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：《中國科學(xué)院研究生院（長春光學(xué)精密機械與物理研究所）》2012年碩士論文　論文類型：學(xué)位論文

【摘要】：為了實現(xiàn)在地面上對太陽日冕的連續(xù)觀測,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)計的內(nèi)掩式透射地基日冕儀視場為±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1800mm,其中光學(xué)系統(tǒng)長1700mm,焦距為987mm,分辨率為2.8"/pixel,分辨線寬13.5μm。 日冕儀觀測的目標(biāo)為日冕,日冕的亮度對主要來自太陽光球?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)鍵就是消除來自外界及自身雜散光的影響。日冕儀對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)計結(jié)構(gòu)及三類主要的雜光,分別為太陽直射光、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)合超光滑加工實現(xiàn)對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驗對主要的雜散光抑制部件進行定量分析。實驗與理論結(jié)果很好的吻合,當(dāng)三類主要雜散光都得到抑制后,實驗?zāi)軌驅(qū)崿F(xiàn)了對10-6量級日冕目標(biāo)的觀測,說明了日冕儀系統(tǒng)光學(xué)結(jié)構(gòu)設(shè)計的可行性及結(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】：中國科學(xué)院研究生院（長春光學(xué)精密機械與物理研究所）
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2012
【分類號】：TH753.12

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