °, 90 °, 135 ° respectively
Micro- polarizing film of polarization direction.
In addition, the present invention also proposes a kind of EO-1 hyperion polarized imaging system, which includes bloom
Compose imaging optical system and above-mentioned polarization detector；Wherein, polarization detector is for receiving high light spectrum image-forming optics system acquisition
Image information；The corresponding ground a line scenery of instantaneous field of view is divided by high light spectrum image-forming optics system along scanning direction, and at
As in every a line of polarization detector；When image procossing, every 4 adjacent pixels are synthesized into a pixel, are obtained by scanning
The high spectrum image of M/2 spectral coverage of scenery, each image pixel after synthesis include the polarization information in 4 directions.
Further, EO-1 hyperion polarized imaging system using Offner convex grating to successively pass through preposition optics microscope group,
The incident light of slit and concave mirror is divided.
Further, after the light splitting of Offner convex grating, 128 spectral coverages are generated on polarization detector.
Further, the field angle of preposition image optics lens group is 30 °, spatial resolution 0.5mrad.
(3) beneficial effect
EO-1 hyperion polarized imaging system proposed by the present invention, including high light spectrum image-forming optics system and polarization detector, partially
Vibration detector is used to receive the image information of high light spectrum image-forming optics system acquisition；High light spectrum image-forming optics system is by instantaneous field of view
Corresponding ground a line scenery is divided along scanning direction, and is imaged in every a line of polarization detector.Using height of the invention
Spectral polarization imaging system scans scenery, can synchronize 4 polarization states of the high spectrum image and each image pixel that obtain scenery
Information.EO-1 hyperion polarized imaging system of the invention has the characteristics that structure is simple, small in size, light-weight and easy to use, fits
In spaceborne, airborne platform detect over the ground and it is other have detection of the scanning function platform to scenery, in remote sensing, scouting, detection, knowledge
Not and analysis field has important application prospect.
Detailed description of the invention
Fig. 1 is Hyperspectral imager and technical principle schematic diagram；
Fig. 2 is the polarization imaging technical principle schematic diagram using rotatory polarization piece；
Fig. 3 is the polarization imaging technical principle schematic diagram using the integrated micro- polarizing film of different directions；
Fig. 4 is polarization detector structural schematic diagram of the invention；
Fig. 5 is the EO-1 hyperion polarized imaging system structural schematic diagram in the embodiment of the present invention；
Fig. 6 is the preposition image optics lens group schematic diagram in the embodiment of the present invention；
Fig. 7 is the polarization detector structural schematic diagram in the embodiment of the present invention.
Specific embodiment
To keep the purpose of the present invention, content and advantage clearer, with reference to the accompanying drawings and examples, to tool of the invention
Body embodiment is described in further detail.
The present invention proposes a kind of EO-1 hyperion polarized imaging system, and the EO-1 hyperion polarized imaging system is by high light spectrum image-forming optics
System and polarization detector composition.Typical Hyperspectral imager composition as shown in Figure 1, by high light spectrum image-forming optics system and
Planar array detector composition.Wherein, high light spectrum image-forming optics system is made of slit and spectroscopic imaging optical system.By will be typical
Hyperspectral imager in planar array detector change polarization detector into, become EO-1 hyperion polarization imaging system of the invention
System.Wherein, polarization detector is used to receive the image information of high light spectrum image-forming optics system acquisition；High light spectrum image-forming optics system
The corresponding ground a line scenery of instantaneous field of view is divided along scanning direction, and is imaged in every a line of polarization detector.
Polarization detector in the present invention is on planar array detector by 0 °, 45 °, 90 °, 135 ° of technique process
Micro- polarizing film of polarization direction, as shown in Figure 4.Planar array detector is M row × N column, when image procossing, by every 4 adjacent pixels
A pixel is synthesized, can get the high spectrum image of M/2 spectral coverage of scenery by scanning, each image pixel after synthesis includes
There is the polarization information in 4 directions.
Embodiment
Using EO-1 hyperion polarized imaging system as shown in Figure 5, the light splitting of Offner convex grating is selected；Corresponding imaging wave
0.4~0.9 μm of long range；EO-1 hyperion spectral coverage number 128；Spectral resolution 4nm.Using preposition image optics as shown in FIG. 6
Lens group, 30 ° of field angle；Spatial resolution 0.5mrad；For polarization detector according to shown in Fig. 7, being to specification 2048 × 256 can
See that near infrared detector integrates micro- polarizing film of 4 different directions on each pixel.After resulting pixel, picture specification 2047
×128.Above-mentioned imaging system is imaged over the ground in airborne platform, as shown in Figure 1.Imaging system instantaneous field of view is by ground a line scenery
After preposition optical imaging lens group and slit, by Offner convex grating spectroscopic imaging on polarization detector, 128 are generated
A spectral coverage.
Above-mentioned apparatus forms scan-type EO-1 hyperion polarized imaging system, and the working method of system is same by imaging control system
Time of integration of polarization detector, imaging frame frequency and scanning speed and corresponding scenery positional relationship are walked, can be obtained by scanning
Take consecutive image.When image procossing, adjacent 4 pixels of polarization detector are synthesized into a pixel, every row corresponds to same point
Light spectrum, the polarization information in resulting pixel simultaneously containing 4 directions.Therefore, existing in each resulting pixel after scanning imagery
Spectral information from ground pixel also has its polarization state information.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, several improvement and deformations can also be made, these improvement and deformations
Also it should be regarded as protection scope of the present invention.
Claims (5)
1. a kind of polarization detector, which is characterized in that the polarization detector includes planar array detector and micro- polarizing film；Wherein institute
Stating planar array detector is M row × N column, and every 4 adjacent picture elements integrate micro- polarization of 0 °, 45 °, 90 °, 135 ° polarization direction respectively
Piece.
2. a kind of EO-1 hyperion polarized imaging system, which is characterized in that the EO-1 hyperion polarized imaging system includes high light spectrum image-forming
Optical system and polarization detector as described in claim 1；Wherein, the polarization detector for receive the EO-1 hyperion at
As the image information of collection optical system；The high light spectrum image-forming optics system is by the corresponding ground a line scenery edge of instantaneous field of view
Scanning direction light splitting, and image in every a line of the polarization detector；When image procossing, every 4 adjacent pixels are synthesized
One pixel obtains the high spectrum image of M/2 spectral coverage of scenery by scanning, and each image pixel after synthesis includes 4
The polarization information in direction.
3. EO-1 hyperion polarized imaging system as claimed in claim 2, which is characterized in that the EO-1 hyperion polarized imaging system is adopted
The incident light for successively passing through preposition optics microscope group, slit and concave mirror is divided with Offner convex grating.
4. EO-1 hyperion polarized imaging system as claimed in claim 3, which is characterized in that be divided through the Offner convex grating
Afterwards, 128 spectral coverages are generated on the polarization detector.
5. EO-1 hyperion polarized imaging system as claimed in claim 3, which is characterized in that the preposition image optics lens group
Field angle is 30 °, spatial resolution 0.5mrad.
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| CN110081978A (en) * | 2019-04-29 | 2019-08-02 | 南京理工大学 | A kind of multispectral polarization imaging device of transient state and its imaging method |
| CN112326560A (en) * | 2020-10-28 | 2021-02-05 | 上海大学 | Multifold surface-shaped grating and hyperspectral detection device and method |
| CN114173066A (en) * | 2020-09-11 | 2022-03-11 | 通用汽车环球科技运作有限责任公司 | Imaging system and method |
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| CN112326560A (en) * | 2020-10-28 | 2021-02-05 | 上海大学 | Multifold surface-shaped grating and hyperspectral detection device and method |
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