Phase-Only Hologram Encoding Based on One-Dimensional Grating Function

Wang Caihong1,2 Chen Ni2 Yu Yingjie1 Situ Guohai2

(1.School of Mechatronic Engineering and Automation, Shanghai University, Shanghai, China 200072)
(2.Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai, China 201800)

【Abstract】A phase-only encoding method based on one-dimensional grating function is proposed. Based on double-phase hologram encoding technique, the complex amplitude image is encoded into a phase-only image, and then the image is directly loaded into the spatial light modulator for image reconstruction. During the optical reconstruction, a 4-f system with a low pass filter is used to select the diffraction order, and the first-order diffraction component is chosen for reconstruction. The one-dimensional grating encoding function can improve the energy of the first-order diffraction component. The quality of the reconstructed images is increased because there is no interference from zero-order information of the phase element. The numerical and experimental results show that the encoded amplitude and phase of the complex object can be reconstructed effectively, and the power of the first-order diffraction got from the proposed method is higher than that of two-dimensional checkboard encoding function.

【Keywords】 holography; computer generated hologram; phase modulation; one-dimensional grating; phase-only hologram;

【Funds】 National Natural Science Foundation of China (61377005) Natural Science Foundation of Shanghai City (17ZR1433800)

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(Translated by CAI ZJ)

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This Article

ISSN:0253-2239

CN: 31-1252/O4

Vol 37, No. 09, Pages 75-80

September 2017

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Article Outline

Abstract

  • 1 Introduction
  • 2 Principle of phase encoding by one-dimensional grating function
  • 3 Numerical simulation and experimental verification
  • 4 Conclusions
  • References

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