24 February 2017 Gradation representation method using binary-weighted computer-generated hologram
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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.
© 2017 Society of Photo-Optical Instrumentation Engineers (SPIE)
Masato Fujiwara, Naoki Takada, Hiromitsu Araki, Shohei Ikawa, Hiroaki Niwase, Yuki Maeda, Hirotaka Nakayama, Takashi Kakue, Tomoyoshi Shimobaba, Tomoyoshi Ito, "Gradation representation method using binary-weighted computer-generated hologram," Optical Engineering 56(2), 023105 (24 February 2017). https://doi.org/10.1117/1.OE.56.2.023105 . Submission: Received: 6 December 2016; Accepted: 6 February 2017
Received: 6 December 2016; Accepted: 6 February 2017; Published: 24 February 2017
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