Speckle reduction by macro-pixel separation based on double-phase holographic display

Zhentao Qin; Yuan Chen; Jinlei Zhang; Yi Huang; Peng Sun; Zhenrong Zheng

doi:10.1117/12.2527742

6 September 2019 Speckle reduction by macro-pixel separation based on double-phase holographic display

Zhentao Qin, Yuan Chen, Jinlei Zhang, Yi Huang, Peng Sun, Zhenrong Zheng

Proceedings Volume 11136, Optics and Photonics for Information Processing XIII; 1113606 (2019) https://doi.org/10.1117/12.2527742
Event: SPIE Optical Engineering + Applications, 2019, San Diego, California, United States

Abstract

To obtain surreal and richer visual experience, augmented reality (AR) technology has been widely used in various areas. As a popular solution of AR, display using computer generated hologram (CGH) is often accompanied by blurring which is caused by uncontrolled interference. In this paper, a modified algorithm based on double-phase hologram (DPH) algorithm is proposed to reduce speckle noise in holographic reconstruction. The macro-pixels in the original hologram are separated into multiple sub-holograms, and these sub-holograms are displayed alternately in high frequency, which reduces the speckle noise generated from the interference between adjacent macro-pixels. Meanwhile, the method is less time-consuming than the traditional Gerchberg-Saxton algorithm because no iteration is needed. The simulation and the optical experiment based on liquid crystal on silicon (LCoS) have been conducted, and the results confirm the feasibility of the proposed method to improve the image quality.

Conference Presentation

Citation Download Citation

Zhentao Qin, Yuan Chen, Jinlei Zhang, Yi Huang, Peng Sun, and Zhenrong Zheng "Speckle reduction by macro-pixel separation based on double-phase holographic display", Proc. SPIE 11136, Optics and Photonics for Information Processing XIII, 1113606 (6 September 2019); https://doi.org/10.1117/12.2527742

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