本文關(guān)鍵詞： 內(nèi)掩式透射地基日冕儀 雜散光 結(jié)構(gòu)性遮攔 二次成像　出處：《中國(guó)科學(xué)院研究生院（長(zhǎng)春光學(xué)精密機(jī)械與物理研究所）》2012年碩士論文　論文類型：學(xué)位論文

【摘要】：為了實(shí)現(xiàn)在地面上對(duì)太陽(yáng)日冕的連續(xù)觀測(cè),地基日冕儀的出現(xiàn)滿足了人類的這種需求。地基日冕儀是人為通過(guò)儀器的結(jié)構(gòu)遮攔造成類似日全食影像的成像儀器。本文設(shè)計(jì)的內(nèi)掩式透射地基日冕儀視場(chǎng)為±1.1-3R(?),約為±48’,系統(tǒng)工作波段為530-555nm,口徑120mm,系統(tǒng)F數(shù)為8.2,系統(tǒng)總長(zhǎng)1800mm,其中光學(xué)系統(tǒng)長(zhǎng)1700mm,焦距為987mm,分辨率為2.8"/pixel,分辨線寬13.5μm。 日冕儀觀測(cè)的目標(biāo)為日冕,日冕的亮度對(duì)主要來(lái)自太陽(yáng)光球?qū)拥目梢姽舛詷O其微弱,所以地基日冕儀光學(xué)系統(tǒng)的關(guān)鍵就是消除來(lái)自外界及自身雜散光的影響。日冕儀對(duì)雜散光有非常高的抑制要求。為了提高日冕儀的雜散光抑制水平及成像質(zhì)量,本文分析了地基日冕儀的光學(xué)設(shè)計(jì)結(jié)構(gòu)及三類主要的雜光,分別為太陽(yáng)直射光、入射口徑光闌的邊緣衍射光、物鏡組內(nèi)表面多次反射光及光學(xué)材料的內(nèi)部雜質(zhì)和折射率不均勻性引入的雜散光。運(yùn)用二次成像理論及光闌的共軛關(guān)系,并結(jié)合超光滑加工實(shí)現(xiàn)對(duì)以上主要雜散光的高效能抑制。 基于日冕儀雜散光的成像及遮攔理論,并結(jié)合超凈間中的模擬成像實(shí)驗(yàn)對(duì)主要的雜散光抑制部件進(jìn)行定量分析。實(shí)驗(yàn)與理論結(jié)果很好的吻合,當(dāng)三類主要雜散光都得到抑制后,實(shí)驗(yàn)?zāi)軌驅(qū)崿F(xiàn)了對(duì)10-6量級(jí)日冕目標(biāo)的觀測(cè),說(shuō)明了日冕儀系統(tǒng)光學(xué)結(jié)構(gòu)設(shè)計(jì)的可行性及結(jié)構(gòu)遮攔的有效性,滿足了日冕儀的設(shè)計(jì)要求。
[Abstract]:In order to realize the continuous observation of the solar corona on the ground. The appearance of the ground-based coronometers satisfies the needs of human beings. The ground-based coronometers are an imaging instrument which creates a similar image of the total solar eclipse by means of the structure of the apparatus. The field of view of the ground-based coronometers designed in this paper is 鹵. 1.1-3R (. ? The operating band of the system is 530-555nm, the aperture is 120mm, the F number of the system is 8.2, the total length of the system is 1800mm, and the optical system length is 1700mm. The focal length is 987 mm, the resolution is 2.8 "pixel, the resolution is 13.5 渭 m. The corona is the object of the corona, and the brightness of the corona is extremely weak for the visible light, which comes mainly from the solar photosphere. Therefore, the key of the optical system of the ground-based coronometers is to eliminate the influence of the stray light from the outside world and their own. The coronal apparatus has a very high demand for the suppression of stray light. In order to improve the level of stray light suppression and the imaging quality of the coronal instrument. In this paper, the optical design structure of the ground-based coronometers and three main types of stray light are analyzed, which are the direct solar light and the edge diffracted light of the incident aperture aperture. Multiple reflections from the internal surface of the objective group and stray light from the internal impurity and refractive index inhomogeneity of the optical material. The theory of secondary imaging and the conjugate relation of the aperture are used. Combined with ultra-smooth processing, the high performance suppression of the main stray light above can be realized. Based on the imaging and blocking theory of coronal stray light, and combined with the simulation imaging experiment in super-clean space, the main stray light suppression components are quantitatively analyzed. The experimental results are in good agreement with the theoretical results. When the three kinds of main stray light are suppressed, the experimental results show the feasibility of the optical structure design of the coronal instrument system and the effectiveness of the structure blocking. The design requirements of coronal apparatus are satisfied.
【學(xué)位授予單位】：中國(guó)科學(xué)院研究生院（長(zhǎng)春光學(xué)精密機(jī)械與物理研究所）
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2012
【分類號(hào)】：TH753.12

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