Implement of grey-level image diffractive optical elements

碩士 === 中正理工學院 === 電子工程研究所 === 88 === ABSTRACT The diffractive optical elements ( DOEs ) based on basic diffraction theorem have the advantages of small size, light weight, fiexibility and ease of duplication. In this thesis, we use Iterative Fourier Transform algorithm( IFT ) to design...

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Main Authors: Wang Cheng - Te, 王成德
Other Authors: Lu Yi-Bin
Format: Others
Language:zh-TW
Published: 2000
Online Access:http://ndltd.ncl.edu.tw/handle/67118131065553273575
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spelling ndltd-TW-088CCIT04280142015-10-13T11:50:27Z http://ndltd.ncl.edu.tw/handle/67118131065553273575 Implement of grey-level image diffractive optical elements 多階度成像之繞射元件研製 Wang Cheng - Te 王成德 碩士 中正理工學院 電子工程研究所 88 ABSTRACT The diffractive optical elements ( DOEs ) based on basic diffraction theorem have the advantages of small size, light weight, fiexibility and ease of duplication. In this thesis, we use Iterative Fourier Transform algorithm( IFT ) to designed a sample element. After that we make use of the Mean Value Compensation algorithm ( MVC ) and dynamic modify technical to redesigned it. We hope the uniformity of output spots intensity can be modified. On the other way, for the purpose of design a DOE for generating variable intensity spots. We use Single Point Modify algorithm ( SPM ) and dynamic weighting functions to design a greyscale DOE. Besides, we proposed an iterative phase retrieval algorithm based on Discrete Fractional Fourier Transform (DFRT) for designing a binary-phase DOE. We called it: Iterative Discrete Fractional Fourier Transform (IDFRT) method. Using this new approach, we can simplify the design complexity of a Fresnel domain in DOEs, also the on-axis symmetric imaging phenomenon of the DOE designed by the conventional Fourier Transform based algorithm can be avoided. In this work, efficiency, dynamic range and signal to noise ratio are used as the standard to examine the design performance of DOEs. We also clearly explained in detail the fabrication process and steps to successful make our DOE samples. Latter on, we use different equipments and optical systems to measure the geometry profiles and optical performance of our DOEs. Lu Yi-Bin 陸儀斌 2000 學位論文 ; thesis 91 zh-TW
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language zh-TW
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description 碩士 === 中正理工學院 === 電子工程研究所 === 88 === ABSTRACT The diffractive optical elements ( DOEs ) based on basic diffraction theorem have the advantages of small size, light weight, fiexibility and ease of duplication. In this thesis, we use Iterative Fourier Transform algorithm( IFT ) to designed a sample element. After that we make use of the Mean Value Compensation algorithm ( MVC ) and dynamic modify technical to redesigned it. We hope the uniformity of output spots intensity can be modified. On the other way, for the purpose of design a DOE for generating variable intensity spots. We use Single Point Modify algorithm ( SPM ) and dynamic weighting functions to design a greyscale DOE. Besides, we proposed an iterative phase retrieval algorithm based on Discrete Fractional Fourier Transform (DFRT) for designing a binary-phase DOE. We called it: Iterative Discrete Fractional Fourier Transform (IDFRT) method. Using this new approach, we can simplify the design complexity of a Fresnel domain in DOEs, also the on-axis symmetric imaging phenomenon of the DOE designed by the conventional Fourier Transform based algorithm can be avoided. In this work, efficiency, dynamic range and signal to noise ratio are used as the standard to examine the design performance of DOEs. We also clearly explained in detail the fabrication process and steps to successful make our DOE samples. Latter on, we use different equipments and optical systems to measure the geometry profiles and optical performance of our DOEs.
author2 Lu Yi-Bin
author_facet Lu Yi-Bin
Wang Cheng - Te
王成德
author Wang Cheng - Te
王成德
spellingShingle Wang Cheng - Te
王成德
Implement of grey-level image diffractive optical elements
author_sort Wang Cheng - Te
title Implement of grey-level image diffractive optical elements
title_short Implement of grey-level image diffractive optical elements
title_full Implement of grey-level image diffractive optical elements
title_fullStr Implement of grey-level image diffractive optical elements
title_full_unstemmed Implement of grey-level image diffractive optical elements
title_sort implement of grey-level image diffractive optical elements
publishDate 2000
url http://ndltd.ncl.edu.tw/handle/67118131065553273575
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