Dynamic Speckle Illumination Digital Holographic Microscopy by Doubly Scattered System

Yun Liu; Peihua Bu; Mingxing Jiao; Junhong Xing; Ke Kou; Tianhong Lian; Xian Wang; Yumeng Liu

doi:10.3390/photonics8070276

Photonics (Jul 2021)

Dynamic Speckle Illumination Digital Holographic Microscopy by Doubly Scattered System

Yun Liu,
Peihua Bu,
Mingxing Jiao,
Junhong Xing,
Ke Kou,
Tianhong Lian,
Xian Wang,
Yumeng Liu

Affiliations

Yun Liu: Key Lab of NC Machine Tools and Integrated Manufacturing Equipment of the Education Ministry & Key Lab of Mechanical Manufacturing Equipment of Shaanxi Province, Xi’an University of Technology, Xi’an 710048, China
Peihua Bu: School of Mechanical and Precision Instrument Engineering, Xi’an University of Technology, Xi’an 710048, China
Mingxing Jiao: School of Mechanical and Precision Instrument Engineering, Xi’an University of Technology, Xi’an 710048, China
Junhong Xing: School of Mechanical and Precision Instrument Engineering, Xi’an University of Technology, Xi’an 710048, China
Ke Kou: School of Mechanical and Precision Instrument Engineering, Xi’an University of Technology, Xi’an 710048, China
Tianhong Lian: School of Mechanical and Precision Instrument Engineering, Xi’an University of Technology, Xi’an 710048, China
Xian Wang: School of Mechanical and Precision Instrument Engineering, Xi’an University of Technology, Xi’an 710048, China
Yumeng Liu: School of Mechanical and Precision Instrument Engineering, Xi’an University of Technology, Xi’an 710048, China

DOI: https://doi.org/10.3390/photonics8070276
Journal volume & issue: Vol. 8, no. 7
p. 276

Abstract

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The coherent noise always exists in digital holographic microscopy due to the laser source, degrading the image quality. A method of speckle suppression using the dynamic speckle illumination, produced by double-moving diffusers, is presented in digital holographic microscopy. The space–time correlation functions are theoretically analyzed from the statistics distribution in the doubly and singly scattered system, respectively. The configuration of double-moving diffusers is demonstrated to have better performance in speckle suppression compared with the single diffuser and moving-static double diffusers cases. The experiment results verify the feasibility of the approach. The presented approach only requires a single shot interferogram to realize the speckle reduction, accordingly it has the potential application in real-time measurement.

Published in Photonics

ISSN: 2304-6732 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Technology: Engineering (General). Civil engineering (General): Applied optics. Photonics
Website: http://www.mdpi.com/journal/photonics

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