Research of characteristics of laser speckle of plastic optical fiber

ZHU Yuhan; HE Fengtao; PENG Xiaolong

doi:10.7510/jgjs.issn.1001-3806.2016.01.027

In order to solve the speckle problem in laser imaging systems, characteristics of laser speckle in imaging systems were studied with the fiber vibrated by a speaker driven by ULN2003 chip. In this experiment, using 532nm wavelength laser as light source of system and using linear CCD image sensor acquisition system to acquire laser speckle images, laser speckle contrast of plastic fiber was analyzed at different vibration frequencies. The results show that when fiber vibration amplitude is stable and vibration frequency increases from 0Hz to 20Hz, image speckle contrast decreases. When vibration frequency is more than 16Hz, image speckle contrast tends to be stable and can get good effect of speckle elimination. The study can be used for laser display, laser imaging and other fields.

Research of characteristics of laser speckle of plastic optical fiber

Corresponding author: HE Fengtao, hefengtao@xupt.edu.cn;

1. College of Electronic Engineering, Xi'an University of Post and Telecommunications, Xi'an 710061, China

Received Date: 2014-11-11

Accepted Date: 2015-01-07

Available Online: 2016-01-25

Abstract: In order to solve the speckle problem in laser imaging systems, characteristics of laser speckle in imaging systems were studied with the fiber vibrated by a speaker driven by ULN2003 chip. In this experiment, using 532nm wavelength laser as light source of system and using linear CCD image sensor acquisition system to acquire laser speckle images, laser speckle contrast of plastic fiber was analyzed at different vibration frequencies. The results show that when fiber vibration amplitude is stable and vibration frequency increases from 0Hz to 20Hz, image speckle contrast decreases. When vibration frequency is more than 16Hz, image speckle contrast tends to be stable and can get good effect of speckle elimination. The study can be used for laser display, laser imaging and other fields.

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Reference (15)

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Research of characteristics of laser speckle of plastic optical fiber

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