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Chin. Opt. Lett.
 Home  List of Issues    Issue 06 , Vol. 15 , 2017    10.3788/COL201715.060901


Gradation representation method using a binary-weighted computer-generated hologram based on pulse-width modulation
Masato Fujiwara1, Naoki Takada2, Hiromitsu Araki1, Chun Wei Ooi3, Shohei Ikawa3, Yuki Maeda1, Hiroaki Niwase1, Takashi Kakue4, Tomoyoshi Shimobaba4, and Tomoyoshi Ito4
1 Graduate School of Integrated Arts and Sciences, [Kochi University], Kochi, 780-8520, Japan
2 Science Department, Natural Sciences Cluster, Research and Education Faculty,[ Kochi University], Kochi 780-852 0, Japan
3 Faculty of Science, [Kochi University], Kochi 780-8520, Japan
4 Graduate School of Engineering, [Chiba University], Chiba, 263-8522, Japan

Chin. Opt. Lett., 2017, 15(06): pp.060901

DOI:10.3788/COL201715.060901
Topic:Holography
Keywords(OCIS Code): 090.1760  090.0090  090.2870  

Abstract
We propose a simple gradation representation method using a binary-weighted computer-generated hologram (CGH) to be displayed on a high-speed spatial light modulator that can be controlled by the pulse-width modulation technique. The proposed method uses multiple bit planes comprising binary-weighted CGHs with various pulse widths. The object points of a three-dimensional (3D) object are assigned to multiple bit planes according to their gray levels. The bit planes are sequentially displayed in a time-division-multiplexed manner. Consequently, the proposed method realizes a gradation representation of a reconstructed 3D object.

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:2017/1/11
Accepted:2017/2/24
Posted online:2017/3/17

Get Citation: Masato Fujiwara, Naoki Takada, Hiromitsu Araki, Chun Wei Ooi, Shohei Ikawa, Yuki Maeda, Hiroaki Niwase, Takashi Kakue, Tomoyoshi Shimobaba, and Tomoyoshi Ito, "Gradation representation method using a binary-weighted computer-generated hologram based on pulse-width modulation," Chin. Opt. Lett. 15(06), 060901(2017)

Note: This work was partially supported by the Japan Society for the Promotion of Science through a Grant-in-Aid for Scientific Research (C), 15K00153, and a Grant-in-Aid for Scientific Research (A), 25240015.



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