Optical Review

, Volume 25, Issue 1, pp 143–148 | Cite as

Laser speckle reduction using motionless image conduits

  • Wenzhi Cheng
  • Zhaomin Tong
  • Suotang Jia
  • Xuyuan Chen
Special Section: Regular Paper Laser Display and Lighting Conference (LDC' 17), Yokohama, Japan
First Online:
Received:
Accepted:
Part of the following topical collections:
  1. Laser Display and Lighting Conference (LDC' 17), Yokohama, Japan

Abstract

We have demonstrated a speckle reduction method using motionless image conduits (MICs). Different experimental conditions by introducing the high-coherence HeNe laser and the low-coherence laser diode (LD) as the illumination light sources, by employing the straight MIC and the curved MIC as the speckle reduction components, and by recording speckle images without (objective speckle) and with (subjective speckle) the imaging lens mounted on the CCD camera are conducted, respectively. The most efficient speckle reduction condition is found by the combination of using the LD and the curved MIC, where the objective speckle contrast ratio is reduced from 0.7378 to 0.1725. Experimental results are discussed, and the causes for these speckle reduction efficiency changes are given.

Keywords

Speckle Speckle reduction Image conduits 
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Notes

Acknowledgements

This research was supported by the National Key Research and Development Program of China (2016YFB0401903 and 2016YFB0402003), the National Natural Science Foundation of China (NSFC) (61404104), the Key Research and Development Program of Shanxi Province for International Cooperation (201703D421015), the Changjiang Scholars and Innovative Research Team in University of Ministry of Education of China (IRT13076), and the State Key Program of National Natural Science of China (11434007).

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Copyright information

© The Optical Society of Japan 2017

Authors and Affiliations

  • Wenzhi Cheng
    • 1
    • 2
  • Zhaomin Tong
    • 1
    • 2
  • Suotang Jia
    • 1
    • 2
  • Xuyuan Chen
    • 1
    • 2
    • 3
  1. 1.State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser SpectroscopyShanxi UniversityTaiyuanPeople’s Republic of China
  2. 2.Collaborative Innovation Center of Extreme OpticsShanxi UniversityTaiyuanPeople’s Republic of China
  3. 3.Department of Micro- and Nanosystem Technology, Faculty of Technology and Maritime SciencesUniversity College of Southeast NorwayBorreNorway

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