CN108303179A - 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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- CN108303179A CN108303179A CN201711483660.XA CN201711483660A CN108303179A CN 108303179 A CN108303179 A CN 108303179A CN 201711483660 A CN201711483660 A CN 201711483660A CN 108303179 A CN108303179 A CN 108303179A
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- 230000007246 mechanism Effects 0.000 claims abstract description 16
- 238000001228 spectrum Methods 0.000 claims description 11
- 239000006185 dispersion Substances 0.000 claims description 6
- 238000005516 engineering process Methods 0.000 description 12
- 238000003384 imaging method Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000004611 spectroscopical analysis Methods 0.000 description 6
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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
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Abstract
The present invention relates to a kind of large field of view scan systems comprising Solar Optical Telescope, visual field scanning device, rotary drive mechanism, grating spectrograph, CCD camera and computer；Grating spectrograph has slit portion, collimating mirror and grating portion；Visual field scanning device includes two plane mirrors being mutually parallel；Rotary drive mechanism to drive two plane mirrors rotate synchronously；Solar Optical Telescope is for acquiring the light beam that solar atmosphere moving target is sent out, and the light beam acquired enters slit portion after two plane mirrors reflect successively；It is incident to collimating mirror by the light beam of slit portion, and the light beam after collimation is incident to grating portion；CCD camera is for acquiring the light beam for being incident to collimating mirror again and being translated into electric signal, and computer according to electric signal forming corresponding spectral information.Large field of view scan system proposed by the present invention, visual field scanning device use the visual field scanning mode of bimirror, simplify optical system structure, reduce 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 sun optics is looked in the distance
Mirror, visual field scanning device, rotary drive mechanism, grating spectrograph, CCD camera and computer；The grating spectrograph includes
Slit portion, collimating mirror and grating portion；The visual field scanning device includes the first plane mirror and the second plane mirror, the first plane mirror
The reflecting surface of reflecting surface and the second plane mirror is mutually parallel；The rotary drive mechanism is driving the first plane mirror and second flat
Face mirror rotates synchronously；The Solar Optical Telescope is for acquiring the light beam that solar atmosphere moving target is sent out, and sun optics
The light beam of telescope acquisition enters slit portion after the first plane mirror and the second plane mirror reflect successively；By the slit portion
Light beam is incident to collimating mirror, and the light beam after being collimated via collimating mirror is incident to grating portion and carries out dispersion light splitting；Through grating portion color
It dissipates the segment beam after light splitting and is incident to the collimating mirror again；The CCD camera is incident to the collimation again for acquiring
The light beam of mirror is simultaneously translated into electric signal to the computer, and the computer is corresponding to be formed according to the electric signal
Spectral information.
Preferably, the distance of the rotation center of the rotation center of first plane mirror and second plane mirror is h, institute
The scanning range for stating visual field scanning device is s, and visual field scanning device completes described first after scanning the light beam in scanning range
The rotation angle of plane mirror and the second plane mirror relative initial position is a；Described h, a and s meet following relationship：S=
hsin2a。
Preferably, the computer can form multigroup spectral information, which is the first plane mirror and second
The spectral information corresponding to light beam reflected when plane mirror continuous rotation；The computer can be obtained according to multigroup spectral information
Obtain three-dimensional spectral information.
Preferably, the rotary drive mechanism includes the first support portion of the first plane mirror of support, the second plane mirror of support
The second support portion and rotary driving part；The rotary driving part is driving the first support portion and the second support portion to synchronize
Rotation reflects the light beam under different visual fields to adjust the first plane mirror and the second plane mirror.
Preferably, the slit sizes of the slit portion are adjustable.
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.
Preferably, the grating portion is transmission-type grating or reflective gratings.
Preferably, the scanning step Δ s of the visual field scanning device and grating spectrograph slit width wsMeet formula：Δ
s≤0.5ws。
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, and two plane mirrors are controlled with synchronous rotary by rotary drive mechanism
(i.e. with same angular velocity and in the same direction rotate), rotation angle variation range is big, therefore can carry out the spectrum of big visual field
Imaging observation, this is of great significance for solar atmosphere activity observation；
3, large field of view scan system proposed by the present invention, visual field scanning device is with visual field is big, service band is unrestricted, makes
With it is simple the advantages that, and particularly suitable for the visual field scanning of slit grating spectrograph be imaged, for wide view-field three-D spectrum
Imaging 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 Solar Optical Telescope, visual field scanning device, slit of the large field of view scan system of one embodiment of the invention
The relational graph in portion and collimating mirror part.
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, visual field scanning device 2, rotary drive mechanism 3, grating spectrograph, CCD camera 7 and computer 8；Grating spectrograph includes narrow
Seam portion 4, collimating mirror 5 and grating portion 6；Visual field scanning device 2 includes the first plane mirror 2A and the second plane mirror 2B, the first plane mirror
The reflecting surface of the reflecting surface of 2A and the second plane mirror 2B are mutually parallel；Rotary drive mechanism 3 to drive the first plane mirror 2A and
Second plane mirror 2B is rotated synchronously；Solar Optical Telescope 1 is for acquiring the light beam that solar atmosphere moving target is sent out, and the sun
The light beam that optical telescope 1 acquires enters slit portion 4 after the first plane mirror 2A and the second plane mirror 2B reflect successively；By
The light beam of slit portion 4 is incident to collimating mirror 5, and is incident to grating portion 6 via the light beam after the collimation of collimating mirror 5 and carries out dispersion point
Light；Segment beam after 6 dispersion of grating portion light splitting is incident to collimating mirror 5 again；CCD camera 7 is incident to again for acquiring
The light beam of collimating mirror 5 is simultaneously translated into electric signal to computer 8, and computer 8 according to electric signal forming corresponding spectrum
Information.
In conjunction with Fig. 2, the working method of large field of view scan system of the invention approximately as：First choice, Solar Optical Telescope 1
After being imaged to solar atmosphere moving target, the light beam of convergence relays laggard through the visual field scanning device 2 based on bimirror
Enter the slit portion 4 of grating spectrograph, the variable dimension of the slit of slit portion 4.The part light at rear portion is divided via 6 dispersion of grating portion
Shu Chongxin is incident to 5 post-concentration of collimating mirror and is imaged in the focal plane of grating spectrograph system.By adjusting slit portion 4
The resolution ratio of the changeable spectrum being ultimately imaged of the size of slit.The size of the slit of slit portion 4 is joined with specific system
Number is related, and such as Solar Optical Telescope bore, effective focal length, the bore of spectrometer system focal length and collimating mirror 5 has one
For the Solar Optical Telescope and spectrometer of body, the size occurrence of the slit of slit portion 4 can determine.It grating portion 6 can be right
Light beam carries out diffraction and forms multiple order spectrum, and user can adjust the light beam of corresponding wave band incident straight collimation again according to actual needs
Mirror 5.Collimating mirror 5 is imaged again incident light beam, and the data of light spectrum image-forming are acquired by CCD camera 7 and are converted to electricity
Signal is sent to computer 8 and is handled, and has just obtained the spectroscopic data corresponding to single slit image.Further, pass through rotation
Turn driving mechanism 3 control visual field scanning device 2 the first plane mirror 2A and the second plane mirror 2B synchronous rotaries (with same angular velocity
And rotate in the same direction) so that the observed object of different visual fields sequentially enters the slit portion of slit grating spectrograph respectively
Among, and then the corresponding slit image of different visual fields has can be obtained in computer, each slit image includes the spectral information of corresponding light beam.Such as
This repeatedly, finally after the completion of scanning, computer can form multigroup spectral information, multigroup spectral information be the first plane mirror 2A
With the spectral information corresponding to the light beam that is reflected when the second plane mirror 2B continuous rotations.Computer can be further different visual fields
Slit image spliced to obtain three-dimensional spectroscopic data cube, light is carried out to the movable target of solar atmosphere to realize
Spectrum imaging.
In conjunction with Fig. 2, the distance of the rotation center of the rotation center of the first plane mirror 2A and the second plane mirror 2B is h, visual field
The scanning range of scanning means 2 is s, the first plane mirror when the completion of visual field scanning device 2 is scanned the light beam of scanning range s
The rotation angle of the relative initial position of 2A and the second plane mirror 2B is a.H, a and s meets following relationship：S=hsin2a.Specifically
For, in conjunction with optically basic theory, after the first plane mirror 2A and the second plane mirror 2B, the optical axis direction of light beam does not change light beam
Become.First plane mirror 2A and the second plane mirror 2B (positions corresponding lines A3B3 and A0B0), downside incident light in initial position
The angle of the optical axis of beam and the first plane mirror 2A are 45 °, i.e. ∠ O4O2A3=45 °.By rotary drive mechanism so that the first plane
After mirror 2A and the second plane mirror 2B rotates equal angular a to same direction (positions corresponding lines A2B2 and A1B1), two plane mirrors
Still be mutually parallel (i.e. A2B2 is parallel with A1B1), and upside incident beam can be via the first plane mirror 2A and the second plane
Enter the slit of slit portion 4 after mirror 2B reflections.It can be obtained according to triangle relation：∠ O3O1O2=2a, ∠ O3O5O2=∠ O3O2O5
=45 ° of-a, therefore scanning range s can be obtained and meet formula one with relationship between the two rotation angle a：S=hsin2a.
Scan origin is that optical axis and the plane mirror angle of incident beam are point corresponding to 45 °, it is clear that the variation of rotation angle a
Ranging from：-45°≤a≤45°.It can be seen that from formula one：The distance between scanning range size s and two plane mirror centers h
It is directly proportional with rotation angle a.Obviously, h is bigger, and scanning range is bigger；Rotation angle a is bigger, and scanning is bigger.In addition, from figure one
As can be seen that visual field scanning device 2 is in scanning, position when light beam converges to mirror A1B1 is constant.Therefore, big in order to realize
The scanning of visual field can become smaller the length of A1B1, and the length of A2B2 becomes larger, to increase the size of scanning field of view.
To one derivation of formula, then formula two can be obtained：Δ s=2hcos2a Δs a.If the slit of slit grating spectrograph
Width is ws, at this time grating spectrograph can both obtain maximum spectral resolution, moreover it is possible to obtain maximum capacity usage ratio.Root
According to sampling thheorem, the scanning step Δ s and grating spectrograph slit width w of visual field scanning device 2sFormula three must be met：Δs≤
0.5ws；With scanning step Δ s, by carrying out continuous scanning to solar atmosphere observed object, and the knot scanned each time
Fruit carries out image mosaic, so that it may and the three-dimensional spectroscopic data cube of observed object is obtained, has both included one-dimensional spectroscopic data information,
Two-dimensional image-forming information is obtained simultaneously, this is of great significance for the movable observation of solar atmosphere.
The distance h of the rotation center of the rotation center of first plane mirror 2A and the second plane mirror 2B is adjustable, as long as to meet
Can meet the needs of actual observation visual field.The length of first plane mirror 2A and the second plane mirror 2B can be adjusted, with energy
Meets the needs of actual observation visual field.
Rotary drive mechanism 3 control the first plane mirror 2A and the second plane mirror 2B angular velocity of rotation and observed object it is fast
Fast differentiation degree is related, as long as can meet the needs of actual observation target.
First support portion 3A of the rotary drive mechanism 3 of the present embodiment comprising the first plane mirror 2A of support, support second are flat
The the second support portion 3B and rotary driving part 3C of face mirror 2B；Rotary driving part 3C is driving the first support portion 3A and second
Support portion 3B is rotated synchronously, and reflects the light beam under different visual fields to adjust the first plane mirror 2A and the second plane mirror 2B.First
The support portion that support part 3A and the second support portion 3B can be integrally formed.
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.
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 of bright proposition fills system, and two plane mirrors are controlled with synchronous rotary (i.e. with same angular by rotary drive mechanism
Speed and in the same direction rotation), rotation angle variation range is big, therefore can carry out the light spectrum image-forming observation of big visual field, this
It is of great significance for solar atmosphere activity observation.Large field of view scan system proposed by the present invention, visual field scanning device tool
Have the advantages that visual field is big, service band is unrestricted, using simple, and the visual field particularly suitable for slit grating spectrograph is swept
Imaging is retouched, is of great significance for wide view-field three-D light spectrum image-forming and tomography research.Big visual field proposed by the present invention
Image co-registration and data processing of the scanning system by the later stage, you can obtain three-dimensional spectroscopic data cube, this is big for the sun
The movable research of gas 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, including：Solar Optical Telescope (1), visual field scanning device (2), rotary drive mechanism
(3), grating spectrograph, CCD camera (7) and computer (8)；The grating spectrograph includes slit portion (4), collimating mirror (5)
With grating portion (6)；The visual field scanning device (2) includes the first plane mirror (2A) and the second plane mirror (2B), the first plane mirror
The reflecting surface of the reflecting surface of (2A) and the second plane mirror (2B) is mutually parallel；The rotary drive mechanism (3) is driving first
Plane mirror (2A) and the second plane mirror (2B) rotate synchronously；
(1 for acquiring the light beam that solar atmosphere moving target is sent out, and Solar Optical Telescope for the Solar Optical Telescope
(1) light beam acquired enters slit portion (4) after the first plane mirror (2A) and the second plane mirror (2B) reflect successively；By described
The light beam of slit portion (4) is incident to collimating mirror (5), and is incident to grating portion (6) via the light beam after collimating mirror (5) collimation and carries out
Dispersion is divided；Segment beam after grating portion (6) dispersion light splitting is incident to the 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 in the rotation of first plane mirror (2A)
The distance of the rotation center of the heart and second plane mirror (2B) is h, and the scanning range of the visual field scanning device (2) is s, depending on
Field scan device (2) completes first plane mirror (2A) and the second plane mirror (2B) phase after scanning to the light beam in scanning range
Rotation angle to initial position is a；Described h, a and s meet following relationship：S=hsin2a.
3. large field of view scan system according to claim 1, which is characterized in that the computer can form multigroup spectrum letter
Breath, multigroup spectral information is corresponding to the light beam that is reflected when the first plane mirror (2A) and the second plane mirror (2B) continuous rotation
Spectral information；The computer can obtain three-dimensional spectral information according to multigroup spectral information.
4. large field of view scan system according to claim 1, which is characterized in that the rotary drive mechanism (3) includes branch
Support the first support portion (3A) of the first plane mirror (2A), the second support portion (3B) of the second plane mirror of support (2B), and rotation
Driving portion (3C)；The rotary driving part (3C) to drive the first support portion (3A) and the second support portion (3B) to rotate synchronously,
To adjust the light beam under the first plane mirror (2A) visual field different with the second plane mirror (2B) reflection.
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 extension of the slit of the slit portion (4)
Direction is parallel with the extending direction of grating line of grating portion (6).
7. 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.
8. large field of view scan system according to claim 1, which is characterized in that the scanning step of the visual field scanning device
Δ s and grating spectrograph slit width wsMeet formula：Δs≤0.5ws。
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711483660.XA CN108303179A (en) | 2017-12-29 | 2017-12-29 | A kind of large field of view scan system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711483660.XA CN108303179A (en) | 2017-12-29 | 2017-12-29 | A kind of large field of view scan system |
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| CN201711483660.XA Pending CN108303179A (en) | 2017-12-29 | 2017-12-29 | A kind of large field of view scan system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109974856A (en) * | 2019-04-08 | 2019-07-05 | 智童时刻（厦门）科技有限公司 | It is a kind of take coloured pencil take color method and device |
| CN113552713A (en) * | 2021-06-29 | 2021-10-26 | 上海科技馆 | All-day telescope scanning device and all-day telescope |
| EP4390494A1 (en) * | 2022-12-22 | 2024-06-26 | Weigele Scientific GmbH | Observation instrument for observing celestial body |
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| CN101308253A (en) * | 2007-05-18 | 2008-11-19 | 株式会社理光 | Optical scanning device and image forming device using the optical scanning device |
| CN103017903A (en) * | 2012-12-09 | 2013-04-03 | 中国科学院光电技术研究所 | Optical despinning and slit scanning integrated device based on solar telescope grating spectrometer |
| CN104536134A (en) * | 2014-12-30 | 2015-04-22 | 黄真理 | Probe laser parallel scanning equipment |
| CN104568149A (en) * | 2015-01-28 | 2015-04-29 | 中国科学院光电技术研究所 | Solar grating spectral imaging device capable of correcting system aberration |
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| DE3921816A1 (en) * | 1989-07-03 | 1991-01-17 | Wildgruber Guenther | Dual beam interferometer with rotary mirror system - has beam splitter(s) for amplitude splitting of incident measuring beam and detectors evaluating partial beams mixed by reflectors |
| CN101308253A (en) * | 2007-05-18 | 2008-11-19 | 株式会社理光 | Optical scanning device and image forming device using the optical scanning device |
| CN103017903A (en) * | 2012-12-09 | 2013-04-03 | 中国科学院光电技术研究所 | Optical despinning and slit scanning integrated device based on solar telescope grating spectrometer |
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| CN109974856A (en) * | 2019-04-08 | 2019-07-05 | 智童时刻（厦门）科技有限公司 | It is a kind of take coloured pencil take color method and device |
| CN113552713A (en) * | 2021-06-29 | 2021-10-26 | 上海科技馆 | All-day telescope scanning device and all-day telescope |
| EP4390494A1 (en) * | 2022-12-22 | 2024-06-26 | Weigele Scientific GmbH | Observation instrument for observing celestial body |
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