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http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/87225
標題: | 整合雙層孔徑與微透鏡陣列之結構應用在指紋辨識上 Integrating the structure of double-layer aperture and microlens array for fingerprint recognition |
作者: | 葉智傑 Chih-Chieh Yeh |
指導教授: | 蘇國棟 Guo-Dong Su |
關鍵字: | 光學式屏下指紋辨識,熱回熔,微透鏡陣列,黑色矩陣,孔徑濾波,影像二元化處理, optical under-screen fingerprint recognition,thermal reflow,microlens array,black matrix,aperture filter,image binarization processing, |
出版年 : | 2023 |
學位: | 碩士 |
摘要: | 在資訊交流發達的社會中,個人的隱私保護是不可或缺的。在眾多生物辨識的技術中,指紋辨識是歷史最悠久也最被廣泛使用。其中全屏幕指紋辨識技術,是近年來智慧型手機發展的重要項目之一。本實驗室以光學式屏下指紋辨識系統做為主軸,將手機裝置與濾訊結構結合,以達到更清晰的指紋影像。在這篇論文中,濾訊結構以微透鏡陣列以及兩層孔徑陣列組合而成,微透鏡陣列負責將指紋訊號聚焦在特定的光感測器像素上,增加感測器所接受到的訊號強度;而孔徑陣列則是做為黑色矩陣,以濾除不要的雜訊光,使影像更加清晰。
本論文使用ZEMAX光線追跡軟體,模擬指紋的反射光透過濾訊結構聚焦在感測器上的效果。並利用半導體工業的黃光微影技術以及微透鏡製程的熱回熔技術,成功製作出此微光學結構。最後架設光路量測指紋經過自製的結構後的指紋成像,並在感測器上獲得肉眼可辨別的指紋圖案。更利用程式將指紋影像做二元化處理,證實拍攝到的影像是指紋的圖案。 In a society where information exchange is developed, personal privacy protection is indispensable. Among many biometric technologies, fingerprint recognition is the oldest and most widely used. Among them, the full-screen fingerprint recognition technology is one of the important projects in the development of smart phones in recent years. This laboratory takes the optical under-screen fingerprint recognition system as the main core, and combines the mobile phone device with the filter structure to achieve a clearer fingerprint image. In this paper, the filter structure is composed of a microlens array and a two-layer aperture array. The microlens array is responsible for focusing the fingerprint signal on a specific photosensor pixel to increase the signal intensity received by the sensor; while the aperture array is used as a black matrix to filter out unwanted noise light and make the image clearer. This thesis used the ZEMAX ray tracing software to simulate the effect of the reflected light of the fingerprint passing through the filtering structure and focusing on the sensor. And we used yellow light lithography technology in the semiconductor industry and thermal reflow technology in the microlens process, the micro-optical structure was successfully produced. Finally, an optical path was set up to measure the fingerprint image after the fingerprint passes through the self-made structure, and a fingerprint pattern recognizable by the naked eye is obtained on the sensor. The fingerprint image was binarized by the program to confirm that the captured image is the pattern of the fingerprint. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/87225 |
DOI: | 10.6342/NTU202300579 |
全文授權: | 同意授權(限校園內公開) |
電子全文公開日期: | 2028-02-16 |
顯示於系所單位: | 光電工程學研究所 |
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ntu-111-1.pdf 目前未授權公開取用 | 2.98 MB | Adobe PDF | 檢視/開啟 |
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