Current Optics and Photonics

Optical Society of Korea (한국광학회)
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Analytical Study of the Image Reconstruction of Fourier Holograms Using Varifocal Electric-Field-Driven Liquid Crystal Fresnel Lenses

  • Kim, Taehyeon (Department of Electronic Engineering, Inha University) ;
  • Lee, Seung-Chul (Department of Electronic Engineering, Inha University) ;
  • Park, Woo-Sang (Department of Electronic Engineering, Inha University)
  • Received : 2019.11.05
  • Accepted : 2020.01.17
  • Published : 2020.04.25
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Abstract

A novel method is proposed for controlling the distance of an image plane in Fourier holograms using varifocal electric-field-driven liquid-crystal (ELC) lenses. Phase Fresnel lenses are employed to reduce the thickness and response time of the ELC lenses. The voltages applied to the electrodes of the ELC Fresnel lens are adjusted so that the lens has the same retardation distribution as an ideal lens. The focal length can be controlled by changing the retardation distribution with the applied voltages. Simulations were conducted for the image reconstruction of Fourier holograms with various focal lengths of the ELC Fresnel lenses. The simulation results indicate that the distance of the image plane can be properly controlled with the varifocal ELC Fresnel lens.

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References

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