Special Section on Speckle-Based Metrology

Coherent noise reduction of reconstruction of digital holographic microscopy using a laterally shifting hologram aperture

[+] Author Affiliations
Yun Liu

Xi’an Jiaotong University, School of Mechanical Engineering, No. 28, Xianning West Road, Xi’an 710049, China

Xi’an University of Technology, School of Mechanical and Precision Instrument Engineering, No. 5, South Jinhua Road, Xi’an 710048, China

Zhao Wang, Junhui Huang, Jiansu Li, Yang Zhang, Xumeng Li

Xi’an Jiaotong University, School of Mechanical Engineering, No. 28, Xianning West Road, Xi’an 710049, China

Jianmin Gao

Xi’an Jiaotong University, State Key Laboratory for Manufacturing Systems Engineering, No. 28, Xianning West Road, Xi’an 710049, China

Opt. Eng. 55(12), 121725 (Aug 22, 2016). doi:10.1117/1.OE.55.12.121725
History: Received April 30, 2016; Accepted July 28, 2016
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Abstract.  The coherent noise appears in the constructed image of digital holographic microscopy due to the laser source; thus, the imaging quality is degraded. A method of coherent noise reduction using a laterally shifting hologram aperture is presented. An original hologram with coherent noise is captured by a camera first. A series of holograms are sampled by laterally shifting the digital aperture in the original hologram. Instead of extracting the specimen’s part information, each sampled hologram, which includes the whole specimen, is reconstructed. The coherent noise is reduced by averaging the different reconstructed images. The experiment demonstrates the feasibility of the approach. The presented approach with a single recorded hologram realizes the coherent noise reduction without loss of spatial resolution, which is useful for real-time measurement.

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© 2016 Society of Photo-Optical Instrumentation Engineers

Citation

Yun Liu ; Zhao Wang ; Junhui Huang ; Jianmin Gao ; Jiansu Li, et al.
"Coherent noise reduction of reconstruction of digital holographic microscopy using a laterally shifting hologram aperture", Opt. Eng. 55(12), 121725 (Aug 22, 2016). ; http://dx.doi.org/10.1117/1.OE.55.12.121725


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