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http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/90618
Title: | 微米球自組裝技術製作無縫圓柱模具及其在滾壓微透鏡陣列的應用 Development of Seamless Cylindrical Mold using Microsphere Self-assembly for Continuous UV Roller Imprinting of Micro-lens Array |
Authors: | 譚其節 Chi-Jei Tan |
Advisor: | 楊申語 Sen-Yeu Yang |
Keyword: | 微透鏡陣列,微壓印製程,滾筒模具製作,浸潤塗佈法,無接縫模具,微米球自組裝技術,UV 光固化,透鏡成像, Micro-lens array,micro imprinting,roller mold fabrication,dip coating method,seamless mold,microsphere self-assembly,UV curing,lens imaging, |
Publication Year : | 2023 |
Degree: | 碩士 |
Abstract: | 微透鏡陣列廣泛應用於具有成像需求的光學、生醫和檢測領域。為了降低微透鏡陣列的生產成本,學界一直在探索各種製作方式。目前普遍採用的方法是微壓印製程,能夠有效地在聚合物薄膜上複製大面積結構。然而,在微壓印製程中,滾筒模具的製作是一個具有挑戰性的核心問題,因為微結構位於曲面,使雷射等直接製作的方式變得更加困難;使用模具包覆方式也會產生接縫,導致壓印時轉
印出不可避免的缺陷。 本篇研究用複製玻璃管壁自組裝微米球製作無接縫透鏡模具:首先,使用浸潤塗佈調整活性劑濃度、管壁溫度、液面降速等參數,將直徑 5 微米的球體堆積於玻璃管內壁上,形成環形自組裝薄膜。接著,將直徑稍小的水溶性 PVA 圓柱體固定在玻璃管中央,PVA 圓柱與烘乾之自組裝微米球玻璃圓管內壁,形成一環型空隙,澆鑄 PDMS 後,即可製作無接縫之環形微透鏡陣列模具。 本研究也設計製作 UV 光固化滾壓機台,使用所製作的模具,進行微透鏡陣列的滾壓翻印。在 PET 膜上塗上 UV 膠,在滾壓中與模具完全接觸後,用紫外光固化。調整紫外光的光照能量,以及轉速的控制,成功的滾壓製作微透鏡陣列。於光學儀器量測下證實能有效的成像。 Micro lens arrays are widely used in optical, biomedical, and inspection fields. Various fabrication methods have been explored to reduce their production cost. The commonly used method is micro imprinting, which replicates large-area structures on polymer films. However, fabricating roller molds is challenging due to the curved surfaces of the microstructures. Using mold coating methods also introduces seams and defects during imprinting. In this study, a seamless micro-lens mold was fabricated using self-assembled microspheres on the replicated glass tube wall. Firstly, the parameters of immersion coating, such as surfactant concentration, wall temperature, and liquid surface descent rate, were adjusted to deposit 5-micrometer diameter spheres onto the inner wall of the glass tube, forming a ring-shaped self-assembled thin film. Next, a slightly smaller diameter water-soluble PVA cylinder was fixed at the center of the glass tube, creating a ring-shaped gap between the PVA cylinder and the dried self-assembled microspheres on the glass tube inner wall. The PDMS was poured and cured in a seamless ring-shaped micro-lens array mold. UV-cured roller imprinting was performed on the micro-lens array using a substrate-covered mold. The UV light exposure energy was tested, and successful replication of the micro lens array was achieved by adjusting the rotation speed. The replicated array showed effective imaging as measured by optical instruments. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/90618 |
DOI: | 10.6342/NTU202302613 |
Fulltext Rights: | 同意授權(限校園內公開) |
Appears in Collections: | 機械工程學系 |
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ntu-111-2.pdf Restricted Access | 8.66 MB | Adobe PDF | View/Open |
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