Single-exposure phase-shifting digital holography using a random-complex-amplitude encoded reference wave

使用随机复振幅编码参考波的单次曝光相移数字全息术

• 批准号: 23560039
• 负责人: NOMURA Takanori
• 金额: $ 3.33万
• 依托单位: Wakayama University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2011
• 资助国家: 日本
• 起止时间: 2011 至 2013
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23560039/
• 关键词: ディジタルオプティクス; 情報フォトニクス; 位相シフト法; 干渉計測; ディジタルホログラフィ; 波面分割; 瞬時記録; スペックル; ランダム位相光; 選択アルゴリズム

The improved single-exposure phase-shifting digital holography using a random-phase reference wave is proposed. The algorithm for obtaining a complex amplitude of an object wave is improved. In the proposed algorithm, the reference wave is treated as not a random-phase but a random-complex-amplitude. Therefore, the algorithm uses proper amplitude information of the reference wave. Furthermore, the appropriate reference wave in single-exposure phase-shifting digital holography using a random-complex- amplitude encoded reference wave is experimentally investigated. Although the reference wave is generalized, the quality of reconstructed images depends on it. When the reference wave satisfies a certain condition, reconstructed images cannot be obtained in this method. After the certain condition is presented, the appropriate condition is studied using a speckle property. Experimental results are given to confirm the proposed method.

提出了一种改进的采用随机相位参考波的单次曝光相移数字全息术。改进了求取目标波复振幅的算法。在该算法中，参考波不是随机相位，而是随机复幅度。因此，该算法使用了适当的参考波的幅度信息。在此基础上，实验研究了随机复幅度编码参考波在单次曝光相移数字全息中的合适参考波。虽然参考波是广义的，但重建图像的质量取决于它。当参考波满足一定条件时，这种方法不能获得重建图像。在给出了确定的条件后，利用散斑性质研究了合适的条件。给出了实验结果，验证了该方法的有效性。

项目成果

ディジタルホログラフィックトモグラフィによる屈折率断層計測のための光波伝搬を用いた断層再構成計算手法

利用光波传播进行数字全息断层扫描折射率断层扫描测量的断层重建计算方法

• 发表时间: 2012
• 作者: 北澤貴宏;野村孝徳
• 通讯作者: 野村孝徳

Single- exposure generalized phase-shifting digital holog- raphy

单次曝光广义相移数字全息术

• 发表时间: 2012
• 作者: M. Ieda;T. Ishimaru;S. Ono;Y. Yokota;T. Yanagida;A. Yoshikawa;Takanori Nomura and Masatoshi Imbe
• 通讯作者: Takanori Nomura and Masatoshi Imbe

Automated reconstruction and noise reduction of three-dimensional objects encoded in digital holograms

数字全息图中编码的三维物体的自动重建和降噪

• 发表时间: 2013
• 作者: Masatoshi Imbe;Daireann Neylon;Tomi Pitkaaho;Takanori Nomura;and Thomas J. Naughton
• 通讯作者: and Thomas J. Naughton

Refractive index & physical thickness distributions measurement and consideration of dependence of measurement accuracy on scanning interval using low-coherence digital holography

• DOI: 10.1109/sii.2013.6776608
• 发表时间: 2013-12
• 期刊: Proceedings of the 2013 IEEE/SICE International Symposium on System Integration
• 作者: Kaho Watanabe;T. Nomura

Dynamic recording and reconstruction in single-exposure generalized phase-shifting digital holography

单次曝光广义相移数字全息的动态记录与重建

• 发表时间: 2012
• 作者: Y. Yamashita;H. Yoshikawa;T. Chikyo;and K. Kobayashi;Masatoshi IMBE and Takanori NOMURA
• 通讯作者: Masatoshi IMBE and Takanori NOMURA