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http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/69123完整後設資料紀錄
| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 曾雪峰 | |
| dc.contributor.author | Jia-Hao Li | en |
| dc.contributor.author | 李家豪 | zh_TW |
| dc.date.accessioned | 2021-06-17T03:09:25Z | - |
| dc.date.available | 2018-08-08 | |
| dc.date.copyright | 2018-08-08 | |
| dc.date.issued | 2018 | |
| dc.date.submitted | 2018-07-23 | |
| dc.identifier.citation | [1] T. Freegard, 'The physical basis of transparency of the normal cornea,' Eye, vol. 11, pp. 465-471, 1997.
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| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/69123 | - |
| dc.description.abstract | 膠原纖維 (collagen fibril)在人體中十分常見，其光學特性為不透明。角膜與眼白兩者均由膠原纖維束組成，鞏膜呈現不透明的白色，但角膜卻是透明。利用時域擬光譜法（pseudospectral time-domain, PSTD）技術，模擬光傳播經過角膜與眼白模型之光學特性，分析不同變因對穿透率有如何的影響。接下來的章節中，會先探討厚度與入射波長對穿透率之影響；接著利用雷達散射截面 (radar cross-section, RCS) 來分析兩種模型的散射光特性；最後進一步考慮水造成的影響考慮進去，與真實實驗中，角膜與眼白之穿透率進行比較。 | zh_TW |
| dc.description.abstract | Both consist of collagen fibrils, sclera is opaque whereas cornea is transparent for optical wavelengths. By employing the pseudospectral time-domain (PSTD) simulation technique, we measured and analyze the scattering characteristics of light of the cornea and sclera with different sizes and arrangements of the non-bsorbing collagen fibrils. Various factors are analyzed, including the wavelength of incident light, the thickness of the scattering media, position and size distribution of the collagen fibrils. Simulation results show the arrangement of collagen fibrils and the wavelength of incident light interrelated with the transmittance. | en |
| dc.description.provenance | Made available in DSpace on 2021-06-17T03:09:25Z (GMT). No. of bitstreams: 1 ntu-107-R05941048-1.pdf: 2998186 bytes, checksum: 5337ce43ea1e51869038cf792c9b6dba (MD5) Previous issue date: 2018 | en |
| dc.description.tableofcontents | CONTENTS
口試委員會審定書 ........................................................................................................... # 誌謝 ................................................................................................................................... i 中文摘要 .......................................................................................................................... ii ABSTRACT .................................................................................................................... iii CONTENTS .................................................................................................................... iv LIST OF FIGURES ......................................................................................................... vi Chapter 1 簡介............................................................................................................ 1 1.1 角膜與眼白之結構與光學特性 .................................................................... 1 1.2 研究動機 ........................................................................................................ 5 Chapter 2 時域擬光譜法 ........................................................................................... 6 2.1 時域擬光譜法 ................................................................................................ 6 2.2 吸收邊界條件： 單 軸完美匹配層 (Uniaxial Perfectly Matched Layer Absorption Boundary Condition, UPML ABC) ........................................... 10 Chapter 3 模擬參數.................................................................................................. 17 3.1 相對折射率 .................................................................................................. 17 3.2 模擬空間與參數 .......................................................................................... 20 3.3 模擬模型 ...................................................................................................... 23 Chapter 4 模擬結果與分析 ..................................................................................... 25 4.1 穿透率之計算 .............................................................................................. 25 4.2 介質厚度對穿透率之影響 .......................................................................... 28 4.3 雷達散射截面 (Radar cross-section, RCS) ................................................. 32 4.3.1 近場遠場轉換 (Near-to-Far-Field Transformation, NTFF) .............. 32 4.3.2 雷達散射截面 (Radar cross-section, RCS) 分析 ............................. 39 4.4 入射光波長對穿透率之影響 ...................................................................... 42 4.5 水吸收率對穿透率之影響 .......................................................................... 44 4.5.1 不同波長之水吸收率 ......................................................................... 44 4.5.2 吸收率與穿透率間的關係 ................................................................. 45 4.5.3 考慮水吸收率後之穿透率 ................................................................. 47 Chapter 5 結論與未來展望 ..................................................................................... 50 5.1 結論 .............................................................................................................. 50 5.2 未來展望 ...................................................................................................... 51 REFERENCE .................................................................................................................. 53 | |
| dc.language.iso | zh-TW | |
| dc.subject | 膠原纖維 | zh_TW |
| dc.subject | 角膜 | zh_TW |
| dc.subject | 眼白 | zh_TW |
| dc.subject | 穿透率 | zh_TW |
| dc.subject | 時域擬光譜法 | zh_TW |
| dc.subject | 雷達散射截面 | zh_TW |
| dc.subject | 角膜與眼白的水吸收率 | zh_TW |
| dc.subject | RCS | en |
| dc.subject | collagen fibrils | en |
| dc.subject | cornea | en |
| dc.subject | sclera | en |
| dc.subject | transmittance | en |
| dc.title | 時域擬光譜法模擬分析角膜與眼白結構對光穿透特性的影響 | zh_TW |
| dc.title | PSTD simulation analysis of the transmittance of corneal and scleral scattering medium | en |
| dc.type | Thesis | |
| dc.date.schoolyear | 106-2 | |
| dc.description.degree | 碩士 | |
| dc.contributor.oralexamcommittee | 駱遠,陳世慧 | |
| dc.subject.keyword | 膠原纖維,角膜,眼白,穿透率,時域擬光譜法,雷達散射截面,角膜與眼白的水吸收率, | zh_TW |
| dc.subject.keyword | collagen fibrils,cornea,sclera,transmittance,RCS, | en |
| dc.relation.page | 54 | |
| dc.identifier.doi | 10.6342/NTU201801348 | |
| dc.rights.note | 有償授權 | |
| dc.date.accepted | 2018-07-23 | |
| 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 | |
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