The formation of large scale reconstructed images through the use of holograms |
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Authors: | Takashi Tsuchitani Sumio Nakahara Hisaharu Tottori Kazuhito Kanazawa Takeyoshi Fujita |
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Institution: | (1) Opticom Research, Ltd., 1-20-25 Hirano, Kawanishi, Hyogo 666-0121, Japan;(2) High-technology Research Center, Kansai University, 3-3-35 Yamate-cho, Suita, Osaka 564-8680, Japan;(3) Former Hanshin Expressway Company, Ltd., 4-1-3 Kyutaro-cho, Chuo-ku, Osaka 541-0056, Japan;(4) Hanshin Expressway Company, Ltd., 4-1-3 Kyutaro-cho, Chuo-ku, Osaka 541-0056, Japan;(5) Department of Mechanical Systems Engineering, Kansai University, 3-3-35 Yamate-cho, Suita, Osaka 564-8680, Japan |
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Abstract: | We propose and demonstrate a method which constructs large size multicolor images using a holographic technique in limited
spaces, i.e., tunnels. A traffic sign image of the same size and color as an actual traffic sign board is displayed using
many comparative small holograms. Each hologram is composed of a single computer generated hologram (CGH). Though it was necessary
to make many CGHs, we have shortened the hologram production time by putting a reconstructed image on long distance, and using
many reconstruction sources. Moreover, though cross-talk images are caused in a color reconstruction, by adjusting the optical
system it is possible to make sure that drivers see only the appropriate image. Many holograms function as one big hologram,
and it has been confirmed that a large reconstructed image can be displayed in a limited space. |
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Keywords: | traffic sign hologram CGH cross-talk Fresnel Huygens-Fresnel |
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