CN103728574A - Solar magnetic field polarization measuring instrument - Google Patents
Solar magnetic field polarization measuring instrument Download PDFInfo
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- CN103728574A CN103728574A CN201310551792.7A CN201310551792A CN103728574A CN 103728574 A CN103728574 A CN 103728574A CN 201310551792 A CN201310551792 A CN 201310551792A CN 103728574 A CN103728574 A CN 103728574A
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Abstract
A solar magnetic field polarization measuring instrument comprises a telescope connector, a monitoring CCD, a collimating mirror, an optical filter, an FLC 1, an FLC 2, an achromatic wave plate, a Savart plate 1, a Savart plate 2, an imaging lens, a plane mirror and a spectrometer. Most light rays of a sun image at the focal plane of a telescope are reflected to the monitoring CCD on the side face, light rays of a target area image enter a subsequent light path for polarization analysis through a small hole of a first focus reflection light aperture, and the first focus reflection light aperture which is made of copper, plated with chromium and polished is arranged at the focal plane of the telescope by 45 degrees, two cooling fans are arranged at the focal plane of the telescope and perpendicular to the two sides of a main light path, and a six-freedom-degree co-space adjusting mechanism is arranged at the position where the light rays of the target area image are divided into two bundles to adjust the light rays by six freedom degrees. A reflection type neutral monitoring light path light reducing piece is added in the monitoring light path by 45 degrees, and the overall components of the instrument are made of duralumin materials.
Description
technical field: the present invention relates to a kind of solar magnetic field polarimetry instrument.
background technology: the information of the physical quantitys such as lower atmosphere layer in the sun (chromosphere, photosphere and zone of transition) magnetic field, radial velocity field is the content that solar physicists is concerned about, especially most of solar physicists wish to obtain the information of different atmospherium physical quantitys, can follow the trail of more in detail like this these physical quantitys with the variation of height, the result that magnetic field extrapolation is obtained is more definite, and wishes to make the result of inverting more accurate with sampled point in more spectral line so higher spectral resolution.And then the physical mechanism of announcement solar activity generation, fast-changing periodicity and nonperiodic phenomenon in the solar atmosphere of finding to maintain close ties with magnetic field, the basic concept hierarchy relevant to magnetic field and dynamics carried out to high time resolution and high-precision observation, to understand fully the reason of the problems such as complete definite and magnetic-field measurement position angle 180 degree uncertainties of the current helicity relevant to magnetic field, current density and Poynting vector, contribute to carry out space weather monitoring, disastrous space weather forecast and early warning.
But the magnetosensitive spectral line that is formed at different levels in solar atmosphere being particularly distributed in solar spectrum of chromosphere magnetosensitive spectral line is not concentrated.As be formed at the HeI1083nm of upper chromosphere and zone of transition and be formed at the CaII849.8nm of low layer in chromosphere, between 854.2nm and 866.8nm, differ 200nm, famous neutral magnesium three line MgI516.8nm of magnetosensitive spectral line that are formed at low chromosphere in addition, 517.2nm and 518.4nm have differed about 320nm with ionization calcium three lines as 854.2nm spectral line again.Although different polarization analyzer can allow user freely select spectral line, often transposing polaroid analyze cannot be realized high precision polarimetry.
In order to address this problem, designed the fiber spectrometer with microlens array, this instrument is connected on guiding telescope.The light path of existing polarization fiber spectrometer is shown in Fig. 1, guide and telescopically come light after collimating mirror, optical filter, FLC1, FLC2, achromatic waveplate, by Sa cut down plate 1, Sa cuts down plate 2 and carries out light splitting, by imaging lens, converged again, imaging on lenticular fiber array after plane mirror reflection, and by optical fiber by light transmission to spectrometer.
Yet the problem that this appliance requires solves has: the heat concentration problem of the first focal plane, because heat is concentrated the picture element producing and gone to pot the cospace problem of problem, optical fiber visual field, focal image monitors that the heat of light path concentrates the CCD damage problem brought etc.
Summary of the invention
For above-mentioned deficiency of the prior art, the invention discloses a kind of solar magnetic field polarimetry instrument.
The present invention adopts following technical proposals:
A kind of solar magnetic field polarimetry instrument, comprise telescope interface, monitor CCD, collimating mirror, optical filter, FLC1, FLC2, achromatic waveplate, Sa cuts down plate 1, Sa cuts down plate 2, imaging lens, plane mirror and spectrometer, at telescope focal plane place, the light reflection of most of sun picture is to the supervision CCD of side, the light of target area picture by the aperture of the first focus reflection diaphragm after successively through collimating mirror, optical filter, FLC1, FLC2, then after achromatic waveplate is processed, enter successively Sa and cut down plate 1, Sa cuts down plate 2, the light of target area picture is reflected into two bundles by plane mirror after imaging lens subsequently, this two-beam line is analyzed by optical fiber lead-in light spectrometer respectively, at telescope focal plane place, adopt 45 ° of first focus reflection diaphragms 6 of placing copper chromium plating polishing.
Preferably, at telescope focal plane place, both sides perpendicular to main optical path arrange two radiator fans, the position employing six degree of freedom cospace governor motion 4 that is divided into two bundles at the light of target area picture, light is carried out to the adjusting of six degree of freedom, realize the two-beam coupling of the image on fiber array respectively.Monitoring the neutral light path light damping plate that monitors of reflection-type that has added 45 ° of placements in light path, weaken luminous energy and monitor CCD with protection.For alleviating whole weight, instrument integral structure component adopts duralumin material to make.
Preferably, FLC1, FLC2 are the optical device with live wire, can be by adding the logical light characteristic of electric control FLC1, FLC2; Inner crossed beam trunking and line outlet in FLC mirror cell, have been designed, the lead-in wire of FLC1, FLC2 all leads to mirror external body by ring groove and the wire hole of polaroid analyze mirror body inside again through crossed beam trunking and line outlet, and can stir aperture on FLC1, FLC2 mirror body by the adjusting hole on polaroid analyze mirror body and regulate its rotation, to reach the object of adjusting instrument performance.
accompanying drawing explanation:
Fig. 1 is solar magnetic field polarimetry instrument light path schematic diagram;
Fig. 2 is the schematic appearance of solar magnetic field polarimetry instrument of the present invention;
Fig. 3 is the sectional view of Fig. 2;
Fig. 4 is polarizer part-structure sectional view;
Fig. 5 is the part-structure schematic diagram of Fig. 4;
Fig. 6 is the schematic diagram of FLC assembly;
embodiment:
Now by reference to the accompanying drawings the present invention is described further.
Shown in Figure 1, in this solar magnetic field polarimetry instrument, at telescope focal plane (the first focus), locate the light reflection of most of sun picture to the supervision CCD of side, the light that only allows target area picture enters subsequent optical path to carry out polarization analysis by the aperture of the first focus reflection diaphragm.In subsequent optical path, the light of target area picture is successively through collimating mirror, optical filter, FLC1, FLC2, then after achromatic waveplate, enter successively that Sa cuts down plate 1, Sa cuts down plate 2, Sa cuts down plate 1, Sa cuts down between plate 2 and is provided with LCVR, the light of target area picture cuts down plate 1, Sa through Sa and after cutting down plate 2, is divided into two bundles, after imaging lens, by plane mirror, is reflected into two reverse direction light beam e light, o light, finally by optical fiber lead-in light spectrometer, is analyzed respectively.
Figure 4 shows that polarizer part-structure sectional view.Wherein, 1 is polarizer housing, and 201 is electric lens trim ring, 202 is electric lens, 203Wei electricity lens mirror cell, and 3 is achromatic waveplate, 4 is trim ring, and 5 is achromatic waveplate mirror cell, and 601 is polariscope front apron, 602 is electrofiltration mating plate trim ring, 603 is electrofiltration mating plate, and 604 is overhead gage, and 605 is polariscope, 606 is lower baffle, and 607 is backboard.
Fig. 5 is the part-structure schematic diagram of Fig. 4, in figure, and the 601st, the trim ring that fixed L CVR uses, the 602nd, LCVR, the 603rd, front apron, the 604th, overhead gage, the 605th, Sa cuts down plate, and the 606th, lower baffle, the 607th, backboard.Wherein, front apron 603, overhead gage 604, lower baffle 606, backboard 607 use screws are connected and fixed and are integral.LCVR is fixed on front apron with trim ring, and Sa cuts down plate and is arranged on lower baffle, and front apron and backboard are discs.These parts are called Sa and cut down plate assembly, and integral installation is in instrument internal.
Fig. 6 is the schematic diagram of FLC assembly, 1 WeiFLC mirror cell wherein, and 2 is FLC, 3 is FLC trim ring.FLC is the optical device with live wire, can be by adding the logical light characteristic of this element of electric control.Inner crossed beam trunking and line outlet in FLC mirror cell, have been designed, the lead-in wire of FLC leads to mirror external body by ring groove and the wire hole of polaroid analyze mirror body inside again through crossed beam trunking and line outlet, and can stir the rotation that aperture on FLC mirror body regulates FLC by the adjusting hole on polaroid analyze mirror body, to reach the object of adjusting instrument performance.In the process of adjusting, electric wire can not affect and adjust action.
The defect of existing solar magnetic field fall-off meter is: the heat of the first focal plane too concentrates the heat that causes picture element to suffer that the cospace problem of destruction, optical fiber visual field is not effectively solved, focal image monitors light path to concentrate monitoring that CCD causes damage.
In order to solve the problems of the technologies described above, solar magnetic field polarimetry instrument of the present invention has been taked following scheme: the light being entered by telescope interface 1 telescope focal plane (the first focus) locate to adopt the copper chromium plating of 45 ° of placements the first focus reflection diaphragm 6 of polishing by the light reflection of most of sun picture to side, the light that only allows target area picture enters subsequent optical path to carry out polarization analysis by the aperture of this reflection diaphragm.Adopting copper is because copper has good thermal conductivity as the material of reflection diaphragm, and the heat that can fast diaphragm be absorbed evenly comes and further by heat, conducted with boundary convection heat is shed.
At the first focus place, both sides perpendicular to main optical path arrange two radiator fans 5, by force ventilated mode, the heat on diaphragm is taken away, simultaneously also by because the heated air of converging of sunshine is taken away, keep the air themperature at diaphragm place that large variation does not occur, thereby keep the picture element of subsequent optical path not produce large destruction;
For solving cospace problem, adopt six degree of freedom cospace governor motion 4, can to light, carry out the adjusting of six degree of freedom, realize the coupling of OE light and the image of EO light on fiber array;
The effect of the first focus monitoring light path CCD is the target of confirming observation, and the picture of the target being observed has passed through aperture in the middle of diaphragm, and to enter polarization analysis light path measured, and remaining is entered supervision light path by the first focus reflection diaphragm 6 reflections.This part light is again collimated and is imaged on monitors that the CCD of light path 3 is upper, if be left intact, the too intensive CCD that will make of luminous energy is burned.Therefore monitoring the neutral light path light damping plate 2 that monitors of reflection-type that has added 45 ° of placements in light path, weaken luminous energy and monitor CCD with protection.
Instrument integral structure component adopts duralumin material to make, and has alleviated whole weight, has also guaranteed the firm of structure simultaneously.
The foregoing is only better embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (7)
1. a solar magnetic field polarimetry instrument, comprise telescope interface, monitor CCD, collimating mirror, optical filter, FLC1, FLC2, achromatic waveplate, Sa cuts down plate 1, Sa cuts down plate 2, imaging lens, plane mirror and spectrometer, at telescope focal plane place, the light reflection of most of sun picture is to the supervision CCD of side, the light of target area picture by the aperture of the first focus reflection diaphragm after successively through collimating mirror, optical filter, FLC1, FLC2, then after achromatic waveplate is processed, enter successively Sa and cut down plate 1, Sa cuts down plate 2, the light of target area picture is reflected into two bundles by plane mirror after imaging lens subsequently, this two-beam line is analyzed by optical fiber lead-in light spectrometer respectively, it is characterized in that: the first focus reflection diaphragm that adopts copper chromium plating the polishing of 45 ° of placements at telescope focal plane place.
2. solar magnetic field polarimetry instrument according to claim 1, is characterized in that, at telescope focal plane place, perpendicular to the both sides of main optical path, two radiator fans is set.
3. solar magnetic field polarimetry instrument according to claim 1 and 2, it is characterized in that, the position employing six degree of freedom cospace governor motion that is divided into two bundles at the light of target area picture, light is carried out to the adjusting of six degree of freedom, realize the two-beam coupling of the image on fiber array respectively.
4. solar magnetic field polarimetry instrument according to claim 1 and 2, is characterized in that, monitoring the neutral light path light damping plate that monitors of reflection-type that has added 45 ° of placements in light path, weakens luminous energy and monitors CCD with protection.
5. solar magnetic field polarimetry instrument according to claim 3, is characterized in that, monitoring the neutral light path light damping plate that monitors of reflection-type that has added 45 ° of placements in light path, weakens luminous energy and monitors CCD with protection.
6. solar magnetic field polarimetry instrument according to claim 1, is characterized in that, instrument integral structure component adopts duralumin material to make.
7. solar magnetic field polarimetry instrument according to claim 1, is characterized in that: FLC1, FLC2 are the optical device with live wire, can be by adding the logical light characteristic of electric control FLC1, FLC2; Inner crossed beam trunking and line outlet in FLC mirror cell, have been designed, the lead-in wire of FLC1, FLC2 all leads to mirror external body by ring groove and the wire hole of polaroid analyze mirror body inside again through crossed beam trunking and line outlet, and can stir aperture on FLC1, FLC2 mirror body by the adjusting hole on polaroid analyze mirror body and regulate its rotation, to reach the object of adjusting instrument performance.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104180973A (en) * | 2014-09-09 | 2014-12-03 | 中国科学院国家天文台 | In-orbit debug system and method realizing solar magnetic field telescope transmission profile |
| CN105675134A (en) * | 2016-02-01 | 2016-06-15 | 南京理工大学 | FLC-based hyperspectral all-polarization imaging device and method |
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Cited By (4)
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| CN104180973A (en) * | 2014-09-09 | 2014-12-03 | 中国科学院国家天文台 | In-orbit debug system and method realizing solar magnetic field telescope transmission profile |
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| CN105675134A (en) * | 2016-02-01 | 2016-06-15 | 南京理工大学 | FLC-based hyperspectral all-polarization imaging device and method |
| CN105675134B (en) * | 2016-02-01 | 2017-09-22 | 南京理工大学 | High spectrum full polarization imaging apparatus and method based on FLC |
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Application publication date: 20140416 |