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Title: | 基於四波橫向剪切干涉術與結構光調制之微分干涉對比顯微術之研究 Research on Differential Interference Contrast(DIC)Microscopy Based on Quadriwave Lateral Shearing Interferometry and Structured-Light Modulation |
Other Titles: | Research on Differential Interference Contrast(DIC)Microscopy Based on Quadriwave Lateral Shearing Interferometry and Structured-Light Modulation |
Authors: | 楊浩麾 Haohui Yang |
Advisor: | 陳亮嘉 Liang-Chia Chen |
Keyword: | 微分干涉對比,結構光,快速量測,四波橫向剪切干涉,三維形貌量測,傅立葉條紋分析, Differential interference contrast (DIC),Structured-light,3D surface measurement,Quadri-wave lateral shearing interferometry,3-dimensional profiling,Fourier fringe analysis, |
Publication Year : | 2022 |
Degree: | 碩士 |
Abstract: | 光學量測作爲一種便捷的觀測、量測方式,具有非接觸式量測、可快速檢測等優點,被廣範用於生物科學觀測、工業產品量測等領域。其中微分干涉對比顯微術(Differential interference contrast microscopy)由於其自參照、共路徑光路架設的系統特性,具有較強的抗振、抗環境擾動能力,在實際工業中尤其是對於半導體製造中對階高的量測上有著廣泛的應用。然而在傳統DIC干涉儀中,需要進行兩次正交方向上的剪切干涉量測,通過這兩次量測來獲得兩正交方向上的梯度變化資訊,再藉由相位展開、相位積分演算法進行三維形貌還原,系統結構複雜且两次成像间待测物局域坐標需要对正,耗費較多時間。
為了增加檢測速度,簡化系統結構,本研究旨在通過四波橫向剪切干涉的概念,通過剪切稜鏡對待測物四個方向剪切波前的干涉,同時獲得對兩個正交方向的梯度資訊。結合傅立葉條紋分析演算法,將干涉相位資訊通過沿梯度方向積分獲得待測物的三維表面形貌,實現在不改變光機系統結構、不需改變成像系統與待測物相對位置即可快速獲取表面形貌資訊的DIC光學量測系統。 As a convenient method of observation and measurement, optical measurement has the advantages of non-contact measurement and rapid detection. It is widely used in the fields of biological science observation and industrial product measurement. Among them, differential interference contrast microscopy has strong anti-vibration capability and environmental disturbance capability due to its self-referencing and common path optical path erection system characteristics. It is used in the actual industry, especially for high-order measurements in semiconductor manufacturing. Wide range of applications. However, in the traditional DIC interferometer, it is necessary to perform two orthogonal shearing interference measurements. Through these two measurements, the gradient change information in the two orthogonal directions is obtained, and then the phase expansion and phase integral calculation are used. The method is used to restore the three-dimensional topography. The system structure is complex and the local coordinates of the object need to be aligned between two images, which takes a lot of time. To increase the detection speed and simplify the system structure, this research aims to use the concept of Quadriwave lateral shearing interference through the shearing prism to interfere with the shear wavefront of the object to be measured in four directions and to obtain gradient information in two orthogonal directions simulataneously. Combined with the Fourier fringe analysis algorithm, the interference phase information can be integrated along the gradient direction to obtain the three-dimensional surface topography of the test object so that the optical-mechanical system structure and the relative position between the imaging system and the object can remain unchanged. A DIC optical measurement was successfully developed for reconstructing surface topography in an one-shot manner. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/83139 |
DOI: | 10.6342/NTU202210117 |
Fulltext Rights: | 同意授權(全球公開) |
Appears in Collections: | 機械工程學系 |
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U0001-1256221208262736.pdf | 13.24 MB | Adobe PDF | View/Open |
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