Short-Coherence Light Source Digital Holography Imaging Using Light-Emitting Diodes

Abstract:

Light-emitting diode (LED) is a kind of short-coherence light source, and it can generate time gating effect and reduce the speckle noises in digital holography. Meanwhile, it can cut down the cost of the setup since LED is cheaper than laser. In this paper, an in-line digital holography setup was designed with LED, and the holograms were reconstructed by four-step phase shifting method. Comparing with the phase image obtained by the laser-based setup, results show that the phase image of USAF test target possesses lower speckle noises with the help of LED. Finally, we reconstruct a series of intensity images with different depths of a coin, and these images are fused to get a synthesized image with more information.

• Periodical: Advanced Materials Research (Volumes 718-720)
• Pages: 2281-2285
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.718-720.2281
• Online since: July 2013
• Authors: Pu Hui Meng, Da Yong Wang, Yun Xin Wang
• Keywords: Digital Holography, Four-Step Phase Shifting, Light Emitting Diode (LED)

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