| 研究生: |
鄒永桐 Yong-Tong Zou |
|---|---|
| 論文名稱: |
薄膜相位式光學低通濾波器之研究 Making Optical Low-pass Filter by Thin-film Phase Grating |
| 指導教授: |
李正中
Cheng-Chung Lee |
| 口試委員: | |
| 學位類別: |
碩士 Master |
| 系所名稱: |
理學院 - 光電科學與工程學系 Department of Optics and Photonics |
| 畢業學年度: | 93 |
| 語文別: | 中文 |
| 論文頁數: | 59 |
| 中文關鍵詞: | 相位光柵 、薄膜 、疊紋 、光柵式光學低通率波器 |
| 外文關鍵詞: | thin film, moiré, phase grating, grating optical low-pass filter, CCD, MTF |
| 相關次數: | 點閱:8 下載:0 |
| 分享至: |
| 查詢本校圖書館目錄 查詢臺灣博碩士論文知識加值系統 勘誤回報 |
在人們對於影像品質越來越重視的今天,影像的柔化日趨受到重視,但是在高品質的背後是所費不貲的,如何得到便宜品質又好的影像是本文研究的重點。
為解決此一問題,本論文提出理用薄膜的製程製作相位式的光柵可以當作光學低通率波器,置於CCD(Charge Couple Device)前,可以消除偽訊號等高頻雜訊,使影像趨於逼真,以解決因為使用晶體當作低通率波器產生不利於系統縮小化及成本昂貴的問題。
A new method utilizing the technique of coating process was applied to make a grating optical low-pass filter (GOLF). Using a metal mesh as a mask, the thin-film phase grating was fabricated with an advantage of simple and process for a mass-production. The modulation transfer function (MTF) was measured and proved it was agree well with the theoretical calculation. The GOLF was installed to a digital camera to take pictures of the circular zone plane (CZP) to show the ability of suppression of a Moiré pattern.
1. J. W. Goodman, Introduction to Fourier Optics, (McGraw-Hill, New York, 1996), 22-27.
2. Y. Ogawa, Y. Nakada, H. Yasui, and S. Ochi, “Development of CCD image block for single chip color camera”, IEEE Transactions on Consumer Electronics CE-31, 405-413 (1985).
3. J. E. Greivenkamp, “Color dependent optical prefilter for the suppression of aliasing artifacts”, Appl. Opt. 29, 676-684 (1990).
4. G. W. Euliss and J. van der Gracht, “Information-Theoretic Analyses of a Birefringent Blur Filter”, Appl. Opt. 40, 6492-6504 (2001).
5. R. L. Townsend, “Spatial-frequency filter for a Kell-type color camera”, Appl. Opt. 11, 2463-1972 (1972).
6. F. Katsuya, U. Masao, and N. Yasuaki, “Grating optical low-pass filter”, Japanese Journal of Applied Physics: Part 1 35, 1768-1776 (1996).
7. C. S. Go, S. Lim, S. Kim, J. C. Lee, and Y. H. Oh, “The modeling and the optimization of a grating optical low-pass filter”, Applied Physics B: Lasers and Optics 73, 721-725 (2001).
8. G. R. Fowles, Introduction to Modern Optics, (Holt, Rinehart and Winston, New York, 1975), 108-122.
9. C. S. Go, S. Lim, S. Kim, J. C. Lee, and Y. H. Oh, “The filtering characteristics of simple grating optical low-pass filters”, Applied Physics B: Lasers and Optics 74, 563-567 (2002).
10. J. W. Goodman, Introduction to Fourier Optics, (McGraw-Hill, New York, 1996), 106.
11. J. W. Goodman, Introduction to Fourier Optics, (McGraw-Hill, New York, 1996), 138-139.
12. J. W. Goodman, Introduction to Fourier Optics, (McGraw-Hill, New York, 1996), 143.
13.魏敬易著, “影像柔化處理”, 中央大學光電所碩士論文, (1998).