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Chin. Opt. Lett.
 Home  List of Issues    Issue 10 , Vol. 16 , 2018    10.3788/COL201816.100901


Image magnified lensless holographic projection by convergent spherical beam illumination
Chenliang Chang1;2, Yijun Qi2, Jun Wu2, Jun Xia2, and Shouping Nie1
1 Jiangsu Key Laboratory for Opto-Electronic Technology, School of Physics and Technology, [Nanjing Normal University], Nanjing 21 0023, China
2 Joint International Research Laboratory of Information Display and Visualization, School of Electronic Science and Engineering, [Southeast University], Nanjing 2 10096, China

Chin. Opt. Lett., 2018, 16(10): pp.100901

DOI:10.3788/COL201816.100901
Topic:Holography
Keywords(OCIS Code): 090.2870  090.1760  

Abstract
In liquid crystal spatial light modulator (SLM)-based holographic projection, the image is usually displayed at a distant projection screen through free space diffraction from a computer-generated hologram (CGH). Therefore, it allows for removing of the projection lens for the sake of system simplification and being aberration free, known as the “lensless holographic projection”. However, the maximum size of the optical projected image is limited by the diffraction angle of the SLM. In this Letter, we present a method for the implementation of image magnification in a lensless holographic projection system by using convergent spherical wave illumination to the SLM. The complete complex amplitude of the image wavefront is reconstructed in a lensless optical filtering system from a phase-only CGH that is encoded by the off-axis double-phase method. The dimensions of the magnified image can break the limitation by the maximum diffraction angle of the SLM at a given projection distance. Optical experiment results with successful image magnification in the lensless holographic projection system are presented.

Copyright: © 2003-2012 . This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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Received:2018/7/11
Accepted:2018/8/27
Posted online:2018/9/21

Get Citation: Chenliang Chang, Yijun Qi, Jun Wu, Jun Xia, and Shouping Nie, "Image magnified lensless holographic projection by convergent spherical beam illumination," Chin. Opt. Lett. 16(10), 100901(2018)

Note: This work was supported by the National Natural Science Foundation of China (NSFC) (Nos. 61605080 and 61775035) and the National 863 Program of China (No. 2015AA016301).



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