CN108414085A - A kind of large field of view scan system - Google Patents
A kind of large field of view scan system Download PDFInfo
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- CN108414085A CN108414085A CN201711481939.4A CN201711481939A CN108414085A CN 108414085 A CN108414085 A CN 108414085A CN 201711481939 A CN201711481939 A CN 201711481939A CN 108414085 A CN108414085 A CN 108414085A
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- 230000000007 visual effect Effects 0.000 claims abstract description 55
- 230000003287 optical effect Effects 0.000 claims abstract description 35
- 230000009021 linear effect Effects 0.000 claims abstract description 24
- 230000003595 spectral effect Effects 0.000 claims abstract description 14
- 230000007246 mechanism Effects 0.000 claims abstract description 9
- 239000006185 dispersion Substances 0.000 claims abstract description 8
- 238000001228 spectrum Methods 0.000 claims description 13
- 238000003384 imaging method Methods 0.000 claims description 7
- 230000000149 penetrating effect Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 description 12
- 238000011160 research Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 238000004611 spectroscopical analysis Methods 0.000 description 5
- 238000013519 translation Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000000701 chemical imaging Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 210000001747 pupil Anatomy 0.000 description 2
- 238000003325 tomography Methods 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
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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
- G01J3/2823—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
- G01J3/28—Investigating the spectrum
- G01J2003/283—Investigating the spectrum computer-interfaced
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- 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 present invention relates to a kind of large field of view scan systems, including:For acquiring the Solar Optical Telescope of the light beam that solar atmosphere moving target is sent out, optical relay apparatus, visual field scanning device, grating spectrograph, CCD camera, computer and linear driving mechanism for driving scanning means mass activity;Visual field scanning device includes orthogonal two plane mirror;Grating spectrograph includes slit portion, collimating mirror, grating portion;The light beam of Solar Optical Telescope acquisition enters slit portion, and grating portion is incident to after being collimated via collimating mirror after optical relay apparatus after the reflection of two plane mirrors;Segment beam after grating portion dispersion light splitting is incident to collimating mirror again;CCD camera is for acquiring the light beam for being incident to collimating mirror again and being converted into electric signal to computer, to form spectral information.The visual field scanning device of large field of view scan system proposed by the present invention uses the visual field scanning mode of bimirror, simplifies optical system structure, reduces the adjustment requirement of optical system.
Description
Technical field
The present invention relates to optical scanners, and in particular, to a kind of large field of view scan system.
Background technology
Slit grating spectrograph is to study the important instrument of solar magnetic field distribution, and obtained in the observation of solar atmosphere
Extensive utilization has been arrived, what Beijing Science Press published for 1987《Survey celestial objects》Inside there is Huang Youran, is permitted to endure Ao, the Qin
The correlation technique data that will sea et al. is delivered.
In order to study distribution character of the solar magnetic field on different solar atmospheres, generally use three-dimensional spectral imaging technology.
Three-dimensional spectral imaging technology can be divided into visual field integral unit (IFU) technology based on fiber array, as cutter technology and visual field
(three-dimensional astronomical imaging spectral technique [J] s of Wang Junfan, Zhu Yongtian, the Hu Zhongwen based on integral field unit is astronomical for scanning technique
Learn progress, 2008,26 (1):73-79.).
Relative to visual field integral unit technology and as cutter technology, visual field scanning technology has simple in structure, user
Just, the advantages that processing request is low and is convenient for adjustment, extensive utilization is obtained in every field.Traditional visual field scanning technology
The mono- scarnning mirrors of pupil face tip-tilt and K scarnning mirrors can be divided into.Wherein, the mono- scarnning mirror technology generally use piezoelectric ceramics of tip-tilt
Driving, but there is stringent space limitation in its placement position, it is necessary to it is placed in pupil face position.K scarnning mirrors technology is by three plane microscope groups
At, and arranged in K fonts, its main feature is that optical axis direction does not change after K mirrors.Relative to the mono- scarnning mirror technologies of tip-tilt, K mirrors
Scanning technique proposes higher requirement although stringent limitation without space arrangement position to the adjustment of optical system
(Stolpe F,Kneer F.MISC,an instrument for multi-dimensional spectroscopy[J]
.Astronomy&Astrophysics Supplement,1998,131(1):181-185.).Based on background above, spy proposes
The application.
Invention content
The technical problem to be solved by the present invention is to how to simplify large field of view scan system and reduce optics adjustment requirement,
The stringent limitation of visual field scanning device space arrangement position is eliminated simultaneously.
This is in order to solve the above technical problems, the present invention proposes a kind of large field of view scan system comprising including:Sun optics
Telescope, optical relay apparatus, visual field scanning device, grating spectrograph, CCD camera, computer and linear driving mechanism;It is described
Visual field scanning device includes the first plane mirror and the second plane mirror perpendicular to the first plane mirror;The grating spectrograph includes narrow
Seam portion, collimating mirror, grating portion;The linear driving mechanism is for driving the activity of scanning means overall linear to adjust the first plane
Mirror and the second plane mirror reflect the light beam under different visual fields;The Solar Optical Telescope is for acquiring solar atmosphere moving target
The light beam sent out, and Solar Optical Telescope acquisition light beam after optical relay apparatus relays, successively via the first plane mirror
Enter slit portion after being reflected with the second plane mirror;Into slit portion light beam collimated via collimating mirror after light beam be incident to grating
Portion carries out dispersion light splitting;Segment beam after grating portion dispersion light splitting is incident to collimating mirror again;The CCD camera is for adopting
Collection is incident to the light beam of the collimating mirror and is translated into electric signal to the computer again, and the computer is to basis
The electric signal forms corresponding spectral information.
Preferably, the linear movement distance X for the field range Y and visual field scanning device that the visual field scanning device is scanned
Therebetween it should meet following relationship:Y=2X.
Preferably, the scanning step Δ y of the visual field scanning device and grating spectrograph slit width wsFormula must be met:
Δy≤0.5ws。
Preferably, the computer can form multigroup spectral information, which is the first plane mirror and second
The spectral information corresponding to light beam that plane mirror is reflected when linearly movable;The computer can be obtained according to multigroup spectral information
Obtain three-dimensional spectral information.
Preferably, the slit sizes of the slit portion are adjustable.
Preferably, the grating portion is transmission-type grating or reflective gratings.
Preferably, the CCD camera includes image device and photoelectric detector.
Preferably, the extending direction of the slit of the slit portion and the extending direction of the grating line in the grating portion are flat
Row.
By using above-mentioned technical proposal, the present invention can obtain following technique effect:
1, large field of view scan system proposed by the present invention, visual field scanning device use the visual field scanning mode of bimirror, letter
Change optical system structure, reduces the adjustment requirement of optical system, and without the stringent limitation of space arrangement position;
2, large field of view scan proposed by the present invention fills system, by way of linear translation visual field scanning device, can realize pair
The observed object of different visual fields carries out light spectrum image-forming observation, this divides the thermodynamic parameter of the solar atmosphere on different height
The research that cloth and solar atmosphere activity are developed is of great significance;
3, large field of view scan system proposed by the present invention, visual field scanning device scanning field of view size are linear translation stage movements
2 times of distance are not related to the mathematical operation of any complexity, therefore scan efficiency is high;In addition, visual field scanning device service band is not
It is restricted, it is light-weight, use simple, the visual field scanning imaging particularly suitable for slit grating spectrograph;This is for big visual field
Three-dimensional light spectrum image-forming and tomography research are of great significance;
4, image co-registration and data processing of the large field of view scan system proposed by the present invention by the later stage, you can obtain three-dimensional spectrum
Data cube, this is of great significance for the movable research of solar atmosphere, and innovation and practicality is apparent.
Description of the drawings
Fig. 1 depicts the relational graph of the large field of view scan system components of one embodiment of the invention;
Fig. 2 depicts the optical relay apparatus, visual field scanning device, slit portion of the large field of view scan system of one embodiment of the invention
Relational graph.
Specific implementation mode
To keep the purpose, technical scheme and advantage of embodiment of the present invention clearer, implement below in conjunction with the present invention
The technical solution in embodiment of the present invention is clearly and completely described in attached drawing in mode, it is clear that described reality
The mode of applying is some embodiments of the invention, rather than whole embodiments.Based on the embodiment in the present invention, ability
The every other embodiment that domain those of ordinary skill is obtained without creative efforts, belongs to the present invention
The range of protection.Therefore, the detailed description of the embodiments of the present invention to providing in the accompanying drawings is not intended to limit and wants below
The scope of the present invention of protection is sought, but is merely representative of the selected embodiment of the present invention.Based on the embodiment in the present invention,
The every other embodiment that those of ordinary skill in the art are obtained without creative efforts belongs to this
Invent the range of protection..
Combined with Figure 1 and Figure 2, in one embodiment, large field of view scan system of the invention, including:Solar Optical Telescope
1, optical relay apparatus 2, visual field scanning device 3, grating spectrograph, CCD camera 7, computer 8 and linear driving mechanism 9;Visual field
Scanning means 3 includes the first plane mirror 3A and the second plane mirror 3B perpendicular to the first plane mirror 3A;Grating spectrograph includes narrow
Seam portion 4, collimating mirror 5, grating portion 6;Linear driving mechanism 9 is for driving 3 overall linear activity of scanning means flat to adjust first
Face mirror 2A and the second plane mirror 2B reflect the light beam under different visual fields;Solar Optical Telescope 1 is for acquiring solar atmosphere activity
The light beam that target is sent out, and Solar Optical Telescope 1 acquire light beam through optical relay apparatus 2 relaying after, successively via first
Enter slit portion 4 after plane mirror 3A and the second plane mirror 3B reflections;Into slit portion 4 light beam via collimating mirror 5 collimate after
Light beam is incident to grating portion 6 and carries out dispersion light splitting;Segment beam after 6 dispersion of grating portion light splitting is incident to collimating mirror 5 again;
CCD camera 7 is for acquiring the light beam for being incident to the collimating mirror 5 again and being translated into electric signal to computer 8, computer
8 according to electric signal forming corresponding spectral information.
The segment beam that rear portion is divided via 6 dispersion of grating portion is incident to 5 post-concentration of collimating mirror in grating spectrograph again
The focal plane of system is imaged.The selection of the size of the slit of slit portion 4 is related with specific systematic parameter, such as too
Positive optical telescope bore, effective focal length, the focal length of grating spectrograph and the bore of collimating mirror 5, for a specific sun
For optical telescope and grating spectrograph, the size occurrence of the slit of slit portion 4 can determine.In order to match it is different too
Positive optical telescope and grating spectrograph, the variable dimension of the slit of slit portion 4, by adjusting the size of the slit of slit portion 4
The resolution of the changeable spectrum being ultimately imaged.
Grating portion 6 can carry out diffraction to light beam and form multiple order spectrum, and user can adjust corresponding wave band according to actual needs
Light beam incident straight collimating mirror 5 again.Collimating mirror 5 is imaged again incident light beam, and the data of light spectrum image-forming are by CCD
Camera 7 acquires and is converted to electric signal and is sent to computer 8 and handled, and has just obtained the spectrum number corresponding to single slit image
According to.Further, the first plane mirror 2A and the second plane mirror 2B that visual field scanning device 2 is controlled by linear driving mechanism 9 are same
Moved further (with identical movement speed and towards identical direction) so that the light that the observed object of different visual fields generates respectively according to
Among the secondary slit portion into slit grating spectrograph, and then the corresponding slit image of different visual fields has can be obtained in computer, respectively
Slit image includes the spectral information of corresponding light beam.Repeatedly, finally after the completion of scanning, computer can form multigroup spectrum letter
Breath, multigroup spectral information is by the light corresponding to the light beam that is reflected when the first plane mirror 3A and the second plane mirror 3B continuous movings
Spectrum information.Computer further can splice the slit image of different visual fields to obtain three-dimensional spectroscopic data cube, to
It realizes and light spectrum image-forming is carried out to the movable target of solar atmosphere.
In conjunction with Fig. 2, if the distance that two plane mirrors translate up when visual field scanning device 3 is completed to scan the light beam in visual field
For X, it is illustrated that middle A, D, F, G are expressed as the contact position that light beam injects plane mirror.AB=EF=X, ∠ CBD=∠ CDB=
45 °, ∠ GEF=∠ EGF=45 ° can obtain BC=CD=GF=EF=X.The line of scanning field of view size Y and visual field scanning device 3
Property displacement distance X should meet therebetween formula one:Y=2X.If the slit width of the slit portion of grating spectrograph is ws.According to
Sampling thheorem, the scanning step Δ y and grating spectrograph slit width w of visual field scanning device 3sFormula two must be met:Δy≤
0.5ws.When carrying out view field imaging scanning, the linear movement distance of visual field scanning device 3 meets formula three:Δx≤0.25ws。
With scanning step Δ y, by carrying out continuous scanning to solar atmosphere observed object, and scanning each time is obtained
As a result image mosaic is carried out, so that it may obtain the three-dimensional spectroscopic data cube of observed object, both include that one-dimensional spectroscopic data is believed
Breath, while two-dimensional spatial information has been obtained, this is of great significance for the movable observation of solar atmosphere.
Optical relay system 2 can also be transmissive optical element either reflection type optical element, as long as can meet
The function of light path relaying.
The size of the scanning field of view of visual field scanning device 3 is directly proportional to mirror size, and mirror size with according to practical sight
The size for surveying visual field is determined, as long as can meet the needs of actual observation visual field.Linear driving mechanism 9 controls visual field and sweeps
3 linearly moving speed of imaging apparatus is related with the rapid development degree of observed object, as long as can meet the need of actual observation target
It asks.3 two plane mirrors of visual field scanning device both may be mounted on the same linear moving table by a linear movement
Platform controller 9 controls, and can also be mounted on two independent linear moving tables 9, and put down respectively by two linear movements
Platform controller 9 controls, as long as can meet with identical linear speed and move in the same direction.
The extending direction of the slit of slit portion 4 is parallel with the extending direction of grating line in the grating portion 6.Slit portion 4
Slit must be located at the focal plane position of Solar Optical Telescope, and the slit of slit portion 4 need to be flat with the groove direction in grating portion 6
Row.The size of the slit of slit portion 4 can manual setting or motor adjustment.
Grating portion 6 is transmission-type grating or reflective gratings.7 system of CCD camera can meet to sun surface regional area into
The system of row imaging, generally includes image device and photoelectric detector.8 system of computer can meet to sun surface partial zones
Domain be imaged after the system that is handled of data, including corresponding data acquisition means.Grating spectrograph of the present invention both may be used
Can also be other types of imaging system to be Littrow systems.
Large field of view scan system proposed by the present invention, visual field scanning device use the visual field scanning mode of bimirror,
Optical system structure is simplified, reduces the adjustment requirement of optical system, and without the stringent limitation of space arrangement position.This hair
The large field of view scan dress system of bright proposition can be realized by way of linear translation visual field scanning device to different visual fields
Observed object carries out light spectrum image-forming observation, this is big for the thermodynamic parameter distribution of the solar atmosphere on different height and the sun
The research that gas activity is developed is of great significance.Large field of view scan system proposed by the present invention, the scanning of visual field scanning device regard
Field size is 2 times of linear translation stage displacement distance, is not related to the mathematical operation of any complexity, therefore scan efficiency is high;This
Outside, visual field scanning device service band is unrestricted, light-weight, using simple, particularly suitable for slit grating spectrograph
Visual field scanning is imaged;This is of great significance for wide view-field three-D light spectrum image-forming and tomography research;It is proposed by the present invention
Image co-registration and data processing of the large field of view scan system by the later stage, you can obtain three-dimensional spectroscopic data cube, this for
The movable research of solar atmosphere is of great significance, and innovation and practicality is apparent.
The foregoing is merely the preferred embodiment of the present invention, are not intended to restrict the invention, for this field
For technical staff, the invention may be variously modified and varied.All within the spirits and principles of the present invention, any made by
Modification, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (8)
1. a kind of large field of view scan system, which is characterized in that including:Solar Optical Telescope 1, optical relay apparatus 2, visual field are swept
Imaging apparatus (3), grating spectrograph, CCD camera (7), computer (8) and linear driving mechanism (9);The visual field scanning device
(3) include the first plane mirror (3A) and the second plane mirror (3B) perpendicular to the first plane mirror (3A);The grating spectrograph packet
Containing slit portion (4), collimating mirror (5), grating portion (6);The linear driving mechanism (9) is for driving scanning means (3) overall wire
Sexuality is to adjust the light beam under the first plane mirror (2A) visual field different with the second plane mirror (2B) reflection;
The Solar Optical Telescope (1) is for acquiring the light beam that solar atmosphere moving target is sent out, and Solar Optical Telescope
(1) light beam acquired is anti-via the first plane mirror (3A) and the second plane mirror (3B) successively after optical relay apparatus (2) relaying
Enter slit portion (4) after penetrating;Light beam into slit portion (4) is incident to grating portion (6) via the light beam after collimating mirror (5) collimation
Carry out dispersion light splitting;Segment beam after grating portion (6) dispersion light splitting is incident to collimating mirror (5) again;The CCD camera
(7) it is used to acquire the light beam for being incident to the collimating mirror (5) again and be translated into electric signal to the computer (8), institute
Computer (8) is stated to form corresponding spectral information according to the electric signal.
2. large field of view scan system according to claim 1, which is characterized in that the visual field scanning device (3) is scanned
The linear movement distance X of field range Y and visual field scanning device (3) should meet following relationship therebetween:Y=2X.
3. large field of view scan system according to claim 1, which is characterized in that the scanning of the visual field scanning device (3)
Step delta y and grating spectrograph slit width wsFormula must be met:Δy≤0.5ws。
4. large field of view scan system according to claim 1, which is characterized in that the computer can form multigroup spectrum letter
It ceases, corresponding to the light beam which is reflected by the first plane mirror (3A) and the second plane mirror (3B) when linear movable
Spectral information;The computer can obtain three-dimensional spectral information according to multigroup spectral information.
5. large field of view scan system according to claim 1, which is characterized in that the slit sizes of the slit portion (4) can
It adjusts.
6. large field of view scan system according to claim 1, which is characterized in that the grating portion (6) is transmission-type grating
Or reflective gratings.
7. large field of view scan system according to claim 1, which is characterized in that the CCD camera (7) includes imager
Part and photoelectric detector.
8. large field of view scan system according to claim 1, which is characterized in that the extension of the slit of the slit portion (4)
Direction is parallel with the extending direction of grating line of grating portion (6).
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110989188A (en) * | 2019-12-18 | 2020-04-10 | 华中科技大学 | K mirror optical system adjusting method |
CN113126279A (en) * | 2019-12-31 | 2021-07-16 | 成都理想境界科技有限公司 | Optical fiber scanner and near-to-eye display system |
CN115655470A (en) * | 2022-12-12 | 2023-01-31 | 中国科学院长春光学精密机械与物理研究所 | Space sun-facing imaging spectrometer |
CN117193392A (en) * | 2023-11-07 | 2023-12-08 | 中国科学院长春光学精密机械与物理研究所 | Follow-up dome intelligent control system and control method thereof |
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Publication number | Priority date | Publication date | Assignee | Title |
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CN115655470A (en) * | 2022-12-12 | 2023-01-31 | 中国科学院长春光学精密机械与物理研究所 | Space sun-facing imaging spectrometer |
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CN117193392A (en) * | 2023-11-07 | 2023-12-08 | 中国科学院长春光学精密机械与物理研究所 | Follow-up dome intelligent control system and control method thereof |
CN117193392B (en) * | 2023-11-07 | 2024-01-30 | 中国科学院长春光学精密机械与物理研究所 | Follow-up dome intelligent control system and control method thereof |
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Application publication date: 20180817 |