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Optical Engineering • new

Gradation representation method using binary-weighted computer-generated hologram
Author(s): Masato Fujiwara; Naoki Takada; Hiromitsu Araki; Shohei Ikawa; Hiroaki Niwase; Yuki Maeda; Hirotaka Nakayama; Takashi Kakue; Tomoyoshi Shimobaba; Tomoyoshi Ito
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Paper Abstract

We propose a simple gradation representation method for a reconstructed three-dimensional (3-D) image without controlling the brightness of the reference light. In the proposed method, we use multiple bit planes comprised of binary-weighted computer-generated holograms (CGHs) with various light transmittances. Binary-weighted CGH is generated by changing the white in the conventional binary CGH to gray. The light transmittance of a binary-weighted CGH is less than that of a conventional binary CGH. The object points of a 3-D object are assigned to multiple bit planes according to the gray level of the object points. The multiple bit planes are displayed sequentially in a time-division multiplex manner. Consequently, the proposed method realizes a gradation representation of a reconstructed 3-D object.

Paper Details

Date Published: 24 February 2017
PDF: 6 pages
Opt. Eng. 56(2) 023105 doi: 10.1117/1.OE.56.2.023105
Published in: Optical Engineering Volume 56, Issue 2
Show Author Affiliations
Masato Fujiwara, Kochi Univ. (Japan)
Naoki Takada, Kochi Univ. (Japan)
Hiromitsu Araki, Kochi Univ. (Japan)
Shohei Ikawa, Kochi Univ. (Japan)
Hiroaki Niwase, Kochi Univ. (Japan)
Yuki Maeda, Kochi Univ. (Japan)
Hirotaka Nakayama, National Astronomical Observatory of Japan (Japan)
Takashi Kakue, Chiba Univ. (Japan)
Tomoyoshi Shimobaba, Chiba Univ. (Japan)
Tomoyoshi Ito, Chiba Univ. (Japan)


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