CN101620007B - Full solar disk sun imager adopting two-channel atomic light filtering technology - Google Patents
Full solar disk sun imager adopting two-channel atomic light filtering technology Download PDFInfo
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- CN101620007B CN101620007B CN2009100635920A CN200910063592A CN101620007B CN 101620007 B CN101620007 B CN 101620007B CN 2009100635920 A CN2009100635920 A CN 2009100635920A CN 200910063592 A CN200910063592 A CN 200910063592A CN 101620007 B CN101620007 B CN 101620007B
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Abstract
The invention discloses a full solar disk sun imager adopting two-channel atomic light filtering technology, which comprises a telescope (01), a light filtering sheet (02), a lambda/4 wave plate (03), a polarizing light splitter (4), an atomic light filter (05), an atomic light filter (11), a light splitter (06), a light splitter (12), an interferometer (07), an interferometer (09), an interferometer (13), an interferometer (15), a CCD (08), a CCD (10), a CCD (14), a CCD (16) and a computer (17). The polarizing light splitter, the atomic light filters, the four interferometers, the four CCDs and the like are fixedly connected without time sequence control, thus four high-resolution spectrum images of the sun can be obtained simultaneously, and the full solar disk brightness, the Doppler velocity and the magnetic field intensity can be obtained after treatment. The technical scheme has the characteristics of scientific scheme, stable and reliable system, convenient use and the like, improves the stability and the precision of measurement of the solar magnetic field, and provides a better detecting device for observing sun and monitoring and predicting space weather.
Description
Technical field:
The present invention relates to full-time solar imager, relate in particular to full-time the brightness, doppler velocity and the magnetic field intensity imager that adopt arrowband atom filter technology.
Background technology:
The sun is a nearest fixed star of liftoff ball, also is and the closest fixed star of mankind's relation.The common relatively placidity of sun surface activity, but also can break out some complexity sometimes suddenly and violent activity, appearance as sunspot group, flare burst, coronal mass emission (CME) etc., these aggravating activitieses can be to the big quantity of material of space impelling, comprise high energy particle, ray, interplanetary magnetic cloud etc., discharge big energy simultaneously, on the one hand, the high energy particle that produces, rays etc. directly threaten spacecraft, influence human space activity, on the other hand, it is quick-fried that the interplanetary magnetic cloud of generation influences earth magnetosphere generation earth magnetism, disturb terrestrial radio communication and large-scale transmission line of electricity facility, to the mankind's generation and the very important influence of life generation.In view of solar activity has direct influence to space activity and human lives, therefore it is now reported and forecasts the attention that more and more is subjected to the scientific worker.As far as is known, the motion of the aggravating activities of the sun and sun material and the variation of solar magnetic field exist certain getting in touch, and these all can obtain reflection in the variation of solar spectrum.Therefore, the imaging of full-time high-resolution spectroscopy of the sun just becomes the important means of studying solar activity.
Full-time magnetic field imager of the sun (Solar magnetic fields measurements with a magneto-optical filter based on atomic light filter (the part document is also referred to as the magneto-optic light filter), A.Cacciani, D.Ricci, P.Rosati, Il Nuovo Cimento C, Italian Physical Society, 1990,13 (1): 125～130), utilize the atomic light filter good stability, the transmissivity height, but the outer plurality of advantages such as strong and imaging that suppress of band absorb line Zeeman splitting under solar magnetic field and become the Doppler's blue shift wing of left-handed and dextrorotation rotatory polarization and the red shift wing high-resolution spectroscopy image (B of totally four width of cloth sun by obtaining sun sodium respectively
+, R
+, B
-, R
-), the treated doppler velocity and the magnetic field intensity information that can obtain full-time the sun of this four width of cloth image.
Obtain above-mentioned four width of cloth solar spectrum images, general at present employing sequential control timesharing obtains, and every width of cloth image needs about 15 seconds, then needs 1 fen clock time just can obtain whole four width of cloth images.When sun relatively placidity because that it changes is little, minute time span can not have much impact to accuracy of observation; And when sun aggravating activities,, the several seconds even if imaging time is separated by, also can produce certain influence to the precision and the accuracy of measuring because its various parameters change rapidly.
Summary of the invention:
The objective of the invention is: a kind of full solar disk sun imager adopting two-channel atomic light filtering technology is provided, and this imager adopts the atomic light filter of two identical parameters, detects the Zeeman frequency displacement of left-handed rotatory polarization and dextrorotation rotatory polarization in the solar spectrum simultaneously; Adopt four interferometers and four CCD to obtain the high-resolution spectroscopy image (B of four width of cloth sun simultaneously
+, R
+, B
-, R
-), treatedly can obtain full-time brightness, doppler velocity and magnetic field intensity simultaneously.Because four width of cloth images obtain simultaneously, thereby have improved the precision and the quality of solar magnetic field ionization meter effectively; Select Doppler blue shift B and red shift R component with fixing interferometer, simplified system architecture, for sun observation provides a kind of better sniffer.
To achieve these goals, the present invention adopts following technical scheme:
Full solar disk sun imager adopting two-channel atomic light filtering technology is by telescope, optical filter, and λ/4 wave plates, polarizing beam splitter, two atomic light filters, two optical splitters, four interferometers, four CCD and computing machine are formed.
Telescope is with the sunshine collimation of collecting, behind optical filter wiping out background light, keep the light that comprises the sodium light spectrum information, this light is that sunshine is after absorption of solar atmosphere sodium atom and solar magnetic field Zeeman splitting, formed left circularly polarized light and right-circularly polarized light, λ/4 wave plates are transformed into orthogonal polarized light and horizontal polarization light with left circularly polarized light and right-circularly polarized light, and orthogonal polarized light enters first atomic light filter after the polarization beam apparatus transmission; Horizontal polarization light enters second atomic light filter after the polarization beam apparatus reflection.
The light that enters first atomic light filter obtains comprising Doppler's blue shift B after filtering
+With red shift R
+Light, this light is behind first optical splitter, transmitted light enters first interferometer, the first interferometer filtering red shift R
+, blue shift B
+Enter a CCD, obtain the blue shift B of left circularly polarized light
+Reflected light enters second interferometer, the second interferometer filtering blue shift B
+, red shift R
+Enter the 2nd CCD, obtain the red shift R of left circularly polarized light
+
The light that enters second atomic light filter obtains comprising Doppler's blue shift B after filtering
-With red shift R
-Light, this light is behind second optical splitter, transmitted light enters the 3rd interferometer, the 3rd interferometer filtering red shift R
-, blue shift B
-Enter the 3rd CCD, obtain the blue shift B of right-circularly polarized light
-Reflected light enters the 4th interferometer, the 4th interferometer filtering blue shift B
-, red shift R
-Enter the 4th CCD, obtain the red shift R of right-circularly polarized light
-
The one CCD, the 2nd CCD, the 3rd CCD and the 4th CCD arrive computing machine with the information transmission of obtaining, and machine is handled and can be obtained full-time brightness, doppler velocity and magnetic field intensity as calculated.This disposal route is this field disposal route commonly used.
Advantage of the present invention and effect:
Full solar disk sun imager adopting two-channel atomic light filtering technology has realized that a cover system obtains four width of cloth images of sun synchronization simultaneously, treatedly obtains full-time brightness, doppler velocity and magnetic field intensity.Adopt atomic light filter to obtain stable both wings transmission spectral pattern, adopt fixedly interferometer selection Doppler blue shift B and red shift R component, both taken into account the reliable and stable advantage of atomic light filter, have etalon characteristics simply and easily again.All parts are fixedly connected, because of need not the sequential adjustment, both guaranteed that system stability was reliable, simplified system architecture, reduced the adjustment difficulty of system again, make observation quality obtain effective raising, especially improved the precision that solar magnetic field is measured.For the monitoring of sun observation and space weather and forecast provide a kind of better sniffer.
Description of drawings:
Fig. 1 is the full solar disk sun imager adopting two-channel atomic light filtering technology structural representation.
Wherein: 01 telescope, 02 optical filter, 03 λ/4 wave plates, 04 polarizing beam splitter, 05 first atomic light filter, 06 first optical splitter, 07 first interferometer, 08 the one CCD, 09 second interferometer, 10 the 2nd CCD, 11 second atomic light filters, 12 second optical splitters, 13 the 3rd interferometers, 14 the 3rd CCD, 15 the 4th interferometers, 16 the 4th CCD, 17 computing machines.
Left-handed and right-circularly polarized light in Fig. 2 sun sodium absorption line.
Fig. 3 is transformed into vertical and horizontal polarization light behind λ/4 wave plates.
Fig. 4 vertically separates with horizontal polarization light behind polarization beam apparatus.
Fig. 5 becomes the spectrum of both wings transmission peaks behind atomic light filter.
The transmission spectral pattern that four interferometers of Fig. 6 are full-time.
The transmission spectral pattern that Fig. 7 four road CCD receive.
Embodiment:
Below in conjunction with accompanying drawing, the present invention is further illustrated.
Embodiment 1
Full solar disk sun imager adopting two-channel atomic light filtering technology is by telescope 01, optical filter 02, λ/4 wave plates 03,05,11, two optical splitters 06,12 of 04, two atomic light filter of polarizing beam splitter, 07,09,13,15, four CCD 08,10,14,16 of four interferometers and computing machine 17 are formed; Wherein: telescope 01, optical filter 02, λ/4 wave plates 03, polarizing beam splitter 04, first atomic light filter 05, first optical splitter 06, first interferometer 07, a CCD 08 be arranged in co-axial alignment successively; Coaxial successively installation second interferometer 09 and the 2nd CCD 10 on the direction of first optical splitter, 06 reflection optical axis; Coaxial successively installation second atomic light filter 11, second optical splitter 12, the 3rd interferometer 13 and the 3rd CCD 14 on the direction of polarizing beam splitter 04 reflection optical axis; Coaxial successively installation the 4th interferometer 15 and the 4th CCD 16 on the direction of second optical splitter, 12 reflection optical axis; The output terminal of the one CCD 08, the 2nd CCD 10, the 3rd CCD 14 and the 4th CCD 16 is connected with computing machine 17 respectively.
Wherein: described first atomic light filter 05 adopts sodium atom light filter or potassium atom light filter or rubidium atomic light filter or caesium atomic light filter or helium atom light filter, or the calcium atom light filter.
Wherein: described second atomic light filter 11 adopts sodium atom light filter or potassium atom light filter or rubidium atomic light filter or caesium atomic light filter or helium atom light filter or calcium atom light filter.
The workflow of full solar disk sun imager adopting two-channel atomic light filtering technology:
Telescope is with the sunshine collimation of collecting, behind optical filter wiping out background light, keep the light that comprises the sodium light spectrum information, this light is that sunshine is after absorption of solar atmosphere sodium atom and solar magnetic field Zeeman splitting, formed left circularly polarized light and right-circularly polarized light, as shown in Figure 2.λ/4 wave plates are transformed into orthogonal polarized light and horizontal polarization light with left circularly polarized light and right-circularly polarized light, as shown in Figure 3.Orthogonal polarized light enters first atomic light filter after the polarization beam apparatus transmission, shown in Fig. 4 left side; Horizontal polarization light enters second atomic light filter, shown in Fig. 4 right side after the polarization beam apparatus reflection; Atomic light filter is both wings transmission spectral pattern, the spacing 10～30GHz of both wings transmission peaks, transmission bandwidth 1～5GHz.
The light that enters first atomic light filter obtains comprising Doppler's blue shift B after filtering
+With red shift R
+Light, shown in Fig. 5 left side, this light is behind first optical splitter, transmitted light enters first interferometer, shown in Fig. 6 the first from left, the first interferometer filtering red shift R
+, blue shift B
+Enter a CCD, obtain the blue shift B of left circularly polarized light
+, shown in Fig. 7 the first from left; Reflected light enters second interferometer, shown in Fig. 6 the second from left, and the second interferometer filtering blue shift B
+, red shift R
+Enter the 2nd CCD, obtain the red shift R of left circularly polarized light
+, shown in Fig. 7 the second from left;
The light that enters second atomic light filter shown in Fig. 5 right side, obtains comprising Doppler's blue shift B after filtering
-With red shift R
-Light, this light is behind second optical splitter, transmitted light enters the 3rd interferometer, shown in Fig. 6 right side one, the 3rd interferometer filtering red shift R
-, blue shift B
-Enter the 3rd CCD, obtain the blue shift B of right-circularly polarized light
-, shown in Fig. 7 right side one; Reflected light enters the 4th interferometer, shown in Fig. 6 right side two, and the 4th interferometer filtering blue shift B
-, red shift R
-Enter the 4th CCD, obtain the red shift R of right-circularly polarized light
-, shown in Fig. 7 right side two;
The one CCD, the 2nd CCD, the 3rd CCD and the 4th CCD arrive computing machine with the information transmission of obtaining, and machine is handled and can be obtained full-time brightness, doppler velocity and magnetic field intensity as calculated.This disposal route is this field disposal route commonly used.
Whole device is fixing after Installation and Debugging finish, and need not modulation and sequential adjustment in the observation process, and system is simple and reliable.
Claims (3)
1. full solar disk sun imager adopting two-channel atomic light filtering technology, it is characterized in that this imager is made up of telescope (01), optical filter (02), λ/4 wave plates (03), polarizing beam splitter (04), two atomic light filters (05,11), two optical splitters (06,12), four interferometers (07,09,13,15), four CCD (08,10,14,16) and computing machine (17); Wherein: telescope (01), optical filter (02), λ/4 wave plates (03), polarizing beam splitter (04), first atomic light filter (05), first optical splitter (06), first interferometer (07), a CCD (08) be arranged in co-axial alignment successively; Coaxial successively installation second interferometer (09) and the 2nd CCD (10) on the direction of first optical splitter (06) reflection optical axis; Coaxial successively installation second atomic light filter (11), second optical splitter (12), the 3rd interferometer (13) and the 3rd CCD (14) on the direction of polarizing beam splitter (04) reflection optical axis; Coaxial successively installation the 4th interferometer (15) and the 4th CCD (16) on the direction of second optical splitter (12) reflection optical axis; The output terminal of the one CCD (08), the 2nd CCD (10), the 3rd CCD (14) and the 4th CCD (16) is connected with computing machine (17) respectively.
2. full solar disk sun imager adopting two-channel atomic light filtering technology according to claim 1, it is characterized in that, described first atomic light filter (05) adopts sodium atom light filter or potassium atom light filter or rubidium atomic light filter or caesium atomic light filter or helium atom light filter, or the calcium atom light filter.
3. full solar disk sun imager adopting two-channel atomic light filtering technology according to claim 1, it is characterized in that described second atomic light filter (11) adopts sodium atom light filter or potassium atom light filter or rubidium atomic light filter or caesium atomic light filter or helium atom light filter or calcium atom light filter.
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| CN102902075B (en) * | 2012-09-29 | 2014-09-10 | 中国科学院武汉物理与数学研究所 | Compact dual-channel atomic filter |
| CN104180973B (en) * | 2014-09-09 | 2016-10-05 | 中国科学院国家天文台 | A kind of video magnetoheliograph that realizes passes through the Debug on orbit system and method for profile |
| CN107218919A (en) * | 2017-06-15 | 2017-09-29 | 山东师范大学 | A kind of astronomical observation telescope based on light wave red shift |
| CN109300108B (en) * | 2018-07-27 | 2021-06-18 | 昆明理工大学 | Statistical and Gaussian-based day-surface brightness analysis method |
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| CN201548326U (en) * | 2009-08-12 | 2010-08-11 | 中国科学院武汉物理与数学研究所 | Double-channel atom filtering full-disk solar imager |
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