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作者:

Zhang, Yizhuo (Zhang, Yizhuo.) | Wang, Dayong (Wang, Dayong.) (学者:王大勇) | Wang, Yunxin (Wang, Yunxin.) (学者:王云新) | Zhou, Zhiwei (Zhou, Zhiwei.) (学者:周志伟) | Zhao, Jie (Zhao, Jie.)

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摘要:

Digital holography is widely used as a high resolution metrological technique in many domains. As a coherent imaging method, the speckle noise is inherent in the system and degrades image quality and optical resolution. An improved fiber-space-hybrid lensless Fourier-transform digital holography system is proposed. Multiple holograms are recorded with different oblique illumination. All hologram are reconstructed individually using the same program and each reconstructed image has a different speckle pattern. The oblique illumination system is optimized by an automatic two dimensional scanning of the fiber tip. Thus only a limited illumination area of light spot is demanded. By averaging the reconstructed images, the speckle noise of the reconstructed image is reduced. We demonstrate the effectiveness of the technique experimentally. The proposed system is convenient and practical. It can lead to a high quality result automatically.

关键词:

Digital holography speckle noise reduction

作者机构:

  • [ 1 ] [Zhang, Yizhuo]Beijing Univ Technol, Coll Appl Sci, Beijing 100124, Peoples R China
  • [ 2 ] [Wang, Dayong]Beijing Univ Technol, Coll Appl Sci, Beijing 100124, Peoples R China
  • [ 3 ] [Wang, Yunxin]Beijing Univ Technol, Coll Appl Sci, Beijing 100124, Peoples R China
  • [ 4 ] [Zhou, Zhiwei]Beijing Univ Technol, Coll Appl Sci, Beijing 100124, Peoples R China
  • [ 5 ] [Zhao, Jie]Beijing Univ Technol, Coll Appl Sci, Beijing 100124, Peoples R China

通讯作者信息:

  • [Zhang, Yizhuo]Beijing Univ Technol, Coll Appl Sci, Beijing 100124, Peoples R China

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来源 :

SMART NANO-MICRO MATERIALS AND DEVICES

ISSN: 0277-786X

年份: 2011

卷: 8204

语种: 英文

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