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Sinusoidal wavelength-scanning interferometer for measurement of thickness and surface profile of thin films
http://hdl.handle.net/10191/27483
http://hdl.handle.net/10191/27483862d84ca-1dfa-4d86-951d-5cef08221e95
名前 / ファイル | ライセンス | アクション |
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6024_602409.pdf (519.9 kB)
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Item type | 会議発表論文 / Conference Paper(1) | |||||
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公開日 | 2014-06-20 | |||||
タイトル | ||||||
タイトル | Sinusoidal wavelength-scanning interferometer for measurement of thickness and surface profile of thin films | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Sinusoidal wavelength-scanning interferometer for measurement of thickness and surface profile of thin films | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Interferometer | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | surface profile | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | thickness | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | wavelength-scanning | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | sinusoidal phase-modulation | |||||
資源タイプ | ||||||
資源 | http://purl.org/coar/resource_type/c_5794 | |||||
タイプ | conference paper | |||||
著者 |
Akiyama, Hisashi
× Akiyama, Hisashi× Sasaki, Osami× Suzuki, Takamasa |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | We propose a sinusoidal wavelength scanning interferometer for measuring thickness and surfaces profiles with a thin film. An acousto-optic tunable filter (AOTF) is used to produce sinusoidally wavelength-scanned light from a superluminescent laser diode (SLD) with a wide spectral bandwidth of 46nm. The interference signal contains an amplitude Zb of a time-varying phase and a constant phase α. Two measured values of OPD, which are denoted by Lz and Lα, are obtained from Zb and α. By combining Lz and Lα, an OPD longer than a wavelength is measured with an error less than a few nanometers. When the object has two reflective surfaces, the detected interference signal contains two interference signals which are caused by the front and rear surfaces. In this case we must determine the values of Zb1, Zb2, α1, and α2, where suffixes of 1 and 2 are corresponding to the front and rear surfaces, respectively. We define an error function that is the difference between the detected signal and the theoretical signal, and reduce the value of the error function with the multidimensional nonlinear least-squares algorithm to search the values of Zb1, Zb2, α1, and α2. Experimental results show that the thickness and surfaces profiles of a silica glass plate of 20μm-thickness are measured with error less than 1.5nm. | |||||
内容記述 | ||||||
内容記述タイプ | Other | |||||
内容記述 | ICO20: optical devices and instruments : 21-26 August 2005 : Changchun, China. : Aug 2005, Changchun, China | |||||
書誌情報 |
Proceedings of SPIE - the International Society for Optical Engineering en : Proceedings of SPIE - the International Society for Optical Engineering 巻 6024, p. 602409-1-602409-6, 発行日 2005-08 |
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出版者 | ||||||
出版者 | International Society for Optical Engineering, SPIE | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 0277786X | |||||
書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA10619755 | |||||
DOI | ||||||
識別子タイプ | DOI | |||||
関連識別子 | info:doi/10.1117/12.666811 | |||||
権利 | ||||||
権利情報 | Copyright 2006 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited. | |||||
著者版フラグ | ||||||
値 | publisher |