本文選題：大氣擾動(dòng)　切入點(diǎn)：望遠(yuǎn)鏡　出處：《天文學(xué)報(bào)》2016年03期 　論文類(lèi)型：期刊論文

【摘要】：在天文望遠(yuǎn)鏡系統(tǒng)中,通過(guò)在望遠(yuǎn)鏡內(nèi)部增加一套圖像跟蹤、校正系統(tǒng),降低大氣湍流低頻擾動(dòng)和望遠(yuǎn)鏡跟蹤誤差對(duì)天文觀測(cè)產(chǎn)生的影響,從而保證光路穩(wěn)定,提高系統(tǒng)通光量和觀測(cè)效率.系統(tǒng)工作時(shí)由CCD相機(jī)將星象的圖像信號(hào)發(fā)送給控制計(jì)算機(jī),控制計(jì)算機(jī)通過(guò)軟件算法計(jì)算出實(shí)時(shí)圖像與參考圖像中的星斑中心偏移量,并反饋給快速傾斜鏡控制器,從而控制傾斜鏡快速擺動(dòng),實(shí)現(xiàn)光學(xué)校正過(guò)程.該系統(tǒng)目前已運(yùn)行在國(guó)家天文臺(tái)2.16 m望遠(yuǎn)鏡中,實(shí)際運(yùn)行的測(cè)試數(shù)據(jù)表明,在曝光25 ms情況下,校正平均頻率為15Hz,系統(tǒng)基本可以消除望遠(yuǎn)鏡跟蹤誤差的影響,大氣湍流的擾動(dòng)影響有一定改善,觀測(cè)效率提高了約15%.
[Abstract]:In the astronomical telescope system, by adding a set of image tracking and correcting system inside the telescope, the influence of atmospheric turbulence low frequency disturbance and telescope tracking error on astronomical observation is reduced, so as to ensure the stability of the optical path. When the system is working, the CCD camera transmits the image signal of the star image to the control computer, and the computer calculates the deviation of the spot center between the real time image and the reference image by the software algorithm. The system is fed back to the fast tilting mirror controller to control the rapid swinging of the tilting mirror and realize the optical correction process. The system has been running in the 2.16m telescope of the National Observatory at present. The actual test data show that under the condition of 25 Ms exposure, The average frequency of correction is 15Hz. The system can basically eliminate the influence of telescope tracking error. The disturbance effect of atmospheric turbulence is improved to some extent and the observation efficiency is improved by about 15Hz.
【作者單位】： 中國(guó)科學(xué)院國(guó)家天文臺(tái)/南京天文光學(xué)技術(shù)研究所;中國(guó)科學(xué)院天文光學(xué)技術(shù)重點(diǎn)實(shí)驗(yàn)室;中國(guó)科學(xué)院大學(xué);
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(11273038)資助
【分類(lèi)號(hào)】：P111.2

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