19 April 2012 Floating image display with a fine pixel pitchcomputer-generated hologram
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The floating 3-D image, when utilized as a 3-D display, gives a strong dimensional impression to the viewer. Few researches, however, have been conducted on the floating image display by means of the computer-generated hologram (CGH). Since the required pixel pitch is narrow compared with the non-floating image display, the CGH that displays the floating image could hardly be output. If the CGH is output by the device with insufficient pixel pitch, the viewing area and image size of the CGH are not suitable for practical use. Therefore, the object is usually placed behind the hologram to relax the pixel pitch. Reducing the time in calculation is also required. The authors have been developing the fringe printer, the device for fringe patterns, which can be reproduce holograms with the pixel pitch as fine as 0.44 μm. This study investigates the fabrication the floating image display, which is output by the fringe printer, with wider viewing angle and larger image size. It is clear that the image is necessarily reconstructed by the conjugate of the original reference wave to reproduce the real image.
© 2012 Society of Photo-Optical Instrumentation Engineers (SPIE)
Hiroshi Yoshikawa, Hiroshi Yoshikawa, Takeshi Yamaguchi, Takeshi Yamaguchi, Tomohisa Ito, Tomohisa Ito, Hiroyuki Ozawa, Hiroyuki Ozawa, } "Floating image display with a fine pixel pitchcomputer-generated hologram," Optical Engineering 51(4), 045801 (19 April 2012). https://doi.org/10.1117/1.OE.51.4.045801 . Submission:

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