請用此 Handle URI 來引用此文件：
http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/16211完整後設資料紀錄
| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 蔡睿哲(Jui-che Tsai) | |
| dc.contributor.author | Chih-Chieh Chang | en |
| dc.contributor.author | 張智傑 | zh_TW |
| dc.date.accessioned | 2021-06-07T18:05:14Z | - |
| dc.date.copyright | 2012-08-01 | |
| dc.date.issued | 2012 | |
| dc.date.submitted | 2012-07-26 | |
| dc.identifier.citation | [1] http://en.wikipedia.org/wiki/Barcode
[2] http://en.wikipedia.org/wiki/QR_code [3] K. I. Jolic, M. K. Ghantasala, and E. C. Harvey, “Excimer laser machining of corner cube structures,” Journal of Micromechanics and Microengineering, Vol. 14, pp.388-397, 2004. [4] E. Brinksmeier, R. Glabe, and C. Flucke, “Manufacturing of molds for replication of micro cube corner retro-reflectors,” Production Engineering, Vol. 2, pp. 33-38, 2008. [5] T. Dillon, A. Sure, J. Murakowski, D. Prather, “Continuous-tone grayscale mask fabrication using high-energy-beam-sensitive glass,” Journal of Microlithography, Microfabricaiton, and Microsystems, Vol. 3, No. 4, pp. 550-554, 2004. [6] D. J. Hayes, “Cat’s eye retro-reflector array coding device and method of fabrication,” US 7,152,984 B1, Dec, 26, 2006. [7] W. Royall Cox, Ting Chen, and Donald J. Hayes, “Micro-optics fabrication by ink-jet printers,” Optics and Photonics News, Vol. 12, pp. 32-35, 2001. [8] J. Yao, Z. Cui, F. Gao, Y. Zhang, Y. Guo, C. Du, H. Zeng, C. Qiu, “Refractive micro lens array made of dichromate gelatin with gray-tone photolithography,” Microelectronic Engineering, pp. 729-735, 2001. [9] F. T. O’Neill, J. T. Sheridan, “Photoresist reflow method of micro lens production Part II：Analytic models,” Optik 113, No. 9, pp. 405-419, 2002. [10] C. Peng et al., “High fidelity fabrication of micro lens arrays by nanoimprint using conformal mold duplication and low-pressure liquid material curing,” Journal of Vacuum Science and Technology B, Vol. 25, No.2, 2007. [11] Y. F. Chen, B. J. Yang, Y. J. Lin, K. H. Chao, C. C. Chang, and J. C. Tsai, “Three-leaf trefoil-type MEMS tunable corner cube retro-reflector,” in Proc. 2011 IEEE/LEOS Int. Conf. Opt. MEMS Nanophoton, pp. 181-182, 2011. [12] C. S. Chang, T. S. Chu, L. S. Huang, C. Y. Chang, S. Y. Zeng, M. H. Wen, Y. K. Yen, “A novel addressable switching micro corner cube array for free-space optical application,” Micro Electro Mechanical System, 2003. MEMS-03 Kyoto, pp. 279-282. [13] D. H. Lee and J. Y. Park, “Piezo-electrically actuated micro corner cube retro-reflector (CCR) for free-space optical communication applications,” Journal of Electrical Engineering & Technology, Vol. 5, No. 2, pp. 337-341, 2010. [14] M. K. Kilaru, B. Cumby, and J. Heikenfeld, “Electrowetting retro-reflectors: scalable and wide-spectrum modulation between corner cube and scattering reflection,” Applied Physics Letters, Vol. 94, p.041108, 2009. [15] H. Ren et al., “Tunable-focus microlens arrays using nanosized polymer-dispersed liquid crystal droplets,” Optics Communication, Vol. 247, pp. 101-106, 2005. [16] S. Kuiper and B. H. Hendriks, “Variable-focus liquid lens for miniature cameras,” Applied Physics Letters, Vol. 85, No. 7, 2004. [17] K. H. Jeong, G. L. Liu, N. Chronis and L. P. Lee, “Tunable microdoublet lens array,” Optics Express, Vol. 12, No. 11, 2004. [18] K. H. Chao, C. D. Liao, and J. C. Tsai, “Array of cat’s eye retro-reflectors with modulability for an optical identification system,” in Proc. 2010 IEEE/LEOS Int. Conf. Opt. MEMS Nanophoton, pp. 7-8, 2010. [19] P. G. de Gennes and J. Prost, The Physics of Liquid Crystals, 2nd ed., Clarendon Press, Oxford (1993). [20] 松本正一 角田市良 合著, 劉瑞祥 譯, “液晶之基礎與應用,” 國立編譯館出版(1996). [21] Introduction to Liquid Crystals http://barrett-group.mcgill.ca/tutorials/liquid_ crystal/LC01.htm [22] P. S. Drzaic, “Liquid crystal dispersions,” World Scientific, Singapore, 1995. [23] 蔡佳怡, “摻雜染料液晶聚合物薄膜在光學快速記錄性質之研究, ” 碩士論文,國立成功大學,2002. [24] M. Jiao et al., “Submillisecond response nematic liquid crystal modulators using dual fringe field switching in a vertically aligned cell,” Applied Physics Letters, Vol.92, p.111101, 2008. [25] A. Ghanadzadeh Gilani et al., “Solvatochromism, tautomerism and dichroism of some azoquinoline dyes in liquids and liquid crystals,” Dyes and Pigments, Vol. 92, pp.1320-1330, 2012. [26] https://www.norlandprod.com/adhesives/noa%2065.html [27] K. H. Chao et al., “Fabrication and characterization of a micro tunable cat’s eye retro-reflector,” Optics Communications, Vol. 284, pp. 5221-5224, 2011. | |
| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/16211 | - |
| dc.description.abstract | 回射器在自由空間光學辨識系統中扮演很重要角色，因為透過回射器的特性能增加資料傳輸的安全性及辨識準確率，回射器顧名思義能將入射光沿著同方向反射回去。回射器依照結構不同如稜鏡型(microprism)回射器、corner cube回射器(CCR)以及貓眼回射器(cat’s eyes retro-reflector)等，而有不同的光學特性，在外面市售稜鏡型(microprism)回射器膠帶已經非常常見，但是這種回射器膠帶通常尺寸較大，且回射光應用在大範圍如道路指標、汽機車反光板或是交通安全上還堪用，若要作為光學標籤(optical tag)應用於光學辨識系統中，回射光恐怕沒有較高準確率，且回射器還必需結合調變的機制而且元件輕巧、擁有高解析度，因此本文將介紹能大量製作且具有調變功能的貓眼回射器陣列。
貓眼回射器是由前半部聚焦微透鏡和後半部反射凹面鏡所構成的，而前後模組之間的gap將決定光線是否能順利聚焦於後反射鏡上，再產生反射沿著原方向反射；由文獻可發現前半部微透鏡的調變方式有很多種，如以電濕潤(electrowetting)效應來改變透鏡曲率、以液體或液晶材料構成的微透鏡等，都是用來調變微透鏡的焦距或是曲率半徑，然而，大部分的調變機制都著重在單顆微透鏡，這邊將結合經過設計的高分子分散型液晶(Polymer-dispersed liquid crystal)薄膜於貓眼回射器陣列，透過施加電壓於兩片鍍有ITO (Indium tin oxide)的玻璃基板，產生一電場使液晶分子轉向，進而改變PDLC薄膜的狀態，讓回射光能夠自由調控，藉由改變回射器中不同的像素，以及變換施加電壓的頻率，這個輕薄、製程簡易且可獨立調變的光學裝置能扮演辨識系統中的鑰匙。 | zh_TW |
| dc.description.abstract | In free-space optical identification system, the optical MEMS device called retro-reflector to return the light signal to the original light source is needed for the purpose of increasing security and precise identification. The structures of retro-reflector such as microprism, corner cube, and cat’s eyes retro-reflector have different characteristics. Although the microprism type commercial retro-reflective tape has wide range of application, the most used of the tape is as road signage, vehicle visibility and traffic safety. To realize a tunable optical tag, a device has to combines with modulability mechanism; moreover, to be compact and high resolution in identification system. Therefore, we present a novel method to modulate cat’s eyes retro-reflector in this paper.
The cat’s eyes retro-reflector, which consists of a front lens and back reflecting concave mirror with the gap appropriate for the incident ray focus on the back mirror and return to the direction of incident source. Many methods to modulate micro lens have been reported including electrowetting effect to control the curvature of the lens, lens constituted by liquid crystal or liquid-filled micro lens. However, most works mentioned above are focus on the modulation of single lens rather than array. Here, we introduce a designed PDLC film to switch each pixel of retro-reflector array while an external voltage is applied to glass which is coating ITO, the liquid crystal rotate along the direction of electrical field to change the state of the film. By switching the pixels of retro-reflector and altering the frequency of applied voltage, the compact, simple fabrication procedure, tunable optical device can be used as optical tag in identification system. | en |
| dc.description.provenance | Made available in DSpace on 2021-06-07T18:05:14Z (GMT). No. of bitstreams: 1 ntu-101-R99941095-1.pdf: 7099971 bytes, checksum: 45e92088495163b101bafc3cfbd51b4b (MD5) Previous issue date: 2012 | en |
| dc.description.tableofcontents | 口試委員會審定書 #
誌謝 i 中文摘要 ii ABSTRACT iii 目錄 iv 圖目錄 vi 表目錄 ix 第 1 章 緒論 1 1.1 前言 1 1.2 文獻回顧 2 1.2.1 Corner cube retro-reflector (CCR)種類及介紹 2 1.2.2 貓眼回射器 (Cat’s eye retro-reflector) 種類及介紹 4 1.2.3 回射器 (Retro-reflector) 調變機制 7 1.3 研究動機 12 第 2 章 理論分析 14 2.1 液晶簡介 14 2.1.1 液晶分類 14 2.1.2 高分子分散型液晶薄膜Polymer-dispersed liquid crystal (PDLC)介紹 15 2.2 貓眼回射器分析 17 第 3 章 製作可獨立調變之貓眼回射器陣列 21 3.1 貓眼回射器陣列製作 21 3.1.1 定義 ITO 層特定圖形 21 3.1.2 前聚焦微透鏡陣列 (Micro lens array) 之製作 23 3.1.3 後反射鏡陣列 (Reflecting mirrors array) 之製作 27 3.2 高分子分散型液晶 (PDLC) 薄膜製作 28 3.2.1 液晶材料特性及材料製備 28 3.2.2 玻璃空盒製作及液晶注入 30 3.2.3 高分子分散型液晶 (PDLC) 薄膜測試 31 3.3 元件組裝及整合 32 3.3.1 回射器陣列空盒 (cell) 製作 32 3.3.2 結合高分子分散型液晶 (PDLC) 薄膜之貓眼回射器陣列 34 第 4 章 實驗量測與結果 35 4.1 未結合PDLC之貓眼回射器陣列實驗量測 35 4.1.1 回射效率量測原理 35 4.1.2 回射器特性實驗架構與分析 36 4.2 結合PDLC之貓眼回射器陣列實驗量測與結果 38 4.2.1 調控獨立電極測試 38 4.2.2 回射器獨立調變實驗架構與結果 40 第 5 章 結論與未來展望 44 5.1 結論 44 5.2 未來展望 45 參考文獻 46 | |
| dc.language.iso | zh-TW | |
| dc.subject | 回射器陣列 | zh_TW |
| dc.subject | 貓眼 | zh_TW |
| dc.subject | 光學辨識系統 | zh_TW |
| dc.subject | 高分子分散型液晶 | zh_TW |
| dc.subject | retro-reflector | en |
| dc.subject | cat’s eye | en |
| dc.subject | polymer dispersed liquid crystal | en |
| dc.subject | optical identification | en |
| dc.title | 應用於光學辨識系統之可獨立調變貓眼回射器陣列 | zh_TW |
| dc.title | Independently-Addressed Tunable Cat’s Eye Retro-Reflector Array for an Optical Identification System | en |
| dc.type | Thesis | |
| dc.date.schoolyear | 100-2 | |
| dc.description.degree | 碩士 | |
| dc.contributor.oralexamcommittee | 孫家偉(Chia-Wei Sun),呂志偉(Chih-Wei Lu) | |
| dc.subject.keyword | 貓眼,光學辨識系統,高分子分散型液晶,回射器陣列, | zh_TW |
| dc.subject.keyword | cat’s eye,optical identification,polymer dispersed liquid crystal,retro-reflector, | en |
| dc.relation.page | 47 | |
| dc.rights.note | 未授權 | |
| dc.date.accepted | 2012-07-26 | |
| dc.contributor.author-college | 電機資訊學院 | zh_TW |
| dc.contributor.author-dept | 光電工程學研究所 | zh_TW |
| 顯示於系所單位： | 光電工程學研究所 | |
文件中的檔案：
| 檔案 | 大小 | 格式 | |
|---|---|---|---|
| ntu-101-1.pdf 未授權公開取用 | 6.93 MB | Adobe PDF |
系統中的文件，除了特別指名其著作權條款之外，均受到著作權保護，並且保留所有的權利。