| 研究生: |
李明洪 Ming-Hung Lee |
|---|---|
| 論文名稱: |
氮化鎵高數值孔徑微透鏡之設計、製作與特性分析 Design, fabrication and testing ofhigh-numerical-aperture GaN microlens |
| 指導教授: |
紀國鐘
Gou-Chung Chi |
| 口試委員: | |
| 學位類別: |
碩士 Master |
| 系所名稱: |
理學院 - 物理學系 Department of Physics |
| 畢業學年度: | 90 |
| 語文別: | 中文 |
| 論文頁數: | 72 |
| 中文關鍵詞: | 灰階光罩聚焦斑點 、氮化鎵 、微透鏡 、數值孔徑 、繞射式光學元件 、折射式光學元件 |
| 外文關鍵詞: | numerical aperture, diffractive optical elements, High-NA, GaN, microlens, DOE''s, gray-level mask, spot size, refractive optical elements, ROE''s |
| 相關次數: | 點閱:13 下載:0 |
| 分享至: |
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摘 要
近年來,微光機電領域發展蓬勃,成為相當熱門的領域。本論文以灰階光罩技術製作繞射式光學元件,以熱熔融方式製作折射式光學元件。以藍光雷射(405nm)量測微透鏡光學性質。此光學元件可應用於光碟機讀寫頭上的物鏡。
論文主要在於說明微透鏡的設計、製作與光學量測。繞射式光學元件設計,採光程差理論﹔以微影製程、灰階光罩技術與感應式耦合電漿蝕刻製作元件﹔並量測其光學性質,如聚焦在焦平面的斑點、焦距與數值孔徑。折射式光學元件設計,採造鏡者理論﹔以微影製程、熱熔融技術與感應式耦合電漿蝕刻製作元件﹔並量測其光學性質,如聚焦在焦平面的斑點、焦距與數值孔徑。光學量測則是將雷射光束通過微透鏡聚焦在CCD上,擷取影像,分析其斑點尺寸大小。量測結果如下:
NA=0.01, aperture=3.6mm, focal length=145mm, spot size=16.3μm
NA=0.05,aperture=1mm, focal length=0.95mm, spot size=4.3μm.
Abstract
Plano-convex diffractive microlenses were fabricated in GaN-based materials with a gray-level mask for the first time. The surface relief of the gray-level diffractive microlens on photoresist was transferred onto GaN by inductively coupled plasma etching technique. The microlenses were characterized with a blue laser diode emitting at 405nm. The focal length of the GaN diffractive microlens is 14.5cm. The potential of the realization of the high-numerical-aperture diffractive microlens in GaN with gray-level mask is discussed.
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