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Full Color Computer-Generated Rainbow Hologram with Enlarged Viewing Angle


The viewing angle of a computer-generated hologram (CGH) can be expanded by lens-less Fourier configuration. However, a laser is required to illuminate the CGH for reconstruction. We proposed earlier making a second hologram for white-light reconstruction; here, we propose a method to calculate CGH for a full-color rainbow hologram with enlarged viewing angle. First, we calculate the master hologram with three virtual slits whose positions correspond to red, green and blue wavelength. The transfer hologram can be made from the master CGH with a single exposure. In the experimental result, we obtain a full-color computer-generated rainbow hologram with 17° of viewing angle and 3.0mm × 2.5 mm image size.

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Correspondence to Hiroshi Yoshikawa.

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Yoshikawa, H., Kagotani, A. Full Color Computer-Generated Rainbow Hologram with Enlarged Viewing Angle. OPT REV 9, 251–254 (2002).

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Key words

  • holography
  • computer-generated hologram
  • enlarged viewing angle
  • full color
  • rainbow hologram